US20100075971A1

US20100075971A1 - Substituted pyridine derivatives useful in the treatment of cancer and other disorders

Info

Publication number: US20100075971A1
Application number: US12/628,735
Authority: US
Inventors: Jacques Dumas; Wendy Lee; Yuanwei Chen; Lila Adnane; William J. Scott; Sharad Verma; Jianqing Chen; Zhi Chen; Lin Yi
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-02-28
Filing date: 2009-12-01
Publication date: 2010-03-25
Also published as: DE602004027218D1; DK1599467T3; CY1111143T1; US20040229937A1; MXPA05009067A; IL170503A; KR101109262B1; US7928227B2; ATE468331T1; ES2344347T3; AR043437A1; AU2004217977A1; TW200504053A; KR20050106050A; SI1599467T1; US8076488B2; EP1599467B1; CA2517361A1; JP2006519264A; WO2004078747A1

Abstract

This invention relates to novel diaryl ureas, pharmaceutical compositions containing such compounds and the use of those compounds or compositions for treating hyper-proliferative and angiogenesis disorders, as a sole agent or in combination with cytotoxic therapies.

Description

RELATED APPLICATIONS

This application claims priority to Ser. No. 60/450,323, filed Feb. 28, 2003, Ser. No. 60/450,324 filed Feb. 28, 2003 and Ser. No. 60/450,348 filed Feb. 28, 2003 which are incorporated by reference herein.

FIELD OF THE INVENTION

This invention relates to novel compounds, pharmaceutical compositions containing such compounds and the use of those compounds or compositions for treating hyper-proliferative and angiogenesis disorders, as a sole agent or in combination with other active ingredients, e.g., cytotoxic therapies.

BACKGROUND OF THE INVENTION

Activation of the ras signal transduction pathway indicates a cascade of events that have a profound impact on cellular proliferation, differentiation, and transformation. Raf kinase, a downstream effector of ras, is recognized as a key mediator of these signals from cell surface receptors to the cell nucleus (Lowy, D. R.; Willumsen, B. M. Ann. Rev. Biochem. 1993, 62, 851; Bos, J. L. Cancer Res. 1989, 49, 4682). It has been shown that inhibiting the effect of active ras by inhibiting the raf kinase signaling pathway by administration of deactivating antibodies to raf kinase or by co-expression of dominant negative raf kinase or dominant negative MEK, the substrate of raf kinase, leads to the reversion of transformed cells to the normal growth phenotype (see: Daum et al. Trends Biochem. Sci. 1994, 19, 474-80; Fridman et al. J. Biol. Chem. 1994, 269, 30105-8. Kolch et al. (Nature 1991, 349, 426-28) have further indicated that inhibition of raf expression by antisense RNA blocks cell proliferation in membrane-associated oncogenes. Similarly, inhibition of raf kinase (by antisense oligodeoxynucleotides) has been correlated in vitro and in vivo with inhibition of the growth of a variety of human tumor types (Monia et al., Nat. Med. 1996, 2, 668-75). Some examples of small molecule inhibitors of Raf kinase activity are important agents for the treatment of cancer. (Naumann, U.; Eisenmann-Tappe, I.; Rapp, U. R. Recent Results Cancer Res. 1997, 143, 237; Monia, B. P.; Johnston, J. F.; Geiger, T.; Muller, M.; Fabbro, D. Nature Medicine 1996, 2, 668).
To support progressive tumor growth beyond the size of 1-2 mm³, it is recognized that tumor cells require a functional stroma, a support structure consisting of fibroblast, smooth muscle cells, endothelial cells, extracellular matrix proteins, and soluble factors (Folkman, J., Semin Oncol, 2002. 29(6 Suppl 16), 15-8). Tumors induce the formation of stromal tissues through the secretion of soluble growth factors such as PDGF and transforming growth factor-beta (TGF-beta), which in turn stimulate the secretion of complimentary factors by host cells such as fibroblast growth factor (FGF), epidermal growth factor (EGF), and vascular endothelial growth factor (VEGF). These stimulatory factors induce the formation of new blood vessels, or angiogenesis, which brings oxygen and nutrients to the tumor and allows it to grow and provides a route for metastasis. It is believed some therapies directed at inhibiting stroma formation will inhibit the growth of epithelial tumors from a wide variety of histological types. (George, D. Semin Oncol, 2001. 28(5 Suppl 17), 27-33; Shaheen, R. M., et al., Cancer Res, 2001. 61(4), 1464-8; Shaheen, R. M., et al. Cancer Res, 1999. 59(21), 5412-6). However, because of the complex nature and the multiple growth factors involved in angiogenesis process and tumor progression, an agent targeting a single pathway may have limited efficacy. It is desirable to provide treatment against a number of key signaling pathways utilized by tumors to induce angiogenesis in the host stroma. These include PDGF, a potent stimulator of stroma formation (Ostman, A. and C. H. Heldin, Adv Cancer Res, 2001, 80, 1-38), FGF, a chemo-attractant and mitogen for fibroblasts and endothelial cells, and VEGF, a potent regulator of vascularization.
PDGF is another key regulator of stromal formation which is secreted by many tumors in a paracrine fashion and is believed to promote the growth of fibroblasts, smooth muscle and endothelial cells, promoting stroma formation and angiogenesis. PDGF was originally identified as the v-sis oncogene product of the simian sarcoma virus (Heldin, C. H., et al., J Cell Sci Suppl, 1985, 3, 65-76). The growth factor is made up of two peptide chains, referred to as A or B chains which share 60% homology in their primary amino acid sequence. The chains are disulfide cross linked to form the 30 kDa mature protein composed of either AA, BB or AB homo- or heterodimmers. PDGF is found at high levels in platelets, and is expressed by endothelial cells and vascular smooth muscle cells. In addition, the production of PDGF is up regulated under low oxygen conditions such as those found in poorly vascularized tumor tissue (Kourembanas, S., et al., Kidney Int, 1997, 51(2), 438-43). PDGF binds with high affinity to the PDGF receptor, a 1106 amino acid 124 kDa transmembrane tyrosine kinase receptor (Heldin, C. H., A. Ostman, and L. Ronnstrand, Biochim Biophys Acta, 1998. 1378(1), 79-113). PDGFR is found as homo- or heterodimer chains which have 30% homology overall in their amino acid sequence and 64% homology between their kinase domains (Heldin, C. H., et al. Embo J, 1988, 7(5), 1387-93). PDGFR is a member of a family of tyrosine kinase receptors with split kinase domains that includes VEGFR2 (KDR), VEGFR3 (Flt4), c-Kit, and FLT3. The PDGF receptor is expressed primarily on fibroblast, smooth muscle cells, and pericytes and to a lesser extent on neurons, kidney is mesangial, Leydig, and Schwann cells of the central nervous system. Upon binding to the receptor, PDGF induces receptor dimerization and undergoes auto- and trans-phosphorylation of tyrosine residues which increase the receptors' kinase activity and promotes the recruitment of downstream effectors through the activation of SH2 protein binding domains. A number of signaling molecules form complexes with activated PDGFR including PI-3-kinase, phospholipase C-gamma, src and GAP (GTPase activating protein for p21-ras) (Soskic, V., et al. Biochemistry, 1999, 38(6), 1757-64). Through the activation of PI-3-kinase, PDGF activates the Rho signaling pathway inducing cell motility and migration, and through the activation of GAP, induces mitogenesis through the activation of p21-ras and the MAPK signaling pathway.
In adults, it is believed the major function of PDGF is to facilitate and increase the rate of wound healing and to maintain blood vessel homeostasis (Baker, E. A. and D. J. Leaper, Wound Repair Regen, 2000. 8(5), 392-8; Yu, J., A. Moon, and H. R. Kim, Biochem Biophys Res Commun, 2001. 282(3), 697-700). PDGF is found at high concentrations in platelets and is a potent chemoattractant for fibroblast, smooth muscle cells, neutrophils and macrophages. In addition to its role in wound healing PDGF is known to help maintain vascular homeostasis. During the development of new blood vessels, PDGF recruits pericytes and smooth muscle cells that are needed for the structural integrity of the vessels. PDGF is thought to play a similar role during tumor neovascularization. As part of its role in angiogenesis PDGF controls interstitial fluid pressure, regulating the permeability of vessels through its regulation of the interaction between connective tissue cells and the extracellular matrix. Inhibiting PDGFR activity can lower interstitial pressure and facilitate the influx of cytotoxics into tumors improving the anti-tumor efficacy of these agents (Pietras, K., et al. Cancer Res, 2002. 62(19), 5476-84; Pietras, K., et al. Cancer Res, 2001. 61(7), 2929-34).
PDGF can promote tumor growth through either the paracrine or autocrine stimulation of PDGFR receptors on stromal cells or tumor cells directly, or through the amplification of the receptor or activation of the receptor by recombination. Over expressed PDGF can transform human melanoma cells and keratinocytes (Forsberg, is K., et al. Proc Natl Acad Sci USA., 1993. 90(2), 393-7; Skobe, M. and N. E. Fusenig, Proc Natl Acad Sci USA, 1998. 95(3), 1050-5), two cell types that do not express PDGF receptors, presumably by the direct effect of PDGF on stroma formation and induction of angiogenesis. This paracrine stimulation of tumor stroma is also observed in carcinomas of the colon, lung, breast, and prostate (Bhardwaj, B., et al. Clin Cancer Res, 1996, 2(4), 773-82; Nakanishi, K., et al. Mod Pathol, 1997, 10(4), 341-7; Sundberg, C., et al. Am J Pathol, 1997, 151(2), 479-92; Lindmark, G., et al. Lab Invest, 1993, 69(6), 682-9; Vignaud, J. M., et al, Cancer Res, 1994, 54(20), 5455-63) where the tumors express PDGF, but not the receptor. The autocrine stimulation of tumor cell growth, where a large fraction of tumors analyzed express both the ligand PDGF and the receptor, has been reported in glioblastomas (Fleming, T. P., et al. Cancer Res, 1992, 52(16), 4550-3), soft tissue sarcomas (Wang, J., M. D. Coltrera, and A. M. Gown, Cancer Res, 1994, 54(2), 560-4) and cancers of the ovary (Henriksen, R., et al. Cancer Res, 1993, 53(19), 4550-4), prostate (Fudge, K., C. Y. Wang, and M. E. Stearns, Mod Pathol, 1994, 7(5), 549-54), pancreas (Funa, K., et al. Cancer Res, 1990, 50(3), 748-53) and lung (Antoniades, H. N., et al., Proc Natl Acad Sci USA, 1992, 89(9), 3942-6). Ligand independent activation of the receptor is found to a lesser extent but has been reported in chronic myelomonocytic leukemia (CMML) where the a chromosomal translocation event forms a fusion protein between the Ets-like transcription factor TEL and the PDGF receptor. In addition, activating mutations in PDGFR have been found in gastrointestinal stromal tumors in which c-Kit activation is not involved (Heinrich, M. C., et al., Science, 2003, 9, 9).
Certain PDGFR inhibitors will interfere with tumor stromal development and are believed to inhibit tumor growth and metastasis.
Another major regulator of angiogenesis and vasculogenesis in both embryonic development and some angiogenic-dependent diseases is vascular endothelial growth factor (VEGF; also called vascular permeability factor, VPF). VEGF represents a family of isoforms of mitogens existing in homodimeric forms due to alternative RNA splicing. The VEGF isoforms are reported to be highly specific for vascular endothelial cells (for reviews, see: Farrara et al. Endocr. Rev. 1992, 13, 18; Neufield et al. FASEB J. 1999, 13, 9).
VEGF expression is reported to be induced by hypoxia (Shweiki et al. Nature 1992, 359, 843), as well as by a variety of cytokines and growth factors, such as interleukin-1, interleukin-6, epidermal growth factor and transforming growth factor. To date, VEGF and the VEGF family members have been reported to bind to one or more of three transmembrane receptor tyrosine kinases (Mustonen et al. J. Cell Biol., 1995, 129, 895), VEGF receptor-1 (also known as flt-1 (fms-like tyrosine kinase-1)), VEGFR-2 (also known as kinase insert domain containing receptor (KDR); the murine analogue of KDR is known as fetal liver kinase-1 (flk-1)), and VEGFR-3 (also known as flt-4). KDR and flt-1 have been shown to have different signal transduction properties (Waltenberger et al. J. Biol. Chem. 1994, 269, 26988); Park et al. Oncogene 1995, 10, 135). Thus, KDR undergoes strong ligand-dependant tyrosine phosphorylation in intact cells, whereas flt-1 displays a weak response. Thus, binding to KDR is believed to be a critical requirement for induction of the full spectrum of VEGF-mediated biological responses.
In vivo, VEGF plays a central role in vasculogenesis, and induces angiogenesis and permeabilization of blood vessels. Deregulated VEGF expression contributes to the development of a number of diseases that are characterized by abnormal angiogenesis and/or hyperpermeability processes. It is believed regulation of the VEGF-mediated signal transduction cascade by some agents can provide a useful mode for control of abnormal angiogenesis and/or hyperpermeability processes.
Angiogenesis is regarded as an important prerequisite for growth of tumors beyond about 1-2 mm. Oxygen and nutrients may be supplied to cells in tumor smaller than this limit through diffusion. However, it is believed every tumor is dependent on angiogenesis for continued growth after it has reached a certain size. Tumorigenic cells within hypoxic regions of tumors respond by stimulation of VEGF production, which triggers activation of quiescent endothelial cells to stimulate new blood vessel formation. (Shweiki et al. Proc. Nat'l. Acad. Sci., 1995, 92, 768). In addition, VEGF production in tumor regions where there is no angiogenesis may proceed through the ras signal transduction pathway (Grugel et al. J. Biol. Chem., 1995, 270, 25915; Rak et al. Cancer Res. 1995, 55, 4575). In situ hybridization studies have demonstrated VEGF mRNA is strongly upregulated in a wide variety of human tumors, including lung (Mattern et al. Br. J. Cancer 1996, 73, 931), thyroid (Viglietto et al. Oncogene 1995, 11, 1569), breast (Brown et al. Human Pathol. 1995, 26, 86), gastrointestinal tract (Brown et al. Cancer Res. 1993, 53, 4727; Suzuki et al. Cancer Res. 1996, 56, 3004), kidney and bladder (Brown et al. Am. J. Pathol. 1993, 1431, 1255), ovary (Olson et al. Cancer Res. 1994, 54, 1255), and cervical (Guidi et al. J. Nat'l Cancer Inst. 1995, 87, 12137) carcinomas, as well as angiosacroma (Hashimoto et al. Lab. Invest. 1995, 73, 859) and several intracranial tumors (Plate et al. Nature 1992, 359, 845; Phillips et al. Int. J. Oncol. 1993, 2, 913; Berkman et al. J. Clin. Invest., 1993, 91, 153). Neutralizing monoclonal antibodies to KDR have been shown to be efficacious in blocking tumor angiogenesis (Kim et al. Nature 1993, 362, 841; Rockwell et al. Mol. Cell. Differ. 1995, 3, 315).
Over expression of VEGF, for example under conditions of extreme hypoxia, can lead to intraocular angiogenesis, resulting in hyperproliferation of blood vessels, leading eventually to blindness. Such a cascade of events has been observed for a number of retinopathies, including diabetic retinopathy, ischemic retinal-vein occlusion, and retinopathy of prematurity (Aiello et al. New Engl. J. Med. 1994, 331, 1480; Peer et al. Lab. Invest. 1995, 72, 638), and age-related macular degeneration (AMD; see, Lopez et al. Invest. Opththalmol. Vis. Sci. 1996, 37, 855).
In rheumatoid arthritis (RA), the in-growth of vascular pannus may be mediated by production of angiogenic factors. Levels of immunoreactive VEGF are high in the synovial fluid of RA patients, while VEGF levels were low in the synovial fluid of patients with other forms of arthritis of with degenerative joint disease (Koch et al. J. Immunol. 1994, 152, 4149). The angiogenesis inhibitor AGM-170 has been shown to prevent neovascularization of the joint in the rat collagen arthritis model (Peacock et al. J. Exper. Med. 1992, 175, 1135).
Increased VEGF expression has also been shown in psoriatic skin, as well as bullous disorders associated with subepidermal blister formation, such as bullous pemphigoid, erythema multiforme, and dermatitis herpetiformis (Brown et al. J. Invest. Dermatol. 1995, 104, 744).
The vascular endothelial growth factors (VEGF, VEGF-C, VEGF-D) and their receptors (VEGFR2, VEGFR3) are not only key regulators of tumor angiogenesis, but also lymphangiogenesis. VEGF, VEGF-C and VEGF-D are expressed in most tumors, primarily during periods of tumor growth and, often at substantially increased levels. VEGF expression is stimulated by hypoxia, cytokines, oncogenes such as ras, or by inactivation of tumor suppressor genes (McMahon, G. Oncologist 2000, 5(Suppl. 1), 3-10; McDonald, N. Q.; Hendrickson, W. A. Cell 1993, 73, 421-424).
The biological activities of the VEGFs are mediated through binding to their receptors. VEGFR3 (also called Flt-4) is predominantly expressed on lymphatic endothelium in normal adult tissues. VEGFR3 function is needed for new lymphatic vessel formation, but not for maintenance of the pre-existing lymphatics. VEGFR3 is also upregulated on blood vessel endothelium in tumors. Recently VEGF-C and VEGF-D, ligands for VEGFR3, have been identified as regulators of lymphangiogenesis in mammals. Lymphangiogenesis induced by tumor-associated lymphangiogenic factors could promote the growth of new vessels into the tumor, providing tumor cells access to systemic circulation. Cells that invade the lymphatics could find their way into the bloodstream via the thoracic duct. Tumor expression studies have allowed a direct comparison of VEGF-C, VEGF-D and VEGFR3 expression with clinicopathological factors that relate directly to the ability of primary tumors to spread (e.g., lymph node involvement, lymphatic invasion, secondary metastases, and disease-free survival). In many instances, these studies demonstrate a statistical correlation between the expression of lymphangiogenic factors and the ability of a primary solid tumor to metastasize (Skobe, M. et al. Nature Med. 2001, 7(2), 192-198; Stacker, S. A. et al. Nature Med. 2001, 7(2), 186-191; Makinen, T. et al. Nature Med. 2001, 7(2), 199-205; Mandriota, S. J. et al. EMBO J. 2001, 20(4), 672-82; Karpanen, T. et al. Cancer Res. 2001, 61(5), 1786-90; Kubo, H. et al. Blood 2000, 96(2), 546-53).
Hypoxia appears to be an important stimulus for VEGF production in malignant cells. Activation of p38 MAP kinase is required for VEGF induction by tumor cells in response to hypoxia (Blaschke, F. et al. Biochem. Biophys. Res. Commun. 2002, 296, 890-896; Shemirani, B. et al. Oral Oncology 2002, 38, 251-257). In addition to its involvement in angiogenesis through regulation of VEGF secretion, p38 MAP kinase promotes malignant cell invasion, and migration of different tumor types through regulation of collagenase activity and urokinase plasminogen activator expression (Laferriere, J. et al. J. Biol. Chem. 2001, 276, 33762-33772; Westermarck, J. et al. Cancer Res. 2000, 60, 7156-7162; Huang, S. et al. J. Biol. Chem. 2000, 275, 12266-12272; Simon, C. et al. Exp. Cell Res. 2001, 271, 344-355).
Some diarylureas have been described as having activity as serine-threonine kinase and/or as tyrosine kinase inhibitors. The utility of these diarylureas as an active ingredient in pharmaceutical compositions for the treatment of cancer, angiogenesis disorders, and inflammatory disorders has been demonstated. See Redman et al., Bioorg. Med. Chem. Lett. 2001, 11, 9-12; Smith et al., Bioorg. Med. Chem. Lett. 2001, 11, 2775-2778; Dumas et al., Bioorg. Med. Chem. Lett. 2000, 10, 2047-2050; Dumas et al., Bioorg. Med. Chem. Lett. 2000, 10, 2051-2054; Ranges et al., Book of Abstracts, 220^th ACS National Meeting, Washington, D.C., USA, MEDI 149; Dumas et al., Bioorg. Med. Chem. Lett. 2002, 12, 1559-1562; Lowinger et al., Clin. Cancer Res. 2000, 6(suppl.), 335; Lyons et al., Endocr.-Relat. Cancer 2001, 8, 219-225; Riedl et al., Book of Abstracts, 92^nd AACR Meeting, New Orleans, La., USA, abstract 4956; Khire et al., Book of Abstracts, 93^rd AACR Meeting, San Francisco, Calif., USA, abstract 4211; Lowinger et al., Curr. Pharm. Design 2002, 8, 99-110; Regan et al., J. Med. Chem. 2002, 45, 2994-3008; Pargellis et al., Nature Struct. Biol. 2002, 9(4), 268-272; Carter et al., Book of Abstracts, 92^nd AACR Meeting, New Orleans, La., USA, abstract 4954; Vincent et al., Book of Abstracts, 38^th ASCO Meeting, Orlando, Fla., USA, abstract 1900; Hilger et al., Book of Abstracts, 38^th ASCO Meeting, Orlando, Fla., USA, abstract 1916; Moore et al., Book of Abstracts, 38^th ASCO Meeting, Orlando, Fla., USA, abstract 1816; Strumberg et al., Book of Abstracts, 38^th ASCO Meeting, Orlando, Fla., USA, abstract 121; Madwed J B: Book of Abstracts, Protein Kinases: Novel Target Identification and Validation for Therapeutic Development, San Diego, Calif., USA, March 2002; Roberts et al., Book of Abstracts, 38^th ASCO Meeting, Orlando, Fla., USA, abstract 473; Tolcher et al., Book of Abstracts, 38^th ASCO Meeting, Orlando, Fla., USA, abstract 334; and Karp et al., Book of Abstracts, 38^th AACR Meeting, San Francisco, Calif., USA, abstract 2753.
Despite the advancements in the art, there remains a need for cancer treatments and anti-cancer compounds.

DESCRIPTION OF THE INVENTION

The present invention pertains to:
(i) novel compounds, salts, metabolites and prodrugs thereof, including diastereoisomeric forms,
(ii) pharmaceutical compositions containing any of such compounds, and
(iii) use of those compounds or compositions for treating diseases, e.g., hyper-proliferative and angiogenesis disorders, as a sole agent or in combination with other active ingredients, e.g., cytotoxic therapies.
The compounds of formula (I), salts, metabolites and prodrugs thereof, including diastereoisomeric forms (both isolated stereoisomers and mixtures of stereoisomers) are collectively referred to herein as the “compounds of the invention”. Formula I is as follows:
A is phenyl, naphthyl, mono- or bi-cyclic heteroaryl, or a group of the formula
optionally substituted with 1-4 substituents which are independently R¹, OR¹, S(O)_pR¹, C(O)R¹, C(O)OR¹, C(O)NR¹R², halogen, hydroxy, amino, cyano, or nitro;
B is phenyl, naphthyl, or pyridyl, optionally substituted with 1-4 substituents which are independently C₁-C₅linear or branched alkyl, C₁-C₅linear or branched haloalkyl, C₁-C₃alkoxy, hydroxy, amino, C₁-C₃alkylamino, C₁-C₆dialkylamino, halogen, cyano, or nitro.
B is preferably phenyl or pyridyl, optionally substituted with 1-4 substituents which are independently C₁-C₅linear or branched alkyl, C₁-C₅linear or branched haloalkyl, C₁-C₃alkoxy, hydroxy, amino, C₁-C₃alkylamino, C₁-C₆dialkylamino, halogen, cyano, or nitro.
L is a bridging group which is:
(a) —(CH₂)_m—O—(CH₂)_l—,
(b) —(CH₂)_m—(CH₂)_l—,
(c) —(CH₂)_m—C(O)—(CH₂)_l—,
(d) —(CH₂)_m—NR³—(CH₂)_l—,
(e) —(CH₂)_m—NR³C(O)—(CH₂)_l—,
(f) —(CH₂)_m—S—(CH₂)_l—,
(g) —(CH₂)_m—C(O)NR³—(CH₂)_l—, or
(h) a single bond.
The integers m and l are independently selected from 0-4 and are typically selected from 0-2.
L is most preferably —O— or —S—.
M is a pyridine ring, optionally substituted with 1-3 substituents which are independently C₁-C₅linear or branched alkyl, C₁-C₅linear or branched haloalkyl, C₁-C₃alkoxy, hydroxy, amino, C₁-C₃alkylamino, C₁-C₆dialkylamino, halogen, or nitro.

Q is:

(1) C(S)NR⁴R⁵;

(2) C(O)NR⁷—NR⁴R⁵;

(3) tetrazolyl;
(4) imidazolyl;
(5) imidazoline-2-yl;
(6) 1,3,4-oxadiazoline-2-yl;
(7) 1,3-thiazoline-2-yl;
(8) 5-thioxo-4,5-dihydro-1,3,4-thiazoline-2-yl;
(9) 5-oxo-4,5-dihydro-1,3,4-oxadiazoline-2-yl; or
(10) a group of the formula
and is preferably (1), (2) or (10).
Each of R¹, R², R¹³, R⁴and R⁵is independently
(a) hydrogen,
(b) C₁-C₅linear, branched, or cyclic alkyl,
(c) phenyl,
(d) C₁-C₃phenyl-alkyl,
(e) up to per-halo substituted C₁-C₅linear or branched alkyl, or
(f) —(CH₂)_q—X.
The substituent X is a 5 or 6 membered heterocyclic ring, containing at least one atom selected from oxygen, nitrogen and sulfur, which is saturated, partially saturated, or aromatic, or a 8-10 membered bicyclic heteroaryl having 1-4 heteroatoms selected from the group consisting of O, N and S.
In addition, R⁴and R⁵taken together may form a 5 or 6 membered aliphatic ring, which may be interrupted by an atom selected from N, O or S. This is optionally substituted with 1-3 substituents which are independently C₁-C₅linear or branched alkyl, up to perhalo substituted C₁-C₅linear or branched alkyl, C₁-C₃alkoxy, hydroxy, oxo, carboxy, amino, C₁-C₃alkylamino, C₁-C₆dialkylamino, halogen, cyano, or nitro.
R⁶is independently:
(a) hydrogen,
(b) C₁-C₅linear, branched, or cyclic alkyl,
(c) cyano,
(d) nitro,
(e) up to per-halo substituted C₁-C₅linear or branched alkyl, or
(f) —C(O)R⁷, where R⁷is C₁-C₅linear, branched, or cyclic alkyl.
R⁶is preferably independently:
(a) hydrogen,
(b) C₁-C₅linear, branched, or cyclic alkyl, or
(c) cyano or
(d) nitro, and most preferably, R⁶is independently:
(a) hydrogen,
(b) C₁-C₅linear, branched, or cyclic alkyl, or
(c) cyano.
R⁷is hydrogen, or C₁-C₅linear, branched, or cyclic alkyl.
The variable q is an integer 0, 1, 2, 3, or 4. The variable p is an integer 0, 1, or 2.
A group of compounds of interest are compounds of formula (I), salts, metabolites and prodrugs thereof, including diastereoisomeric forms (both isolated stereoisomers and mixtures of stereoisomers) wherein

A is

wherein A is substituted on any carbon atom by 0-4 substituents independently R¹, OR¹, S(O)_pR¹, C(O)R¹, C(O)OR¹, C(O)NR¹R², halogen, hydroxy, amino, cyano, or nitro; and B, L, M and Q of formula I are as defined above.
For these compounds,
B is preferably phenyl or pyridyl, optionally substituted with 1-4 substituents which are independently C₁-C₅linear or branched alkyl, C₁-C₅linear or branched haloalkyl, C₁-C₃alkoxy, hydroxy, amino, C₁-C₃alkylamino, C₁-C₆dialkylamino, halogen, cyano, or nitro.
L is preferably —O—,
M is preferably a pyridine ring substituted only by Q, and
Q is preferably

C(S)NR⁴R⁵;

C(O)NR⁷—NR⁴R⁵;

or
a group of the formula
wherein each of R¹, R², R⁴and R⁵is preferably, independently:
(a) hydrogen,
(b) C₁-C₅linear, branched, or cyclic alkyl,
(c) phenyl,
(d) C₁-C₃phenyl-alkyl,
(e) up to per-halo substituted C₁-C₅linear or branched alkyl, or
(f) —(CH₂)_q—X, where the substituent X is pyridinyl and the variable q is preferably an integer 0 or 1,
R⁶is preferably independently:
(a) hydrogen,
(b) C₁-C₅linear, branched, or cyclic alkyl, or
(c) cyano.
Another group of compounds of interest are compounds of formula (I), salts, metabolites and prodrugs thereof, including diastereoisomeric forms (both isolated stereoisomers and mixtures of stereoisomers) wherein

A is

and B, L, M and Q of formula I are as defined above, and the preferred values for B, L, M and Q of formula I are as defined above.
When any moiety is “substituted”, it can have up to the highest number of indicated substituents, and each substituent can be located at any available position on the moiety and can be attached through any available atom on the substituent. “Any available position” means any position on the moiety that is chemically accessible through means known in the art or taught herein and that does not create an unduly unstable molecule. When there are two or more substituents on any moiety, each substituent is defined independently of any other substituent and can, accordingly, be the same or different.
The term “optionally substituted” means that the moiety so modified may be is either unsubstituted, or substituted with the identified substituent(s).
It is understood that since M is pyridine, the term “hydroxy” as a pyridine substituent includes 2-, 3-, and 4-hydroxypyridine, but also includes those structures referred to in the art as 1-oxo-pyridine, 1-hydroxy-pyridine and pyridine N-oxide.
Where the plural form of the word compounds, salts, and the like, is used herein, this is taken to mean also a single compound, salt, or the like.
The term C₁-C₅alkyl means straight or branched chain alkyl groups having from one to five carbon atoms, which may be linear or branched with single or multiple branching. Such groups include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, and the like.
The term haloC₁-C₅alkyl means a saturated hydrocarbon radical having up to five carbon atoms, which is substituted with a least one halogen atom, up to perhalo. The radical may be linear or branched with single or multiple branching. The halo substituent(s) include fluoro, chloro, bromo, or iodo. Fluoro, chloro and bromo are preferred, and fluoro and chloro are more preferred. The halogen substituent(s) can be located on any available carbon. When more than one halogen substituent is present on this moiety, they may be the same or different. Examples of such halogenated alkyl substituents include but are not limited to chloromethyl, dichloromethyl, trichloromethyl, fluoromethyl, difluoromethyl, trifluoromethyl, 2,2,2-trifluoroethyl, and 1,1,2,2-tetrafluoroethyl, and the like.
The term C₁-C₃alkoxy means straight or branched chain alkoxy group having from one to three saturated carbon atoms which may be linear or branched with single or multiple branching, and includes such groups as methoxy, ethoxy, n-propoxy, isopropoxy, and the like. It also includes halogenated groups such as 2,2-dichloroethoxy, trifluoromethoxy, and the like.
Halo or halogen means fluoro, chloro, bromo, or iodo. Fluoro, chloro and bromo are preferred, and fluoro and chloro are more preferred.
C₁-C₃alkylamine means methylamino, ethylamino, propylamino or isopropylamino.
Examples of C₁-C₆dialkylamine include but are not limited to diethylamino, ethyl-isopropylamino, methyl-isobytulamino and dihexylamino.
The term heteroaryl refers to both monocyclic and bicyclic heteroaryl rings. Monocyclic heteroaryl means an aromatic monocyclic rings having 5 to 6 ring atoms, at least one of which is a hetero atom selected from N, O and S, the remaining atoms being carbon. When more than one hetero atom is present in the moiety, they are selected independently from the other(s) so that they may be the same or different. Monocyclic heteroaryl rings include, but are not limited to pyrrole, furan, thiophene, imidazole, pyrazole, thiazole, oxazole, isoxazole, isothiazole, triazole, tetrazole, thiadiazole, oxadiazole, pyridine, pyrimidine, pyridazine, pyrazine, and triazine.
Bicyclic heteroaryl means fused bicyclic moieties where one of the rings is chosen from the monocyclic heteroaryl rings described above and the second ring is either benzene or another monocyclic heteroaryl ring described above. When both rings in the bicyclic moiety are heteroaryl rings, they may be the same or different, as long as they are chemically accessible by means known in the art. Bicyclic heteroaryl rings include synthetically accessible 5-5, 5-6, or 6-6 fused bicyclic aromatic structures including, for example but not by way of limitation, benzoxazole (fused benzene and oxazole), indazole (fused benzene and pyrazole), quinoline (fused phenyl and pyridine), quinazoline (fused pyrimidine and benzene), imidazopyrimidine (fused imidazole and pyrimidine), naphtyridine (two fused pyridines), and the like.
The term “5 or 6 membered heterocyclic ring, containing at least one atom selected from oxygen, nitrogen and sulfur, which is saturated, partially saturated, or is aromatic” includes, by no way of limitation, tetrahydropyrane, tetrahydrofurane, 1,3-dioxolane, 1,4-dioxane, morpholine, thiomorpholine, piperazine, piperidine, piperidinone, tetrahydropyrimidone, pentamethylene sulfide, tetramethylene sulfide, dihydropyrane, dihydrofurane, dihydrothiophene, pyrrole, furan, thiophene, imidazole, pyrazole, thiazole, oxazole, isoxazole, isothiazole, triazole, pyridine, pyrimidine, pyridazine, pyrazine, triazine, and the like.
Non-limiting examples of Q substituents where R⁴and R⁵taken together may form a 5 or 6 membered aliphatic ring, which may be interrupted by an atom selected from N, O or S, which is optionally substituted include:
The term “C₁-C₃phenyl-alkyl” includes, by no way of limitation, 3-phenyl-propyl, 2-phenyl-1-methyl-ethyl. Substituted examples include 2-[2-chlorophenyl]ethyl, 3,4-dimethylphenyl-methyl, and the like.
The compounds of Formula I may contain one or more asymmetric centers, depending upon the location and nature of the various substituents desired. Asymmetric carbon atoms may be present in the (R) or (S) configuration or (R,S) configuration. In certain instances, asymmetry may also be present due to restricted rotation about a given bond, for example, the central bond adjoining two substituted aromatic rings of the specified compounds. Substituents on a ring may also be present in either cis or trans form. It is intended that all such configurations (including enantiomers and diastereomers), are included within the scope of the present invention. Preferred compounds are those with the absolute configuration of the compound of Formula I which produces the more desirable biological activity. Separated, pure or partially purified isomers or racemic mixtures of the compounds of this invention are also included within the scope of the present invention. The purification of said isomers and the separation of said isomeric mixtures can be accomplished by standard techniques known in the art.
The optical isomers can be obtained by resolution of the racemic mixtures according to conventional processes, for example, by the formation of diastereoisomeric salts using an optically active acid or base or formation of covalent diastereomers. Examples of appropriate acids are tartaric, diacetyltartaric, ditoluoyltartaric and camphorsulfonic acid. Mixtures of diastereoisomers can be separated into their individual diastereomers on the basis of their physical and/or chemical differences by methods known in the art, for example, by chromatography or fractional crystallization. The optically active bases or acids are then liberated from the separated diastereomeric salts. A different process for separation of optical isomers involves the use of chiral chromatography (e.g., chiral HPLC columns), with or without conventional derivation, optimally chosen to maximize the separation of the enantiomers. Suitable chiral HPLC columns are manufactured by Diacel, e.g., Chiracel OD and Chiracel OJ among many others, all routinely selectable. Enzymatic separations, with or without derivitization, are also useful. The optically active compounds of Formula I can likewise be obtained by chiral syntheses utilizing optically active starting materials.
The present invention also relates to useful forms of the compounds as disclosed herein, such as pharmaceutically acceptable salts, metabolites and prodrugs of all the compounds Formula (I). The term “pharmaceutically acceptable salt” refers to a relatively non-toxic, inorganic or organic acid addition salt of a compound of the present invention. For example, see S. M. Berge, et al. “Pharmaceutical Salts,” J. Pharm. Sci. 1977, 66, 1-19. Pharmaceutically acceptable salts include those obtained by reacting the main compound, functioning as a base, with an inorganic or organic acid to form a salt, for example, salts of hydrochloric acid, sulfuric acid, phosphoric acid, methane sulfonic acid, camphor sulfonic acid, oxalic acid, maleic acid, succinic acid and citric acid. Pharmaceutically acceptable salts also include those in which the main compound functions as an acid and is reacted with an appropriate base to form, e.g., sodium, potassium, calcium, magnesium, ammonium, and choline salts. Those skilled in the art will further recognize that acid addition salts of the claimed compounds may be prepared by reaction of the compounds with the appropriate inorganic or organic acid via any of a number of known methods. Alternatively, alkali and alkaline earth metal salts are prepared by reacting the compounds of the invention with the appropriate base via a variety of known methods.
Representative salts of the compounds of this invention include the conventional non-toxic salts and the quaternary ammonium salts which are formed, for example, from inorganic or organic acids or bases by means well known in the art. For example, such acid addition salts include acetate, adipate, alginate, ascorbate, aspartate, benzoate, benzenesulfonate, bisulfate, butyrate, citrate, camphorate, camphorsulfonate, cinnamate, cyclopentanepropionate, digluconate, dodecylsulfate, ethanesulfonate, fumarate, glucoheptanoate, glycerophosphate, hemisulfate, heptanoate, hexanoate, hydrochloride, hydrobromide, hydroiodide, 2-hydroxyethanesulfonate, itaconate, lactate, maleate, mandelate, methanesulfonate, 2-naphthalenesulfonate, nicotinate, nitrate, oxalate, pamoate, pectinate, persulfate, 3-phenylpropionate, picrate, pivalate, propionate, succinate, sulfonate, tartrate, thiocyanate, tosylate, and undecanoate.
Base salts include alkali metal salts such as potassium and sodium salts, alkaline earth metal salts such as calcium and magnesium salts, and ammonium salts with organic bases such as dicyclohexylamine and N-methyl-D-glucamine. Additionally, basic nitrogen containing groups may be quaternized with such agents as lower alkyl halides such as methyl, ethyl, propyl, and butyl chlorides, bromides and iodides; dialkyl sulfates like dimethyl, diethyl, and dibutyl sulfate; and diamyl sulfates, long chain halides such as decyl, lauryl, myristyl and stearyl chlorides, bromides and iodides, aralkyl halides like benzyl and phenethyl bromides and others.
Certain compounds of this invention can be further modified with labile functional groups that are cleaved after in vivo administration to furnish the parent active agent and the pharmacologically inactive derivatizing (functional) group. These derivatives, commonly referred to as prodrugs, can be used, for example, to alter the physicochemical properties of the active agent, to target the active agent to a specific tissue, to alter the pharmacokinetic and pharmacodynamic properties of the active agent, and to reduce undesirable side effects
Prodrugs of the invention include, e.g., the esters of appropriate compounds of this invention are well-tolerated, pharmaceutically acceptable esters such as alkyl esters including methyl, ethyl, propyl, isopropyl, butyl, isobutyl or pentyl esters. Additional esters such as phenyl-C₁-C₅alkyl may be used, although methyl ester is preferred.
Methods for synthesizing prodrugs are described in the following reviews on the subject, which are incorporated herein by reference for their description of these methods:

Higuchi, T.; Stella, V. eds. Prodrugs As Novel Drug Delivery Systems. ACS Symposium Series. American Chemical Society: Washington, D.C. (1975).
Roche, E. B. Design of Biopharmaceutical Properties through Prodrugs and Analogs. American Pharmaceutical Association: Washington, D.C. (1977).
Sinkula, A. A.; Yalkowsky, S. H. J Pharm Sci. 1975, 64, 181-210.
Stella, V. J.; Charman, W. N. Naringrekar, V. H. Drugs 1985, 29, 455-473.
Bundgaard, H., ed. Design of Prodrugs. Elsevier: New York (1985).
Stella, V. J.; Himmelstein, K. J. J. Med. Chem. 1980, 23, 1275-1282.
Han, H-K; Amidon, G. L. AAPS Pharmsci 2000, 2, 1-11.
Denny, W. A. Eur. J. Med. Chem. 2001, 36, 577-595.
Wermuth, C. G. in Wermuth, C. G. ed. The Practice of Medicinal Chemistry Academic Press: San Diego (1996), 697-715.
Balant, L. P.; Doelker, E. in Wolff, M. E. ed. Burgers Medicinal Chemistry And Drug Discovery John Wiley & Sons: New York (1997), 949-982.

The metabolites of the compounds of this invention include oxidized derivatives of the compounds of Formula I, wherein one or more of the nitrogens are substituted with a hydroxy group; which includes derivatives where the nitrogen atom of the pyridine group is in the oxide form, referred to in the art as 1-oxo-pyridine or has a hydroxy substituent, referred to in the art as 1-hydroxy-pyridine.

General Preparative Methods

The particular process to be utilized in the preparation of the compounds used in this embodiment of the invention depends upon the specific compound desired. Such factors as the selection of the specific substituents play a role in the path to be followed in the preparation of the specific compounds of this invention. Those factors are readily recognized by one of ordinary skill in the art.
The compounds of the invention may be prepared by use of known chemical reactions and procedures. Nevertheless, the following general preparative methods are presented to aid the reader in synthesizing the compounds of the present invention, with more detailed particular examples being presented below in the experimental section describing the working examples.
All variable groups of these methods are as described in the generic description if they are not specifically defined below. When a variable group or substituent with a given symbol is used more than once in a given structure, it is to be understood that each of these groups or substituents may be independently varied within the range of definitions for that symbol. It is recognized that compounds of the invention with each claimed optional functional group cannot be prepared with each of the below-listed methods. Within the scope of each method optional substituents are used which are stable to the reaction conditions, or the functional groups which may participate in the reactions are present in protected form where necessary, and the removal of such protective groups is completed at appropriate stages by methods well known to those is skilled in the art.
The compounds of the invention can be made according to conventional chemical methods, and/or as disclosed below, from starting materials which are either commercially available or producible according to routine, conventional chemical methods. General methods for the preparation of the compounds are given below, and the preparation of representative compounds is specifically illustrated in examples.

General Method

The compounds (I) can be synthesized according to the reaction sequence shown in the General Method above. Thus, the compounds (I) can be synthesized by reacting amino compounds (III) with isocyante compounds (II).
The compounds (II) are commercially available or can be synthesized according to methods commonly known to those skilled in the art [e.g. from treatment of an amine with phosgene or a phosgene equivalent such as trichloromethyl chloroformate (diphosgene), bis(trichloromethyl)carbonate (triphosgene), or N,N′-carbonyldiimidazole (CDI); or, alternatively by a Curtius-type rearrangement of an amide, or a carboxylic acid derivative, such as an ester, an acid halide or an anhydride]. The compounds (III) are commercially available or can be synthesized according methods commonly known is to those skilled in the art.
In addition, specific preparations of diaryl ureas are already described in the patent literature, and can be adapted to the compounds of the present invention. For example, Miller S. et al, “Inhibition of p38 Kinase using Symmetrical and Unsymmetrical Diphenyl Ureas” PCT Int. Appl. WO 99 32463, Miller, S et al. “Inhibition of raf Kinase using Symmetrical and Unsymmetrical Substituted Diphenyl Ureas” PCT Int. Appl., WO 99 32436, Dumas, J. et al., “Inhibition of p38 Kinase Activity using Substituted Heterocyclic Ureas” PCT Int. Appl., WO 99 32111, Dumas, J. et al., “Method for the Treatment of Neoplasm by Inhibition of raf Kinase using N-Heteroaryl-N′-(hetero)arylureas” PCT Int. Appl., WO 99 32106, Dumas, J. et al., “Inhibition of p38 Kinase Activity using Aryl- and Heteroaryl-Substituted Heterocyclic Ureas” PCT Int. Appl., WO 99 32110, Dumas, J., et al., “Inhibition of raf Kinase using Aryl- and Heteroaryl-Substituted Heterocyclic Ureas” PCT Int. Appl., WO 99 32455, Riedl, B., et al., “O-Carboxy Aryl Substituted Diphenyl Ureas as raf Kinase Inhibitors” PCT Int. Appl., WO 00 42012, Riedl, B., et al., “O-Carboxy Aryl Substituted Diphenyl Ureas as p38 Kinase Inhibitors” PCT Int. Appl., WO 00 41698, Dumas, J. et al. “Heteroaryl ureas containing nitrogen hetero-atoms as p38 kinase inhibitors” U.S. Pat. Appl. Publ., US 20020065296, Dumas, J. et al. “Preparation of N-aryl-N′-[(acylphenoxy)phenyl]ureas as raf kinase inhibitors” PCT Int. Appl., WO 02 62763, Dumas, J. et al. “Inhibition of raf kinase using quinolyl, isoquinolyl or pyridyl ureas” PCT Int. Appl., WO 02 85857, Dumas, J. et al. “Preparation of quinolyl, isoquinolyl or pyridyl-ureas as inhibitors of raf kinase for the treatment of tumors and/or cancerous cell growth” U.S. Pat. Appl. Publ., US 20020165394. All the preceding patent applications are hereby incorporated by reference.
The reaction of the compounds (II) with (III) is carried out preferably in a solvent. Suitable solvents comprise the customary organic solvents which are inert under the reaction conditions. Non-limiting examples include ethers such as diethyl ether, dioxane, tetrahydrofuran, 1,2-dimethoxy ethane; hydrocarbons such as benzene, toluene, xylene, hexane, cyclohexane, mineral oil fractions; halogenated hydrocarbons such as dichloromethane, trichloromethane, carbon tetrachloride, dichloroethane, trichloroethylene, chlorobenzene; alcohols such as methanol, ethanol, n-propanol, isopropanol; esters such as ethyl acetate; ketones such as acetone; nitriles such as acetonitrile; heteroaromatics such as pyridine; polar solvents such as dimethyl formamide and hexamethyl phosphoric acid tris-amide; and mixtures of the above-mentioned solvents. Toluene, benzene, and dichloromethane are preferred.
The compounds (III) are generally employed in an amount of from 1 to 3 mol per mol of compounds (II); an equimolar amount or slight excess of compounds (III) is preferred.
The reaction of the compounds (II) with (III) is generally carried out within a relatively wide temperature range. In general, they are carried out in a range of from −20 to 200° C., preferably from 0 to 100° C., and more preferably from 25 to 50° C. The steps of this reaction are generally carried out under atmospheric pressure. However, it is also possible to carry them out under superatmospheric pressure or under reduced pressure (for example, in a range of from 0.5 to 5 bar). The reaction time can generally be varied within a relatively wide range. In general, the reaction is finished after a period of from 2 to 24 hours, preferably from 6 to 12 hours.
Synthetic transformations that may be employed in the synthesis of compounds of Formula I and in the synthesis of intermediates involved in the synthesis of compounds of Formula I are known by or accessible to one skilled in the art. Collections of synthetic transformations may be found in compilations, such as:

J. March. Advanced Organic Chemistry, 4th ed.; John Wiley: New York (1992)
R. C. Larock. Comprehensive Organic Transformations, 2nd ed.; Wiley-VCH: New York (1999)
F. A. Carey; R. J. Sundberg. Advanced Organic Chemistry, 2nd ed.; Plenum Press: New York (1984)
T. W. Greene; P. G. M. Wuts. Protective Groups in Organic Synthesis, 3rd ed.; John Wiley: New York (1999)
L. S. Hegedus. Transition Metals in the Synthesis of Complex Organic Molecules, 2nd ed.; University Science Books: Mill Valley, Calif. (1994)
L. A. Paquette, Ed. The Encyclopedia of Reagents for Organic Synthesis; John Wiley: New York (1994)
A. R. Katritzky; O. Meth-Cohn; C. W. Rees, Eds. Comprehensive Organic Functional Group Transformations; Pergamon Press: Oxford, UK (1995)
G. Wilkinson; F. G A. Stone; E. W. Abel, Eds. Comprehensive Organometallic Chemistry; Pergamon Press: Oxford, UK (1982)
B. M. Trost; I. Fleming. Comprehensive Organic Synthesis; Pergamon Press: Oxford, UK (1991)
A. R. Katritzky; C. W. Rees Eds. Comprehensive Heterocylic Chemistry; Pergamon Press: Oxford, UK (1984)
A. R. Katritzky; C. W. Rees; E. F. V. Scriven, Eds. Comprehensive Heterocylic Chemistry II; Pergamon Press: Oxford, UK (1996)
C. Hansch; P. G. Sammes; J. B. Taylor, Eds. Comprehensive Medicinal Chemistry: Pergamon Press: Oxford, UK (1990).

In addition, recurring reviews of synthetic methodology and related topics include Organic Reactions; John Wiley: New York; Organic Syntheses; John Wiley: New York; Reagents for Organic Synthesis: John Wiley: New York; The Total Synthesis of Natural Products; John Wiley: New York; The Organic Chemistry of Drug Synthesis; John Wiley: New York; Annual Reports in Organic Synthesis; Academic Press: San Diego Calif.; and Methoden der Organischen Chemie (Houben-Weyl); Thieme: Stuttgart, Germany. Furthermore, databases of synthetic transformations include Chemical Abstracts, which may be searched using either CAS OnLine or SciFinder, Handbuch der Organischen Chemie (Beilstein), which may be searched using SpotFire, and REACCS.
Compositions of the Compounds of this Invention
This invention also relates to pharmaceutical compositions containing one or more compounds of the present invention. These compositions can be utilized to achieve the desired pharmacological effect by administration to a patient in need thereof. A patient, for the purpose of this invention, is a mammal, including a human, in need of treatment for the particular condition or disease. Therefore, the present invention includes pharmaceutical compositions which are comprised of a pharmaceutically acceptable carrier and a pharmaceutically effective amount of a compound, or salt thereof, of the present invention. A pharmaceutically acceptable carrier is preferably a carrier which is relatively non-toxic and innocuous to a patient at concentrations consistent with effective activity of the active ingredient so that any side effects ascribable to the carrier do not vitiate the beneficial effects of the active ingredient. A pharmaceutically effective amount of compound is preferably that amount which produces a result or exerts an influence on the particular condition being treated. The compounds of the present invention can be administered with pharmaceutically-acceptable carriers well known in the art using any effective conventional dosage unit forms, including immediate, slow and timed release preparations, orally, parenterally, topically, nasally, ophthalmically, optically, sublingually, rectally, vaginally, and the like.
For oral administration, the compounds can be formulated into solid or liquid preparations such as capsules, pills, tablets, troches, lozenges, melts, powders, solutions, suspensions, or emulsions, and may be prepared according to methods known to the art for the manufacture of pharmaceutical compositions. The solid unit dosage forms can be a capsule which can be of the ordinary hard- or soft-shelled gelatin type containing, for example, surfactants, lubricants, and inert fillers such as lactose, sucrose, calcium phosphate, and corn starch.
In another embodiment, the compounds of this invention may be tableted with is conventional tablet bases such as lactose, sucrose and cornstarch in combination with binders such as acacia, corn starch or gelatin, disintegrating agents intended to assist the break-up and dissolution of the tablet following administration such as potato starch, alginic acid, corn starch, and guar gum, gum tragacanth, acacia, lubricants intended to improve the flow of tablet granulation and to prevent the adhesion of tablet material to the surfaces of the tablet dies and punches, for example talc, stearic acid, or magnesium, calcium or zinc stearate, dyes, coloring agents, and flavoring agents such as peppermint, oil of wintergreen, or cherry flavoring, intended to enhance the aesthetic qualities of the tablets and make them more acceptable to the patient. Suitable excipients for use in oral liquid dosage forms include dicalcium phosphate and diluents such as water and alcohols, for example, ethanol, benzyl alcohol, and polyethylene alcohols, either with or without the addition of a pharmaceutically acceptable surfactant, suspending agent or emulsifying agent. Various other materials may be present as coatings or to otherwise modify the physical form of the dosage unit. For instance tablets, pills or capsules may be coated with shellac, sugar or both.
Dispersible powders and granules are suitable for the preparation of an aqueous suspension. They provide the active ingredient in admixture with a dispersing or wetting agent, a suspending agent and one or more preservatives. Suitable dispersing or wetting agents and suspending agents are exemplified by those already mentioned above. Additional excipients, for example those sweetening, flavoring and coloring agents described above, may also be present.
The pharmaceutical compositions of this invention may also be in the form of oil-in-water emulsions. The oily phase may be a vegetable oil such as liquid paraffin or a mixture of vegetable oils. Suitable emulsifying agents may be (1) naturally occurring gums such as gum acacia and gum tragacanth, (2) naturally occurring phosphatides such as soy bean and lecithin, (3) esters or partial esters derived form fatty acids and hexitol anhydrides, for example, sorbitan monooleate, (4) condensation products of said partial esters with ethylene oxide, for example, polyoxyethylene sorbitan monooleate. The emulsions may also contain sweetening and flavoring agents.
Oily suspensions may be formulated by suspending the active ingredient in a vegetable oil such as, for example, arachis oil, olive oil, sesame oil or coconut oil, or in a mineral oil such as liquid paraffin. The oily suspensions may contain a thickening agent such as, for example, beeswax, hard paraffin, or cetyl alcohol. The suspensions may also contain one or more preservatives, for example, ethyl or n-propyl p-hydroxybenzoate; one or more coloring agents; one or more flavoring agents; and one or more sweetening agents such as sucrose or saccharin.
Syrups and elixirs may be formulated with sweetening agents such as, for example, glycerol, propylene glycol, sorbitol or sucrose. Such formulations may also contain a demulcent, and preservative, such as methyl and propyl parabens and flavoring and coloring agents.
The compounds of this invention may also be administered parenterally, that is, subcutaneously, intravenously, intraocularly, intrasynovially, intramuscularly, or interperitoneally, as injectable dosages of the compound in preferably a physiologically acceptable diluent with a pharmaceutical carrier which can be a sterile liquid or mixture of liquids such as water, saline, aqueous dextrose and related sugar solutions, an alcohol such as ethanol, isopropanol, or hexadecyl alcohol, glycols such as propylene glycol or polyethylene glycol, glycerol ketals such as 2,2-dimethyl-1,1-dioxolane-4-methanol, ethers such as poly(ethylene glycol) 400, an oil, a fatty acid, a fatty acid ester or, a fatty acid glyceride, or an acetylated fatty acid glyceride, with or without the addition of a pharmaceutically acceptable surfactant such as a soap or a detergent, suspending agent such as pectin, carbomers, methylcellulose, hydroxypropylmethylcellulose, or carboxymethylcellulose, or emulsifying agent and other pharmaceutical adjuvants.
Illustrative of oils which can be used in the parenteral formulations of this invention are those of petroleum, animal, vegetable, or synthetic origin, for example, peanut oil, soybean oil, sesame oil, cottonseed oil, corn oil, olive oil, petrolatum and is mineral oil. Suitable fatty acids include oleic acid, stearic acid, isostearic acid and myristic acid. Suitable fatty acid esters are, for example, ethyl oleate and isopropyl myristate. Suitable soaps include fatty acid alkali metal, ammonium, and triethanolamine salts and suitable detergents include cationic detergents, for example dimethyl dialkyl ammonium halides, alkyl pyridinium halides, and alkylamine acetates; anionic detergents, for example, alkyl, aryl, and olefin sulfonates, alkyl, olefin, ether, and monoglyceride sulfates, and sulfosuccinates; non-ionic detergents, for example, fatty amine oxides, fatty acid alkanolamides, and poly(oxyethylene-oxypropylene)s or ethylene oxide or propylene oxide copolymers; and amphoteric detergents, for example, alkyl-beta-aminopropionates, and 2-alkylimidazoline quarternary ammonium salts, as well as mixtures.
The parenteral compositions of this invention will typically contain from about 0.5% to about 25% by weight of the active ingredient in solution. Preservatives and buffers may also be used advantageously. In order to minimize or eliminate irritation at the site of injection, such compositions may contain a non-ionic surfactant having a hydrophile-lipophile balance (HLB) preferably of from about 12 to about 17. The quantity of surfactant in such formulation preferably ranges from about 5% to about 15% by weight. The surfactant can be a single component having the above HLB or can be a mixture of two or more components having the desired HLB.
Illustrative of surfactants used in parenteral formulations are the class of polyethylene sorbitan fatty acid esters, for example, sorbitan monooleate and the high molecular weight adducts of ethylene oxide with a hydrophobic base, formed by the condensation of propylene oxide with propylene glycol.
The pharmaceutical compositions may be in the form of sterile injectable aqueous suspensions. Such suspensions may be formulated according to known methods using suitable dispersing or wetting agents and suspending agents such as, for example, sodium carboxymethylcellulose, methylcellulose, hydroxypropylmethyl-cellulose, sodium alginate, polyvinylpyrrolidone, gum tragacanth and gum acacia; dispersing or wetting agents which may be a naturally occurring phosphatide such as lecithin, a condensation product of an alkylene oxide with a fatty acid, for example, polyoxyethylene stearate, a condensation product of ethylene oxide with a long chain aliphatic alcohol, for example, heptadeca-ethyleneoxycetanol, a condensation product of ethylene oxide with a partial ester derived form a fatty acid and a hexitol such as polyoxyethylene sorbitol monooleate, or a condensation product of an ethylene oxide with a partial ester derived from a fatty acid and a hexitol anhydride, for example polyoxyethylene sorbitan monooleate.
The sterile injectable preparation may also be a sterile injectable solution or suspension in a non-toxic parenterally acceptable diluent or solvent. Diluents and solvents that may be employed are, for example, water, Ringer's solution, isotonic sodium chloride solutions and isotonic glucose solutions. In addition, sterile fixed oils are conventionally employed as solvents or suspending media. For this purpose, any bland, fixed oil may be employed including synthetic mono- or diglycerides. In addition, fatty acids such as oleic acid can be used in the preparation of injectables.
A composition of the invention may also be administered in the form of suppositories for rectal administration of the drug. These compositions can be prepared by mixing the drug with a suitable non-irritation excipient which is solid at ordinary temperatures but liquid at the rectal temperature and will therefore melt in the rectum to release the drug. Such material are, for example, cocoa butter and polyethylene glycol.
Another formulation employed in the methods of the present invention employs transdermal delivery devices (“patches”). Such transdermal patches may be used to provide continuous or discontinuous infusion of the compounds of the present invention in controlled amounts. The construction and use of transdermal patches for the delivery of pharmaceutical agents is well known in the art (see, e.g., U.S. Pat. No. 5,023,252, issued Jun. 11, 1991, incorporated herein by reference). Such patches may be constructed for continuous, pulsatile, or on demand delivery of pharmaceutical agents.
Controlled release formulations for parenteral administration include liposomal, polymeric microsphere and polymeric gel formulations which are known in the art.
It may be desirable or necessary to introduce the pharmaceutical composition to the patient via a mechanical delivery device. The construction and use of mechanical delivery devices for the delivery of pharmaceutical agents is well known in the art. Direct techniques for, for example, administering a drug directly to the brain usually involve placement of a drug delivery catheter into the patient's ventricular system to bypass the blood-brain barrier. One such implantable delivery system, used for the transport of agents to specific anatomical regions of the body, is described in U.S. Pat. No. 5,011,472, issued Apr. 30, 1991.
The compositions of the invention can also contain other conventional pharmaceutically acceptable compounding ingredients, generally referred to as carriers or diluents, as necessary or desired. Conventional procedures for preparing such compositions in appropriate dosage forms can be utilized. Such ingredients and procedures include those described in the following references, each of which is incorporated herein by reference: Powell, M. F. et al, “Compendium of Excipients for Parenteral Formulations” PDA Journal of Pharmaceutical Science & Technology 1998, 52(5), 238-311; Strickley, R. G “Parenteral Formulations of Small Molecule Therapeutics Marketed in the United States (1999)-Part-1” PDA Journal of Pharmaceutical Science & Technology 1999, 53(6), 324-349; and Nema, S. et al, “Excipients and Their Use in Injectable Products” PDA Journal of Pharmaceutical Science & Technology 1997, 51(4), 166-171.
Commonly used pharmaceutical ingredients which can be used as appropriate to formulate the composition for its intended route of administration include:
acidifying agents (examples include but are not limited to acetic acid, citric acid, fumaric acid, hydrochloric acid, nitric acid);
alkalinizing agents (examples include but are not limited to ammonia solution, ammonium carbonate, diethanolamine, monoethanolamine, potassium hydroxide, sodium borate, sodium carbonate, sodium hydroxide, triethanolamine, trolamine);
adsorbents (examples include but are not limited to powdered cellulose and activated charcoal);
aerosol propellants (examples include but are not limited to carbon dioxide, CCl₂F₂, F₂ClC—CClF₂and CClF₃)
air displacement agents (examples include but are not limited to nitrogen and argon);
antifungal preservatives (examples include but are not limited to benzoic acid, butylparaben, ethylparaben, methylparaben, propylparaben, sodium benzoate);
antimicrobial preservatives (examples include but are not limited to benzalkonium chloride, benzethonium chloride, benzyl alcohol, cetylpyridinium chloride, chlorobutanol, phenol, phenylethyl alcohol, phenylmercuric nitrate and thimerosal);
antioxidants (examples include but are not limited to ascorbic acid, ascorbyl palmitate, butylated hydroxyanisole, butylated hydroxytoluene, hypophosphorus acid, monothioglycerol, propyl gallate, sodium ascorbate, sodium bisulfite, sodium formaldehyde sulfoxylate, sodium metabisulfite);
binding materials (examples include but are not limited to block polymers, natural and synthetic rubber, polyacrylates, polyurethanes, silicones, polysiloxanes and styrene-butadiene copolymers);
buffering agents (examples include but are not limited to potassium metaphosphate, dipotassium phosphate, sodium acetate, sodium citrate anhydrous and sodium citrate dihydrate)
carrying agents (examples include but are not limited to acacia syrup, aromatic syrup, aromatic elixir, cherry syrup, cocoa syrup, orange syrup, syrup, corn oil, mineral oil, peanut oil, sesame oil, bacteriostatic sodium chloride injection and bacteriostatic water for injection)
chelating agents (examples include but are not limited to edetate disodium and edetic acid)
colorants (examples include but are not limited to FD&C Red No. 3, FD&C Red No. 20, FD&C Yellow No. 6, FD&C Blue No. 2, D&C Green No. 5, D&C Orange No. 5, D&C Red No. 8, caramel and ferric oxide red);
clarifying agents (examples include but are not limited to bentonite);
emulsifying agents (examples include but are not limited to acacia, cetomacrogol, cetyl alcohol, glyceryl monostearate, lecithin, sorbitan monooleate, polyoxyethylene 50 monostearate);
encapsulating agents (examples include but are not limited to gelatin and cellulose acetate phthalate)
flavorants (examples include but are not limited to anise oil, cinnamon oil, cocoa, menthol, orange oil, peppermint oil and vanillin);
humectants (examples include but are not limited to glycerol, propylene glycol and sorbitol);
levigating agents (examples include but are not limited to mineral oil and glycerin);
oils (examples include but are not limited to arachis oil, mineral oil, olive oil, peanut oil, sesame oil and vegetable oil);
ointment bases (examples include but are not limited to lanolin, hydrophilic ointment, polyethylene glycol ointment, petrolatum, hydrophilic petrolatum, white ointment, yellow ointment, and rose water ointment);
penetration enhancers (transdermal delivery) (examples include but are not limited to monohydroxy or polyhydroxy alcohols, mono- or polyvalent alcohols, saturated or unsaturated fatty alcohols, saturated or unsaturated fatty esters, saturated or unsaturated dicarboxylic acids, essential oils, phosphatidyl derivatives, cephalin, terpenes, amides, ethers, ketones and ureas)
plasticizers (examples include but are not limited to diethyl phthalate and glycerol);
solvents (examples include but are not limited to ethanol, corn oil, cottonseed oil, glycerol, isopropanol, mineral oil, oleic acid, peanut oil, purified water, water for injection, sterile water for injection and sterile water for irrigation);
stiffening agents (examples include but are not limited to cetyl alcohol, cetyl esters wax, microcrystalline wax, paraffin, stearyl alcohol, white wax and yellow wax);
suppository bases (examples include but are not limited to cocoa butter and polyethylene glycols (mixtures));
surfactants (examples include but are not limited to benzalkonium chloride, nonoxynol 10, oxtoxynol 9, polysorbate 80, sodium lauryl sulfate and sorbitan mono-palmitate);
suspending agents (examples include but are not limited to agar, bentonite, carbomers, carboxymethylcellulose sodium, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methylcellulose, kaolin, methylcellulose, tragacanth and veegum);
sweetening agents (examples include but are not limited to aspartame, dextrose, glycerol, mannitol, propylene glycol, saccharin sodium, sorbitol and sucrose);
tablet anti-adherents (examples include but are not limited to magnesium stearate and talc);
tablet binders (examples include but are not limited to acacia, alginic acid, carboxymethylcellulose sodium, compressible sugar, ethylcellulose, gelatin, liquid glucose, methylcellulose, non-crosslinked polyvinyl pyrrolidone, and pregelatinized starch);
tablet and capsule diluents (examples include but are not limited to dibasic calcium phosphate, kaolin, lactose, mannitol, microcrystalline cellulose, powdered cellulose, precipitated calcium carbonate, sodium carbonate, sodium phosphate, sorbitol and starch);
tablet coating agents (examples include but are not limited to liquid glucose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methylcellulose, methylcellulose, ethylcellulose, cellulose acetate phthalate and shellac);
tablet direct compression excipients (examples include but are not limited to dibasic calcium phosphate);
tablet disintegrants (examples include but are not limited to alginic acid, carboxymethylcellulose calcium, microcrystalline cellulose, polacrilin potassium, cross-linked polyvinylpyrrolidone, sodium alginate, sodium starch glycollate and starch);
tablet glidants (examples include but are not limited to colloidal silica, corn starch and talc);
tablet lubricants (examples include but are not limited to calcium stearate, magnesium stearate, mineral oil, stearic acid and zinc stearate);
tablet/capsule opaquants (examples include but are not limited to titanium dioxide);
tablet polishing agents (examples include but are not limited to carnuba wax and white wax);
thickening agents (examples include but are not limited to beeswax, cetyl alcohol and paraffin);
tonicity agents (examples include but are not limited to dextrose and sodium chloride);
viscosity increasing agents (examples include but are not limited to alginic acid, bentonite, carbomers, carboxymethylcellulose sodium, methylcellulose, polyvinyl pyrrolidone, sodium alginate and tragacanth); and
wetting agents (examples include but are not limited to heptadecaethylene oxycetanol, lecithins, sorbitol monooleate, polyoxyethylene sorbitol monooleate, and polyoxyethylene stearate).
Pharmaceutical compositions according to the present invention can be illustrated as follows:
Sterile IV Solution: A 5 mg/ml solution of the desired compound of this invention can be made using sterile, injectable water, and the pH is adjusted if necessary. The solution is diluted for administration to 1-2 mg/ml with sterile 5% dextrose and is administered as an IV infusion over 60 minutes.
Lyophilized powder for IV administration: A sterile preparation can be prepared with (i) 100-1000 mg of the desired compound of this invention as a lyophilized powder, (ii) 32-327 mg/ml sodium citrate, and (iii) 300-3000 mg Dextran 40. The formulation is reconstituted with sterile, injectable saline or dextrose 5% to a concentration of 10 to 20 mg/ml, which is further diluted with saline or dextrose 5% to 0.2-0.4 mg/ml, and is administered either IV bolus or by IV infusion over 15-60 minutes.
Intramuscular suspension: The following solution or suspension can be prepared, for intramuscular injection:
50 mg/ml of the desired, water-insoluble compound of this invention
5 mg/ml sodium carboxymethylcellulose
4 mg/ml TWEEN 80
9 mg/ml sodium chloride
9 mg/ml benzyl alcohol
Hard Shell Capsules: A large number of unit capsules are prepared by filling standard two-piece hard galantine capsules each with 100 mg of powdered active ingredient, 150 mg of lactose, 50 mg of cellulose and 6 mg of magnesium stearate.
Soft Gelatin Capsules: A mixture of active ingredient in a digestible oil such as soybean oil, cottonseed oil or olive oil is prepared and injected by means of a positive displacement pump into molten gelatin to form soft gelatin capsules containing 100 mg of the active ingredient. The capsules are washed and dried. The active ingredient can be dissolved in a mixture of polyethylene glycol, glycerin and sorbitol to prepare a water miscible medicine mix.
Tablets: A large number of tablets are prepared by conventional procedures so that the dosage unit is 100 mg of active ingredient, 0.2 mg. of colloidal silicon dioxide, 5 mg of magnesium stearate, 275 mg of microcrystalline cellulose, 11 mg. of starch, and 98.8 mg of lactose. Appropriate aqueous and non-aqueous coatings may be applied to increase palatability, improve elegance and stability or delay absorption.
Immediate Release Tablets/Capsules: These are solid oral dosage forms made by conventional and novel processes. These units are taken orally without water for immediate dissolution and delivery of the medication. The active ingredient is mixed in a liquid containing ingredient such as sugar, gelatin, pectin and sweeteners. These liquids are solidified into solid tablets or caplets by freeze drying and solid state extraction techniques. The drug compounds may be compressed with viscoelastic and thermoelastic sugars and polymers or effervescent components to produce porous matrices intended for immediate release, without the need of water.

Method of Treating Hyper-Proliferative Disorders

The present invention relates to a method for using the compounds described above (Compounds of Formula I), including salts and esters thereof and compositions thereof, to treat mammalian hyper-proliferative disorders. This method comprises administering to a mammal in need thereof, including a human, an amount of a compound of this invention, or a pharmaceutically acceptable salt or ester thereof, which is effective to treat the disorder. Hyper-proliferative disorders include but are not limited to solid tumors, such as cancers of the breast, respiratory tract, brain, reproductive organs, digestive tract, urinary tract, eye, liver, skin, head and neck, thyroid, parathyroid and their distant metastases. Those disorders also include lymphomas, sarcomas, and leukemias.
Examples of breast cancer include, but are not limited to invasive ductal carcinoma, invasive lobular carcinoma, ductal carcinoma in situ, and lobular carcinoma in situ.
Examples of cancers of the respiratory tract include, but are not limited to small-cell and non-small-cell lung carcinoma, as well as bronchial adenoma and pleuropulmonary blastoma.
Examples of brain cancers include, but are not limited to brain stem and hypothalamic glioma, cerebellar and cerebral astrocytoma, medulloblastoma, ependymoma, as well as neuroectodermal and pineal tumor.
Tumors of the male reproductive organs include, but are not limited to prostate and testicular cancer. Tumors of the female reproductive organs include, but are not limited to endometrial, cervical, ovarian, vaginal, and vulvar cancer, as well as sarcoma of the uterus.
Tumors of the digestive tract include, but are not limited to anal, colon, colorectal, esophageal, gallbladder, gastric, pancreatic, rectal, small-intestine, and salivary gland cancers.
Tumors of the urinary tract include, but are not limited to bladder, penile, kidney, renal pelvis, ureter, and urethral cancers.
Eye cancers include, but are not limited to intraocular melanoma and retinoblastoma.
Examples of liver cancers include, but are not limited to hepatocellular carcinoma (liver cell carcinomas with or without fibrolamellar variant), cholangiocarcinoma (intrahepatic bile duct carcinoma), and mixed hepatocellular cholangiocarcinoma.
Skin cancers include, but are not limited to squamous cell carcinoma, Kaposi's sarcoma, malignant melanoma, Merkel cell skin cancer, and non-melanoma skin cancer.
Head-and-neck cancers include, but are not limited to laryngeal/hypopharyngeal/nasopharyngeal/oropharyngeal cancer, and lip and oral cavity cancer.
Lymphomas include, but are not limited to AIDS-related lymphoma, non-Hodgkin's lymphoma, cutaneous T-cell lymphoma, Hodgkin's disease, and lymphoma of the central nervous system.
Sarcomas include, but are not limited to sarcoma of the soft tissue, osteosarcoma, malignant fibrous histiocytoma, lymphosarcoma, and rhabdomyosarcoma.
Leukemias include, but are not limited to acute myeloid leukemia, acute lymphoblastic leukemia, chronic lymphocytic leukemia, chronic myelogenous leukemia, and hairy cell leukemia.
These disorders have been well characterized in humans, but also exist with a similar etiology in other mammals, and can be treated by administering pharmaceutical compositions of the present invention.
Based upon standard laboratory techniques known to evaluate compounds useful for the treatment of hyper-proliferative disorders, by standard toxicity tests and by standard pharmacological assays for the determination of treatment of the conditions identified above in mammals, and by comparison of these results with the results of known medicaments that are used to treat these conditions, the effective dosage of the compounds of this invention can readily be determined for treatment of each desired indication. The amount of the active ingredient to be administered in the treatment of one of these conditions can vary widely according to such considerations as the particular compound and dosage unit employed, the mode of administration, the period of treatment, the age and sex of the patient treated, and the nature and extent of the condition treated.
The total amount of the active ingredient to be administered will generally range from about 0.001 mg/kg to about 200 mg/kg body weight per day, and preferably from about 0.01 mg/kg to about 20 mg/kg body weight per day. It should be noted that the choice of dosing schedules is particularly important to maximize the efficacy and safety of drugs for the treatment of proliferative disorders such as cancer. Clinically useful dosing schedules will range from three times a day dosing to once every four weeks dosing. In addition, “drug holidays” in which a patient is not dosed with a drug for a certain period of time, may be beneficial to the overall balance between pharmacological effect and tolerability. A unit dosage may contain from about 0.5 mg to about 1500 mg of active ingredient, and can be administered one or more times per day or less than once a day. The average daily dosage for administration by injection, including intravenous, intramuscular, subcutaneous and parenteral injections, and use of infusion techniques will preferably be from 0.01 to 200 mg/kg of total body weight. The average daily rectal dosage regimen will preferably be from 0.01 to 200 mg/kg of total body weight. The average daily vaginal dosage regimen will preferably be from 0.01 to 200 mg/kg of total body weight. The average daily topical dosage regimen will preferably be from 0.1 to 200 mg administered between one to four times daily. The transdermal concentration will preferably be that required to maintain a daily dose of from 0.01 to 200 mg/kg. The average daily inhalation dosage regimen will preferably be from 0.01 to 100 mg/kg of total body weight.
Of course the specific initial and continuing dosage regimen for each patient will vary according to the nature and severity of the condition as determined by the attending diagnostician, the activity of the specific compound employed, the age and general condition of the patient, time of administration, route of administration, rate of excretion of the drug, drug combinations, and the like. The desired mode of treatment and number of doses of a compound of the present invention or a pharmaceutically acceptable salt or ester or composition thereof can be ascertained by those skilled in the art using conventional treatment tests.
The compounds of this invention can be administered as the sole pharmaceutical agent or in combination with one or more other pharmaceutical agents where the combination causes no unacceptable adverse effects. For example, the compounds of this invention can be combined with known anti-hyper-proliferative or other indication agents, and the like, as well as with admixtures and combinations thereof.
Optional anti-hyper-proliferative agents which can be added to the composition include but are not limited to compounds listed on the cancer chemotherapy drug regimens in the 11^thEdition of the Merck Index, (1996), which is hereby incorporated by reference, such as asparaginase, bleomycin, carboplatin, carmustine, chlorambucil, cisplatin, colaspase, cyclophosphamide, cytarabine, dacarbazine, dactinomycin, daunorubicin, doxorubicin (adriamycine), epirubicin, etoposide, 5-fluorouracil, hexamethylmelamine, hydroxyurea, ifosfamide, irinotecan, leucovorin, lomustine, mechlorethamine, 6-mercaptopurine, mesna, methotrexate, mitomycin C, mitoxantrone, prednisolone, prednisone, procarbazine, raloxifene, streptozocin, tamoxifen, thioguanine, topotecan, vinblastine, vincristine, and vindesine.
Other anti-hyper-proliferative agents suitable for use with the composition of the invention include but are not limited to those compounds acknowledged to be used in the treatment of neoplastic diseases in Goodman and Gilman's The Pharmacological Basis of Therapeutics (Ninth Edition), editor Molinoff et al., publ. by McGraw-Hill, pages 1225-1287, (1996), which is hereby incorporated by reference, such as aminoglutethimide, L-asparaginase, azathioprine, 5-azacytidine cladribine, busulfan, diethylstilbestrol, 2′,2′-difluorodeoxycytidine, docetaxel, erythrohydroxynonyladenine, ethinyl estradiol, 5-fluorodeoxyuridine, 5-fluorodeoxyuridine monophosphate, fludarabine phosphate, fluoxymesterone, flutamide, hydroxyprogesterone caproate, idarubicin, interferon, medroxyprogesterone acetate, megestrol acetate, melphalan, mitotane, paclitaxel, pentostatin, N-phosphonoacetyl-L-aspartate (PALA), plicamycin, semustine, teniposide, testosterone propionate, thiotepa, trimethylmelamine, uridine, and vinorelbine.
Other anti-hyper-proliferative agents suitable for use with the composition of the invention include but are not limited to other anti-cancer agents such as epothilone and its derivatives, irinotecan, raloxifene and topotecan.
Generally, the use of cytotoxic and/or cytostatic agents in combination with a compound or composition of the present invention will serve to:
(1) yield better efficacy in reducing the growth of a tumor or even eliminate the tumor as compared to administration of either agent alone,
(2) provide for the administration of lesser amounts of the administered chemotherapeutic agents,
(3) provide for a chemotherapeutic treatment that is well tolerated in the patient with fewer deleterious pharmacological complications than observed with single agent chemotherapies and certain other combined therapies,
(4) provide for treating a broader spectrum of different cancer types in mammals, especially humans,
(5) provide for a higher response rate among treated patients,
(6) provide for a longer survival time among treated patients compared to standard chemotherapy treatments,
(7) provide a longer time for tumor progression, and/or
(8) yield efficacy and tolerability results at least as good as those of the agents used alone, compared to known instances where other cancer agent combinations produce antagonistic effects.

Preparation of Synthetic Intermediates

Abbreviations Used in this Specification

DBU 1,8-diazabicyclo[5.4.0]undec-7-ene
DMF N,N-dimethyl formamide
DCM Dichloromethane
DCE 1,2-dichloroethane
DMSO dimethyl sulphoxide
HPLC High pressure liquid chromatography
MPLC Medium pressure liquid chromatography
LC-MS liquid chromatography-coupled mass spectroscopy
RT retention time
MP melting point
NMR nuclear resonance spectroscopy
TLC thin layer chromatography
ES electrospray
DMA N,N-dimethylacetamide
HRMS high resolution mass spectroscopy
CDI 1,1′-carbonyldiimidazole
HOBT 1-hydroxybenzotriazole
EDCl 1-[3-(dimethylamino) propyl]-3-ethylcarbodiimide hydrochloride
TMSCl Trimethylsilyl chloride
m-CPBA 3-chloroperbenzoic acid
HEPES N-(2-hydroxyethyl)-piperazine-N′-(2-ethane sulphonic acid)
Tris/hydrochloric acid tris(hydroxymethyl)-aminomethane hydrochloride
™Triton X-100® tert.-octyl-phenoxypolyethoxyethanol, Rohm & Haas, USA

The yield percentages of the following examples refer to the starting component which was used in the lowest molar amount.
LC-MS conditions: HPLC-electrospray mass spectra (HPLC ES-MS) were obtained using a Gilson HPLC system equipped with two Gilson 306 pumps, a Gilson 215 Autosampler, a Gilson diode array detector, a YMC Pro C-18 column (2×23 mm, 120 A), and a Micromass LCZ single quadrupole mass spectrometer with z-spray electrospray ionization. Spectra were scanned from 120-1000 amu over 2 seconds. ELSD (Evaporative Light Scattering Detector) data was also acquired as an analog channel. Gradient elution was used with Buffer A as 2% acetonitrile in water with 0.02% TFA and Buffer B as 2% water in Acetonitrile with 0.02% TFA at 1.5 mL/min. Samples were eluted as follows: 90% A for 0.5 minutes ramped to 95% B over 3.5 minutes and held at 95% B for 0.5 minutes and then the column is brought back to initial conditions over 0.1 minutes. Total run time is 4.8 minutes.
Preparative HPLC: Preparative HPLC was obtained using a Gilson HPLC system equipped with two Gilson 322 pumps, a Gilson 215 Autosampler, a Gilson diode array detector, a YMC Pro C-18 column (20×150 mm, 120 A). Gradient elution was used with Buffer A as water with 0.1% TFA and Buffer B as acetonitrile with 0.1% TFA. Sample was dissolved in MeOH or MeOH/DMSO with concentration about 50 mg/ml. Injection volume was about 2-3 mL/injection. Sample was eluted as follows: 10-90% B over 15 minutes with flow rate of 25 mL/min, hold 2 minutes, back to 10% B. Desired fraction was collected with UV at 254 or 220 nm and evaporated with GeneVac speed vacuum.

Preparation of 4-(4-Amino-phenoxy)pyridine-2-carboxylic acid methyl ester

Step 1: Preparation of 4-Chloropyridine-2-carbonyl chloride hydrochloride

Anhydrous DMF (6.0 mL) was slowly added to SOCl₂(180 mL) between 40° C. and 50° C. The solution was stirred in that temperature range for 10 min., then picolinic acid (60.0 g, 487 mmol) was added in portions over 30 min. The resulting solution was heated at 72° C. for 16 h to generate a yellow solid precipitate. The resulting mixture was cooled to RT, diluted with toluene (500 mL) and concentrated to half its volume. The resulting residue was filtered and the solids were washed with toluene and dried under high vacuum for 4 h to afford 4-chloropyridine-2-carbonyl chloride HCl salt as a yellow solid (92.0 g, 89%).

Step 2: Preparation of 4-Chloropyridine-2-carboxylic acid methylamide

A suspension of methyl 4-chloropyridine-2-carboxylate HCl salt (89.0 g, 428 mmol) in MeOH (75 mL) at 0° C. was treated with a 2.0 M methylamine solution in THF (1 L). The resulting mixture was stored at 3° C. for 5 h, then concentrated under reduced pressure. The resulting solids were suspended in EtOAc (1 L) and filtered. The filtrate was washed with a saturated NaCl solution (500 mL), dried over Na₂SO₄, and concentrated under reduced pressure to afford 4-chloro-N-methyl-2-pyridinecarboxamide as pale-yellow crystals (71.2 g, 97%). ¹H-NMR (DMSO-d₆) δ 2.81 (s, 3H), 7.74 (dd, J=5.1, 2.2 Hz, 1H), 8.00 (d, J=2.2 Hz, 1H), 8.61 (d, J=5.1 Hz, 1H), 8.85 (br d, 1H); Cl-MS m/z 171 (MH⁺); m.p. 41-43° C.

Step 3: Preparation of 4-(4-Aminophenoxy)pyridine-2-carboxylic acid methylamide

A solution of 4-aminophenol (9.60 g, 88.0 mmol) in anhydrous DMF (150 mL) was treated with potassium tert-butoxide (10.29 g, 91.7 mmol), and the reddish-brown mixture was stirred at RT for 2 h. The contents were treated with 4-chloropyridine-2-carboxylic acid methylamide (15.0 g, 87.9 mmol) and K₂CO₃(6.50 g, 47.0 mmol) and then heated at 80° C. for 8 h. The mixture was cooled to RT and partitioned between EtOAc (500 mL) and a saturated NaCl solution (500 mL). The aqueous phase was back-extracted with EtOAc (300 mL). The combined organic layers were washed with brine, dried over Na₂SO₄, and concentrated under reduced pressure. The resulting solids were dried under reduced pressure at 35° C. for 3 h to afford the title compound (17.9 g, 84%) as a light-brown solid. ¹H-NMR (DMSO-d₆) δ 2.77 (d, J=4.8 Hz, 3H), 5.17 (br s, 2H), 6.64, 6.86 (AA′BB′ quartet, J=8.4 Hz, 4H), 7.06 (dd, J=5.5, 2.5 Hz, 1H), 7.33 (d, J=2.5 Hz, 1H), 8.44 (d, J=5.5 Hz, 1H), 8.73 (br d, 1H); HPLC ES-MS m/z 244 (MH⁺).

Step 4: Preparation of the title compound 4-(4-Amino-phenoxy)pyridine-2-carboxylic acid methyl ester

A mixture of 4-(4-aminophenoxy)pyridine-2-carboxylic acid methylamide (15.0 g, 61.7 mmol) and potassium hydroxide (34.6 g, 617 mmol) in ethanol (400 mL) and water (40 mL) was stirred at 90° C. for 48 h. After cooling to RT, 2.0 N hydrochloric acid was slowly added to the reaction mixture until pH=5. The solvent was removed completely and the residue redissolved in MeOH (400 mL). After slow addition of trimethylsilylchloride (178 mL, 140 mmol, 2.27 eq) at 0° C., the reaction mixture was stirred at reflux for 24 h and cooled to RT. The mixture was filtered, and the filtrate concentrated under reduced pressure and then partitioned between DCM and water. The organic layer was then washed with 1M aqueous sodium bicarbonate solution, dried over Na₂SO₄, filtered, and evaporated under reduced pressure. The resulting residue was washed further with H₂O and reextracted with EtOAc/Hex (1:2 v/v) to afford the desired ester (6.27 g, 42%) as a light brown solid. ¹H-NMR (DMSO-d₆) δ 8.51 (d, J=5.7 Hz, 1H), 7.35 (d, J=2.4 Hz, 1H), 7.10 (dd, J=5.7, 2.7 Hz, 1H), 6.86 (dt, J=9.0, 2.4 Hz, 2H), 6.63 (dt, J=8.7, 2.4 Hz, 2H), 5.18 (br s, 2H), 3.86 (s, 3H); MS LC-MS [M+H]⁺=245, RT=1.04 min; TLC (75% EtOAc/hex), R_f=0.20.

Preparation of 4-(3-Aminophenoxy)pyridine-2-carboxylic acid

Step 1: Preparation of 4-(3-Aminophenoxy)pyridine-2-carboxylic acid methylamide

The title compound was prepared in the same manner described for 4-(4-aminophenoxy)pyridine-2-carboxylic acid methylamide, substituting 3-aminophenol for 4-aminophenol. ¹H-NMR (DMSO-d₆) δ 8.75 (br q, J=4.8 Hz, 1H), 8.48 (d, J=6.3 Hz, 1H), 7.39 (d, J=2.1 Hz, 1H), 7.15 to 7.07 (m, 2H), 5.51 to 6.47 (m, 1H), 6.31 to 6.24 (m, 2H), 5.40 (s, 2H), 2.77 (d, J=5.1 Hz, 3H).

Step 2: Preparation of the title compound 4-(3-Aminophenoxy)pyridine-2-carboxylic acid

A mixture of 4-(3-aminophenoxy)pyridine-2-carboxylic acid methylamide (5.64 g, 23.81 mmol) and potassium hydroxide (13.01 g, 232 mmol) in EtOH/H₂O (55 mL, 10:1) was stirred at 90° C. for 48 h. The mixture was concentrated in vacuo, and the crude residue was dissolved in H₂O (100 mL). The solution was carefully adjusted to pH=6-7 with aq. 1N HCl, and the resultant precipitate was filtered. The filtrate was then concentrated in vacuo, and the crude material was diluted with MeOH (150 mL), and the solid was collected. The combined filtered solids were washed with CH₂Cl₂to give 5.25 g (98%) of 4-(3-amino-phenoxy)pyridine-2-carboxylic acid. ¹H-NMR (CD₃OD) δ 8.45 (d, 1H), 7.60 (d, 1H), 7.17 (t, 1H), 7.09 (d, 1H), 6.64 (dd, 1H), 6.47-6.45 (m, 1H), 6.40 (dd, 1H); MS LC-MS [M+H]⁺=231.

Preparation of 4-(3-Aminophenoxy)pyridine-2-carboxylic acid methyl ester

To a 0° C. MeOH solution (100 mL) containing TMSCl (4.72 g, 43.4 mmol) was slowly added 4-(3-aminophenoxy)pyridine-2-carboxylic acid (0.5 g, 2.17 mmol) in MeOH (5 mL), and the reaction mixture heated to reflux for 12 h. The solvent was removed in is vacuo, and residue partitioned between CH₂Cl₂and H₂O. The organic layer was dried over Na₂SO₄, filtered, and concentrated in vacuo. The crude residue was purified by silica gel chromatography eluting with hexanes/EtOAc (gradient—3/7 to 2/3) to obtain the desired product, 0.25 g (48%). ¹H-NMR (CD₃OD) δ 8.49 (d, 1H), 7.20 (d, 1H), 7.14 (dd, 1H), 6.64 (dd, 1H), 6.45 (t, 1H), 6.40 (dd, 1H), 3.92 (s, 3H); MS LC-MS [M+H]⁺=245.1, RT=0.52 min.

Preparation of 4-(2-[1,3,4]-Oxadiazol-2-yl-pyridin-4-yloxy)phenylamine

Step 1: Preparation of 4-chloropyridine-2-carboxylic acid methyl ester

A mixture of 4-chloropyridine-2-carbonyl chloride HCl (1.75 g, 8.22 mmol) and triethylamine (3.8 mL, 24.14 mmol, 3.3 eq) in THF (16 mL) and MeOH (4 mL) was stirred at 0° C. for 2 h until all of the SM has been consumed. The solvent was concentrated under reduced pressure, and the resultant crude material was purified using MPLC (biotage) eluted with 25 to 50% EtOAc-hexane to afford 878 mg (60.7%) of the methyl ester as a light tan crystalline solid. ¹H-NMR (DMSO-d₆) δ 8.69 (d, J=5.4 Hz, 1H), 8.07 (d, J=2.1 Hz, 1H), 7.82 (dd, J=5.4, 2.1 Hz, 1H), 3.89 (s, 3H); TLC (50% EtOAc/Hex), R_f=0.40.

Step 2: Preparation of 4-Chloropyridine-2-carboxylic acid hydrazide

To 4-chloro-pyridine-2-carboxylic acid methyl (850 mg, 4.95 mmol) in anhydrous MeOH (50 mL) was added hydrazine hydrate (2.48 g, 49.5 mmol) dropwise, and the reaction mixture was stirred under argon at RT for 18 h. The mixture was diluted with EtOAc (200 mL), and the organic layer was washed with water and brine, dried over Na₂SO₄, filtered, and concentrated under reduce pressure. Recrystallization from MeOH afforded 500 mg (59%) of 4-chloropyridine-2-carboxylic acid hydrazide. ¹H-NMR (Acetone-d₆) δ 9.38 (s, 1H), 8.60 (d, 1H), 8.08 (d, 1H), 7.64 (dd, 1H), 4.46 (s, 2H); MS LC-MS [M+H]⁺=172, RT=0.86 min; TLC (100% EtOAc), R_f=0.35.

Step 3: Preparation of 4-Chloro-2-[1,3,4]oxadiazol-2-yl-pyridine

A mixture of 4-chloro-pyridine-2-carboxylic acid hydrazide (550 mg, 2.91 mmol) in triethyl orthoformate (10 mL) was refluxed under argon for 48 h. The mixture was diluted with EtOAc (200 mL), and the organic layer was washed with water and brine, dried over Na₂SO₄, filtered, and concentrated under reduce pressure. The crude residue was purified by flash chromatography eluted with 50% EtOAc/Hex to give 360 mg (68%) of 4-chloro-2-[1,3,4]oxadiazol-2-yl-pyridine. ¹H-NMR (Acetone-d₆) δ 9.16 (s, 1H), 8.76 (d, 1H), 8.26 (d, 1H), 7.74 (dd, 1H); MS LC-MS [M+H]⁺=182, RT=1.36 min; TLC (100% EtOAc), R_f=0.70

Step 4: Preparation of the title compound 4-(2-[1,3,4]-Oxadiazol-2-yl-pyridin-4-yloxy)phenylamine

The title compound was prepared in the same manner as 4-(4-aminophenoxy)pyridine-2-carboxylic acid methylamide mentioned above, substituting 4-chloro-2-[1,3,4]oxadiazol-2-yl-pyridine for 4-chloropyridine-2-carboxylic acid. ¹H-NMR (Acetone-d₆) δ 9.04 (s, 1H), 8.59 (d, J=6.0 Hz, 1H), 7.62 (d, J=2.4 Hz, 1H), 7.06 (dd, J=2.4 Hz, 5.7 Hz, 1H), 6.96 (d, J=6.9 Hz, 2H), 6.78 (d, J=6.9 Hz, 2H), 4.81 (s, 2H); MS LC-MS [M+H]⁺=255, RT=0.95 min; TLC (100% EtOAc)=0.55.

Preparation of N-[4-Chloro-3-(trifluoromethyl)phenyl]-N′-{4-[(2-cyanopyridin-4-yl)oxy]phenyl}urea

Step 1: Preparation of N-[4-Chloro-3-(trifluoromethyl)phenyl]-N′-[4-(pyridin-4-yloxy)phenyl]-urea

To a solution of 4-(4-aminophenoxy)pyridine (2 g, 10.74 mmol) in DCM (10 mL) was added 4-chloro-3-trifluoromethyl isocyanate (2.4 g, 10.74 mmol). The solution was stirred overnight at room temperature. The solvent was removed by distillation, and the resultant solid was washed with EtOAc to give 3.6 g (82%) of the title product; MS LC-MS [M+H]⁺=408.

Step 2: Preparation of N-[4-Chloro-3-(trifluoromethyl)phenyl]-N′-{4-[(1-oxidopyridin-4-yl)oxy]-phenyl}urea

To a solution of N-[4-chloro-3-(trifluoromethyl)phenyl]-N′-[4-(pyridin-4-yloxy)phenyl]-urea (3.1 g, 7.6 mmol) in DCM (40 mL) and acetone (10 mL) was added m-CPBA (1.5 g). The mixture was stirred at room temperature for 12 h, followed by addition of another portion of m-CPBA (1.5 g) and the solution was stirred for another 12 h at RT. The solution was then washed with 10% aqueous sodium carbonate. The solvent was removed to give the title product, 2.9 g (90%); MS LC-MS [M+H]⁺=424.

Step 3: Preparation of the title compound N-[4-Chloro-3-(trifluoromethyl)phenyl]-N′-{4-[(2-cyanopyridin-4-yl)oxy]phenyl}urea

To a solution of N-[4-chloro-3-(trifluoromethyl)phenyl]-N′-{4-[(1-oxidopyridin-4-yl)oxy]-phenyl}urea (2 g, 4.72 mmol) in anhydrous DMF (50 mL) was added trimethylsilyl cyanide (0.7 g, 7.1 mmol) at room temperature, followed by dropwise addition of dimethyl carbamyl chloride (1.27 g, 11.8 mmol) in DMF (10 mL) over 30 min. The mixture was stirred at room temperature for 24 h. A solution of 10% aqueous sodium carbonate (50 mL) was added dropwise and stirred for 10 min, followed by extraction with EtOAc (3×). The extracts were combined, dried over MgSO₄, and evaporated under reduced pressure. The residue was purified by flash chromatography (EtOAc:Hexane:MeOH 45:45:10) to afford 1.8 g (88%) of the title product. ¹H-NMR (DMSO-d₆) δ 9.20 (s, 1H), 9.01 (s, 1H), 8.57 (d, J=5.7 Hz, 1H), 8.10 (d, J=2.4 Hz, 1H), 7.66 to 7.56 (m, 5H), 7.19 to 7.14 (m, 3H); MS LC-MS [M+H]⁺=433, RT=3.56 min; TLC (75% EtOAc/Hex), R_f=0.53.

Preparation of N-{4-[(2-Cyanopyridin-4-yl)oxy]phenyl}-N′-(2,2,4,4-tetrafluoro-4H-1,3-benzodioxin-6-yl)urea

Step 1: Preparation of 4-(4-Aminophenoxy)pyridine-2-carbonitrile

A solution of 4-aminophenol (1.0 g, 9.16 mmol) in anhydrous DMF (9.2 mL) was treated with potassium tert-butoxide (1.08 g, 9.62 mmol, 1.05 eq), and the orange-brown reaction mixture was stirred at RT for 1 h. The contents were treated with 2-cyano-4-chloropyridine (1.27 g, 9.16 mmol, 1.0 eq) and K₂CO₃(497 mg, 5.04 mmol, 0.55 eq) and then heated at 90° C. for 17 h. The mixture was cooled to RT and partitioned between EtOAc (250 mL) and a saturated NaCl solution (100 mL). The aqueous phase was back-extracted with EtOAc (300 mL). The combined organic layers were washed with brine, dried over Na₂SO₄, and concentrated under reduced pressure. Purification on MPLC (biotage) eluted with 30% EtOAc—hexanes afforded 1.83 g (94.6%) of 4-(4-aminophenoxy)pyridine-2-carbonitrile as a yellow solid. ¹H-NMR (DMSO-d₆) δ 8.52 (d, J=6.3 Hz, 1H), 7.54 (d, J=2.4 Hz, 1H), 7.07 (dd, J=5.4, 2.4 Hz, 1H), 6.86 (d, J=8.7 Hz, 2H), 6.62 (d, J=8.7 Hz, 2H), 5.21 (s, 2H); MS LC-MS [M+H]⁺=212, RT=0.98 min; TLC (50% EtOAc/Hex), R_f=0.28.

Step 2: Preparation of the title compound N-{4-[(2-Cyanopyridin-4-yl)oxy]phenyl}-N′-(2,2,4,4-tetrafluoro-4H-1,3-benzodioxin-6-yl)urea

A solution of 4-(4-aminophenoxy)pyridine-2-carbonitrile (300 mg, 1.42 mmol) and 2,2,4,4-tetrafluoro-6-isocyanate-1,3-benzodioxene (389.2 mg, 1.56 mmol, 1.1 eq) in anhydrous 1,2-dichloroethane (7.1 mL) was stirred at 80° C. under argon for 17 h, where upon a white solid precipitated out during the course of the reaction. The reaction mixture was cooled to RT, and the precipitate was collected and washed with DCM (3.0 mL) and ether (3×5 mL) to give 355 mg (54.3%) of the title compound. ¹H-NMR is (DMSO-d₆) δ9.14 (s, 1H), 9.03 (s, 1H), 8.57 (d, J=6.0 Hz, 1H), 8.11 (d, J=2.7 Hz, 1H), 7.66 to 7.57 (m, 4H), 7.43 (d, J=9.0 Hz, 1H), 7.19 to 7.14 (m, 3H); MS LC-MS [M+H]⁺=461, RT=3.59 min; TLC (75% EtOAc/Hex), R_f=0.29.

Preparation of N-{4-[(2-cyanopyridin-4-yl)oxy]phenyl}-N′-(1-methyl-1H-indazol-5-yl)urea

To a solution of 1-methyl-5-aminoindazole (230 mg, 1.56 mmol) in anhydrous DCE (2.4 mL) was added 1,1′-carbonyldiimidazole (281.5 mg, 1.70 mmol, 1.2 eq), and the reaction mixture was stirred at 65° C. under argon. After 16 h a solution of 5-(4-aminophenoxy)pyridine-2-carbonitrile (300 mg, 1.42 mmol, 0.91 eq) in anhydrous THF (4.0 mL) was added at ambient temperature, and the reaction mixture was stirred at 65° C. under argon for 7 h. The reaction mixture was partitioned between EtOAc and water, and the organic layer was washed with water and brine, dried over Na₂SO₄, filtered, and concentrated under reduced pressure. The crude residue was triturated in DCM (10 mL) to afford 382.4 mg (70%) of the title compound as a white solid. ¹H-NMR (DMSO-d₆) δ 8.84 (s, 1H), 8.70 (s, 1H), 8.57 (d, J=6.0 Hz, 1H), 7.95 (d, J=1.0 Hz, 1H), 7.90 (d, J=1.8 Hz, 1H), 7.60 to 7.54 (m, 4H), 7.36 (dd, J=9.3, 2.1 Hz, 1H), 7.18 to 7.14 (m, 3H), 4.01 (s, 3H); MS LC-MS [M+H]⁺=385, RT=2.64 min; TLC (100% EtOAc), R_f=0.22.

Preparation of N-{4-[(2-cyanopyridin-4-yl)oxy]phenyl}-N′-Quinolin-6-ylurea

The title compound was prepared in the same manner described for N-{4-[(2-cyanopyridin-4-yl)oxy]phenyl}-N′-(1-methyl-1H-indazol-5-yl)urea, substituting 6-aminoquino-line for 1-methyl-5-aminoindazole. ¹H-NMR (DMSO-d₆) δ 8.76 (dd, J=2.7, 7.2 Hz, 1H), 8.58 (dd, J=0.6, 5.7 Hz, 1H), 8.51 (s, 1H), 8.44 (s, 1H), 8.28 (d, J=2.7 Hz, 1H), 8.21 (dd, J=0.6, 7.8 Hz, 1H), 7.96 (d, J=9.3 Hz, 1H), 7.78-7.71 (m, 3H), 7.49-7.42 (m, 2H), 7.22-7.17 (m, 3H); MS LC-MS [M+H]⁺=382, RT=2.03 min; TLC (100% EtOAc), R_f=0.38.

Preparation of Methyl 4-[3-({[(1-methyl-1H-indazol-5-yl)amino]carbonyl}amino)phenoxy]-pyridine-2-carboxylate

To a solution of 4-(3-amino-phenoxy)-pyridine-2-carboxylic acid methyl ester (0.79 g, 5.35 mmol) in DCM (3 mL) was added 1,1′-carbonyldiimidazole (0.87 g, 5.35 mmol), and the reaction mixture was stirred at room temperature for 12 h. A solution of 1-methyl-5-aminoindazole (1.02 g, 6.96 mmol) in DCM (4 mL) was added, and the mixture stirred at room temperature an additional 8 h. The mixture was concentrated in vacuo. Purification of the crude product by column chromatography eluted with 5% MeOH-DCM gave 850 mg (38%) of the title compound. ¹H-NMR (CD₃OD) δ 8.57 (dd, 1H), 7.95 (d, 1H), 7.87 (d, 1H), 7.54 (d, 1H), 7.53-7.51 (m, 2H), 7.47-7.32 (m, 2H), 7.32 (d, 1H), 7.21 (dd, 1H), 6.86 (dd, 1H). 4.07 (s, 3H), 3.96 (s, 3H); MS LC-MS [M+H]⁺=418, RT=2.91 min.

Preparation of Methyl 4-[3-({[(2,2,4,4-tetrafluoro-4H-1,3-benzodioxin-6-yl)amino]-carbonyl}amino)phenoxy]pyridine-2-carboxylate

To a stirring solution of 2,2,4,4-tetrafluoro-6-isocyanato-1,3-benzodioxene (0.816 g, 3.28 mmol) was added 4-(3-aminophenoxy)pyridine-2-carboxylic acid methyl ester (0.800 g, 3.28 mmol) in DCM (13 mL) in portions. The homogenous contents turned white and opaque within 1 min. of addition, and were allowed to stir at room temperature for 12 h. The heterogenous mixture was filtered, and solid product repeatedly washed with DCM to remove residual starting material. The desired product was collected as a white powder, 1.36 g (83%). ¹H-NMR (DMSO-d₆) δ 9.08 (d, 2H), 8.59 (s, 1H), 8.07 (s, 1H), 7.60 (dd, 1H), 7.37 (m, 4H), 7.25 (d, 1H), 7.20 (dd, 1H), 6.80 (d, 1H), 3.82 (s, 3H); MS LC MS [M+H]⁺=494.1, RT=3.23 min.

Preparation of Methyl 4-[4-({[(4-Chloro-3-trifluoromethyl-phenyl)amino]carbonyl}amino)-phenoxy]pyridine-2-carboxylate

The title compound was prepared in the same manner described for methyl 4-[3-({[(2,2,4,4-tetrafluoro-4H-1,3-benzodioxin-6-yl)amino]-carbonyl}amino)phenoxy]pyridine-2-carboxylate, substituting 4-chloro-3-(trifluoromethyl)phenyl isocyanate for 2,2,4,4-tetrafluoro-6-isocyanate-1,3-benzodioxene, and 4-(4-aminophenoxy)pyridine-2-carboxylic acid methyl ester for 4-(3-aminophenoxy)pyridine-2-carboxylic acid methyl ester. ¹H-NMR (DMSO-d₆) δ 9.21 (s, 1H), 9.00 (s, 1H), 8.57 (d, J=6.0 Hz, 1H), 8.11 (d, J=2.1 Hz, 1H), 7.64 to 7.56 (m, 4H), 7.41 (d, J=3.0 Hz, 1H), 7.19 to 7.15 (m, 3H), 3.83 (s, 3H); MS LC-MS [M+H]⁺=466.

Preparation of Methyl 4-[4-({[(2,2,4,4-tetrafluoro-4H-1,3-benzodioxin-6-yl)amino]carbonyl}amino)phenoxy]pyridine-2-carboxylate

The title compound was prepared in the same manner described for methyl 4-[3-({[(2,2,4,4-tetrafluoro-4H-1,3-benzodioxin-6-yl)amino]-carbonyl}amino)phenoxy]pyridine-2-carboxylate, substituting 4-(4-aminophenoxy)pyridine-2-carboxylic acid methyl ester for 4-(3-aminophenoxy)pyridine-2-carboxylic acid methyl ester. ¹H-NMR (Acetone-d₆) δ 8.85 (broad s, 1H), 8.73 (broad s, 1H), 8.56 (d, J=5.7 Hz, 1H), 8.17 (d, J=2.7 Hz, 1H), 7.75 (dd, J=9.0, 2.4 Hz, 1H), 7.67 (dt, J=9.0, 3.6 Hz, 2H), 7.55 (d, J=2.4 Hz, 1H), 7.26 (dd, J=9.0, 1.2 Hz, 1H), 7.15 to 7.08 (m, 3H), 3.90 (s, 3H); MS LC-MS [M+H]⁺=494.

Preparation of 4-[3-({[(1-Methyl-1H-indazol-5-yl)amino]carbonyl}amino)phenoxy]pyridine-2-carboxylic acid

A mixture of methyl 4-[3-({[(1-methyl-1H-indazol-5-yl)amino]carbonyl}amino)-phenoxy]pyridine-2-carboxylate (0.08 g, 0.19 mmol) and potassium hydroxide (0.03 g, 0.56 mmol) in MeOH/H₂O (4 mL, 3:1) was heated at 40° C. for 3 hours. The solvent was removed under reduced pressure, and the crude residue was dissolved in H₂O (5 mL). The aqueous solution was neutralized with aq. 1N HCl. The precipitated solid was then washed with water followed by DCM to give 0.55 g (70%) of the title compound. ¹H-NMR (DMSO-d₆) δ 9.97 (s, 1H), 9.77 (s, 1H), 8.46 (d, 1H), 7.93 (s, 1H), 7.90 (s, 1H), 7.51 (d, 1H), 7.43-7.34 (m, 5H), 7.07 (dd, 1H), 6.73 (dd, 1H), 3.97 (s, 3H); MS LC-MS [M+H]⁺=404.

Preparation of {4-[3-(2,2,4,4-Tetrafluoro-4H-benzo[1,3]dioxin-6-yl)phenoxy]phenyl}acetic acid

The title compound was prepared in the same manner described for 4-[3-({[(1-methyl-1H-indazol-5-yl)amino]carbonyl}amino)phenoxy]pyridine-2-carboxylic acid, substituting methyl 4-[3-({[(2,2,4,4-tetrafluoro-4H-1,3-benzodioxin-6-yl)amino]-carbonyl}amino)phenoxy]-pyridine-2-carboxylate for methyl 4-[3-({[(1-methyl-1H-indazol-5-yl)amino]carbonyl}amino)-phenoxy]-pyridine-2-carboxylate. ¹H-NMR (DMSO-d₆) δ 9.58 (s, 1H), 9.39 (s, 1H), 8.58 (d, 1H), 8.08 (d, 1H), 7.62 (dd, 1H), 7.38-7.47 (m, 4H), 7.32 (dd, 1H), 7.18 (dd, 1H), 6.83 (dd, 1H); MS LC-MS [M+H]⁺=480.

Preparation of 4-[3-({[(4-chloro-3-trifluoromethyl-phenyl)amino]carbonyl}amino)phenoxy]pyridine-2-carboxylic acid

The title compound was prepared in the same manner described for 4-[4-({[(4-Chloro-3-trifluoromethylphenyl)amino]carbonyl}amino)phenoxy]pyridine-2-carboxylate, substituting 4-(3-aminophenoxy)pyridine-2-carboxylic acid for 4-(4-aminophenoxy)pyridine-2-carboxylic acid methyl ester. ¹H-NMR (CD₃OD) δ 8.66 (d, J=4.2 Hz, 1H), 8.03 (d, J=2.7 Hz, 1H), 7.77 (d, J=2.2 Hz, 1H), 7.67 (dd, J=1.8, 5.4 Hz, 1H), 7.60 (t, J=2.7 Hz, 1H), 7.59 to 7.49 (m, 2H), 7.41 to 7.37 (m, 2H), 6.06 (dd, J=2.4 Hz, 1 Hz, 1H); MS LC-MS [M+H]⁺=452, RT=2.54 min.
The present invention provides, but is not limited, to the embodiments defined in the following paragraphs:

EXAMPLES

Example 1

Preparation of 4-{4-[({[4-Chloro-3-(trifluoromethyl)phenyl]amino}carbonyl)amino]phenoxy}-pyridine-2-carboximidamide

To a mixture of ammonium chloride (1.73 mmol) in toluene at 0° C. was added trimethylaluminum (1.73 mmol, 0.87 mL of 2 M in toluene), and the mixture was stirred at RT until the reaction becomes clear. N-[4-Chloro-3-(trifluoromethyl)phenyl]-N′-{4-[(2-cyanopyridin-4-yl)oxy]phenyl}urea (0.35 mmol, 150 mg) was then added and the mixture was heated at 90° C. for 18 h. The solvent was removed and the residue was purified by flash chromatography (35:9:5:1 v/v EtOAc:MeOH:hexane:NH₄OH) to give 18 mg (17%) of the title product as a white solid. ¹H-NMR (CD₃OD) δ 8.61 (s, 1H), 8.00 (s, 1H), 7.79 (s, 1H), 7.58 (m, 3H), 7.52 (m, 3H), 7.10 (m, 3H); MS LC-MS [M+H]⁺=450, RT=3.13 min.

Example 2

Preparation of 4-{4-[({[4-Chloro-3-(trifluoromethyl)phenyl]amino}carbonyl)amino]phenoxy}-N-methylpyridine-2-carboximidamide

To a mixture of methylamine hydrochloride (117 mg, 1.73 mmol) in anhydrous toluene at 0° C. was added trimethylaluminum (1.73 mmol, 0.87 mL of 2 M in toluene), and the reaction mixture was stirred at RT until the reaction becomes clear. N-[4-Chloro-3-(trifluoromethyl)phenyl]-N′-{4-[(2-cyanopyridin-4-yl)oxy]phenyl}urea (0.35 mmol, 150 mg) was then added, and the mixture heated at 90° C. for 17 h. The solvent was then removed and the residue was purified by flash chromatography (35:10:4:1 v/v EtOAc:MeOH:Hexane:NH₄OH) to give 79 mg (49%) of the title product as a yellow solid. ¹H-NMR (DMSO-d₆) δ 10.14 (s, 1H), 9.80 (s, 1H), 10.05 to 9.20 (broad s, 2H), 8.62 (d, J=5.4 Hz, 1H), 8.10 (s, 1H), 7.89 (d, J=2.4 Hz, 1H), 7.62 to 7.52 (m, 4H), 7.19 to 7.15 (m, 3H), 3.02 (s, 3H); MS LC-MS [M+H]⁺=464, RT=2.54 min.

Example 3

Preparation of N-Methyl-4-[4-({[(2,2,4,4-tetrafluoro-4H-1,3-benzodioxin-6-yl)amino]carbonyl}-amino)phenoxy]pyridine-2-carboximidamide

The title compound was prepared in the same manner described for 4-{4-[({[4-chloro-3-(trifluoromethyl)phenyl]amino}carbonyl)amino]phenoxy}-N-methylpyridine-2-carboximid-amide, substituting N-{4[(2-cyanopyridin-4-yl)oxy]phenyl}-N′-(2,2,4,4-tetrafluoro-4H-1,3-benzodioxin-6-yl)urea for N-[4-chloro-3-(trifluoromethyl)phenyl]-N′-{4-[(2-cyanopyridin-4-yl)-oxy]phenyl}urea. ¹H-NMR (DMSO-d₆) δ 9.84 (s, 1H), 9.59 (s, 1H), 8.64 (d, J=5.4 Hz, 1H), 8.10 (d, J=2.4 Hz, 1H), 7.86 (d, J=2.4 Hz, 1H), 7.67 to 7.58 (m, 3H), 7.43 (d, J=9.0 Hz, 1H), 7.20 to 7.16 (m, 3H), 3.01 (s, 3H); MS LC-MS [M+H]⁺=492, RT=2.57 min.

Example 4

Preparation of N-Methyl-4-(4-{[(quinolin-6-ylamino)carbonyl]amino}phenoxy)pyridine-2-carboximidamide

The title compound was prepared in the same manner described for 4-{4-[({[4-chloro-3-(trifluoromethyl)phenyl]amino}carbonyl)amino]phenoxy}-N-methylpyridine-2-carboximid-amide, substituting N-{4-[(2-cyanopyridin-4-yl)oxy]phenyl}-N′-quinolin-6-ylurea for N-[4-chloro-3-(trifluoromethyl)phenyl]-N′-{4-[(2-cyanopyridin-4-yl)-oxy]phenyl}urea. ¹H-NMR (DMSO-d₆) δ 9.68 (s, 1H), 9.60 (s, 1H), 8.72 (dd, J=1.2, 3.9 Hz, 1H), 8.64 (d, J=5.71H, 1H), 8.25 (d, J=0.69 Hz, 1H), 8.16 (d, J=2.4 Hz, 1H), 7.94 (d, J=9.0 Hz, 1H), 7.87 (d, J=1.8 Hz, 1H), 7.73 (dd, J=2.4 Hz, 9.0 Hz, 1H), 7.66 to 7.62 (m, 2H), 7.46 to 7.42 (m, 1H), 7.21 to 7.17 (m, 3H), 3.02 (s, 3H); MS LC-MS [M+H]⁺=413, RT=1.58 min; TLC (EtOAc:MeOH:Hexanes:NH₄OH v/v 35:10:4:1), R_f=0.22.

Example 5

Preparation of 4-{4-[({[4-Chloro-3-(trifluoromethyl)phenyl]amino}carbonyl)amino]phenoxy}-pyridine-2-carbothioamide

Hydrogen sulfide gas was bubbled into a solution of N-[4-chloro-3-(trifluoromethyl)phenyl]-N′-{4-[(2-cyanopyridin-4-yl)-oxy]phenyl}urea (230 mg, 0.53 mmol) in anhydrous DMF (30 mL) at RT. After 10 minutes diethylamine (58 mg, 0.80 mmol) was added, and the reaction mixture was heated to 60° C. for 1 h. The mixture was poured into EtOAc (200 mL), and the organic phase was washed with water (2×200 mL), brine (1×200 mL), dried over Na₂SO₄, and concentrated in vacuo. The residue was purified by flash chromatography eluted with 50% EtOAc/hexane to give 180 mg (73%) of the title product as a yellow solid. ¹H-NMR (DMSO-d₆) δ 10.2 (broad s, 1H), 9.93 (broad s, 1H), 9.23 (s, 1H), 9.02 (s, 1H), 8.47 (d, J=5.7 Hz, 1H), 8.11 (d, J=2.1 Hz, 1H), 7.95 (d, J=2.4 Hz, 1H), 7.67 to 7.57 (m, 4H), 7.19 to 7.11 (m, 3H); MS LC-MS [M+H]⁺=467, RT=3.47 min.

Example 6

Preparation of 4-(4-{[(Quinolin-6-ylamino)carbonyl]amino}phenoxy)pyridine-2-carbothioamide

The title compound was prepared in the same manner described for 4-{4-[({[4-chloro-3-(trifluoromethyl)phenyl]amino}carbonyl)amino]phenoxy}pyridine-2-carbothioamide, substituting N-{4-[(2-cyanopyridin-4-yl)oxy]phenyl}-N′-quinolin-6-ylurea for N-[4-chloro-3-(trifluoromethyl)phenyl]-N′-{4-[(2-cyanopyridin-4-yl)-oxy]phenyl}urea. ¹H-NMR (DMSO-d₆) δ 10.19 (s, 1H), 9.92 (s, 1H), 9.08 (s, 1H), 8.95 (s, 1H), 8.73 (dd, J=2.4, 4.5 Hz, 1H), 8.47 (d, J=5.4 Hz, 1H), 8.24 (dd, J=0.9, 7.8 Hz, 1H), 8.17 (d, J=2.4 Hz, 1H), 7.97 to 7.92 (m, 2H), 7.71 (dd, J=2.7, 9.0 Hz, 1H), 7.64 to 7.59 (m, 2H), 7.47 to 7.43 (m, 1H), 7.20 to 7.11 (m, 3H); MS LC-MS [M+H]⁺=416, RT=2.08 min; TLC (EtOAc:MeOH:Hexanes:NH₄OH v/v 35:10:4:1), R_f=0.75.

Example 7

Preparation of 4-[4-({[(1-Methyl-1H-indazol-5-yl)amino]carbonyl}amino)phenoxy]pyridine-2-carbothioamide

The title compound was prepared in the same manner described for 4-{4-[({[4-chloro-3-(trifluoromethyl)phenyl]amino}carbonyl)amino]phenoxy}pyridine-2-carbothioamide, substituting N-{4-[(2-cyanopyridin-4-yl)oxy]phenyl}-N′-(1-methyl-1H-indazol-5-yl)urea for N-[4-chloro-3-(trifluoromethyl)phenyl]-N′-{4-[(2-cyanopyridin-4-yl)-oxy]phenyl}urea. ¹H-NMR (DMSO-d₆) δ 10.18 (s, 1H), 9.92 (s, 1H), 8.80 (s, 1H), 8.68 (s, 1H), 8.46 (d, J=5.7 Hz, 1H), 7.96 to 7.89 (m, 3H), 7.60 to 7.54 (m, 3H), 7.36 (dd, J=1.8, 9.0 Hz, 1H), 7.18 to 7.10 (m, 3H), 4.00 (s, 3H); MS LC-MS [M+H]⁺=419, RT=2.62 min.

Example 8

Preparation of N-[4-Chloro-3-(trifluoromethyl)phenyl]-N′-(4-{[2-(hydrazinocarbonyl)pyridin-4-yl]oxy}phenyl)urea

A mixture of methyl 4-[4-({[(4-chloro-3-trifluoromethyl-phenyl)amino]carbonyl}amino)-phenoxy]pyridine-2-carboxylate (600 mg, 1.29 mmol) and hydrazine hydrate (645 mg, 12.9 mmol) in anhydrous MeOH (50 mL) was stirred at RT under argon for 18 h. The reaction mixture was diluted with EtOAc (200 mL), washed with water and brine. The organic layer was dried over Na₂SO₄, filtered, and concentrated under reduced pressure. The crude product was purified by flash chromotography eluted with 100% EtOAc to give 580 mg (97%) of the title compound. ¹H-NMR (DMSO-d₆) δ 9.88 (s, 1H), 9.26 (s, 1H), 9.08 (s, 1H), 8.48 (d, 1H), 8.10 (d, 1H), 7.66-7.58 (m, 4H), 7.36 (d, 1H), 7.18-7.08 (m, 3H), 4.50 (s, 2H); MS LC-MS [M+H]⁺=466, RT=2.83 min; TLC (100% EtOAc), R_f=0.15.

Example 9

Preparation of N-(4-{[2-(Hydrazinocarbonyl)pyridin-4-yl]oxy}phenyl)-N′-(2,2,4,4-tetrafluoro-4H-1,3-benzodioxin-6-yl)urea

The title compound was prepared in the same manner described for N-[4-chloro-3-(trifluoromethyl)phenyl]-N′-(4-{[2-(hydrazinocarbonyl)pyridin-4-yl]oxy}phenyl)urea, substituting methyl 4-[4-({[(2,2,4,4-tetrafluoro-4H-1,3-benzodioxin-6-yl)amino]carbonyl}-amino)phenoxy]pyridine-2-carboxylate for methyl 4-[4-({[(4-chloro-3-trifluoromethylphenyl)-amino]-carbonyl}amino)phenoxy]pyridine-2-carboxylate. ¹H-NMR (DMSO-d₆) δ 9.89 to 9.86 (m, 1H), 9.17 (s, 1H), 9.03 (s, 1H), 8.46 (d, J=6.0 Hz, 1H), 8.10 (d, J=2.4 Hz, 1H), 7.66 (dd, J=2.1, 9.0 Hz, 1H), 7.60 to 7.56 (m, 2H), 7.41 (d, J=9.0 Hz, 1H), 7.32 (d, J=2.7 Hz, 1H), 7.17 to 7.09 (m, 3H), 4.52 (d, J=4.5 Hz, 2H); MS LC-MS [M+H]⁺=494, RT=2.88 min; TLC (100% EtOAc), R_f=0.15.

Example 10

Preparation of N-[4-Chloro-3-(trifluoromethyl)phenyl]-N′-[3-({2-[(2,2-dimethylhydrazino)-carbonyl]pyridin-4-yl}oxy)phenyl]urea

To a solution of 4-[3-({[(4-chloro-3-trifluoromethyl-phenyl)amino]carbonyl}amino)-phenoxy]pyridine-2-carboxylic acid (120 mg, 0.27 mmol) in anhydrous DMF (3 mL) was added 1,1-dimethylhydrazine (20 mg, 0.27 mmol), HOBT (80 mg, 0.58 mmol), EDCl (80 mg, 0.40 mmol) and N-methylmorphine (60 mg, 0.58 mmol). The reaction mixture was stirred at room temperature overnight. The solvent was removed under reduced pressure. The crude product was purified by HPLC and neutralized with aqueous sodium bicarbonate (1N) to give 100 mg (75.5%) of the title compound. ¹H-NMR (CD₃OD) δ 8.48 (d, J=5.4 Hz, 1H), 7.97 (d, J=2.4 Hz, 1H), 7.63 (dd, J=5.4, 2.4 Hz, 1H), 7.51 (d, J=3.0 Hz, 1H), 7.48 to 7.39 (m, 3H), 7.32 to 7.31 (m, 1H), 7.13 (dd, J=5.7, 3.0 Hz, 1H), 6.84 (dd, J=7.2, 1.5 Hz, 1H), 2.68 (s, 6H); MS LC-MS [M+H]⁺=494, RT=3.46 min.

Example 11

Preparation of 4-{3-[({[4-Chloro-3-(trifluoromethyl)phenyl]amino}carbonyl)amino]-phenoxy}-N-[2-(dimethylamino)ethyl]pyridine-2-carboxamide

The title compound was prepared in the same manner described for N-[4-chloro-3-(trifluoromethyl)phenyl]-N′-[3-({2-[(2,2-dimethylhydrazino)-carbonyl]pyridin-4-yl}oxy)phenyl]-urea, substituting N-aminopiperidine for 1,1-dimethylhydrazine. ¹H-NMR (DMSO-d₆) δ 9.53 (s, 1H), 9.22 (s, 1H), 9.10 (s, 1H), 8.51 (d, J=5.7 HZ, 1H), 8.05 (d, J=1.8 Hz, 1H), 7.60 to 7.58 (m, 2H), 7.47 to 7.17 (m, 4H), 6.82 (dd, J=7.2, 1.5 Hz, 1H), 2.78 to 2.74 (m, 4H), 1.57 to 1.54 (m, 4H), 1.32 to 1.30 (m, 2H); MS LC-MS [M+H]⁺=534, RT=3.28 min.

Example 12

Preparation of 4-{3-[({[4-Chloro-3-(trifluoromethyl)phenyl]amino}carbonyl)amino]-phenoxy}-N-morpholin-4-ylpyridine-2-carboxamide

The title compound was prepared in the same manner described for N-[4-chloro-3-(trifluoromethyl)phenyl]-N′-[3-({2-[(2,2-dimethylhydrazino)-carbonyl]pyridin-4-yl}oxy)phenyl]-urea, substituting N-aminopiperidine for 1,1-dimethylhydrazine. ¹H-NMR (CD₃OD) δ 8.48 (d, J=4.8 Hz, 1H), 7.97 (d, J=2.4 Hz, 1H), 7.65 to 7.57 (m, 2H), 7.48 to 7.30 (m, 4H), 7.11 to 7.09 (m, 1H), 6.82 (dd, J=2.1, 1.0 Hz, 1H), 3.81 to 3.78 (m, 4H), 2.92 to 2.89 (m, 4H); MS LC-MS [M+H]⁺=536, RT=3.10 min.

Example 13

Preparation of N-Piperidin-1-yl-4-[3-({[(2,2,4,4-tetrafluoro-4H-1,3-benzodioxin-6-yl)amino]-carbonyl}amino)phenoxy]pyridine-2-carboxamide

To a mixture of {4-[3-(2,2,4,4-tetrafluoro-4H-benzo[1,3]dioxin-6-yl)phenoxy]phenyl}-acetic acid (100 mg, 0.21 mmol) in DMF (3 mL) at RT was added 1-aminopiperidine (20 mg, 0.21 mmol), HOBT (60 mg, 0.46 mmol), EDCl (60 mg, 0.31 mmol), and N-methylmorpholine (50 mg, 0.46 mmol). The mixture was stirred at RT overnight. The solvent was removed and the residue diluted with DCM (10 mL), and then washed with H₂O (3 mL). The crude product was purified by HPLC and neutralized with NaHCO₃to give 56 mg (45%) of the title product. ¹H-NMR (DMSO-d₆) δ 9.65 (s, 1H), 9.19 (s, 1H), 9.14 (s, 1H), 8.51 (d, 1H), 8.07 (d, 1H), 7.62 (dd, 1H), 7.38 to 7.49 (m, 4H), 7.30 (dd, 1H), 7.21 (dd, 1H), 6.85 (dd, 1H), 2.72 to 2.79 (m, 4H), 1.55 to 1.59 (m, 4H), 1.34 (m, 2H); MS LC-MS [M+H]⁺=562, RT=3.28 min.

Example 14

Preparation of N-Morpholin-4-yl-4-[3-({[(2,2,4,4-tetrafluoro-4H-1,3-benzodioxin-6-yl)amino]-carbonyl}amino)phenoxy]pyridine-2-carboxamide

The title compound was prepared in the same manner described for N-piperidin-1-yl-4-[3-({[(2,2,4,4-tetrafluoro-4H-1,3-benzodioxin-6-yl)amino]-carbonyl}amino)phenoxy]pyridine-2-carboxamide, substituting 4-aminomorpholine for N-aminopiperidine. ¹H-NMR (DMSO-d₆) δ 9.81 (s, 1H), 9.17 (s, 1H), 9.12 (s, 1H), 8.50 (d, 1H), 8.06 (d, 1H), 7.60 (dd, 1H), 7.37-7.48 (m, 4H), 7.29 (dd, 1H), 7.21 (dd, 1H), 6.83 (dd, 1H), 3.61-3.64 (m, 4H), 2.71-2.87 (m, 4H); MS LC-MS [M+H]⁺=564, RT=3.20 min.

Example 15

Preparation of 4-[3-({[(1-methyl-1H-indazol-5-yl)amino]carbonyl}amino)phenoxy]-N-morpholin-4-ylpyridine-2-carboxamide

To a mixture of 4-[3-({[(1-methyl-1H-indazol-5-yl)amino]carbonyl}amino)phenoxy]-pyridine-2-carboxylic acid (70 mg, 0.17 mmol) in DMF (3 mL) at RT was added 4-aminomorpholine (20 mg, 0.17 mmol), HOBT (50 mg, 0.38 mmol), EDCl (50 mg, 0.26 mmol), and N-methylmorpholine (40 mg, 0.38 mmol). The reaction mixture was stirred at RT overnight. The solvent was removed and the residue diluted with methylene DCM (10 mL) and then washed with H₂O (3 mL). The crude product was purified by HPLC and neutralized with NaHCO₃to give 38 mg (44%) of the title product. ¹H-NMR (CD₃OD) δ 8.46 (d, 1H), 7.89 (s, 1H), 7.83 (d, 1H), 7.57 (d, 1H), 7.45-7.50 (m, 2H), 7.35-740 (m, 2H), 7.26 (dd, 1H), 7.08 (dd, 1H), 6.76 (dd, 1H), 4.04 (s, 3H), 3.76-3.79 (m, 4H), 2.84-2.91 (m, 4H); MS LC-MS [M+H]⁺=488, RT=2.86 min.

Example 16

Preparation of N-[4-Chloro-3-(trifluoromethyl)phenyl]-N′-(4-{[2-(1H-tetrazol-5-yl)pyridin-4-yl]-oxy}phenyl)urea

A mixture of the N-[4-chloro-3-(trifluoromethyl)phenyl]-N′-{4-[(2-cyanopyridin-4-yl)oxy]phenyl}urea (300 mg, 0.23 mmol), sodium azide (1.5 mmol, 67.6 mg), and triethylamine hydrochloride (143 mg, 1.5 mmol) in toluene (20 mL) was heated at 80° C. for 2 days. The solvent was removed, and the residue was purified by flash chromatography (40:30:28:2 v/v EtOAc:hexane:MeOH:NH₄OH) to give 210 mg (63%) of the desired product. ¹H-NMR (DMSO-d₆) δ 9.55 (s, 1H), 9.21 (s, 1H), 8.42 (d, 1H), 8.19 (s, 2H), 7.65 (m, 1H), 7.60 (m, 3H), 7.42 (s, 1H), 7.20 (m, 2H), 6.95 (s, 1H); MS LC-MS [M+H]⁺=476, RT=3.11 min.

Example 17

Preparation of 1 N-[4-chloro-3-(trifluoromethyl)phenyl]-N′-(4-{[2-(4,5-dihydro-1H-imidazol-2-yl)pyridin-4-yl]oxy}phenyl)urea

A mixture of N-[4-chloro-3-(trifluoromethyl)phenyl]-N′-{4-[(2-cyanopyridin-4-yl)oxy]-phenyl}urea (100 mg, 0.23 mmol), ethylenediamine (42 mg, 0.69 mmol), and sulfur (22 mg, 0.69 mmol) in DMF (3 mL) was heated at 80° C. overnight. The solvent was removed, and the residue was purified by preparative HPLC to give 81 mg (73%) of the desired product. ¹H-NMR (DMSO-d₆) δ 9.22 (s, 1H), 9.05 (s, 1H), 8.50 (d, 1H), 7.60 (m, 5H), 7.39 (s, 1H), 7.19 (m, 3H), 3.65 (s, 4H); MS LC-MS [M+H]⁺=476, RT=2.74 min.

Example 18

Preparation of N-[4-Chloro-3-(trifluoromethyl)phenyl]-N′-(4-{[2-(1,3,4-oxadiazol-2-yl)pyridin-4-yl]oxy}phenyl)urea

The title compound was prepared in the same manner described for 4-[4-({[(4-Chloro-3-trifluoromethylphenyl)amino]carbonyl}amino)phenoxy]pyridine-2-carboxylate, substituting 4-(2-[1,3,4]oxadiazol-2-yl-pyridin-4-yloxy)phenylamine for 4-(4-aminophenoxy)pyridine-2-carboxylic acid methyl ester. ¹H-NMR (Acetone-d₆) δ 9.06 (s, 1H), 8.70 (s, 1H), 8.63 (d, J=6.0 Hz, 1H), 8.54 (s, 1H), 8.17 (d, J=2.7 Hz, 1H), 7.79 to 7.58 (m, 4H), 7.55 (d, J=9.3 Hz, 1H), 7.24 to 7.20 (m, 2H), 7.14 to 7.10 (m, 1H); MS LC-MS [M+H]⁺=476, RT=3.37 min; TLC (100% EtOAc), R_f=0.45.

Example 19

Preparation of N-[4-chloro-3-(trifluoromethyl)phenyl]-N′-(4-{[2-(4-methyl-1,3-thiazol-2-yl)pyridin-4-yl]oxy}phenyl)urea

To 4-{4-[({[4-Chloro-3-(trifluoromethyl)phenyl]amino}carbonyl)amino]phenoxy}-pyri-dine-2-carbothioamide (150 mg, 0.32 mmol) in anhydrous EtOH (20 mL) was added chloroacetyl chloride (30.6 μL, 0.38 mmol, 1.2 eq), and the reaction mixture was refluxed under argon for 18 h. The mixture was poured into diethyl ether (100 mL), and the organic layer was washed with water and brine, dried over Na₂SO₄, filtered, and concentrated at reduced pressure. The crude residue was purified by MPLC (biotage) eluted with 50% ethyl acetate-hexane to afford 145 mg (89%) of the title product, ¹H-NMR (Acetone-d₆) δ 8.60 (s, 1H), 8.45 (d, J=2.4 Hz, 1H), 8.43 (s, 1H), 8.17 (d, J=2.4 Hz, 1H), 7.79 to 7.68 (m, 3H), 7.58 to 7.55 (m, 2H), 7.26 to 7.18 (m, 3H), 7.01 to 6.99 (m, 1H), 2.40 (s, 3H); MS LC-MS [M+H]⁺=505, RT=3.79 min; TLC (50% EtOAc/Hexane), R_f=0.25.

Example 20

Preparation of N-quinolin-6-yl-N′-(4-{[2-(5-thioxo-4,5-dihydro-1,3,4-thiadiazol-2-yl)pyridin-4-yl]oxy}phenyl)urea

To 4-(4-{[(quinolin-6-ylamino)carbonyl]amino}phenoxy)pyridine-2-carbothioamide (50 mg, 0.12 mmol) in anhydrous MeOH (20 mL) was added hydrazine hydrate (60 mg, 1.20 mmol), and the reaction mixture was stirred under Ar at RT for 18 h. The mixture was poured into diethyl ether (100 mL), and the organic layer was washed with water and brine, dried over Na₂SO₄, filtered, and concentrated at reduced pressure. To the crude hydrazine amide was added anhydrous MeOH (30 mL) followed by carbon disulfide (55 mg, 0.73 mmol). The reaction mixture was stirred under Ar at room temperature for 18 h and then taken up in ethyl acetate (100 mL). The reaction mixture was washed with water and brine, dried over Na₂SO₄, filtered, and concentrated at reduced pressure. Purification of the residue using preparative TLC (100% EtOAc) afforded 2 mg (6%) of the title product. ¹H-NMR (Acetone-d₆) δ 8.74 (d, 1H), 8.44 (d, 1H), 8.40 (s, 1H), 7.96 to 7.84 (m, 4H), 7.44 to 7.38 (m, 2H), 7.18 to 7.14 (m, 2H), 7.18 (d, J=9.0 Hz, 2H), 7.08 to 7.00 (m, 2H); MS LC-MS [M+H]⁺=473, RT=3.16 min; TLC (100% EtOAc), R_f=0.15.

Example 21

Preparation of N-[4-Chloro-3-(trifluoromethyl)phenyl]-N′-(4-{[2-(5-oxo-4,5-dihydro-1,3,4-oxadiazol-2-yl)pyridin-4-yl]oxy}phenyl)urea

The title compound was prepared in the same manner described for N-quinolin-6-yl-N′-(4-{[2-(5-thioxo-4,5-dihydro-1,3,4-thiadiazol-2-yl)pyridin-4-yl]oxy}phenyl)urea, substituting, 4-{4-[({[4-chloro-3-(trifluoromethyl)phenyl]amino}carbonyl)amino]phenoxy}-pyridine-2-carbo-thioamide for 4-(4-{[(quinolin-6-ylamino)carbonyl]amino}phenoxy)pyridine-2-carbothioamide, and substituting phosgene for carbon disulfide. ¹H-NMR (DMSO-d₆) δ 12.75 (s, 1H), 9.21 (s, 1H), 8.99 (s, 1H), 8.55 (d, J=5.7 Hz, 1H), 8.10 (d, J=2.4 Hz, 1H), 7.66 to 7.55 (m, 4H), 7.23 (d, J=2.4 Hz, 1H), 7.20 to 7.16 (m, 2H), 7.11 to 7.08 (m, 1H); MS LC-MS [M+H]⁺=492, RT=3.16 min; TLC (10% MeOH/DCM), R_f=0.84.

Example 22

Preparation of N-(4-{[2-(5-oxo-4,5-dihydro-1,3,4-oxadiazol-2-yl)pyridin-4-yl]oxy}phenyl)-N′-(2,2,4,4-tetrafluoro-4H-1,3-benzodioxin-6-yl)urea

The title compound was prepared in the same manner described for N-[4-Chloro-3-(trifluoromethyl)phenyl]-N′-(4-{[2-(5-oxo-4,5-dihydro-1,3,4-oxadiazol-2-yl)pyridin-4-yl]oxy}-phenyl)urea, substituting 4-[3-({[(2,2,4,4-tetrafluoro-4H-1,3-benzodioxin-6-yl)amino]carbonyl}-amino)phenoxy]pyridine-2-carboxamide for 4-{4-[({[4-chloro-3-(trifluoromethyl)phenyl]amino}-carbonyl)amino]phenoxy}pyridine-2-carbothioamide. ¹H-NMR (DMSO-d₆) δ 12.75 (s, 1H), 9.15 (s, 1H), 9.01 (s, 1H), 8.55 (d, J=6.0 Hz, 1H), 8.10 (d, J=2.7 Hz, 1H), 7.68 to 7.57 (m, 3H), 7.42 (d, J=8.7 Hz, 1H), 7.23 (d, J=2.7 Hz, 1H), 7.19 to 7.16 (m, 2H), 7.11 to 7.08 (m, 1H); MS LC-MS [M+H]⁺=520, RT=3.20 min; TLC (10% MeOH/DCM), R_f=0.72.
It is believed that one skilled in the art, using the preceding information and information available in the art, can utilize the present invention to its fullest extent.
It should be apparent to one of ordinary skill in the art that changes and modifications can be made to this invention without departing from the spirit or scope of the invention as it is set forth herein.
The topic headings set forth above and below are meant as guidance where certain information can be found in the application, but are not intended to be the only source in the application where information on such topic can be found.
All publications and patents cited above are incorporated herein by reference.

Claims

1) A compound of formula (I)

or a pharmaceutically acceptable salt, wherein

A is phenyl, naphthyl, pyrrole, furan, thiophene, imidazole, pyrazole, thiazole, oxazole, isoxazole, isothiazole, triazole, tetrazole, thiadiazole, oxadiazole, pyridine, pyrimidine, pyridazine, pyrazine, triazine, benzoxazole, indazole, quinoline, quinazoline, imidazopyrimidine, naphtyridine, or a group of the formula,

or a group of the formula

optionally substituted with 1-4 substituents which are independently R¹, OR¹, S(O)_pR¹, C(O)R¹, C(O)OR¹, C(O)NR¹R², halogen, hydroxy, oxide, amino, cyano, or nitro;

B is phenyl, naphthyl, or pyridyl, optionally substituted with 1-4 substituents which are independently C₁-C₅linear or branched alkyl, C₁-C₅linear or branched haloalkyl, C₁-C₃alkoxy, hydroxy, oxide, amino, C₁-C₃alkylamino, C₁-C₆dialkylamino, halogen, cyano, or nitro;

L is

(a) —(CH₂)_m—O—(CH₂)_l—,

(b) —(CH₂)_m—(CH₂)_l—,

(c) —(CH₂)_m—C(O)—(CH₂)_l—,

(d) —(CH₂)_m—NR³—(CH₂)_l—,

(e) —(CH₂)_m—NR³C(O)—(CH₂)_l—,

(f) —(CH₂)_m—S—(CH₂)_l—,

(g) —(CH₂)_m—C(O)NR³—(CH₂)_l—, or

(h) a single bond;

m and l are integers independently selected from 0-4;

M is a pyridine ring, optionally substituted with 1-3 substituents which are independently C₁-C₅linear or branched alkyl, C₁-C₅linear or branched haloalkyl, C₁-C₃alkoxy, hydroxy, oxide, amino, C₁-C₃alkylamino, C₁-C₆dialkylamino, halogen, or nitro;

Q is:

(1) C(S)NR⁴R⁵;

(2) C(O)NR⁷—NR⁴R⁵;

(3) tetrazolyl;

(4) imidazolyl;

(5) imidazoline-2-yl;

(6) 1,3,4-oxadiazoline-2-yl;

(7) 1,3-thiazoline-2-yl;

(8) 5-thioxo-4,5-dihydro-1,3,4-thiazoline-2-yl;

(9) 5-oxo-4,5-dihydro-1,3,4-oxadiazoline-2-yl; or

(10) a group of the formula

wherein each of R¹, R², R³, R⁴and R⁵is independently

(a) hydrogen,

(b) C₁-C₅linear, branched, or cyclic alkyl,

(c) phenyl,

(d) C₁-C₃phenyl-alkyl,

(e) up to per-halo substituted C₁-C₅linear or branched alkyl, or

(f) —(CH₂)_q—X, where X is a tetrahydropyrane, tetrahydrofurane, 1,3-dioxolane, 1,4-dioxane, morpholine, thiomorpholine, piperazine, piperidine, piperidinone, tetrahydropyrimidone, pentamethylene sulfide, tetramethylene sulfide, dihydropyrane, dihydrofurane, dihydrothiophene, pyrrole, furan, thiophene, imidazole, pyrazole, thiazole, oxazole, isoxazole, isothiazole, triazole, pyridine, pyrimidine, pyridazine, pyrazine, triazine or; benzoxazole, indazole, quinoline, quinazoline, imidazopyrimidine or naphtyridine

R⁴and R⁵may additionally be taken together to form a 5 or 6 membered aliphatic ring, which may be interrupted by an atom selected from N, O or S, optionally substituted with 1-3 substituents which are independently C₁-C₅linear or branched alkyl, up to perhalo substituted C₁-C₅linear or branched alkyl, C₁-C₃alkoxy, hydroxy, oxo, carboxy, amino, C₁-C₃alkylamino, C₁-C₆dialkylamino, halogen, cyano, or nitro;

R⁶is independently

(a) hydrogen,

(b) C₁-C₅linear, branched, or cyclic alkyl,

(c) cyano,

(d) nitro,

(e) up to per-halo substituted C₁-C₅linear or branched alkyl, or

(f) —C(O)R⁷, where R⁷is C₁-C₅linear, branched, or cyclic alkyl;

R⁷is hydrogen or linear, branched, or cyclic C₁-C₅alkyl;

q is an integer 0, 1, 2, 3, or 4 and

p is an integer 0, 1, or 2.

2) A compound of claim 1 wherein B is phenyl or pyridinyl, optionally substituted with 1-4 halogen.

3) (canceled)

4) (canceled)

5) A compound of claim 1 wherein A and B follow one of the following combinations:

A=phenyl and B=phenyl,

A=indazolyl and B=phenyl,

A=quinolinyl and B=phenyl,

A=4H-benzo[1,3]dioxin-6-yl and B=phenyl;

A=phenyl and B=pyridyl,

A=indazolyl and B=pyridyl,

A=quinolinyl and B=pyridyl, or

A=4H-benzo[1,3]dioxin-6-yl and B=pyridyl.

6) A compound which is

N-[4-chloro-3-(trifluoromethyl)phenyl]-N′-(4-{[2-(hydrazinocarbonyl)pyridin-4-yl]oxy}phenyl)urea

N-(4-{[2-(hydrazinocarbonyl)pyridin-4-yl]oxy}phenyl)-N′-(2,2,4,4-tetrafluoro-4H-1,3-benzodioxin-6-yl)urea

N-[4-chloro-3-(trifluoromethyl)phenyl]-N′-[3-({2-[(2,2-dimethylhydrazino)carbonyl]pyridin-4-yl}oxy)phenyl]urea

4-{3-[({[4-chloro-3-(trifluoromethyl)phenyl]amino}carbonyl)amino]phenoxy}-N-piperidin-1-ylpyridine-2-carboxamide

N-piperidin-1-yl-4-[3-({[(2,2,4,4-tetrafluoro-4H-1,3-benzodioxin-6-yl)amino]carbonyl}amino)phenoxy]pyridine-2-carboxamide

4-{3-[({[4-chloro-3-(trifluoromethyl)phenyl]amino}carbonyl)amino]phenoxy}-N-morpholin-4-ylpyridine-2-carboxamide

N-morpholin-4-yl-4-[3-({[(2,2,4,4-tetrafluoro-4H-1,3-benzodioxin-6-yl)amino]carbonyl}amino)phenoxy]pyridine-2-carboxamide

4-[3-({[(1-methyl-1H-indazol-5-yl)amino]carbonyl}amino)phenoxy]-N-morpholin-4-ylpyridine-2-carboxamide

N-[4-chloro-3-(trifluoromethyl)phenyl]-N′-(4-{[2-(1H-tetrazol-5-yl)pyridin-4-yl]oxy}phenyl)urea

N-[4-chloro-3-(trifluoromethyl)phenyl]-N′-(4-{[2-(4,5-dihydro-1H-imidazol-2-yl)pyridin-4-yl]oxy}phenyl)urea

N-[4-chloro-3-(trifluoromethyl)phenyl]-N′-(4-{[2-(1,3,4-oxadiazol-2-yl)pyridin-4-yl]oxy}phenyl)urea

N-[4-chloro-3-(trifluoromethyl)phenyl]-N′-(4-{[2-(4-methyl-1,3-thiazol-2-yl)pyridin-4-yl]oxy}phenyl)urea

N-quinolin-6-yl-N′-(4-{[2-(5-thioxo-4,5-dihydro-1,3,4-thiadiazol-2-yl)pyridin-4-yl]oxy}phenyl)urea

N-[4-chloro-3-(trifluoromethyl)phenyl]-N′-(4-{[2-(5-oxo-4,5-dihydro-1,3,4-oxadiazol-2-yl)pyridin-4-yl]oxy}phenyl)urea

N-(4-{[2-(5-oxo-4,5-dihydro-1,3,4-oxadiazol-2-yl)pyridin-4-yl]oxy}phenyl)-N′-(2,2,4,4-tetrafluoro-4H-1,3-benzodioxin-6-yl)urea

4-{4-[({[4-chloro-3-(trifluoromethyl)phenyl]amino}carbonyl)amino]phenoxy}-N-methylpyridine-2-carboximidamide

4-{4-[({[4-chloro-3-(trifluoromethyl)phenyl]amino}carbonyl)amino]phenoxy}pyridine-2-carboximidamide

N-methyl-4-[4-({[(2,2,4,4-tetrafluoro-4H-1,3-benzodioxin-6-yl)amino]carbonyl}amino)phenoxy]pyridine-2-carboximidamide

N-methyl-4-(4-{[(quinolin-6-ylamino)carbonyl]amino}phenoxy)pyridine-2-carboximidamide

4-{4-[({[4-chloro-3-(trifluoromethyl)phenyl]amino}carbonyl)amino]phenoxy}pyridine-2-carbothioamide

4-(4-{[(quinolin-6-ylamino)carbonyl]amino}phenoxy)pyridine-2-carbothioamide or

4-[4-({[(1-methyl-1H-indazol-5-yl)amino]carbonyl}amino)phenoxy]pyridine-2-carbothioamide

7) A pharmaceutical composition which comprises an effective amount of at least one compound of claim 1 and a physiologically acceptable carrier.

8) A method for treating or preventing a hyper-proliferative disorder in a human or other mammal comprising administering to a human or other mammal in need thereof a compound of claim 1.

9) A method for treating or preventing a hyper-proliferative disorder in a human or other mammal comprising administering to a human or other mammal in need thereof a compound of claim 1 and an additional anti-proliferative agent.

10) A method for treating or preventing cancer in a human or other mammal comprising administering to a human or other mammal in need thereof a compound of claim 1 and a cytotoxic agent or cytostatic chemotherapeutic agent.

11) A method for treating or preventing a disease in a human or other mammal regulated by tyrosine kinase, associated with an aberration in the tyrosine kinase signal transduction pathway, comprising administering to a human or other mammal in need thereof a compound of claim 1.

12) A method for treating or preventing a disease in a human or other mammal mediated by the VEGF-induced signal transduction pathway, comprising administering to a human or other mammal in need thereof a compound of claim 1.

13) A method for treating or preventing a disease in a human or other mammal characterized by abnormal angiogenesis or hyperpermeability processes, comprising administering to a human or other mammal in need thereof a compound of claim 1.

14) A method for treating or preventing a disease in a human or other mammal characterized by abnormal angiogenesis or hyperpermeability processes, comprising administering to a human or other mammal in need thereof a compound of claim 1 simultaneously with another angiogenesis inhibiting agent in the same formulation or in separate formulations.

15) A method for treating or preventing one or more of the following conditions in humans and/or other mammals: tumor growth, retinopathy, ischemic retinal-vein occlusion, retinopathy of prematurity, age related macular degeneration; rheumatoid arthritis, psoriasis, a bolos disorder associated with subepidermal blister formation, including bullous pemphigoid, erythema multiforme, or dermatitis herpetiformis, comprising administering to a human or other mammal in need thereof a compound of claim 1.

16) A method for treating or preventing one or more of the following conditions in humans and/or other mammals: tumor growth, retinopathy, diabetic retinopathy, ischemic retinal-vein occlusion, retinopathy of prematurity, age related macular degeneration; rheumatoid arthritis, psoriasis, bullous disorder associated with subepidermal blister formation, bullous pemphigoid, erythema multiforme, and dermatitis herpetiformis, in combination with an infectious disease selected from the group consisting of: tuberculosis, Helicobacter pylori infection during peptic ulcer disease, Chaga's disease resulting from Trypanosoma cruzi infection, effects of Shiga-like toxin resulting from E. coli infection, effects of enterotoxin A resulting from Staphylococcus infection, meningococcal infection, and infections from Borrelia burgdorferi, Treponema pallidum, cytomegalovirus, influenza virus, Theiler's encephalomyelitis virus, and the human immunodeficiency virus (HIV),

said method comprising administering to a human or other mammal in need thereof a compound of claim 1.

17) A method for treating or preventing diseases mediated by the VEGF-induced signal transduction pathway comprising administering a compound selected from the group consisting of:

4-{4-[3-(4-Chloro-3-trifluoromethyl-phenyl)-ureido]-phenoxy}-pyridine-2-carbothioic acid amide;

4-{3-[3-(2,2,4,4-Tetrafluoro-4H-benzo[1,3]dioxin-6-yl)-ureido]-phenoxy}-pyridine-2-carboxylic acid (1-piperidyl)-amide;

4-{3-[3-(2,2,4,4-Tetrafluoro-4H-benzo[1,3]dioxin-6-yl)-ureido]-phenoxy}-pyridine-2-carboxylic acid (4-morpholino)-amide;

4-{3-[3-(1-Methyl-1H-indazol-5-yl)-ureido]-phenoxy}-pyridine-2-carboxylic acid (4-morpholino)-amide;

4-{4-[3-(4-Chloro-3-trifluoromethyl-phenyl)-ureido]-phenoxy}-pyridine-2-carboxamidine;

1-(4-Chloro-3-trifluoromethyl-phenyl)-3-{4-[2-(1H-tetrazol-5-yl)-pyridinyl-4-oxy]-phenyl}-urea;

1-(4-Chloro-3-trifluoromethyl-phenyl)-3-{4-[2-(4,5-dihydro-1H-imidazol-2-yl)-pyridinyl-4-oxy]-phenyl}-urea;

4-{4-[3-(4-Chloro-3-trifluoromethyl-phenyl)-ureido]-phenoxy}-N-methyl-pyridine-2-carboxamidine;

or a salt form, prodrug or metabolite thereof.

18) A method for treating or preventing cancer comprising administering a compound selected from the group consisting of:

4-(4-{[(quinolin-6-ylamino)carbonyl]amino}phenoxy)pyridine-2-carbothioamide

4-[4-({[(1-methyl-1H-indazol-5-yl)amino]carbonyl}amino)phenoxy]pyridine-2-carbothioamide,

or a salt form, prodrug or metabolite thereof.

19) (canceled)

20) (canceled)

21. (canceled)

22. (canceled)

23. (canceled)

24) (canceled)

25) (canceled)

26) A compound of claim 1 wherein L is —O— and B is phenyl, optionally substituted with 1-4 halogen.

27) A compound of formula (I)

or a pharmaceutically acceptable salt, wherein A is phenyl, naphthyl, indazolyl, quinolinyl, pyridyl, benzo[1,3]dioxolan-5-yl, 2,3-dihydro-benzo[1,4]dioxin-6-yl or 4H-benzo[1,3]dioxin-6-yl, optionally substituted with 1-4 substituents which are independently R¹and halogen,

L is —O— and B is phenyl, optionally substituted with 1-4 halogen;

Q is:

(1) C(S)NR⁴R⁵;

(2) C(O)NR⁷—NR⁴R⁵;

(3) tetrazolyl;

(4) imidazolyl;

(5) imidazoline-2-yl;

(6) 1,3,4-oxadiazoline-2-yl;

(7) 1,3-thiazoline-2-yl;

(8) 5-thioxo-4,5-dihydro-1,3,4-thiazoline-2-yl;

(9) 5-oxo-4,5-dihydro-1,3,4-oxadiazoline-2-yl; or

(10) a group of the formula

wherein each of R¹, R², R³, R⁴and R⁵is independently

(a) hydrogen,

(b) C₁-C₅linear, branched, or cyclic alkyl,

(c) phenyl,

(d) C₁-C₃phenyl-alkyl,

(e) up to per-halo substituted C₁-C₅linear or branched alkyl, or

(f) —(CH₂)_q—X, where X is tetrahydropyrane, tetrahydrofurane, 1,3-dioxolane, 1,4-dioxane, morpholine, thiomorpholine, piperazine, piperidine, piperidinone, tetrahydropyrimidone, pentamethylene sulfide, tetramethylene sulfide, dihydropyrane, dihydrofurane, dihydrothiophene, pyrrole, furan, thiophene, imidazole, pyrazole, thiazole, oxazole, isoxazole, isothiazole, triazole, pyridine, pyrimidine, pyridazine, pyrazine, triazine or benzoxazole, indazole, quinoline, quinazoline, imidazopyrimidine or naphtyridine;

R⁶is independently

(a) hydrogen,

(b) C₁-C₅linear, branched, or cyclic alkyl,

(c) cyano,

(d) nitro,

(e) up to per-halo substituted C₁-C₅linear or branched alkyl, or

(f) —C(O)R⁷, where R⁷is C₁-C₅linear, branched, or cyclic alkyl;

R⁷is hydrogen or linear, branched, or cyclic C₁-C₅alkyl;

q is an integer 0, 1, 2, 3, or 4 and

p is an integer 0, 1, or 2.

28) A compound of formula (I)

or a pharmaceutically acceptable salt thereof, wherein

A is

wherein A is optionally substituted with 1-4 substituents which are independently R¹, OR¹, S(O)_pR¹, C(O)R¹, C(O)OR¹, C(O)NR¹R², halogen, hydroxy, oxide, amino, cyano, or nitro;

B is phenyl, or pyridyl, optionally substituted with 1-4 substituents which are independently C₁-C₅linear or branched alkyl, C₁-C₅linear or branched haloalkyl, C₁-C₃alkoxy, hydroxy, oxide, amino, C₁-C₃alkylamino, C₁-C₆dialkylamino, halogen, cyano, or nitro;

L is

(a) —(CH₂)_m—O—(CH₂)_l—,

(b) —(CH₂)_m—(CH₂)_l—,

(c) —(CH₂)_m—C(O)—(CH₂)_l—,

(d) —(CH₂)_m—NR³—(CH₂)_l—,

(e) —(CH₂)_m—NR³C(O)—(CH₂)_l—,

(f) —(CH₂)_m—S—(CH₂)_l—,

(g) —(CH₂)_m—C(O)NR³—(CH₂)_l—, or

(h) a single bond;

m and l are integers independently selected from 0-4;

Q is:

(1) C(S)NR⁴R⁵;

(2) C(O)NR⁷—NR⁴R⁵;

(3) tetrazolyl;

(4) imidazolyl;

(5) imidazoline-2-yl;

(6) 1,3,4-oxadiazoline-2-yl;

(7) 1,3-thiazoline-2-yl;

(8) 5-thioxo-4,5-dihydro-1,3,4-thiazoline-2-yl;

(9) 5-oxo-4,5-dihydro-1,3,4-oxadiazoline-2-yl; or

(10) a group of the formula

wherein each of R¹, R², R³, R⁴and R⁵is independently

(a) hydrogen,

(b) C₁-C₅linear, branched, or cyclic alkyl,

(c) phenyl,

(d) C₁-C₃phenyl-alkyl,

(e) up to per-halo substituted C₁-C₅linear or branched alkyl, or

(f) —(CH₂)_q—X, where X is a tetrahydropyrane, tetrahydrofurane, 1,3-dioxolane, 1,4-dioxane, morpholine, thiomorpholine, piperazine, piperidine, piperidinone, tetrahydropyrimidone, pentamethylene sulfide, tetramethylene sulfide, dihydropyrane, dihydrofurane, dihydrothiophene, pyrrole, furan, thiophene, imidazole, pyrazole, thiazole, oxazole, isoxazole, isothiazole, triazole, pyridine, pyrimidine, pyridazine, pyrazine, triazine or benzoxazole, indazole, quinoline, quinazoline, imidazopyrimidine or naphtyridine;

R⁶is independently

(a) hydrogen,

(b) C₁-C₅linear, branched, or cyclic alkyl,

(c) cyano,

(d) nitro,

(e) up to per-halo substituted C₁-C₅linear or branched alkyl, or

(f) —C(O)R⁷, where R⁷is C₁-C₅linear, branched, or cyclic alkyl;

R⁷is hydrogen or linear, branched, or cyclic C₁-C₅alkyl;

q is an integer 0, 1, 2, 3, or 4 and

p is an integer 0, 1, or 2.

29) A compound of claim 28 wherein B is phenyl or pyridinyl, optionally substituted with 1-4 halogen.

30) A compound of claim 28 wherein L is —O— and B is phenyl or pyridinyl, optionally substituted with 1-4 halogen.

31) A compound as in claim 28 wherein B is phenyl or pyridyl, L is —O—, M a pyridine ring substituted only by Q, and Q is

C(S)NR⁴R⁵;

C(O)NR⁷—NR⁴R⁵;

or

a group of the formula

with each of R⁴and R⁵, independently:

(a) hydrogen,

(b) C₁-C₅linear, branched, or cyclic alkyl,

(c) phenyl,

(d) C₁-C₃phenyl-alkyl,

(e) up to per-halo substituted C₁-C₅linear or branched alkyl, or

(f) —(CH₂)_q—X, where the substituent X is pyridinyl and the variable q is preferably an integer 0 or 1, and

R⁶is:

(a) hydrogen,

(b) C₁-C₅linear, branched, or cyclic alkyl, or

(c) cyano.

32) A compound of formula (I)

or a pharmaceutically acceptable salt thereof, wherein

A is

wherein A is optionally substituted with 1-4 substituents which are independently R¹, OR¹, or halogen

B is phenyl or pyridinyl, optionally substituted with 1-4 substituents which are independently C₁-C₅linear or branched alkyl, C₁-C₅linear or branched haloalkyl, C₁-C₃alkoxy, hydroxy, oxide, amino, C₁-C₃alkylamino, C₁-C₆dialkylamino, halogen, cyano, or nitro,

L is —O—,

M is a pyridine ring,

Q is:

(1) C(S)NR⁴R⁵;

(2) C(O)NR⁷—NR⁴R⁵;

(3) tetrazolyl;

(4) imidazolyl;

(5) imidazoline-2-yl;

(6) 1,3,4-oxadiazoline-2-yl;

(7) 1,3-thiazoline-2-yl;

(8) 5-thioxo-4,5-dihydro-1,3,4-thiazoline-2-yl;

(9) 5-oxo-4,5-dihydro-1,3,4-oxadiazoline-2-yl; or

(10) a group of the formula

wherein each of R¹, R⁴and R⁵is independently

(a) hydrogen,

(b) C₁-C₅linear, branched, or cyclic alkyl,

(c) phenyl,

(d) C₁-C₃phenyl-alkyl,

(e) up to per-halo substituted C₁-C₅linear or branched alkyl, or

R⁶is independently

(a) hydrogen,

(b) C₁-C₅linear, branched, or cyclic alkyl,

(c) cyano,

(d) nitro,

(e) up to per-halo substituted C₁-C₅linear or branched alkyl, or

(f) —C(O)R⁷, where R⁷is C₁-C₅linear, branched, or cyclic alkyl;

R⁷is hydrogen or linear, branched, or cyclic C₁-C₅alkyl;

q is an integer 0, 1, 2, 3, or 4 and

p is an integer 0, 1, or 2.

33) A compound of claim 32 wherein B is phenyl or pyridinyl, substituted with 1-4 halogen.

34) A compound as in claim 32 wherein

M a pyridine ring substituted only by Q, and Q is

C(S)NR⁴R⁵;

C(O)NR⁷—NR⁴R⁵;

or

a group of the formula

with each of R⁴and R⁵, independently:

(a) hydrogen,

(b) C₁-C₅linear, branched, or cyclic alkyl,

(c) phenyl,

(d) C₁-C₃phenyl-alkyl,

(e) up to per-halo substituted C₁-C₅linear or branched alkyl, or

R⁶is:

(a) hydrogen,

(b) C₁-C₅linear, branched, or cyclic alkyl, or

(c) cyano.

35) An ester derivative of a compound of formula I of claim 1.

36) An ester derivative of a compound of formula I of claim 10.

37) A compound of formula (I)

or a pharmaceutically acceptable salt, wherein

A is phenyl;

L is —O— and B is phenyl, optionally substituted with 1-4 halogen;

Q is:

(1) C(S)NR⁴R⁵;

(2) C(O)NR⁷—NR⁴R⁵;

or

(3) a group of the formula

wherein each of R¹, R², R⁴and R⁵is independently

(a) hydrogen,

(b) C₁-C₅linear, branched, or cyclic alkyl,

(c) phenyl,

(d) C₁-C₃phenyl-alkyl,

(e) up to per-halo substituted C₁-C₅linear or branched alkyl, or

(f) —(CH₂)_q—X, where X is pyridine;

R⁶is independently

(a) hydrogen,

(b) C₁-C₅linear, branched, or cyclic alkyl, or

(c) up to per-halo substituted C₁-C₅linear or branched alkyl, or

q is an integer 0, 1, 2, 3, or 4 and

p is an integer 0, 1, or 2.

38) A compound of formula (I)

or a pharmaceutically acceptable salt, wherein

A is pyridine optionally substituted with 1-4 substituents which are independently R¹, OR¹, S(O)_pR¹, C(O)R¹, C(O)OR¹, C(O)NR¹R², halogen, hydroxy, oxide, amino, cyano, or nitro;

L is —O— and B is phenyl, optionally substituted with 1-4 halogen;

Q is:

(1) C(S)NR⁴R⁵;

(2) C(O)NR⁷—NR⁴R⁵;

or

(3) a group of the formula

wherein each of R¹, R², R⁴and R⁵is independently

(a) hydrogen,

(b) C₁-C₅linear, branched, or cyclic alkyl,

(c) phenyl,

(d) C₁-C₃phenyl-alkyl,

(e) up to per-halo substituted C₁-C₅linear or branched alkyl, or

(f) —(CH₂)_q—X, where X is pyridine;

R⁶is independently

(a) hydrogen,

(b) C₁-C₅linear, branched, or cyclic alkyl, or

(c) up to per-halo substituted C₁-C₅linear or branched alkyl, or

q is an integer 0, 1, 2, 3, or 4 and

p is an integer 0, 1, or 2.

39) A compound of formula (I)

or a pharmaceutically acceptable salt, wherein

A is pyrazole optionally substituted with 1-4 substituents which are independently R¹, OR¹, S(O)_pR¹, C(O)R¹, C(O)OR¹, C(O)NR¹R², halogen, hydroxy, oxide, amino, cyano, or nitro;

L is —O— and B is phenyl, optionally substituted with 1-4 halogen;

Q is:

(1) C(S)NR⁴R⁵;

(2) C(O)NR⁷—NR⁴R⁵;

or

(3) a group of the formula

wherein each of R¹, R², R⁴and R⁵is independently

(a) hydrogen,

(b) C₁-C₅linear, branched, or cyclic alkyl,

(c) phenyl,

(d) C₁-C₃phenyl-alkyl,

(e) up to per-halo substituted C₁-C₅linear or branched alkyl, or

(f) —(CH₂)_q—X, where X is pyridine;

R⁶is independently

(a) hydrogen,

(b) C₁-C₅linear, branched, or cyclic alkyl, or

(c) up to per-halo substituted C₁-C₅linear or branched alkyl, or

q is an integer 0, 1, 2, 3, or 4 and

p is an integer 0, 1, or 2.

40) A pharmaceutical composition which comprises an effective amount of at least one compound of claim 27 and a physiologically acceptable carrier.

41) A pharmaceutical composition which comprises an effective amount of at least one compound of claim 27 and a physiologically acceptable carrier.

42) A pharmaceutical composition which comprises an effective amount of at least one compound of claim 28 and a physiologically acceptable carrier.

43) A pharmaceutical composition which comprises an effective amount of at least one compound of claim 31 and a physiologically acceptable carrier.

44) A pharmaceutical composition which comprises an effective amount of at least one compound of claim 32 and a physiologically acceptable carrier.

45) A pharmaceutical composition which comprises an effective amount of at least one compound of claim 37 and a physiologically acceptable carrier.

46) A pharmaceutical composition which comprises an effective amount of at least one compound of claim 38 and a physiologically acceptable carrier.

47) A pharmaceutical composition which comprises an effective amount of at least one compound of claim 39 and a physiologically acceptable carrier.