CA2636695A1 - Process for preparing substituted biphenyls - Google Patents
Process for preparing substituted biphenyls Download PDFInfo
- Publication number
- CA2636695A1 CA2636695A1 CA002636695A CA2636695A CA2636695A1 CA 2636695 A1 CA2636695 A1 CA 2636695A1 CA 002636695 A CA002636695 A CA 002636695A CA 2636695 A CA2636695 A CA 2636695A CA 2636695 A1 CA2636695 A1 CA 2636695A1
- Authority
- CA
- Canada
- Prior art keywords
- palladium
- process according
- fluoro
- iii
- nitro
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 235000010290 biphenyl Nutrition 0.000 title claims abstract description 8
- 150000004074 biphenyls Chemical class 0.000 title claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 6
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims abstract description 84
- 229910052763 palladium Inorganic materials 0.000 claims abstract description 36
- 239000003054 catalyst Substances 0.000 claims abstract description 22
- 239000003446 ligand Substances 0.000 claims abstract description 19
- -1 nitro, amino Chemical group 0.000 claims abstract description 16
- VIGVRXYWWFPORY-UHFFFAOYSA-N diphenylborinic acid Chemical compound C=1C=CC=CC=1B(O)C1=CC=CC=C1 VIGVRXYWWFPORY-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000002904 solvent Substances 0.000 claims abstract description 11
- 150000001875 compounds Chemical class 0.000 claims abstract description 10
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims abstract description 9
- 239000000460 chlorine Chemical group 0.000 claims abstract description 8
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical group [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052801 chlorine Chemical group 0.000 claims abstract description 7
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 6
- 239000011737 fluorine Substances 0.000 claims abstract description 6
- 229910052736 halogen Inorganic materials 0.000 claims abstract description 6
- 150000002367 halogens Chemical group 0.000 claims abstract description 6
- 230000003647 oxidation Effects 0.000 claims abstract description 6
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 6
- 150000003839 salts Chemical class 0.000 claims abstract description 6
- 125000001424 substituent group Chemical group 0.000 claims abstract description 5
- 125000004093 cyano group Chemical group *C#N 0.000 claims abstract description 4
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 claims abstract description 4
- 101100294106 Caenorhabditis elegans nhr-3 gene Chemical group 0.000 claims abstract description 3
- 125000001153 fluoro group Chemical group F* 0.000 claims abstract description 3
- 125000004169 (C1-C6) alkyl group Chemical group 0.000 claims abstract 3
- 125000004178 (C1-C4) alkyl group Chemical group 0.000 claims abstract 2
- 125000006727 (C1-C6) alkenyl group Chemical group 0.000 claims abstract 2
- 125000004191 (C1-C6) alkoxy group Chemical group 0.000 claims abstract 2
- 125000006728 (C1-C6) alkynyl group Chemical group 0.000 claims abstract 2
- 125000000171 (C1-C6) haloalkyl group Chemical group 0.000 claims abstract 2
- 125000004399 C1-C4 alkenyl group Chemical group 0.000 claims abstract 2
- 238000000034 method Methods 0.000 claims description 34
- 230000008569 process Effects 0.000 claims description 33
- RIOQSEWOXXDEQQ-UHFFFAOYSA-N triphenylphosphine Chemical compound C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 RIOQSEWOXXDEQQ-UHFFFAOYSA-N 0.000 claims description 22
- 238000006243 chemical reaction Methods 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- GTIPIQTXJYDTPL-UHFFFAOYSA-N bis(3,4-dichlorophenyl)borinic acid Chemical compound C=1C=C(Cl)C(Cl)=CC=1B(O)C1=CC=C(Cl)C(Cl)=C1 GTIPIQTXJYDTPL-UHFFFAOYSA-N 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- PIBWKRNGBLPSSY-UHFFFAOYSA-L palladium(II) chloride Chemical compound Cl[Pd]Cl PIBWKRNGBLPSSY-UHFFFAOYSA-L 0.000 claims description 6
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 claims description 6
- 239000003960 organic solvent Substances 0.000 claims description 5
- BWHDROKFUHTORW-UHFFFAOYSA-N tritert-butylphosphane Chemical compound CC(C)(C)P(C(C)(C)C)C(C)(C)C BWHDROKFUHTORW-UHFFFAOYSA-N 0.000 claims description 5
- 150000002940 palladium Chemical class 0.000 claims description 4
- 239000007858 starting material Substances 0.000 claims description 4
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 2
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 claims description 2
- YJVFFLUZDVXJQI-UHFFFAOYSA-L palladium(ii) acetate Chemical compound [Pd+2].CC([O-])=O.CC([O-])=O YJVFFLUZDVXJQI-UHFFFAOYSA-L 0.000 claims description 2
- 125000001273 sulfonato group Chemical group [O-]S(*)(=O)=O 0.000 claims description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims 2
- SSTBBDQVQSJATR-UHFFFAOYSA-N 1-bromo-2-fluorocyclohexa-2,4-dien-1-amine Chemical compound NC1(CC=CC=C1F)Br SSTBBDQVQSJATR-UHFFFAOYSA-N 0.000 claims 1
- UFALHRXVPOKLAH-UHFFFAOYSA-N 6-chloro-1-fluoro-6-nitrocyclohexa-1,3-diene Chemical compound ClC1(CC=CC=C1F)[N+](=O)[O-] UFALHRXVPOKLAH-UHFFFAOYSA-N 0.000 claims 1
- 125000004916 (C1-C6) alkylcarbonyl group Chemical group 0.000 abstract 1
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 26
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 13
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 239000000243 solution Substances 0.000 description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 9
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 9
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 8
- 239000002585 base Substances 0.000 description 8
- HXITXNWTGFUOAU-UHFFFAOYSA-N phenylboronic acid Chemical compound OB(O)C1=CC=CC=C1 HXITXNWTGFUOAU-UHFFFAOYSA-N 0.000 description 7
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 6
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 6
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 6
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 6
- 229910052783 alkali metal Inorganic materials 0.000 description 5
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 5
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 4
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 4
- YXHHAHPURDBIIG-UHFFFAOYSA-N 1,2-dichloro-4-(5-fluoro-2-nitrophenyl)benzene Chemical group [O-][N+](=O)C1=CC=C(F)C=C1C1=CC=C(Cl)C(Cl)=C1 YXHHAHPURDBIIG-UHFFFAOYSA-N 0.000 description 3
- YLMFXCIATJJKQL-UHFFFAOYSA-N 2-bromo-4-fluoroaniline Chemical compound NC1=CC=C(F)C=C1Br YLMFXCIATJJKQL-UHFFFAOYSA-N 0.000 description 3
- KQOOFMWRLDRDAX-UHFFFAOYSA-N 2-chloro-4-fluoro-1-nitrobenzene Chemical compound [O-][N+](=O)C1=CC=C(F)C=C1Cl KQOOFMWRLDRDAX-UHFFFAOYSA-N 0.000 description 3
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- 229910000288 alkali metal carbonate Inorganic materials 0.000 description 3
- 150000008041 alkali metal carbonates Chemical class 0.000 description 3
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 3
- BTANRVKWQNVYAZ-UHFFFAOYSA-N butan-2-ol Chemical compound CCC(C)O BTANRVKWQNVYAZ-UHFFFAOYSA-N 0.000 description 3
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 3
- 150000008422 chlorobenzenes Chemical class 0.000 description 3
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 3
- WRECIMRULFAWHA-UHFFFAOYSA-N trimethyl borate Chemical compound COB(OC)OC WRECIMRULFAWHA-UHFFFAOYSA-N 0.000 description 3
- PFJVHQGCYXGWIT-UHFFFAOYSA-N 1,2-dichloro-3-(2-chloro-6-nitrophenyl)benzene Chemical group [O-][N+](=O)C1=CC=CC(Cl)=C1C1=CC=CC(Cl)=C1Cl PFJVHQGCYXGWIT-UHFFFAOYSA-N 0.000 description 2
- FVFDIZJMIPDFBX-UHFFFAOYSA-N 1,2-dichloro-3-(2-fluoro-6-nitrophenyl)benzene Chemical group [O-][N+](=O)C1=CC=CC(F)=C1C1=CC=CC(Cl)=C1Cl FVFDIZJMIPDFBX-UHFFFAOYSA-N 0.000 description 2
- ZMQWYDOJTBHUMT-UHFFFAOYSA-N 2-(2,3-dichlorophenyl)-3-fluoroaniline Chemical compound NC1=CC=CC(F)=C1C1=CC=CC(Cl)=C1Cl ZMQWYDOJTBHUMT-UHFFFAOYSA-N 0.000 description 2
- QUVGVAKQHNJQNN-UHFFFAOYSA-N 2-(3,4-dichlorophenyl)-4-fluoroaniline Chemical compound NC1=CC=C(F)C=C1C1=CC=C(Cl)C(Cl)=C1 QUVGVAKQHNJQNN-UHFFFAOYSA-N 0.000 description 2
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 2
- 125000001494 2-propynyl group Chemical group [H]C#CC([H])([H])* 0.000 description 2
- AGFLGYGJUYVWFX-UHFFFAOYSA-N 3-chloro-2-(2,3-dichlorophenyl)aniline Chemical compound NC1=CC=CC(Cl)=C1C1=CC=CC(Cl)=C1Cl AGFLGYGJUYVWFX-UHFFFAOYSA-N 0.000 description 2
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 2
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical group OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 229910001860 alkaline earth metal hydroxide Inorganic materials 0.000 description 2
- 239000008346 aqueous phase Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 238000004440 column chromatography Methods 0.000 description 2
- 239000012043 crude product Substances 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000006392 deoxygenation reaction Methods 0.000 description 2
- 150000002170 ethers Chemical class 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 239000011541 reaction mixture Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- JRMUNVKIHCOMHV-UHFFFAOYSA-M tetrabutylammonium bromide Chemical compound [Br-].CCCC[N+](CCCC)(CCCC)CCCC JRMUNVKIHCOMHV-UHFFFAOYSA-M 0.000 description 2
- 239000008096 xylene Substances 0.000 description 2
- APLLTRQADCLARY-UHFFFAOYSA-N 1,2-dichloro-3-(4-chloro-2-nitrophenyl)benzene Chemical group [O-][N+](=O)C1=CC(Cl)=CC=C1C1=CC=CC(Cl)=C1Cl APLLTRQADCLARY-UHFFFAOYSA-N 0.000 description 1
- KIRHSYZCFYTULB-UHFFFAOYSA-N 1,2-dichloro-3-(4-fluoro-2-nitrophenyl)benzene Chemical group [O-][N+](=O)C1=CC(F)=CC=C1C1=CC=CC(Cl)=C1Cl KIRHSYZCFYTULB-UHFFFAOYSA-N 0.000 description 1
- YIQVCDAQEIPTHZ-UHFFFAOYSA-N 1,2-dichloro-3-(5-chloro-2-nitrophenyl)benzene Chemical group [O-][N+](=O)C1=CC=C(Cl)C=C1C1=CC=CC(Cl)=C1Cl YIQVCDAQEIPTHZ-UHFFFAOYSA-N 0.000 description 1
- OVNDGKOXVUKEOA-UHFFFAOYSA-N 1,2-dichloro-3-(5-fluoro-2-nitrophenyl)benzene Chemical group [O-][N+](=O)C1=CC=C(F)C=C1C1=CC=CC(Cl)=C1Cl OVNDGKOXVUKEOA-UHFFFAOYSA-N 0.000 description 1
- AERSMUAHBGZZEZ-UHFFFAOYSA-N 1,2-dichloro-4-(4-chloro-2-nitrophenyl)benzene Chemical group [O-][N+](=O)C1=CC(Cl)=CC=C1C1=CC=C(Cl)C(Cl)=C1 AERSMUAHBGZZEZ-UHFFFAOYSA-N 0.000 description 1
- JVLSAPIKBGWKTN-UHFFFAOYSA-N 1,2-dichloro-4-(4-fluoro-2-nitrophenyl)benzene Chemical group [O-][N+](=O)C1=CC(F)=CC=C1C1=CC=C(Cl)C(Cl)=C1 JVLSAPIKBGWKTN-UHFFFAOYSA-N 0.000 description 1
- DWDNNXKDJGJLHX-UHFFFAOYSA-N 1,2-dichloro-4-(5-chloro-2-nitrophenyl)benzene Chemical group [O-][N+](=O)C1=CC=C(Cl)C=C1C1=CC=C(Cl)C(Cl)=C1 DWDNNXKDJGJLHX-UHFFFAOYSA-N 0.000 description 1
- KZBLLQAEHAZKFY-UHFFFAOYSA-N 1,2-difluoro-3-(4-fluoro-2-nitrophenyl)benzene Chemical group [O-][N+](=O)C1=CC(F)=CC=C1C1=CC=CC(F)=C1F KZBLLQAEHAZKFY-UHFFFAOYSA-N 0.000 description 1
- BLDNGEJDAWKERY-UHFFFAOYSA-N 1,2-difluoro-3-(5-fluoro-2-nitrophenyl)benzene Chemical group [O-][N+](=O)C1=CC=C(F)C=C1C1=CC=CC(F)=C1F BLDNGEJDAWKERY-UHFFFAOYSA-N 0.000 description 1
- LLRGOBXTEFJHSK-UHFFFAOYSA-N 1,2-difluoro-4-(4-fluoro-2-nitrophenyl)benzene Chemical group [O-][N+](=O)C1=CC(F)=CC=C1C1=CC=C(F)C(F)=C1 LLRGOBXTEFJHSK-UHFFFAOYSA-N 0.000 description 1
- NSMOUFACVSALCH-UHFFFAOYSA-N 1,2-difluoro-4-(5-fluoro-2-nitrophenyl)benzene Chemical group [O-][N+](=O)C1=CC=C(F)C=C1C1=CC=C(F)C(F)=C1 NSMOUFACVSALCH-UHFFFAOYSA-N 0.000 description 1
- RHRKBWLUGYYYSO-UHFFFAOYSA-N 1-(2,3-dichlorophenyl)-3-fluoro-2-nitrobenzene Chemical group [O-][N+](=O)C1=C(F)C=CC=C1C1=CC=CC(Cl)=C1Cl RHRKBWLUGYYYSO-UHFFFAOYSA-N 0.000 description 1
- SXTACEGXFDMHGM-UHFFFAOYSA-N 1-(2,3-difluorophenyl)-3-fluoro-2-nitrobenzene Chemical group [O-][N+](=O)C1=C(F)C=CC=C1C1=CC=CC(F)=C1F SXTACEGXFDMHGM-UHFFFAOYSA-N 0.000 description 1
- WHVCYMQLHBYJGD-UHFFFAOYSA-N 1-(3,4-dichlorophenyl)-3-fluoro-2-nitrobenzene Chemical group [O-][N+](=O)C1=C(F)C=CC=C1C1=CC=C(Cl)C(Cl)=C1 WHVCYMQLHBYJGD-UHFFFAOYSA-N 0.000 description 1
- ILYNNIOEMKQKLX-UHFFFAOYSA-N 1-(3,4-difluorophenyl)-3-fluoro-2-nitrobenzene Chemical group [O-][N+](=O)C1=C(F)C=CC=C1C1=CC=C(F)C(F)=C1 ILYNNIOEMKQKLX-UHFFFAOYSA-N 0.000 description 1
- CXBVDHFLPMICSN-UHFFFAOYSA-N 1-(3-chloro-2-nitrophenyl)-2,3-difluorobenzene Chemical group [O-][N+](=O)C1=C(Cl)C=CC=C1C1=CC=CC(F)=C1F CXBVDHFLPMICSN-UHFFFAOYSA-N 0.000 description 1
- UBYBMSGRISVSKB-UHFFFAOYSA-N 1-(4-chloro-2-nitrophenyl)-2,3-difluorobenzene Chemical group [O-][N+](=O)C1=CC(Cl)=CC=C1C1=CC=CC(F)=C1F UBYBMSGRISVSKB-UHFFFAOYSA-N 0.000 description 1
- HCMBGEIFZMXLFQ-UHFFFAOYSA-N 1-chloro-2-(3,4-dichlorophenyl)-3-nitrobenzene Chemical group [O-][N+](=O)C1=CC=CC(Cl)=C1C1=CC=C(Cl)C(Cl)=C1 HCMBGEIFZMXLFQ-UHFFFAOYSA-N 0.000 description 1
- BFCFYVKQTRLZHA-UHFFFAOYSA-N 1-chloro-2-nitrobenzene Chemical class [O-][N+](=O)C1=CC=CC=C1Cl BFCFYVKQTRLZHA-UHFFFAOYSA-N 0.000 description 1
- LXSBWHJKEFFBIF-UHFFFAOYSA-N 1-chloro-3-(2,3-dichlorophenyl)-2-nitrobenzene Chemical group [O-][N+](=O)C1=C(Cl)C=CC=C1C1=CC=CC(Cl)=C1Cl LXSBWHJKEFFBIF-UHFFFAOYSA-N 0.000 description 1
- XWPVGHXUFIKYPN-UHFFFAOYSA-N 1-chloro-3-(3,4-dichlorophenyl)-2-nitrobenzene Chemical group [O-][N+](=O)C1=C(Cl)C=CC=C1C1=CC=C(Cl)C(Cl)=C1 XWPVGHXUFIKYPN-UHFFFAOYSA-N 0.000 description 1
- 238000005160 1H NMR spectroscopy Methods 0.000 description 1
- XBFKGNTXACBSLF-UHFFFAOYSA-N 2-(2,3-dichlorophenyl)-4-fluoroaniline Chemical compound NC1=CC=C(F)C=C1C1=CC=CC(Cl)=C1Cl XBFKGNTXACBSLF-UHFFFAOYSA-N 0.000 description 1
- DFRMRPIZJLXQHM-UHFFFAOYSA-N 2-(2,3-dichlorophenyl)-5-fluoroaniline Chemical compound NC1=CC(F)=CC=C1C1=CC=CC(Cl)=C1Cl DFRMRPIZJLXQHM-UHFFFAOYSA-N 0.000 description 1
- URIWPMWEWFGJNK-UHFFFAOYSA-N 2-(2,3-dichlorophenyl)-6-fluoroaniline Chemical compound NC1=C(F)C=CC=C1C1=CC=CC(Cl)=C1Cl URIWPMWEWFGJNK-UHFFFAOYSA-N 0.000 description 1
- OIVOSCLTTDMTJC-UHFFFAOYSA-N 2-(2,3-difluorophenyl)-5-fluoroaniline Chemical compound NC1=CC(F)=CC=C1C1=CC=CC(F)=C1F OIVOSCLTTDMTJC-UHFFFAOYSA-N 0.000 description 1
- HYMJHICINZINEY-UHFFFAOYSA-N 2-(3,4-dichlorophenyl)-1-fluoro-3-nitrobenzene Chemical group [O-][N+](=O)C1=CC=CC(F)=C1C1=CC=C(Cl)C(Cl)=C1 HYMJHICINZINEY-UHFFFAOYSA-N 0.000 description 1
- LFYPHWJBBBHIRS-UHFFFAOYSA-N 2-(3,4-dichlorophenyl)-3-fluoroaniline Chemical compound NC1=CC=CC(F)=C1C1=CC=C(Cl)C(Cl)=C1 LFYPHWJBBBHIRS-UHFFFAOYSA-N 0.000 description 1
- YQKXYKPLIIJUQZ-UHFFFAOYSA-N 2-(3,4-dichlorophenyl)-5-fluoroaniline Chemical compound NC1=CC(F)=CC=C1C1=CC=C(Cl)C(Cl)=C1 YQKXYKPLIIJUQZ-UHFFFAOYSA-N 0.000 description 1
- XAYULYHGYVNJGE-UHFFFAOYSA-N 2-(3,4-dichlorophenyl)-6-fluoroaniline Chemical compound NC1=C(F)C=CC=C1C1=CC=C(Cl)C(Cl)=C1 XAYULYHGYVNJGE-UHFFFAOYSA-N 0.000 description 1
- BIAWATFHDQGFKJ-UHFFFAOYSA-N 2-(3,4-difluorophenyl)-1-fluoro-3-nitrobenzene Chemical group [O-][N+](=O)C1=CC=CC(F)=C1C1=CC=C(F)C(F)=C1 BIAWATFHDQGFKJ-UHFFFAOYSA-N 0.000 description 1
- RDYCXGJEEVMBNT-UHFFFAOYSA-N 2-(3,4-difluorophenyl)-5-fluoroaniline Chemical compound NC1=CC(F)=CC=C1C1=CC=C(F)C(F)=C1 RDYCXGJEEVMBNT-UHFFFAOYSA-N 0.000 description 1
- DRQHOOQROILMLQ-UHFFFAOYSA-N 2-(3,4-difluorophenyl)-6-fluoroaniline Chemical compound NC1=C(F)C=CC=C1C1=CC=C(F)C(F)=C1 DRQHOOQROILMLQ-UHFFFAOYSA-N 0.000 description 1
- VGYVBEJDXIPSDL-UHFFFAOYSA-N 2-bromo-4-fluoro-1-nitrobenzene Chemical compound [O-][N+](=O)C1=CC=C(F)C=C1Br VGYVBEJDXIPSDL-UHFFFAOYSA-N 0.000 description 1
- XRAKCYJTJGTSMM-UHFFFAOYSA-N 2-chloro-4-fluoroaniline Chemical compound NC1=CC=C(F)C=C1Cl XRAKCYJTJGTSMM-UHFFFAOYSA-N 0.000 description 1
- YMYMSTOHVBCLAT-UHFFFAOYSA-N 2-chloro-6-(2,3-dichlorophenyl)aniline Chemical compound NC1=C(Cl)C=CC=C1C1=CC=CC(Cl)=C1Cl YMYMSTOHVBCLAT-UHFFFAOYSA-N 0.000 description 1
- PADZMJVDPWJYMR-UHFFFAOYSA-N 2-chloro-6-(2,3-difluorophenyl)aniline Chemical compound NC1=C(Cl)C=CC=C1C1=CC=CC(F)=C1F PADZMJVDPWJYMR-UHFFFAOYSA-N 0.000 description 1
- PQCBFQVQSSYYOH-UHFFFAOYSA-N 2-chloro-6-(3,4-dichlorophenyl)aniline Chemical compound NC1=C(Cl)C=CC=C1C1=CC=C(Cl)C(Cl)=C1 PQCBFQVQSSYYOH-UHFFFAOYSA-N 0.000 description 1
- IHAASVFXAUFPPI-UHFFFAOYSA-N 2-chloro-6-(3,4-difluorophenyl)aniline Chemical compound NC1=C(Cl)C=CC=C1C1=CC=C(F)C(F)=C1 IHAASVFXAUFPPI-UHFFFAOYSA-N 0.000 description 1
- 125000006325 2-propenyl amino group Chemical group [H]C([H])=C([H])C([H])([H])N([H])* 0.000 description 1
- 125000006321 2-propynyl amino group Chemical group [H]C#CC([H])([H])N([H])* 0.000 description 1
- MXPSZUOPRWSTOO-UHFFFAOYSA-N 3-chloro-2-(3,4-dichlorophenyl)aniline Chemical compound NC1=CC=CC(Cl)=C1C1=CC=C(Cl)C(Cl)=C1 MXPSZUOPRWSTOO-UHFFFAOYSA-N 0.000 description 1
- TVMHSOCMIQQJRT-UHFFFAOYSA-N 3-chloro-2-(3,4-difluorophenyl)aniline Chemical compound NC1=CC=CC(Cl)=C1C1=CC=C(F)C(F)=C1 TVMHSOCMIQQJRT-UHFFFAOYSA-N 0.000 description 1
- VPLJPEVZYAUABC-UHFFFAOYSA-N 4-(4-chloro-2-nitrophenyl)-1,2-difluorobenzene Chemical group [O-][N+](=O)C1=CC(Cl)=CC=C1C1=CC=C(F)C(F)=C1 VPLJPEVZYAUABC-UHFFFAOYSA-N 0.000 description 1
- JDSOXBOZCODIED-UHFFFAOYSA-N 4-chloro-2-(2,3-dichlorophenyl)aniline Chemical compound NC1=CC=C(Cl)C=C1C1=CC=CC(Cl)=C1Cl JDSOXBOZCODIED-UHFFFAOYSA-N 0.000 description 1
- ZVVSZIIWYIBBHP-UHFFFAOYSA-N 4-chloro-2-(2,3-difluorophenyl)aniline Chemical compound NC1=CC=C(Cl)C=C1C1=CC=CC(F)=C1F ZVVSZIIWYIBBHP-UHFFFAOYSA-N 0.000 description 1
- DXFLLVKXHAJKJE-UHFFFAOYSA-N 4-chloro-2-(3,4-dichlorophenyl)aniline Chemical compound NC1=CC=C(Cl)C=C1C1=CC=C(Cl)C(Cl)=C1 DXFLLVKXHAJKJE-UHFFFAOYSA-N 0.000 description 1
- XQHMHDXGKMRROT-UHFFFAOYSA-N 4-chloro-2-(3,4-difluorophenyl)aniline Chemical compound NC1=CC=C(Cl)C=C1C1=CC=C(F)C(F)=C1 XQHMHDXGKMRROT-UHFFFAOYSA-N 0.000 description 1
- BCJVBDBJSMFBRW-UHFFFAOYSA-N 4-diphenylphosphanylbutyl(diphenyl)phosphane Chemical compound C=1C=CC=CC=1P(C=1C=CC=CC=1)CCCCP(C=1C=CC=CC=1)C1=CC=CC=C1 BCJVBDBJSMFBRW-UHFFFAOYSA-N 0.000 description 1
- WHAZWDLAWQCBIZ-UHFFFAOYSA-N 5-chloro-2-(2,3-dichlorophenyl)aniline Chemical compound NC1=CC(Cl)=CC=C1C1=CC=CC(Cl)=C1Cl WHAZWDLAWQCBIZ-UHFFFAOYSA-N 0.000 description 1
- XMCZLWLWEPTRIR-UHFFFAOYSA-N 5-chloro-2-(2,3-difluorophenyl)aniline Chemical compound NC1=CC(Cl)=CC=C1C1=CC=CC(F)=C1F XMCZLWLWEPTRIR-UHFFFAOYSA-N 0.000 description 1
- BXNJXTOEKVLDEK-UHFFFAOYSA-N 5-chloro-2-(3,4-dichlorophenyl)aniline Chemical compound NC1=CC(Cl)=CC=C1C1=CC=C(Cl)C(Cl)=C1 BXNJXTOEKVLDEK-UHFFFAOYSA-N 0.000 description 1
- KJAZSYIRSXIFNC-UHFFFAOYSA-N 5-chloro-2-(3,4-difluorophenyl)aniline Chemical compound NC1=CC(Cl)=CC=C1C1=CC=C(F)C(F)=C1 KJAZSYIRSXIFNC-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 1
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 1
- BZLVMXJERCGZMT-UHFFFAOYSA-N Methyl tert-butyl ether Chemical compound COC(C)(C)C BZLVMXJERCGZMT-UHFFFAOYSA-N 0.000 description 1
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 1
- SVYKKECYCPFKGB-UHFFFAOYSA-N N,N-dimethylcyclohexylamine Chemical compound CN(C)C1CCCCC1 SVYKKECYCPFKGB-UHFFFAOYSA-N 0.000 description 1
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 1
- 239000012696 Pd precursors Substances 0.000 description 1
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 description 1
- 239000004721 Polyphenylene oxide Chemical group 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 150000005347 biaryls Chemical group 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000002051 biphasic effect Effects 0.000 description 1
- HTJWUNNIRKDDIV-UHFFFAOYSA-N bis(1-adamantyl)-butylphosphane Chemical compound C1C(C2)CC(C3)CC2CC13P(CCCC)C1(C2)CC(C3)CC2CC3C1 HTJWUNNIRKDDIV-UHFFFAOYSA-N 0.000 description 1
- SKNMPURKHPVJQT-UHFFFAOYSA-N bis(2,3-dichlorophenyl)borinic acid Chemical compound C=1C=CC(Cl)=C(Cl)C=1B(O)C1=CC=CC(Cl)=C1Cl SKNMPURKHPVJQT-UHFFFAOYSA-N 0.000 description 1
- JXOGOODYRFHEIH-UHFFFAOYSA-N bis(2,3-difluorophenyl)borinic acid Chemical compound C=1C=CC(F)=C(F)C=1B(O)C1=CC=CC(F)=C1F JXOGOODYRFHEIH-UHFFFAOYSA-N 0.000 description 1
- CSJGMJBWMUVAQZ-UHFFFAOYSA-N bis(3,4-difluorophenyl)borinic acid Chemical compound C=1C=C(F)C(F)=CC=1B(O)C1=CC=C(F)C(F)=C1 CSJGMJBWMUVAQZ-UHFFFAOYSA-N 0.000 description 1
- GYRPPHBSPHLAMX-UHFFFAOYSA-N bis(4-chlorophenyl)borinic acid Chemical compound C=1C=C(Cl)C=CC=1B(O)C1=CC=C(Cl)C=C1 GYRPPHBSPHLAMX-UHFFFAOYSA-N 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006880 cross-coupling reaction Methods 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- LCSNDSFWVKMJCT-UHFFFAOYSA-N dicyclohexyl-(2-phenylphenyl)phosphane Chemical group C1CCCCC1P(C=1C(=CC=CC=1)C=1C=CC=CC=1)C1CCCCC1 LCSNDSFWVKMJCT-UHFFFAOYSA-N 0.000 description 1
- SBZXBUIDTXKZTM-UHFFFAOYSA-N diglyme Chemical compound COCCOCCOC SBZXBUIDTXKZTM-UHFFFAOYSA-N 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000000855 fungicidal effect Effects 0.000 description 1
- 238000002290 gas chromatography-mass spectrometry Methods 0.000 description 1
- 238000000589 high-performance liquid chromatography-mass spectrometry Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 1
- 229910052808 lithium carbonate Inorganic materials 0.000 description 1
- RMXGWLUCCKWPGK-UHFFFAOYSA-M magnesium;1,2-dichlorobenzene-5-ide;bromide Chemical compound [Mg+2].[Br-].ClC1=CC=[C-]C=C1Cl RMXGWLUCCKWPGK-UHFFFAOYSA-M 0.000 description 1
- IWCVDCOJSPWGRW-UHFFFAOYSA-M magnesium;benzene;chloride Chemical class [Mg+2].[Cl-].C1=CC=[C-]C=C1 IWCVDCOJSPWGRW-UHFFFAOYSA-M 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 125000000250 methylamino group Chemical group [H]N(*)C([H])([H])[H] 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- JVJQPDTXIALXOG-UHFFFAOYSA-N nitryl fluoride Chemical compound [O-][N+](F)=O JVJQPDTXIALXOG-UHFFFAOYSA-N 0.000 description 1
- 150000007530 organic bases Chemical class 0.000 description 1
- 125000002524 organometallic group Chemical group 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- XYFCBTPGUUZFHI-UHFFFAOYSA-O phosphonium Chemical group [PH4+] XYFCBTPGUUZFHI-UHFFFAOYSA-O 0.000 description 1
- 229920000570 polyether Chemical group 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000000859 sublimation Methods 0.000 description 1
- 230000008022 sublimation Effects 0.000 description 1
- 150000008054 sulfonate salts Chemical group 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- LMBFAGIMSUYTBN-MPZNNTNKSA-N teixobactin Chemical compound C([C@H](C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CO)C(=O)N[C@H](CCC(N)=O)C(=O)N[C@H]([C@@H](C)CC)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CO)C(=O)N[C@H]1C(N[C@@H](C)C(=O)N[C@@H](C[C@@H]2NC(=N)NC2)C(=O)N[C@H](C(=O)O[C@H]1C)[C@@H](C)CC)=O)NC)C1=CC=CC=C1 LMBFAGIMSUYTBN-MPZNNTNKSA-N 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- WHRNULOCNSKMGB-UHFFFAOYSA-N tetrahydrofuran thf Chemical compound C1CCOC1.C1CCOC1 WHRNULOCNSKMGB-UHFFFAOYSA-N 0.000 description 1
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 description 1
- COIOYMYWGDAQPM-UHFFFAOYSA-N tris(2-methylphenyl)phosphane Chemical compound CC1=CC=CC=C1P(C=1C(=CC=CC=1)C)C1=CC=CC=C1C COIOYMYWGDAQPM-UHFFFAOYSA-N 0.000 description 1
- 230000035899 viability Effects 0.000 description 1
- 239000003021 water soluble solvent Substances 0.000 description 1
- 238000004857 zone melting Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C201/00—Preparation of esters of nitric or nitrous acid or of compounds containing nitro or nitroso groups bound to a carbon skeleton
- C07C201/06—Preparation of nitro compounds
- C07C201/12—Preparation of nitro compounds by reactions not involving the formation of nitro groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C205/00—Compounds containing nitro groups bound to a carbon skeleton
- C07C205/07—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by halogen atoms
- C07C205/11—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by halogen atoms having nitro groups bound to carbon atoms of six-membered aromatic rings
- C07C205/12—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by halogen atoms having nitro groups bound to carbon atoms of six-membered aromatic rings the six-membered aromatic ring or a condensed ring system containing that ring being substituted by halogen atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
- C07C209/68—Preparation of compounds containing amino groups bound to a carbon skeleton from amines, by reactions not involving amino groups, e.g. reduction of unsaturated amines, aromatisation, or substitution of the carbon skeleton
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C211/00—Compounds containing amino groups bound to a carbon skeleton
- C07C211/43—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton
- C07C211/44—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to only one six-membered aromatic ring
- C07C211/52—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to only one six-membered aromatic ring the carbon skeleton being further substituted by halogen atoms or by nitro or nitroso groups
Abstract
A process for preparing substituted biphenyls of the formula (I), in which the substituents are defined as follows: X is fluorine or chlorine; R1 is nitro, amino or NHR3; R2 is cyano, nitro, halogen, C1-C6-alkyl, C1-C6-alkenyl, C1-C6-alkynyl, C1-C6-alkoxy, C1-C6-haloalkyl, C1-C6-alkylcarbonyl or phenyl; R3 is C1-C4-alkyl, C1-C4-alkenyl or C1-C4-alkynyl; n is 1, 2 or 3, where in case that n is 2 or 3, the R2 radicals may also be different, which comprises reacting the compound of the formula (II), in which Hal is halogen and X and R1 are as defined above, in the presence of a base and of a palladium catalyst selected from the group of: a) palladium-triarylphosphine or -trialkylphosphine complex with palladium in the zero oxidation state, b) salt of palladium in the presence of triarylphospine or trialkylphosphine as a complex ligand or c) metallic palladium, optionally applied to support, in the presence of triarylphosphine or trialkylphosphine, in a solvent, with a diphenylborinic acid (III), in which R2 and n are as defined above, where the triarylphosphines or trialkylphosphines used may be substituted.
Description
Process for preparing substituted biphenyls Description The present invention relates to a process for preparing substituted biphenyls of the formula I
X -\
\ / (I), R1 (R2)n n in which the substituents are defined as follows:
X is fluorine or chlorine;
R' is nitro, amino or NHR3;
R2 is cyano, nitro, halogen, C,-C6-alkyl, C,-C6-alkenyl, C,-C6-alkynyl, C,-C6-alkoxy, C,-C6-haloalkyl, (C,-C6-alkyl)carbonyl or phenyl;
R3 is C,-Ca-alkyl, C,-Ca-alkenyl or C,-Ca-alkynyl;
n is 1, 2 or 3, where in case that n is 2 or 3, the R2 radicals may also be different, which comprises reacting a compound of formula II
X
Hal (II), in which Hal is halogen and X and R' are as defined above, in the presence of a base and of a palladium catalyst selected from the group of:
a) palladium-triarylphosphine or -trialkylphosphine complex with palladium in the zero oxidation state, b) salt of palladium in the presence of triarylphospine or trialkylphosphine as a complex ligand or c) metallic palladium, optionally applied to support, in the presence of triarylphosphine or trialkylphosphine, in a solvent, with a diphenylborinic acid (III) OH
X -\
\ / (I), R1 (R2)n n in which the substituents are defined as follows:
X is fluorine or chlorine;
R' is nitro, amino or NHR3;
R2 is cyano, nitro, halogen, C,-C6-alkyl, C,-C6-alkenyl, C,-C6-alkynyl, C,-C6-alkoxy, C,-C6-haloalkyl, (C,-C6-alkyl)carbonyl or phenyl;
R3 is C,-Ca-alkyl, C,-Ca-alkenyl or C,-Ca-alkynyl;
n is 1, 2 or 3, where in case that n is 2 or 3, the R2 radicals may also be different, which comprises reacting a compound of formula II
X
Hal (II), in which Hal is halogen and X and R' are as defined above, in the presence of a base and of a palladium catalyst selected from the group of:
a) palladium-triarylphosphine or -trialkylphosphine complex with palladium in the zero oxidation state, b) salt of palladium in the presence of triarylphospine or trialkylphosphine as a complex ligand or c) metallic palladium, optionally applied to support, in the presence of triarylphosphine or trialkylphosphine, in a solvent, with a diphenylborinic acid (III) OH
2 e (R n B (R )n in which R' and n are as defined above, where the triarylphosphines or trialkylphosphines used may be substituted.
Tetrahedron Lett. 32, page 2277 (1991) states that the coupling reaction between phenylboronic acid and chlorobenzene with use of the [1,4-bis(diphenylphosphine)-butane]palladium(II) dichloride catalyst proceeds with a yield of only 28%.
EP-A 0 888 261 discloses a process for preparing nitrobiphenyls by reacting chloronitrobenzenes with a phenylboronic acid in the presence of a palladium catalyst and of a base. In this process, a very high catalyst concentration is necessary.
It was therefore an object of the present invention to provide an economically viable process which can be implemented on the industrial scale for regioselectively preparing substituted biphenyls, which works with a reduced palladium catalyst concentration.
Accordingly, the process defined at the outset has been found.
The diphenylborinic acid (III) is obtained by reaction of optionally substituted phenylmagnesium chloride V with trialkyl borate, preferably trimethyl borate, in tetrahydrofuran as a solvent according to scheme 1 which follows.
Scheme 1:
CI MgCI OH
1. B(OR4W B
Mg tetrahydrofuran tetrahydrofuran 2. acid (R2)n (R2)n (R2)n (R2)n (IV) (V) (III) R4 is C,-Ca-alkyl, preferably methyl.
Essential for a high yield of diphenylborinic acid (III) is the use of only 0.7 eq. of trialkyl borate based on the substituted chlorobenzene (IV) used. Use of 1.1 eq. of trialkyl borate gives rise to phenylboronic acid as described in EP-A 0 888 261.
This reduction in the trialkyl borate use has several surprising advantages in relation to the preparation of nitrobiphenyls (I). The space-time yield is increased. The feedstock costs are lowered as a result of reduction in the amount of expensive trimethyl borate.
Unlike the phenylboronic acids used in EP-A 0 888 261, the diphenylborinic acids (III) are soluble in tetrahydrofuran, which leads to an improvement in heat removal during the reaction, which is accompanied by lower consumption of the cooling capacity. This leads in turn to higher process safety.
Tetrahedron Lett. 32, page 2277 (1991) states that the coupling reaction between phenylboronic acid and chlorobenzene with use of the [1,4-bis(diphenylphosphine)-butane]palladium(II) dichloride catalyst proceeds with a yield of only 28%.
EP-A 0 888 261 discloses a process for preparing nitrobiphenyls by reacting chloronitrobenzenes with a phenylboronic acid in the presence of a palladium catalyst and of a base. In this process, a very high catalyst concentration is necessary.
It was therefore an object of the present invention to provide an economically viable process which can be implemented on the industrial scale for regioselectively preparing substituted biphenyls, which works with a reduced palladium catalyst concentration.
Accordingly, the process defined at the outset has been found.
The diphenylborinic acid (III) is obtained by reaction of optionally substituted phenylmagnesium chloride V with trialkyl borate, preferably trimethyl borate, in tetrahydrofuran as a solvent according to scheme 1 which follows.
Scheme 1:
CI MgCI OH
1. B(OR4W B
Mg tetrahydrofuran tetrahydrofuran 2. acid (R2)n (R2)n (R2)n (R2)n (IV) (V) (III) R4 is C,-Ca-alkyl, preferably methyl.
Essential for a high yield of diphenylborinic acid (III) is the use of only 0.7 eq. of trialkyl borate based on the substituted chlorobenzene (IV) used. Use of 1.1 eq. of trialkyl borate gives rise to phenylboronic acid as described in EP-A 0 888 261.
This reduction in the trialkyl borate use has several surprising advantages in relation to the preparation of nitrobiphenyls (I). The space-time yield is increased. The feedstock costs are lowered as a result of reduction in the amount of expensive trimethyl borate.
Unlike the phenylboronic acids used in EP-A 0 888 261, the diphenylborinic acids (III) are soluble in tetrahydrofuran, which leads to an improvement in heat removal during the reaction, which is accompanied by lower consumption of the cooling capacity. This leads in turn to higher process safety.
The reaction temperature in this process stage is from 10 to 30 C, preferably from 15 to 25 C.
The substituted biphenyls prepared by the present process have the following preferred substituents, in each case both individually and in combination:
R' nitro, amino, methylamino, propylamino, butylamino, allylamino or propargyl-amino, more preferably nitro, amino or methylamino, most preferably nitro or amino;
R2 cyano, nitro, fluorine, chlorine, bromine, methyl, ethyl, propyl, butyl, allyl, propargyl, methoxy, ethoxy, trifluoromethyl or phenyl, more preferably fluorine, chlorine, methyl or methoxy, most preferably fluorine or chlorine;
R3 methyl, ethyl, propyl, butyl, allyl or propargyl, more preferably methyl, ethyl or allyl, most preferably methyl;
n 1 or 2, preferably 2.
The subsequent homogeneously catalyzed Suzuki biaryl cross-coupling is carried out according to scheme 2.
Scheme 2:
OH 1. aq NaOH
2. Pd precursor / ligand ~(I) X
CI
(R2)n (R2)n (III) (II) where Hal = Cl Preference is given to starting from diphenylborinic acids of the formula (III) in which R2 and n are as defined above.
Further preferred starting materials are diphenylborinic acids (III) in which n is 1 or 2, in particular 2. Particularly preferred are diphenylborinic acids (III) which are substituted in the 3- and 4-position.
The substituted biphenyls prepared by the present process have the following preferred substituents, in each case both individually and in combination:
R' nitro, amino, methylamino, propylamino, butylamino, allylamino or propargyl-amino, more preferably nitro, amino or methylamino, most preferably nitro or amino;
R2 cyano, nitro, fluorine, chlorine, bromine, methyl, ethyl, propyl, butyl, allyl, propargyl, methoxy, ethoxy, trifluoromethyl or phenyl, more preferably fluorine, chlorine, methyl or methoxy, most preferably fluorine or chlorine;
R3 methyl, ethyl, propyl, butyl, allyl or propargyl, more preferably methyl, ethyl or allyl, most preferably methyl;
n 1 or 2, preferably 2.
The subsequent homogeneously catalyzed Suzuki biaryl cross-coupling is carried out according to scheme 2.
Scheme 2:
OH 1. aq NaOH
2. Pd precursor / ligand ~(I) X
CI
(R2)n (R2)n (III) (II) where Hal = Cl Preference is given to starting from diphenylborinic acids of the formula (III) in which R2 and n are as defined above.
Further preferred starting materials are diphenylborinic acids (III) in which n is 1 or 2, in particular 2. Particularly preferred are diphenylborinic acids (III) which are substituted in the 3- and 4-position.
Very particular preference is given to di(2,3-difluorophenyl)borinic acid, di(3,4-di-fluorophenyl)borinic acid, di(2,3-dichlorophenyl)borinic acid and in particular di(3,4-dichlorophenyl)borinic acid as the starting compound (III).
Preference is given to starting from the following compounds (II):
2-bromo-4-fluoroaniline, 2-chloro-4-fluoroaniline and in particular 2-chloro-4-fluoro-1-nitrobenzene or 2-bromo-4-fluoro-1 -nitrobenzene.
The compound (II) is used, based on the diphenylborinic acids (III) (diphenylborinic acid equivalents), normally in an equimolar amount, preferably with an up to 20 percent excess, in particular with an up to 50 percent excess.
The bases used may be organic bases, for example tertiary amines. Preference is given to using, for example, triethylamine or dimethylcyclohexylamine.
The bases used are preferably alkali metal hydroxides, alkaline earth metal hydroxides, alkali metal carbonates, alkaline earth metal carbonates, alkali metal hydrogen-carbonates, alkali metal acetates, alkaline earth metal acetates, alkali metal alkoxides and alkaline earth metal alkoxides, in a mixture and in particular individually.
Particularly preferred bases are alkali metal hydroxides, alkaline earth metal hydroxides, alkali metal carbonates, alkaline earth metal carbonates and alkali metal hydrogencarbonates.
Especially preferred bases are alkali metal hydroxides, e.g. sodium hydroxide and potassium hydroxide, and also alkali metal carbonates and alkali metal hydrogencarbonates, e.g. lithium carbonate, sodium carbonate and potassium carbonate.
The base is used in the process according to the invention preferably with a fraction of from 100 to 500 mol%, more preferably from 150 to 400 mol%, based on the amount of diphenylborinic acid (III).
Suitable palladium catalysts are palladium-ligand complexes with palladium in the zero oxidation state, salts of palladium in the presence of complex ligands, or metallic palladium optionally applied to support, preferably in the presence of complex ligands.
Suitable complex ligands are uncharged ligands such as triarylphosphines and trialkylphosphines, which may optionally be substituted in the aryl rings, such as triphenylphosphine (TPP), di-l-adamantyl-n-butylphosphine, tri-tert-butylphosphine (TtBP) or 2-(dicyclohexylphosphino)biphenyl.
Furthermore, the literature has also described further particularly reactive complex ligands from other structural classes, including 1,3-bis(2,6-diisopropylphenyl)-4,5-H2-imidazolium chloride (cf., for example, G. A. Grasa et al. Organometallics 2002, 21, 2866) and tris(2,4-di-tert-butylphenyl) phosphite (cf. A. Zapf et al., Chem.
Eur. J. 2000, 5 6, 1830).
The reactivity of the complex ligands can be enhanced by adding a quaternary ammonium salt such as tetra-n-butylammonium bromide (TBAB) (cf., for example, D. Zim et al., Tetrahedron Lett. 2000, 41, 8199).
If required, the water solubility of the palladium complexes can be improved by various substituents such as sulfonic acid or sulfonate salt groups, carboxylic acid or carboxylate salt groups, phosphonic acid, phosphonium or phosphonate salt groups, peralkylammonium, hydroxyl and polyether groups.
Among the palladium-ligand complexes with palladium in the 0 oxidation state, preference is given to using tetrakis(triphenylphosphine)palladium and additionally tetrakis[tri(o-tolyl)phosphine]palladium.
In the salts of palladium which are used in the presence of complex ligands, the palladium is normally present in the two positive oxidation state. Preference is given to using palladium chloride, palladium acetate or bisacetonitrilepalladium chloride.
Particular preference is given to using palladium chloride.
In general, from 6 to 60, preferably from 15 to 25, equivalents of the aforementioned complex ligands, in particular triphenylphosphine and tri-tert-butylphosphine, are combined with one equivalent of the palladium salt.
EP-A 0 888 261 describes the use of from 2 to 6 equivalents of triphenylphosphine per equivalent of the palladium catalyst. The use of high ligand excesses is generally viewed in the literature as disadvantageous, since this is expected to result in inactivation of the catalytically active complex (cf., for example, J. Hassan et al., Chem.
Rev. 2002, 102, 1359).
It was thus surprising that this high triphenylphosphine use in combination with the low catalyst use led to an increase in the overall yield of the process of the present invention and accordingly to an improvement in the economic viability.
Metallic palladium is used preferably in pulverized form or on a support material, for example in the form of palladium on activated carbon, palladium on alumina, palladium on barium carbonate, palladium on barium sulfate, palladium on calcium carbonate, palladium aluminosilicates such as montmorillonite, palladium on Si02 and palladium on calcium carbonate, in each case with a palladium content of from 0.5 to 12%
by weight. In addition to palladium and the support material, these catalyst may comprise further dopants, for example lead.
When metallic palladium optionally applied to support is used, particular preference is given to also using the aforementioned complex ligands, in particular to the use of palladium on activated carbon in the presence of triphenylphosphine as a complex ligand, where the phenyl groups in the triphenylphosphine are preferably substituted by a total of from one to three sulfonate groups.
In the process according to the invention, the palladium catalyst is used with a low fraction of from 0.001 to 1.0 mol%, preferably from 0.005 to 0.5 mol% or from 0.01 to 0.5 mol% and in particular from 0.005 to 0.05 mol%, based on the amount of compound (II).
The low use of a palladium salt in combination with a high use of a complex ligand constitutes a significant cost advantage of this process over the prior art processes.
The process according to the invention may be carried out in a biphasic system composed of aqueous phase and solid phase, i.e. the catalyst. In that case, the aqueous phase may also comprise a water-soluble organic solvent in addition to water.
Organic solvents suitable for the process according to the invention are ethers such as dimethoxyethane, diethylene glycol dimethyl ether, tetrahydrofuran, dioxane and tert.-butyl methyl ether, hydrocarbons such as n-hexane, n-heptane, cyclohexane, benzene, toluene and xylene, alcohols such as methanol, ethanol, 1-propanol, 2-propanol, ethylene glycol, 1-butanol, 2-butanol and tert.-butanol, ketones such as acetone, ethyl methyl ketone and isobutyl methyl ketone, amides such as dimethylformamide, dimethylacetamide and N-methylpyrrolidone, in each case individually or in a mixture.
Preferred solvents are ethers such as dimethoxyethane, tetrahydrofuran and dioxane, hydrocarbons such as cyclohexane, toluene and xylene, alcohols such as ethanol, 1-propanol, 2-propanol, 1-butanol and tert.-butanol, in each case individually or in a mixture.
In a particularly preferred variant of the process according to the invention, water, one or more water-insoluble and one or more water-soluble solvents are used, for example mixtures of water and dioxane, or water and tetrahydrofuran, or water, dioxane and ethanol, or water, tetrahydrofuran and methanol, or water, toluene and tetrahydrofuran, preferably water and tetrahydrofuran, or water, tetrahydrofuran and methanol.
Preference is given to starting from the following compounds (II):
2-bromo-4-fluoroaniline, 2-chloro-4-fluoroaniline and in particular 2-chloro-4-fluoro-1-nitrobenzene or 2-bromo-4-fluoro-1 -nitrobenzene.
The compound (II) is used, based on the diphenylborinic acids (III) (diphenylborinic acid equivalents), normally in an equimolar amount, preferably with an up to 20 percent excess, in particular with an up to 50 percent excess.
The bases used may be organic bases, for example tertiary amines. Preference is given to using, for example, triethylamine or dimethylcyclohexylamine.
The bases used are preferably alkali metal hydroxides, alkaline earth metal hydroxides, alkali metal carbonates, alkaline earth metal carbonates, alkali metal hydrogen-carbonates, alkali metal acetates, alkaline earth metal acetates, alkali metal alkoxides and alkaline earth metal alkoxides, in a mixture and in particular individually.
Particularly preferred bases are alkali metal hydroxides, alkaline earth metal hydroxides, alkali metal carbonates, alkaline earth metal carbonates and alkali metal hydrogencarbonates.
Especially preferred bases are alkali metal hydroxides, e.g. sodium hydroxide and potassium hydroxide, and also alkali metal carbonates and alkali metal hydrogencarbonates, e.g. lithium carbonate, sodium carbonate and potassium carbonate.
The base is used in the process according to the invention preferably with a fraction of from 100 to 500 mol%, more preferably from 150 to 400 mol%, based on the amount of diphenylborinic acid (III).
Suitable palladium catalysts are palladium-ligand complexes with palladium in the zero oxidation state, salts of palladium in the presence of complex ligands, or metallic palladium optionally applied to support, preferably in the presence of complex ligands.
Suitable complex ligands are uncharged ligands such as triarylphosphines and trialkylphosphines, which may optionally be substituted in the aryl rings, such as triphenylphosphine (TPP), di-l-adamantyl-n-butylphosphine, tri-tert-butylphosphine (TtBP) or 2-(dicyclohexylphosphino)biphenyl.
Furthermore, the literature has also described further particularly reactive complex ligands from other structural classes, including 1,3-bis(2,6-diisopropylphenyl)-4,5-H2-imidazolium chloride (cf., for example, G. A. Grasa et al. Organometallics 2002, 21, 2866) and tris(2,4-di-tert-butylphenyl) phosphite (cf. A. Zapf et al., Chem.
Eur. J. 2000, 5 6, 1830).
The reactivity of the complex ligands can be enhanced by adding a quaternary ammonium salt such as tetra-n-butylammonium bromide (TBAB) (cf., for example, D. Zim et al., Tetrahedron Lett. 2000, 41, 8199).
If required, the water solubility of the palladium complexes can be improved by various substituents such as sulfonic acid or sulfonate salt groups, carboxylic acid or carboxylate salt groups, phosphonic acid, phosphonium or phosphonate salt groups, peralkylammonium, hydroxyl and polyether groups.
Among the palladium-ligand complexes with palladium in the 0 oxidation state, preference is given to using tetrakis(triphenylphosphine)palladium and additionally tetrakis[tri(o-tolyl)phosphine]palladium.
In the salts of palladium which are used in the presence of complex ligands, the palladium is normally present in the two positive oxidation state. Preference is given to using palladium chloride, palladium acetate or bisacetonitrilepalladium chloride.
Particular preference is given to using palladium chloride.
In general, from 6 to 60, preferably from 15 to 25, equivalents of the aforementioned complex ligands, in particular triphenylphosphine and tri-tert-butylphosphine, are combined with one equivalent of the palladium salt.
EP-A 0 888 261 describes the use of from 2 to 6 equivalents of triphenylphosphine per equivalent of the palladium catalyst. The use of high ligand excesses is generally viewed in the literature as disadvantageous, since this is expected to result in inactivation of the catalytically active complex (cf., for example, J. Hassan et al., Chem.
Rev. 2002, 102, 1359).
It was thus surprising that this high triphenylphosphine use in combination with the low catalyst use led to an increase in the overall yield of the process of the present invention and accordingly to an improvement in the economic viability.
Metallic palladium is used preferably in pulverized form or on a support material, for example in the form of palladium on activated carbon, palladium on alumina, palladium on barium carbonate, palladium on barium sulfate, palladium on calcium carbonate, palladium aluminosilicates such as montmorillonite, palladium on Si02 and palladium on calcium carbonate, in each case with a palladium content of from 0.5 to 12%
by weight. In addition to palladium and the support material, these catalyst may comprise further dopants, for example lead.
When metallic palladium optionally applied to support is used, particular preference is given to also using the aforementioned complex ligands, in particular to the use of palladium on activated carbon in the presence of triphenylphosphine as a complex ligand, where the phenyl groups in the triphenylphosphine are preferably substituted by a total of from one to three sulfonate groups.
In the process according to the invention, the palladium catalyst is used with a low fraction of from 0.001 to 1.0 mol%, preferably from 0.005 to 0.5 mol% or from 0.01 to 0.5 mol% and in particular from 0.005 to 0.05 mol%, based on the amount of compound (II).
The low use of a palladium salt in combination with a high use of a complex ligand constitutes a significant cost advantage of this process over the prior art processes.
The process according to the invention may be carried out in a biphasic system composed of aqueous phase and solid phase, i.e. the catalyst. In that case, the aqueous phase may also comprise a water-soluble organic solvent in addition to water.
Organic solvents suitable for the process according to the invention are ethers such as dimethoxyethane, diethylene glycol dimethyl ether, tetrahydrofuran, dioxane and tert.-butyl methyl ether, hydrocarbons such as n-hexane, n-heptane, cyclohexane, benzene, toluene and xylene, alcohols such as methanol, ethanol, 1-propanol, 2-propanol, ethylene glycol, 1-butanol, 2-butanol and tert.-butanol, ketones such as acetone, ethyl methyl ketone and isobutyl methyl ketone, amides such as dimethylformamide, dimethylacetamide and N-methylpyrrolidone, in each case individually or in a mixture.
Preferred solvents are ethers such as dimethoxyethane, tetrahydrofuran and dioxane, hydrocarbons such as cyclohexane, toluene and xylene, alcohols such as ethanol, 1-propanol, 2-propanol, 1-butanol and tert.-butanol, in each case individually or in a mixture.
In a particularly preferred variant of the process according to the invention, water, one or more water-insoluble and one or more water-soluble solvents are used, for example mixtures of water and dioxane, or water and tetrahydrofuran, or water, dioxane and ethanol, or water, tetrahydrofuran and methanol, or water, toluene and tetrahydrofuran, preferably water and tetrahydrofuran, or water, tetrahydrofuran and methanol.
The total amount of solvent is normally from 3000 to 500 g and preferably from 2000 to 700 g, per mole of the compound (II).
Appropriately, the process is carried out by adding the compound (II), the diphenyl-borinic acids (III), the base and the catalytic amount of the palladium catalyst to a mixture of water and one or more inert organic solvents, and stirring at a temperature of from 50 C to 120 C, preferably from 70 C to 110 C, more preferably from 90 C to 100 C, for a period of from 1 to 50 hours, preferably from 2 to 24 hours.
Depending on the solvent and temperature used, a pressure of from 1 bar to 6 bar, preferably from 1 bar to 4 bar, is established.
Preference is given to carrying out the reaction in water and tetrahydrofuran.
The reaction may be carried out in customary apparatus suitable for such processes.
On completion of reaction, palladium catalyst obtained as a solid is removed, for example by filtration, and the crude product is freed from the solvent or the solvents.
In the case of products which are not fully water-soluble, water-soluble palladium catalysts or complex ligands are removed fully from the crude product in the separation of the water phase.
Subsequently, further purification may be effected by methods which are known to those skilled in the art and are appropriate to the particular product, for example by recrystallization, distillation, sublimation, zone melting, melt crystallization or chromatography.
By the process according to the invention, it is possible to prepare, for example:
3',4'-dichloro-5-fluoro-biphenyl-2-ylamine, 2',3'-dichloro-5-fluoro-biphenyl-2-ylamine, 3',4'-dichloro-3-fluoro-biphenyl-2-ylamine, 2',3'-dichloro-3-fluoro-biphenyl-2-ylamine, 3',4'-dichloro-4-fluoro-biphenyl-2-ylamine, 2',3'-dichloro-4-fluoro-biphenyl-2-ylamine, 3',4'-dichloro-6-fluoro-biphenyl-2-ylamine, 2',3'-dichloro-6-fluoro-biphenyl-2-ylamine, 3',4'-d ifl uoro-5-fluoro-biphenyl-2-ylamine, 2',3'-d ifl uoro-5-fluoro-biphenyl-2-ylamine, 3',4'-difluoro-3-fluoro-biphenyl-2-ylamine, 2',3'-d ifl uoro-3-fluoro-biphenyl-2-ylamine, 3',4'-difluoro-4-fluoro-biphenyl-2-ylamine, 2',3'-difluoro-4-fluoro-biphenyl-2-ylamine, 3',4'-d ifl uoro-6-fluoro-biphenyl-2-ylamine, 2',3'-dichloro-6-fluoro-biphenyl-2-ylamine, 3',4'-dichloro-5-chloro-biphenyl-2-ylamine, 2',3'-dichloro-5- chloro-biphenyl-2-ylamine, 3',4'-dichloro-3-chloro-biphenyl-2-ylamine, 2',3'-dichloro-3-chloro-biphenyl-2-ylamine, 3',4'-dichloro-4-chloro-biphenyl-2-ylamine, 2',3'-dichloro-4-chloro-biphenyl-2-ylamine, 3',4'-dichloro-6-chloro-biphenyl-2-ylamine, 2',3'-dichloro-6-chloro-biphenyl-2-ylamine, 3',4'-difluoro-5-chloro-biphenyl-2-ylamine, 2',3'-difluoro-5-chloro-biphenyl-2-ylamine, 3',4'-difluoro-3-chloro-biphenyl-2-ylamine, 2',3'-difluoro-3-chloro-biphenyl-2-ylamine, 3',4'-difluoro-4-chloro-biphenyl-2-ylamine, 2',3'-difluoro-4-chloro-biphenyl-2-ylamine, 3',4'-difluoro-6-chloro-biphenyl-2-ylamine, 2',3'-dichloro-6-chloro-biphenyl-2-ylamine, 3',4'-dichloro-5-fluoro-2-nitrobiphenyl, 2',3'-dichloro-5-fluoro-2-nitrobiphenyl, 3',4'-dichloro-3-fluoro-2-nitrobiphenyl, 2',3'-dichloro-3-fluoro-2-nitrobiphenyl, 3',4'-dichloro-4-fluoro-2-nitrobiphenyl, 2',3'-dichloro-4-fluoro-2-nitrobiphenyl, 3',4'-dichloro-6-fluoro-2-nitrobiphenyl, 2',3'-dichloro-6-fluoro-2-nitrobiphenyl, 3',4'-difluoro-5-fluoro-2-nitrobiphenyl, 2',3'-difluoro-5-fluoro-2-nitrobiphenyl, 3',4'-difluoro-3-fluoro-2-nitrobiphenyl, 2',3'-difluoro-3-fluoro-2-nitrobiphenyl, 3',4'-difluoro-4-fluoro-2-nitrobiphenyl, 2',3'-difluoro-4-fluoro-2-nitrobiphenyl, 3',4'-difluoro-6-fluoro-2-nitrobiphenyl, 2',3'-dichloro-6-fluoro-2-nitrobiphenyl, 3',4'-dichloro-5-chloro-2-nitrobiphenyl, 2',3'-dichloro-5- chloro-2-nitrobiphenyl, 3',4'-dichloro-3-chloro-2-nitrobiphenyl, 2',3'-dichloro-3-chloro-2-nitrobiphenyl, 3',4'-dichloro-4-chloro-2-nitrobiphenyl, 2',3'-dichloro-4-chloro-2-nitrobiphenyl, 3',4'-dichloro-6-chloro-2-nitrobiphenyl, 2',3'-dichloro-6-chloro-2-nitrobiphenyl, 3',4'-d ifl uoro-5-chloro-2-n itrobi phenyl, 2',3'-d ifl uoro-5-chloro-2-nitrobiphenyl, 3',4'-d ifl uoro-3-chloro-2-n itrobi phenyl, 2',3'-difluoro-3-chloro-2-nitrobiphenyl, 3',4'-difluoro-4-chloro-2-nitrobiphenyl, 2',3'-difluoro-4-chloro-2-nitrobiphenyl, 3',4'-d ifl uoro-6-chloro-2-n itrobi phenyl, 2',3'-dichloro-6-chloro-2-nitrobiphenyl.
The process according to the invention affords the compounds I in very high up to quantitative yields at very good purity.
The substituted biphenyls obtainable by the process according to the invention are suitable as precursors for fungicidal crop protection active ingredients (cf.
WO
03/070705).
Synthesis of 3',4'-dichloro-5-fluoro-2-nitro-biphenyl Example 1: Di-(3,4-dichlorophenyl)borinic acid A solution of 12.81 g of trimethyl borate (123 mM) and 30 mL of tetrahydrofuran is heated to reflux. To this are metered 245 g of a 18% by weight solution of 3,4-dichlorophenylmagnesium bromide (177 mM) in tetrahydrofuran within 1 hours.
After full addition, the reaction solution is stirred at reflux for another hour.
The reaction solution is subsequently treated with 110 mL of 10% aqueous hydrochloric acid and stirred at 40 C for 30 minutes. After phase separation, a solution of di(3,4-dichlorophenyl)borinic acid in tetrahydrofuran is obtained. 32,1 g of di(4-chlorophenyl)borinic acid is isolated by crystallization from 200 mL of hexane (yield 57%). MS: m/z = 320 [m+H]+,'H-NMR (DMSO, 500 MHz): b[ppm] = 7.51 (s, 1 H), 7.38 (d, 1 H, 7 Hz), 7.27 (d, 1 H, 7 Hz).
Example 2: Reaction of di(3,4-dichlorophenyl)borinic acid and 2-bromo-4-fluoro-aniline A reaction flask is initially charged with 0.55 g of sodium hydroxide (13.7 mM) and 50 mL of water at 15-20 C.
To this are metered 2,5 g of di(3,4-dichlorophenyl)borinic acid (7.8 mM) and 0.199 g of triphenylphosphine (0.76 mM) in 50 mL of dioxane. After full addition, the reaction solution is stirred at 18-22 C for 40 minutes. After deoxygenation, 27 mg of palladium(II) chloride (0.15 mM) and 1,4 g of 2-bromo-4-fluoro-aniline (7.4 mM) are 5 added to the reaction solution. The reaction solution is heated to 85 C for 6 hours.
The reaction mixture is cooled down, acidified with 2 M hydrochloric acid and the dioxane evaporated. The residue is extracted with dichloromethane and after evaporation of solvent the 3',4'-dichloro-5-fluoro-biphenyl-2-ylamine is isolated by column chromatography (0.63 g, yield 33%).
Appropriately, the process is carried out by adding the compound (II), the diphenyl-borinic acids (III), the base and the catalytic amount of the palladium catalyst to a mixture of water and one or more inert organic solvents, and stirring at a temperature of from 50 C to 120 C, preferably from 70 C to 110 C, more preferably from 90 C to 100 C, for a period of from 1 to 50 hours, preferably from 2 to 24 hours.
Depending on the solvent and temperature used, a pressure of from 1 bar to 6 bar, preferably from 1 bar to 4 bar, is established.
Preference is given to carrying out the reaction in water and tetrahydrofuran.
The reaction may be carried out in customary apparatus suitable for such processes.
On completion of reaction, palladium catalyst obtained as a solid is removed, for example by filtration, and the crude product is freed from the solvent or the solvents.
In the case of products which are not fully water-soluble, water-soluble palladium catalysts or complex ligands are removed fully from the crude product in the separation of the water phase.
Subsequently, further purification may be effected by methods which are known to those skilled in the art and are appropriate to the particular product, for example by recrystallization, distillation, sublimation, zone melting, melt crystallization or chromatography.
By the process according to the invention, it is possible to prepare, for example:
3',4'-dichloro-5-fluoro-biphenyl-2-ylamine, 2',3'-dichloro-5-fluoro-biphenyl-2-ylamine, 3',4'-dichloro-3-fluoro-biphenyl-2-ylamine, 2',3'-dichloro-3-fluoro-biphenyl-2-ylamine, 3',4'-dichloro-4-fluoro-biphenyl-2-ylamine, 2',3'-dichloro-4-fluoro-biphenyl-2-ylamine, 3',4'-dichloro-6-fluoro-biphenyl-2-ylamine, 2',3'-dichloro-6-fluoro-biphenyl-2-ylamine, 3',4'-d ifl uoro-5-fluoro-biphenyl-2-ylamine, 2',3'-d ifl uoro-5-fluoro-biphenyl-2-ylamine, 3',4'-difluoro-3-fluoro-biphenyl-2-ylamine, 2',3'-d ifl uoro-3-fluoro-biphenyl-2-ylamine, 3',4'-difluoro-4-fluoro-biphenyl-2-ylamine, 2',3'-difluoro-4-fluoro-biphenyl-2-ylamine, 3',4'-d ifl uoro-6-fluoro-biphenyl-2-ylamine, 2',3'-dichloro-6-fluoro-biphenyl-2-ylamine, 3',4'-dichloro-5-chloro-biphenyl-2-ylamine, 2',3'-dichloro-5- chloro-biphenyl-2-ylamine, 3',4'-dichloro-3-chloro-biphenyl-2-ylamine, 2',3'-dichloro-3-chloro-biphenyl-2-ylamine, 3',4'-dichloro-4-chloro-biphenyl-2-ylamine, 2',3'-dichloro-4-chloro-biphenyl-2-ylamine, 3',4'-dichloro-6-chloro-biphenyl-2-ylamine, 2',3'-dichloro-6-chloro-biphenyl-2-ylamine, 3',4'-difluoro-5-chloro-biphenyl-2-ylamine, 2',3'-difluoro-5-chloro-biphenyl-2-ylamine, 3',4'-difluoro-3-chloro-biphenyl-2-ylamine, 2',3'-difluoro-3-chloro-biphenyl-2-ylamine, 3',4'-difluoro-4-chloro-biphenyl-2-ylamine, 2',3'-difluoro-4-chloro-biphenyl-2-ylamine, 3',4'-difluoro-6-chloro-biphenyl-2-ylamine, 2',3'-dichloro-6-chloro-biphenyl-2-ylamine, 3',4'-dichloro-5-fluoro-2-nitrobiphenyl, 2',3'-dichloro-5-fluoro-2-nitrobiphenyl, 3',4'-dichloro-3-fluoro-2-nitrobiphenyl, 2',3'-dichloro-3-fluoro-2-nitrobiphenyl, 3',4'-dichloro-4-fluoro-2-nitrobiphenyl, 2',3'-dichloro-4-fluoro-2-nitrobiphenyl, 3',4'-dichloro-6-fluoro-2-nitrobiphenyl, 2',3'-dichloro-6-fluoro-2-nitrobiphenyl, 3',4'-difluoro-5-fluoro-2-nitrobiphenyl, 2',3'-difluoro-5-fluoro-2-nitrobiphenyl, 3',4'-difluoro-3-fluoro-2-nitrobiphenyl, 2',3'-difluoro-3-fluoro-2-nitrobiphenyl, 3',4'-difluoro-4-fluoro-2-nitrobiphenyl, 2',3'-difluoro-4-fluoro-2-nitrobiphenyl, 3',4'-difluoro-6-fluoro-2-nitrobiphenyl, 2',3'-dichloro-6-fluoro-2-nitrobiphenyl, 3',4'-dichloro-5-chloro-2-nitrobiphenyl, 2',3'-dichloro-5- chloro-2-nitrobiphenyl, 3',4'-dichloro-3-chloro-2-nitrobiphenyl, 2',3'-dichloro-3-chloro-2-nitrobiphenyl, 3',4'-dichloro-4-chloro-2-nitrobiphenyl, 2',3'-dichloro-4-chloro-2-nitrobiphenyl, 3',4'-dichloro-6-chloro-2-nitrobiphenyl, 2',3'-dichloro-6-chloro-2-nitrobiphenyl, 3',4'-d ifl uoro-5-chloro-2-n itrobi phenyl, 2',3'-d ifl uoro-5-chloro-2-nitrobiphenyl, 3',4'-d ifl uoro-3-chloro-2-n itrobi phenyl, 2',3'-difluoro-3-chloro-2-nitrobiphenyl, 3',4'-difluoro-4-chloro-2-nitrobiphenyl, 2',3'-difluoro-4-chloro-2-nitrobiphenyl, 3',4'-d ifl uoro-6-chloro-2-n itrobi phenyl, 2',3'-dichloro-6-chloro-2-nitrobiphenyl.
The process according to the invention affords the compounds I in very high up to quantitative yields at very good purity.
The substituted biphenyls obtainable by the process according to the invention are suitable as precursors for fungicidal crop protection active ingredients (cf.
WO
03/070705).
Synthesis of 3',4'-dichloro-5-fluoro-2-nitro-biphenyl Example 1: Di-(3,4-dichlorophenyl)borinic acid A solution of 12.81 g of trimethyl borate (123 mM) and 30 mL of tetrahydrofuran is heated to reflux. To this are metered 245 g of a 18% by weight solution of 3,4-dichlorophenylmagnesium bromide (177 mM) in tetrahydrofuran within 1 hours.
After full addition, the reaction solution is stirred at reflux for another hour.
The reaction solution is subsequently treated with 110 mL of 10% aqueous hydrochloric acid and stirred at 40 C for 30 minutes. After phase separation, a solution of di(3,4-dichlorophenyl)borinic acid in tetrahydrofuran is obtained. 32,1 g of di(4-chlorophenyl)borinic acid is isolated by crystallization from 200 mL of hexane (yield 57%). MS: m/z = 320 [m+H]+,'H-NMR (DMSO, 500 MHz): b[ppm] = 7.51 (s, 1 H), 7.38 (d, 1 H, 7 Hz), 7.27 (d, 1 H, 7 Hz).
Example 2: Reaction of di(3,4-dichlorophenyl)borinic acid and 2-bromo-4-fluoro-aniline A reaction flask is initially charged with 0.55 g of sodium hydroxide (13.7 mM) and 50 mL of water at 15-20 C.
To this are metered 2,5 g of di(3,4-dichlorophenyl)borinic acid (7.8 mM) and 0.199 g of triphenylphosphine (0.76 mM) in 50 mL of dioxane. After full addition, the reaction solution is stirred at 18-22 C for 40 minutes. After deoxygenation, 27 mg of palladium(II) chloride (0.15 mM) and 1,4 g of 2-bromo-4-fluoro-aniline (7.4 mM) are 5 added to the reaction solution. The reaction solution is heated to 85 C for 6 hours.
The reaction mixture is cooled down, acidified with 2 M hydrochloric acid and the dioxane evaporated. The residue is extracted with dichloromethane and after evaporation of solvent the 3',4'-dichloro-5-fluoro-biphenyl-2-ylamine is isolated by column chromatography (0.63 g, yield 33%).
10 HPLC-MS: m/z = 256.0 [m+H]+
Example 3: Reaction of di(3,4-dichlorophenyl)borinic acid and 2-chloro-4-fluoro-l-nitro-benzene A reaction flask is initially charged with 0.55 g of sodium hydroxide (13.7 mM) and 50 mL of water at 15-20 C.
To this are metered 2,5 g of di(3,4-dichlorophenyl)borinic acid (7.8 mM) and 0.199 g of triphenylphosphine (0.76 mM) in 50 mL of dioxane. After full addition, the reaction solution is stirred at 18-22 C for 40 minutes. After deoxygenation, 27 mg of palladium(II) chloride (0.15 mM) and 1,3 g of 2-chloro-4-fluoro-l-nitro-benzene (7.4 mM) are added to the reaction solution. The reaction solution is heated to 85 C for 6 hours.
The reaction mixture is cooled down, acidified with 2 M hydrochloric acid and the dioxane evaporated. The residue is extracted with dichloromethane and after evaporation of solvent the 3',4'-dichloro-5-fluoro-2-nitro-biphenyl is isolated by column chromatography (0.76 g, yield 36%).
GC-MS: m/z = 285.9 [m-H]-
Example 3: Reaction of di(3,4-dichlorophenyl)borinic acid and 2-chloro-4-fluoro-l-nitro-benzene A reaction flask is initially charged with 0.55 g of sodium hydroxide (13.7 mM) and 50 mL of water at 15-20 C.
To this are metered 2,5 g of di(3,4-dichlorophenyl)borinic acid (7.8 mM) and 0.199 g of triphenylphosphine (0.76 mM) in 50 mL of dioxane. After full addition, the reaction solution is stirred at 18-22 C for 40 minutes. After deoxygenation, 27 mg of palladium(II) chloride (0.15 mM) and 1,3 g of 2-chloro-4-fluoro-l-nitro-benzene (7.4 mM) are added to the reaction solution. The reaction solution is heated to 85 C for 6 hours.
The reaction mixture is cooled down, acidified with 2 M hydrochloric acid and the dioxane evaporated. The residue is extracted with dichloromethane and after evaporation of solvent the 3',4'-dichloro-5-fluoro-2-nitro-biphenyl is isolated by column chromatography (0.76 g, yield 36%).
GC-MS: m/z = 285.9 [m-H]-
Claims (15)
1. A process for preparing substituted biphenyls of the formula I
in which the substituents are defined as follows:
X is fluorine or chlorine;
R1 is nitro, amino or NHR3;
R2 is cyano, nitro, halogen, C1-C6-alkyl, C1-C6-alkenyl, C1-C6-alkynyl, C1-C6-alkoxy, C1-C6-haloalkyl, (C1-C6-alkyl)carbonyl or phenyl;
R3 is C1-C4-alkyl, C1-C4-alkenyl or C1-C4-alkynyl, n is 1, 2 or 3, where in case that n is 2 or 3, the R2 radicals may also be different, which comprises reacting the compound of the formula II
in which Hal is halogen and X and R1 are as defined above, in the presence of a base and of a palladium catalyst selected from the group of:
a) palladium-triarylphosphine or -trialkylphosphine complex with palladium in the zero oxidation state, b) salt of palladium in the presence of triarylphospine or trialkylphosphine as a complex ligand or c) metallic palladium, optionally applied to support, in the presence of triarylphosphine or trialkylphosphine, in a solvent, with a diphenylborinic acid (III) in which R2 and n are as defined above, where the triarylphosphines or trialkylphosphines used may be substituted.
in which the substituents are defined as follows:
X is fluorine or chlorine;
R1 is nitro, amino or NHR3;
R2 is cyano, nitro, halogen, C1-C6-alkyl, C1-C6-alkenyl, C1-C6-alkynyl, C1-C6-alkoxy, C1-C6-haloalkyl, (C1-C6-alkyl)carbonyl or phenyl;
R3 is C1-C4-alkyl, C1-C4-alkenyl or C1-C4-alkynyl, n is 1, 2 or 3, where in case that n is 2 or 3, the R2 radicals may also be different, which comprises reacting the compound of the formula II
in which Hal is halogen and X and R1 are as defined above, in the presence of a base and of a palladium catalyst selected from the group of:
a) palladium-triarylphosphine or -trialkylphosphine complex with palladium in the zero oxidation state, b) salt of palladium in the presence of triarylphospine or trialkylphosphine as a complex ligand or c) metallic palladium, optionally applied to support, in the presence of triarylphosphine or trialkylphosphine, in a solvent, with a diphenylborinic acid (III) in which R2 and n are as defined above, where the triarylphosphines or trialkylphosphines used may be substituted.
2. The process according to claim 1, wherein the compound (II) used is 2-nitro-
3-fluoro-chlorobenzene or 2-amino-3-fluoro-bromobenzene.
3. The process according to claim 1 or 2, wherein the starting compound (III) is a diphenylborinic acid which is substituted in the 3- and 4-position.
3. The process according to claim 1 or 2, wherein the starting compound (III) is a diphenylborinic acid which is substituted in the 3- and 4-position.
4. The process according to claims 1 or 2, wherein a diphenylborinic acid (III) is used which bears fluorine or chlorine in the 3- and 4-positions.
5. The process according to claims 1 or 2, wherein the starting compound (III) is di(3,4-dichlorophenyl)borinic acid.
6. The process according to claims 1 to 5, wherein the palladium catalyst a) according to claim 1 used is tetrakis(triphenylphosphine)palladium or tetrakis(tri-tert.-butylphosphine)palladium.
7. The process according to claims 1 to 5, wherein a palladium catalyst b) according to claim 1 is used.
8. The process according to claims 1 to 5, wherein the palladium catalyst c) according to claim 1 used is metallic palladium on activated carbon in the presence of triphenylphosphine whose phenyl groups are substituted by a total of from 1 to 3 sulfonate groups.
9. The process as claimed in claim 7, wherein the salt of the palladium catalyst b) used is palladium chloride, palladium acetate or bisacetonitrilepalladium chloride.
10. The process according to claim 7, wherein a palladium catalyst b) is used for which from 6 to 60 equivalents of triphenylphosphine are used per equivalent of the palladium salt.
11. The process according to claim 1, wherein from 0.001 to 1.0 mol% of the palladium catalyst is used, based on the amount of compound (II).
12. The process according to claim 1, wherein the reaction is carried out at a temperature of from 50 to 120°C.
13 13. The process according to claim 1, wherein the reaction is carried out in a mixture of water and an organic solvent.
14. The process according to claim 13, wherein the organic solvent used is an ether.
15. The process according to claim 1, wherein the reactions are carried out at a pressure of from 1 to 6 bar.
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PCT/EP2007/055283 WO2007138089A1 (en) | 2006-06-01 | 2007-05-31 | Process for preparing substituted biphenyls |
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AR052930A1 (en) * | 2005-03-02 | 2007-04-11 | Basf Ag | PROCEDURE FOR THE PREPARATION OF REPLACED BIFENILES |
DE102007016971A1 (en) * | 2007-04-10 | 2008-10-16 | Saltigo Gmbh | 2-nitro-5-fluoro-3 ', 4'-dichlorobiphenyl and a process for its preparation |
EP2008991A1 (en) | 2007-06-29 | 2008-12-31 | Bayer CropScience AG | Method for manufacturing biaryls |
US7821647B2 (en) * | 2008-02-21 | 2010-10-26 | Corning Incorporated | Apparatus and method for measuring surface topography of an object |
EP2093216A1 (en) * | 2008-02-25 | 2009-08-26 | Bayer CropScience AG | Process for preparing substituted biphenylanilides |
EP2119697A1 (en) * | 2008-05-09 | 2009-11-18 | Bayer CropScience AG | Process for preparing substituted biphenylanilides |
EA023304B1 (en) * | 2008-06-25 | 2016-05-31 | Басф Се | Method for producing substituted biphenyls |
MX2010014132A (en) * | 2008-07-03 | 2011-07-28 | Basf Se | Method for producing aminobiphenylene. |
JP5178470B2 (en) * | 2008-11-19 | 2013-04-10 | 三井化学株式会社 | Method for producing fluorene derivative |
US8492558B2 (en) | 2009-02-19 | 2013-07-23 | Basf Se | Method for producing 2-aminobiphenylene |
CN102348675B (en) | 2009-03-09 | 2014-10-01 | 巴斯夫欧洲公司 | Process for preparing substituted 2-nitrobiphenyls |
US20130338369A1 (en) | 2011-03-07 | 2013-12-19 | Basf Se | Process for the Synthesis of Aminobiphenylene |
EP2546229A1 (en) | 2011-07-15 | 2013-01-16 | Friedrich-Alexander-Universität Erlangen-Nürnberg | Method for synthesising aminobiphenyls |
WO2013132006A1 (en) | 2012-03-07 | 2013-09-12 | Friedrich-Alexander-Universität Erlangen-Nürnberg | Method for synthesising aminobiphenyls using aryl hydrazines |
KR102082532B1 (en) | 2012-08-20 | 2020-02-27 | 마낙 가부시끼가이샤 | Method for producing borinic acid derivative, and novel borinic acid derivative |
WO2015011032A1 (en) | 2013-07-23 | 2015-01-29 | Bayer Cropscience Ag | Improved process for preparing chlorinated biphenylanilides and biphenylanilines |
BR112016024801B1 (en) | 2014-04-25 | 2021-01-12 | Bayer Cropscience Aktiengesellschaft | process to prepare biphenylamines from anilides by ruthenium catalysis |
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CN104478726A (en) * | 2014-12-01 | 2015-04-01 | 南通嘉禾化工有限公司 | Method of preparing 2-nitrobiphenyl compound |
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