CA2449698A1 - Methods of synthesizing substantially monodispersed mixtures of polymers having polyethylene glycol moieties - Google Patents

Methods of synthesizing substantially monodispersed mixtures of polymers having polyethylene glycol moieties Download PDF

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Publication number
CA2449698A1
CA2449698A1 CA002449698A CA2449698A CA2449698A1 CA 2449698 A1 CA2449698 A1 CA 2449698A1 CA 002449698 A CA002449698 A CA 002449698A CA 2449698 A CA2449698 A CA 2449698A CA 2449698 A1 CA2449698 A1 CA 2449698A1
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formula
compounds
substantially monodispersed
monodispersed mixture
polymers
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CA002449698A
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French (fr)
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CA2449698C (en
Inventor
Nnochiri N. Ekwuribe
Christopher H. Price
Aslam M. Ansari
Amy L. Odenbaugh
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Biocon Ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
    • C08G65/32—Polymers modified by chemical after-treatment
    • C08G65/329—Polymers modified by chemical after-treatment with organic compounds
    • C08G65/334—Polymers modified by chemical after-treatment with organic compounds containing sulfur
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
    • C08L71/02—Polyalkylene oxides

Abstract

Methods of synthesizing a substantially monodispersed mixture of polymers comprising polyethylene glycol moieties include: reacting a substantially monodispersed mixture of compounds having the structure of Formula I: R1(OC2H4)n-O-X+ (I) wherein R1 is H or a lipophilic moiety; n is from 1 to 2 5; and X+ is a positive ion, with a substantially monodispersed mixture of compounds having the structure of Formula II: R2(OC2H4)m-OMs (II) wherein R2 is H or a lipophilic moiety; and m is from 1 to 25,under conditions sufficie nt to provide a substantially monodispersed mixture of polymers comprising polyethylene glycol moieties and having the structure of Formula III: R2(OC2H4)m+n-OR1(III).

Claims (41)

1. A method of synthesizing a substantially monodispersed mixture of polymers comprising polyethylene glycol moieties, said method comprising:
reacting a substantially monodispersed mixture of compounds having the structure of Formula I:
R1(OC2H4)m-O-X+ (I) wherein R1 is H or a lipophilic moiety; m is from 1 to 25; and X+ is a positive ion, with a substantially monodispersed mixture of compounds having the structure of Formula II:
R2(OC2H4)n-OMs (II) wherein R2 is H or a lipophilic moiety; and n is from 1 to 25, under conditions sufficient to provide a substantially monodispersed mixture of polymers comprising polyethylene glycol moieties and having the structure of Formula III:
R2(OC2H4)m+n-OR1 (III).
2. The method according to Claim 1, wherein the molar ratio of the compounds of Formula I to the compounds of Formula II is greater than about 1:1.
3. The method according to Claim 1, wherein the molar ratio of the compounds of Formula I to the compounds of Formula II is at least about 2:1.
4. The method according to Claim 1, wherein R2 is a lipophilic moiety selected such that the polymers of Formula III are substantially insoluble in water.
5. The method according to Claim 1, wherein R2 is a lipophilic moiety selected such that the polymers of Formula III have a Log K ow greater than about 0.
6. The method according to Claim 1, wherein R2 is a fatty acid moiety or an ester of a fatty acid moiety.
7. The method according to Claim 6, wherein the fatty acid moiety or the ester of a fatty acid moiety comprises an alkyl moiety at least n carbon atoms in length.
8. The method according to Claim 7, wherein the molar ratio of the compounds of Formula I to the compounds of Formula II are greater than 1:1 such that the reaction of the compounds of Formula I with the compounds of Formula II provide a mixture comprising the polymers of Formula III and an excess of compounds of Formula I, said method further comprising:
separating the 1excess compounds of Formula I from the polymers of Formula III.
9. The method according to Claim 8, wherein the separating step comprises:
contacting the mixture of the excess compounds of Formula I and the polymers of Formula III with an aqueous medium; and collecting the polymers of Formula III.
10. The method according to Claim 8, wherein the separating step comprises:
contacting the mixture of the excess compounds of Formula I and the polymers of Formula III with an organic medium;
removing the excess of compounds of Formula I from the organic medium; and recovering the polymers of Formula III from the organic medium.
11. The method according to Claim 1, further comprising:
reacting a substantially monodispersed mixture of compounds having the structure of Formula V:
R2(OC2H4)n-OH (V) with a methanesulfonyl halide under conditions sufficient to provide a substantially monodispersed mixture of compounds having the structure of Formula II:
R2(OC2H4)n-OM s (II).
12. The method according to Claim 11, wherein the methanesulfonyl halide is methane sulfonyl chloride.
13. The method according to Claim 11, wherein the molar ratio of the methanesulfonyl halide to the compounds of Formula V is greater than about 1:1.
14. The method according to Claim 11, wherein the molar ratio of the methanesulfonyl halide to the compounds of Formula V is at least about 2:1.
15. The method according to Claim 11, wherein the reacting of a substantially monodispersed mixture of compounds having a structure of Formula V with a methanesulfonyl halide to provide a substantially monodispersed mixture of compounds of Formula II is performed at a temperature between about 0°C and about 40°C.
16. The method according to Claim 11, wherein the reacting of a substantially monodispersed mixture of compounds of Formula V with a methanesulfonyl halide to provide a substantially monodispersed mixture of compounds of Formula II is performed at a temperature between about 15°C and about 35°C.
17. The method according to Claim 11, wherein the reacting of a substantially monodispersed mixture of compounds of Formula V with methane sulfonyl halide to provide a substantially monodispersed mixture compounds of Formula II is performed for a period of time between about 0.25 hours and about 2 hours.
18. The method according to Claim 11, further comprising:
reacting a substantially monodispersed mixture of compounds having the structure of Formula VI:
R2-OMs (VI) wherein R1 is a lipophilic moiety;
with a substantially monodispersed mixture of compounds having the structure of Formula VII:
R3(OC2H4)m-O-X2+ (VII) wherein R3 is benzyl, trityl, or trimethylsilyl; and X2+ is a positive ion;
under conditions sufficient to provide a substantially monodispersed mixture of compounds having the structure of Formula VIII:
R3(OC2H4)m-OR2 (VIII); and reacting the substantially monodispersed mixture of compounds having the structure of Formula VIII under conditions sufficient to provide a substantially monodispersed mixture of compounds having the structure of Formula V:
R2(OC2H4)m-OH (V).
19. The method according to Claim 18, wherein R3 is benzyl.
20. The method according to Claim 1, further comprising:
reacting a substantially monodispersed mixture of compounds having the structure of Formula IV:
R1(OC2H4)n-OH (IV) under conditions sufficient to provide a substantially monodispersed mixture of compounds having the structure of Formula I:
R1(OC2H4)n-O-X+ (I).
21. The method according to Claim 20, wherein the reacting of a substantially monodispersed mixture of compounds having a structure of Formula IV under conditions sufficient to provide a substantially monodispersed mixture of compounds of Formula I
comprises:
reacting a substantially monodispersed mixture of compounds having the structure of Formula IV with a compound capable of ionizing the hydroxyl moiety of the compound of Formula IV under conditions sufficient to provide the substantially monodispersed mixture of compounds having the structure of Formula I.
22. The method according to Claim 21, wherein the molar ratio of the compound capable of ionizing the hydroxyl moiety to the compound of Formula I is greater than about 1:1.
23. The method according to Claim 21, wherein the molar ratio of the compound capable of ionizing the hydroxyl moiety to the compound of Formula I is at least about 2:1.
24. The method according to Claim 21, wherein the compound capable of ionizing the hydroxyl moiety is a strong base.
25. The method according to Claim 24, wherein the strong base is selected from the group consisting of sodium hydride, potassium hydride, sodium t-butoxide, potassium t-butoxide, and sodium amide.
26. The method according to Claim 24, wherein the strong base is sodium hydride.
27. The method according to Claim 20, wherein the reacting of a substantially monodispersed mixture of compounds of Formula IV under conditions sufficient to provide a substantially monodispersed mixture of compounds of Formula I is performed at a temperature between about 0°C and about 40°C.
28. The method according to Claim 20, wherein the reacting of a substantially monodispersed mixture of compounds of Formula IV under conditions sufficient to provide a substantially monodispersed mixture of compounds of Formula I is performed at a temperature between about 15°C and about 35°C.
29. The method according to Claim 20, wherein the reacting of a substantially monodispersed mixture of compounds of Formula IV under conditions sufficient to provide a substantially monodispersed mixture of compounds of Formula I is performed for a period of time between about 0.25 and about 4 hours.
30. The method according to Claim 1, wherein at least about 96, 97, 98 or 99 percent of the compounds in the mixture of polymers of Formula III have the same molecular weight.
31. The method according to Claim 1, wherein the mixture of polymers of Formula III is a monodispersed mixture.
32. A monodispersed mixture of polymers comprising polyethylene glycol moieties, said polymers synthesized by the method of Claim 1.
33. A method of synthesizing a substantially monodispersed mixture of polymers comprising polyethylene glycol moieties, said method comprising:
reacting a substantially monodispersed mixture of compounds having the structure of Formula I:
R1(OC2H4)m-O-X1+ (I) wherein R1 is H or lower alkyl; m is from 1 to 25; and X1+ is a positive ion, with a substantially monodispersed mixture of compounds having the structure of Formula II:
R2(OC2H4)n-OMs (II) wherein R2 is H or lower alkyl; and n is from 1 to 25, under conditions sufficient to provide a substantially monodispersed mixture of polymers comprising polyethylene glycol moieties and having the structure of Formula III:
R2(OC2H4)m+n-OR1 (III).
34. The method according to Claim 33, wherein m + n is at least 7.
35. The method according to Claim 33, wherein R1 is H and R2 is methyl.
36. The method according to Claim 33, further comprising:
reacting the substantially monodispersed mixture of polymers comprising polyethylene glycol moieties and having the structure of Formula III:
R2(OC2H4)m+n-OR1 (III) wherein R1 is H and R2 is lower alkyl, with a methane sulfonyl halide under conditions sufficient to provide a substantially monodispersed mixture of polymers having the structure of Formula IX:
R2(OC2H4)m+n-OMs (IX); and reacting the substantially monodispersed mixture of polymers having the structure of Formula IX with a substantially monodispersed mixture of compounds having the structure of Formula X:
H(OC2H4)p-O-X2+ (X) wherein X2+ is a positive ion; and p is from 1 to 25, under conditions sufficient to provide a substantially monodispersed mixture of polymers having the structure of Formula XI:
R2(OC2H4)m+n+p-OH (XI).
37. A method of synthesizing a substantially monodispersed mixture of polymers comprising polyethylene glycol moieties, said method comprising:
reacting a substantially monodispersed mixture of compounds having the structure of Formula I:
R1(OC2H4)m-O-X1+ (I) wherein R1 is lower alkyl; m is from 1 to 25; and X1+ is a positive ion, with a substantially monodispersed mixture of compounds having the structure of Formula II:
R2(OC2H4)n-OMs (II) wherein n is from 1 to 25; and R2 is an ester of a fatty acid, under conditions sufficient to provide a substantially monodispersed mixture of polymers comprising polyethylene glycol moieties and having the structure of Formula III:
R2(OC2H4)m+n-OR1 (III).
38. The method according to Claim 37, further comprising:
reacting the substantially monodispersed mixture of polymers having the structure of Formula III under conditions sufficient to hydrolyze the ester moiety to provide a carboxylic acid moiety.
39. The method according to Claim 37, further comprising:
reacting a substantially monodispersed mixture of compounds having the structure of Formula VI:
R2-OMs (VI) wherein R2 is an ester of a fatty acid, with a substantially monodispersed mixture of compounds having the structure of Formula VII:
R3(OC2H4)n-O-X2+ (VII) wherein R3 is benzyl, trityl, or THP; n is from 1 to 25; and X2+ is a positive ion;
under conditions sufficient to provide a substantially monodispersed mixture of compounds having the structure of Formula VIII:
R3(OC2H4)n-OR2 (VIII);
reacting the substantially monodispersed mixture of compounds having the structure of Formula VIII under conditions sufficient to provide a substantially monodispersed mixture of compounds having the structure of Formula V:
H(OC2H4)n-OR2 (V); and reacting the substantially monodispersed mixture of compounds having the structure of Formula V under conditions sufficient to provide a substantially monodispersed mixture of compounds having the structure of Formula II.
40. The method according to Claim 39, wherein R2 is an ester of a fatty acid having the formula:
R4O(O)C(CH2)q~
wherein R4 is lower alkyl, and q is from 1 to 24.
41. The method according to Claim 40, wherein R4 is ethyl.
CA2449698A 2001-06-04 2002-06-04 Methods of synthesizing substantially monodispersed mixtures of polymers having polyethylene glycol moieties Expired - Fee Related CA2449698C (en)

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US09/873,731 2001-06-04
US09/873,731 US6835802B2 (en) 2001-06-04 2001-06-04 Methods of synthesizing substantially monodispersed mixtures of polymers having polyethylene glycol moieties
PCT/US2002/017619 WO2002098949A1 (en) 2001-06-04 2002-06-04 Methods of synthesizing substantially monodispersed mixtures of polymers having polyethylene glycol moieties

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