High molecular weight stereoregular head-tail poly(glucaramides)
A method of producing high molecular weight stereoregular head, tail-poly(alkylene D-glucaramides) is described. Amidoamino acids are esterified in cold alcohol and then polymerized in a protic solvent to form steroregular prepolymers. The prepolymers are then further polymerized by dissolving them in a solvent to form larger, purer postpolymers. Compositions of matter prepared using the subject method are also described.
1. A method of producing a stereoregular head, tail-poly(alkylene D-glucaramide) postpolymer, the method comprising the steps of:
a) esterifying an amidoamino acid in an alcohol, wherein the amidoamino acid is derived from D-glucaric acid and an alkylene diamine, the amide bond between C-6 of the glucaryl unit and one nitrogen from one of the amine units of the alkylene diamine. the amidoamino acid having a single amine unit at the alkylene terminus and a carboxylic acid unit at the C-1, D-glucaryl terminus;
b) polymerizing the esterified amidoamino acid in a protic solvent in the presence of a tertiary amine to form a stereoregular prepolymer; and
c) polymerizing the stereoregular prepolymer in a solvent that is different from the solvent of step b) to form the stereoregular head, tail-poly(alkylene D-glucaramide) postpolymer.
2. The method of claim 1 , wherein said alcohol is selected from the group consisting of methanol, ethanol, propanol and isopropanol containing a strong acid.
3. The method of claim 1 , wherein said method further comprises the step of, after a), isolating said esterified amidoamino acid by solvent removal under mild conditions.
4. The method of claim 1 , wherein said amidoamino acid is selected from the group consisting of 6-[N-(2′-aminoethyl)]-D-glucaramide and salts thereof, 6-[N-(4′-aminobutyl)]-D-glucaramide and salts thereof, 6-[N-(6′-aminohexyl)]-D-glucaramide, and salts thereof, and 6-[N-(12′-aminododecyl)]D-glucaramide, and salts thereof.
5. The method of claim 1 , wherein said protic solvent of step 1 b ) is selected from the group consisting of methanol, ethanol, propanol, and isopropanol.
6. The method of claim 1 , wherein said solvent of step 1 c ) is a mixture of at least one protic polar solvent and, at least one aprotic polar solvent.
7. The method of claim 1 , wherein said stereoregular prepolymer is polymerized in a solvent in the presence of a tertiary amine.
8. A product produced by the method of claim 1 , wherein said amidoamino acid is a sodium salt of 6-[N-(2′-aminoethyl)]-D-glucaramide.
9. A product produced by the method of claim 1 , wherein said amidoamino acid is a sodium salt of 6-[N-(4′-aminobutyl)]-D-glucaramide.
10. A product produced by the method of claim 1 , wherein said amidoamino acid is a sodium salt of 6-[N-(6′-aminohexyl)]-D-glucaramide.
11. A product produced by the method of claim 1 , wherein said amidoamino acid is a sodium salt of 6-[N-(12′-aminododecyl)]-D-glucaramide.
12. A product produced by the method of claim 1 , wherein said amidoamino acid is a sodium salt of 6-[N-(2′-aminoethyl)]-D-glucaramide and said stereoregular head,tail-poly(alkylene D-glucaramide) postpolymer has a repeating unit C 8 H 14 O 6 N 2 , a degree of polymerization of about 8.0, an average molecular weight of about 1,874 and an estimated molecular weight of about 3,841.
13. A stereoregular head, tail-poly(alkylene D-glucaramide) postpolymer produced by a method comprising the steps of:
a) esterifying an 6-[N-(4′-aminobutyl)]-D-glucaramide in an alcohol;
b) polymerizing the esterified 6-[N-(4′-aminobutyl)]-D-glucaramide in a protic solvent in the presence of a tertiary amine to form a stereoregular prepolymer; and
c) polymerizing the stereoregular prepolymer in a solvent that is different from the solvent in step b) to form the stereoregular head, tail-poly(alkylene D-glucaramide) postpolymer;
wherein said stereoregular head,tail-poly(alkylene D-glucaramide) postpolymer has a repeating unit C 10 H 18 O 6 N 2 , a degree of polymerization of about 30.0, a number average molecular weight of about 7,868 and an estimated weight average molecular weight of about 16,129.
14. A stereoregular head, tail-poly(alkylene D-glucaramide) postpolymer produced by a method comprising the steps of:
a) esterifying an 6-[N-(6′-aminohexyl)]-D-glucaramide in an alcohol;
b) polymerizing the esterified 6-[N-(6′-aminohexyl)]-D-glucaramide in a protic solvent in the presence of a tertiary amine to form a stereoregular prepolymer; and
c) polymerizing the stereoregular prepolymer in a solvent that is different from the solvent in step b) to form the stereoregular head, tail-poly(alkylene D-glucaramide) postpolymer;
wherein said stereoregular head,tail-poly(alkylene D-glucaramide) postpolymer has a repeating unit C 12 H 22 O 6 N 2 , a degree of polymerization of about 42.7, a number average molecular weight of about 12,400 and an estimated weight average molecular weight of about 25,410.
15. A stereoregular head, tail-poly(alkylene D-glucaramide) postpolymer produced by a method comprising the steps of:
a) esterifying an 6-[N-(12′-aminododecyl)]-D-glucaramide in an alcohol;
b) polymerizing the esterified 6-[N-(12′-aminododecyl)]-D-glucaramide in a protic solvent in the presence of a tertiary amine to form a stereoregular prepolymer; and
c) polymerizing the stereoregular prepolymer in a solvent that is different from the solvent in step b) to form the stereoregular head, tail-poly(alkylene D-glucaramide) postpolymer;
wherein said stereoregular head, tail-poly(alkylene D-glucaramide) postpolymer has a repeating unit C 18 H 34 ,O 6 N 2 , a degree of polymerization of about 17.6, a number average molecular weight of about 6,590 and an estimated weight average molecular weight of about 16,477.