Process for producing a biodegradable polymer
AssigneeMitsubishi Kasei Corporation
InventorYoshiharu Kimura
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Abstract
A process for producing a biodegradable polymer, which comprises subjecting a cyclic compound of the following formula (1) or (2) to ring opening polymerization: ##STR1## wherein R.sub.1 is a C.sub.1-10 alkyl group, ##STR2## wherein R.sub.2 is a C.sub.1-10 alkyl group, and R.sub.3 is a hydrogen atom or a C.sub.1-10 alkyl group.
Claims6
A process for producing a biodegradable polymer, which comprises subjecting a cyclic compound of the following formula (1) or (2) to ring opening polymerization:
- ##STR8## wherein R.sub.1 is a C.sub.1-10 alkyl group, ##STR9## wherein R.sub.2 is a C.sub.1-10 alkyl group, and R.sub.3 is a hydrogen atom or a C.sub.1-10 alkyl group.
A cyclic compound of the formula (1):
- ##STR10## wherein R.sub.1 is a C.sub.1-10 alkyl group.
A process for producing a cyclic compound of the formula (1):
- ##STR11## wherein R.sub.1 is a C.sub.1-10 alkyl group, which comprises cyclically trimerizing a compound of the formula (3):
- ##STR12## wherein R.sub.1 is as defined above and R.sub.4 is a C.sub.1-10 alkyl group, by an ester exchange catalyst.
A cyclic compound of the formula (2):
- ##STR13## wherein R.sub.2 is a C.sub.1-10 alkyl group, and R.sub.3 is a hydrogen atom or a C.sub.1-10 alkyl group.
A process for producing a cyclic compound of the formula (2):
- ##STR14## wherein R.sub.2 is a C.sub.1-10 alkyl group, and R.sub.3 is a hydrogen atom or a C.sub.1-10 alkyl group, Which comprises reacting a compound of the formula (4):
- HO--CHR.sub.2 --CH.sub.2 COOH (4)
- wherein R.sub.2 is as defined above, with a compound of the formula (5):
- X--CHR.sub.3 --CO--Y (5)
- wherein R.sub.3 is as defined above, and each of X and Y is a halogen atom, to form a compound of the formula (6):
- ##STR15## wherein R.sub.2, R.sub.3 and X are as defined above, and then subjecting the compound of the formula (6) to a ring closure reaction.
Dependencies are inferred from the claim text.