Patent ID: 7125692

Claim:
A process for producing a monomer represented by the following general formula 1, wherein R 1 represents hydrogen or optionally substituted alkyl; R 2 , R 3 and R 4 each independently represent hydrogen or a substituent; X and Y each independently represent a direct bond or optionally substituted alkylene with 1 to 3 chain members, and Z represents a direct bond or substituted alkylene with 1 chain member, comprising carrying out esterification or transesterification between a compound represented by the following general formula 2: wherein R 2 , R 3 , R 4 , X, Y and Z are defined as described above for general formula 1, and a compound represented by the following general formula 3: wherein R 1 is defined as described above for general formula 1 and R 5 represents hydrogen or a substituent, in the presence of a biocatalyst.