METHOD FOR PREPARING R- OR S- FORM - SUBSTITUTED HETEROCYCLIC CARBOXYL ACID DERIVATIVE USING ENZYME

摘要

Disclosed is a method for preparing an R- or S-forms of alpha-substituted heterocyclic carboxylic acid (alpha-HCCA) and a counter enantiomeric form of alpha-substituted heterocyclic carboxylic acid ester thereto by use of an enzyme. A racemic alpha-HCCA is reacted with alcohol to give a racemic alpha-HCCA ester, which is then brought into contact with an enzyme with enantioselectivity, whereby either R-form or S-form of the racemate is hydrolyzed. Extraction with an organic solvent can obtain enantiomers of the alpha-HCCA ester. Thus, a certain enantiomeric form of alpha-HCCA and a counter enantiomeric form of alpha-HCCA ester thereto, respectively can be prepared with high optical purity at high yields as well as at low cost.