PROCESS FOR PREPARING OPTICALLY ACTIVE 2-OXOIMIDAZOLIDINE DERIVATIVES

摘要

Disclosed are a process for preparing an optically active 2-oxoimidazolidine derivative of the formula: (I) wherein R1 represents hydrogen atom or a lower alkyl group, according to the process described in the specification; and a 3-acyl-2-oxoimidazolidine-4-carboxylic acid ester derivative having (S, R) configuration of the formula: wherein R2 represents a tert-butyl group or a benzyl group, and R3 represents a lower alkyl group or an aryl group.