Disclosed are a process for preparing an optically active 2-oxoimidazolidine derivative of the formula: ##STR1## wherein R.sup.1 represents hydrogen atom or a lower alkyl group, according to the process described in the specification; and a 3-acyl-2-oxoimidazolidine-4-carboxylin acid ester derivative having (S, R) configuration of the formula: ##STR2## wherein R.sup.2 represents a tert-butyl group or a benzyl group, and R.sup.3 represents a lower alkyl group or an aryl group.
揭示了一种制备光学活性2-氧代
咪唑啉衍
生物的方法,其
化学式为:其中R.sup.1代表氢原子或较低的烷基基团,根据说明书中描述的方法;以及一种具有(S, R)构型的3-酰基-2-氧代
咪唑啉-4-
羧酸酯衍
生物的
化学式为:其中R.sup.2代表叔丁基基团或苄基,R.sup.3代表较低的烷基基团或芳基。