Process for preparing optically active alpha -cyano-3-(4-halogenophenoxy)-benzyl 2-(4-chlorophenyl)isovalerate

摘要

An optically active alpha -cyano-3-(4-halogenophenoxy)-benzyl 2-(4-chlorophenyl)isovalerate, which consists substantially of or is rich in (S)- alpha -cyano-3-(4-halogenophenoxy)benzyl (S)-2-(4-chlorophenyl)isovalerate; a method for preparing the same; and an insecticidal and/or acaricidal composition containing the same.