Asymmetric epoxidation reaction

摘要

A process for producing an optically active benzopyran compound of the formula [I] or [II]: <IMAGE> [I] <IMAGE> [II] in which an olefin compound of the formula [V] or [VI]: <IMAGE> [V] <IMAGE> [VI] is subjected to asymmetric epoxidation reaction, using, as a catalyst, an optically active manganese complex of the formula [III] or [IV]: <IMAGE> [III] <IMAGE> [IV]