Catalyst for asymmetric epoxidations of enones and process for producing optically active epoxide employing it

摘要

A complex catalyst for asymmetric epoxidation of enones, which comprises:(A) an optically active binaphthol,(B) lanthanum triisopropoxide,(C) triphenylphosphine oxide, and(D) cumene hydroperoxide or tert-butyl hydroperoxide.