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

摘要

A catalyst for asymmetric epoxidation of enones, , which comprises:(A) an optically active binaphthol,(B) lanthanum triisopropoxide, and(c) tri(4-fluorophenyl)phosphine oxide, tri(4-chlorophenyl)phosphine oxide or tri(4-trifluoromethylphenyl)phosphine oxide.