METHOD FOR PRODUCING CHIRAL .ALPHA.,.BETA.-EPOXY KETONES

摘要

A process is claimed for the enantioselective epoxidation of .alpha.,.beta.-unsaturated ketones, inwhich a compound of the general formula I,(see formula I)is reacted with an oxidizing agent to form .alpha.,.beta.-epoxy ketones of thegeneral formula II,(see formula II)in which R1, R2, R3 are as defined above. The .alpha.,.beta.-epoxy ketones ofthe general formula II canbe obtained in good yields and outstanding enantioselectivities from.alpha.,.beta.-unsaturated ketonesof the general formula I by epoxidation with hydrogen peroxide in the presenceof a chiralcatalyst, such as amino compounds and their acid addition salts.