Process for producing optically active hemiesters

Details Process for producing optically active hemiesters Process for producing optically active hemiesters

C - Chemistry, Metallurgy

07

D

C07D 233/32 (2006.01) C07C 67/08 (2006.01)

Patent

CA 2334746

There is disclosed a process for producing an optically active hemiester of formula (1): Image wherein R1, R2 and R5 represent the same meanings as described below, which comprises reacting a cyclic acid anhydride of formula (2): Image wherein R1 and R2 are different and independently represent a hydrogen atom, a halogen atom, an alkyl group optionally substituted with an alkoxy group or a halogen atom, and the like, with a hydroxy compound of formula (3): R3OH (3) wherein R3 represents an alkyl group optionally substituted with an alkoxy group, a phenoxy group, a dialkylamino group or a halogen atom and the like, in the presence of an asymmetric catalyst.

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