Patent ID: 6342627
Filing Date: 2002-01-29
Classification: C07C

Abstract:
A process for producing an unsaturated ester of the formula (3): wherein R1, R2 and R3 independently represent a hydrogen atom, a halogen atom, an alkyl group which may be substituted, an alkenyl group which may be substituted, an aralkyl group which may be substituted or an aryl group which may be substituted andR5 represents: an alkyl group which may be substituted with an alkoxy group, a phenoxy group, a cyano group, a dialkylamino group, a cycloalkyl group or a halogen atom, an aralkyl group which may be substituted with an alkyl group, an alkoxy group, a phenoxy group, a nitro group, a cyano group or a halogen atom, or an aryl group which may be substituted with an alkyl group, an alkoxy group or a halogen atom, which comprises subjecting an unsaturated ester of the formula (1): wherein R1, R2 and R3 have the same meaning as defined above andR4 represents an alkyl group having 1 to 10 carbon atoms which may be substituted or a phenyl group which may be substituted, to a transesterification reaction with a hydroxy compound of the formula (2): â€ƒR5OHâ€ƒâ€ƒ(2)wherein R5 has the same meaning as defined above, in the presence of a lanthanoide metal alkoxide.