Patent ID: 8742162

Claim:
A method for producing an optically active 1-N-(arylmethylene)amino-2-vinylcyclopropanecarboxylic acid ester represented by formula (3) (wherein Ar 1 and R 1 are as defined below, C* and C** represent an asymmetric carbon atom, C** is an S-configuration when C* is an R-configuration, and C** is an R-configuration when C* is an S-configuration), the method comprising a step of reacting an N-(arylmethylene)glycine ester represented by formula (1) (wherein Ar 1 represents an aromatic group, and R 1 represents an alkyl group having 1 to 12 carbon atoms or an alkenyl group having 2 to 12 carbon atoms), with a compound represented formula (2) (wherein Y 1 and Y 2 each independently represents a halogen atom, an alkanesulfonyloxy group having 1 to 6 carbon atoms, a perfluoroalkanesulfonyloxy group having 1 to 6 carbon atoms or a benzenesulfonyloxy group, in which one or more hydrogen atoms contained in the benzenesulfonyloxy group, each independently may be substituted with an alkyl group having 1 to 6 carbon atoms, a halogen atom or a nitro group), in the presence of a base and an optically active quaternary ammonium salt.