Patent ID: 7547790

Claim:
An optically active 4,4-di-substituted-oxazolidine compound having a formula (I) wherein R 1 represents a C 1 -C 3 alkyl group which is substituted with one substituent from a Substituent group A, a C 2 -C 3 alkenyl group which is substituted with one substituent selected from the Substituent group A, a halogenated methyl group, a hydroxymethyl group, a formyl group or a phosphonium methyl group, R 2 represents a C 1 -C 6 alkyl group, a C 3 -C 10 cycloalkyl group or a phenyl group, R 3 represents a methoxycarbonyl group, R 4 represents a C 1 -C 6 alkyl group or a C 2 -C 6 alkenyl group, the Substituent group A represents a phenyl group which is unsubstituted or substituted with from 1 to 3 substituents selected from the group consisting of a halogen atom, a cyano group, a phenyl group, a C 1 -C 8 alkyl group, a C 1 -C 8 alkoxy group and a C 2 -C 8 alkanoyl group; a thienyl group; a N-methylpyrrolyl group; or a furanyl group.