Patent ID: 6072081
Filing Date: 2000-06-06
Classification: C07B,C07C,C07D

Abstract:
A process for producing an optically active cyclopropanecarboxylic acid derivative of the formula [VII]: ##STR12## wherein R.sub.5, R.sub.6, R.sub.7 and R.sub.8 are the same or different and represent hydrogen atom, halogen atom, alkyl group, aralkyl group, aryl group, alkenyl group, alkyl group substituted with halogen atom or alkenyl group substituted with halogen atom, with the proviso that when R.sub.5 and R.sub.6 represent the same group, then R.sub.7 and R.sub.8 represent different groups, andR.sub.9 represents alkyl group, cycloalkyl group or phenyl group which may be substituted,which comprises reacting a prochiral olefin of the formula [V]: ##STR13## wherein R.sub.5, R.sub.6, R.sub.7 and R.sub.8 are as defined above, with a diazoacetic acid ester of the formula [VI]:N.sub.2 CHCO.sub.2 R.sub.9 [VI]wherein Rg is as defined above,in the presence of a copper complex prepared by contacting an optically active bisoxazoline compound of the formula [I] ##STR14## wherein R.sub.1 represents alkyl group, cycloalkyl group, aralykyl group, phenyl group which may be substituted or alkoxy group and two geminal alkyl groups may be joined together to form a cyclic structure;R.sub.2 represents a phenyl group which may be substituted;R.sub.3 represents hydrogen atom, (C2-C4)alkyl group or cycloalkyl group; andthe asterisk * represents an asymmetric carbon atom with a copper compound.