Process for producing optically active cyclopropanecarboxylic acid esters
申请人:SUMITOMO CHEMICAL COMPANY LIMITED
公开号:EP0891965A1
公开(公告)日:1999-01-20
A process for producing an optically active cyclopropanecarboxylic acid ester which is characterized by reacting a prochiral olefin with a diazoacetic acid ester in the presence of a copper complex obtained by reacting an optically active bisoxazoline ligand with a copper compound.
Copper complexes of optically active bisoxazolines as enantioselective catalysts in cyclopropanation reactions
申请人:Sumitomo Chemical Company, Limited
公开号:EP0895992A2
公开(公告)日:1999-02-10
An optically active bisoxazoline compound of the formula [I]:
wherein R1 represents an alkyl group, cycloalkyl group, aralkyl group, phenyl group which may be substituted or an alkoxy group and two geminal alkyl groups may be joined together to form a cyclic structure;
R2 represents an alkyl group , cycloalkyl group, aralkyl group or phenyl group which may be substituted;
R3 represents a hydrogen atom, (C2-C4)alkyl group or cycloalkyl group; and
the asterisk * represents an asymmetric carbon atom.