MONOPHOSPHINE COMPOUNDS TRANSITION METAL COMPLEXES THEREOF AND PRODUCTION OF OPTICALLY ACTIVE COMPOUNDS USING THE COMPLEXES AS ASYMMETRIC CATALYSTS

摘要

The present invention provides a compound represented by the formula (I): wherein ring A is void or a benzene ring optionally having suhstituent(s). Rl and R2 are each independently a phenyl group optionally having substituent(s). a cvclohexvl group and the like, R3 and R4 are each independently a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group and the like, and X is a residue represented by -OR5 or -NHR6 wherein R5 and R6 are a lower alkyl group optionally having suhstituent(s). an aralkvl group optionally having substituent(s) and the like, a asymmetric transition metal complex containing the compound as a ligand and a production method of optically active compound using the complex as an asymmetric catalyst.