DIPHOSPHINE LIGAND AND TRANSITION METAL COMPLEX USING THE SAME

摘要

The present invention provides a novel ligand represented by the following formula and a novel transition metal complex having the ligand, which shows superior enantioselectivity and catalytic efficiency, particularly high catalyst activity, in various asymmetric synthesis reactions.
A transition metal complex having, as a ligand, a compound represented by the formula
wherein R 4 is a hydrogen atom or a C 1-6 alkyl group optionally having substituent(s), and R 5 and R 6 are each a C 1-6 alkyl group optionally having substituent(s), or the formula
is a group represented by the formula
wherein ring B is a 3- to 8-membered ring optionally having substituent (s) .