New diphosphine compound, that production intermediate field, the stereoselective hydrogenation catalytic converter null general expression which includes the succession metal complex and the said complex which designate the said

摘要

PROBLEM TO BE SOLVED: To provide a new diphosphine compound useful as the ligand of a catalyst, and to provide the new catalyst having excellent performances (chemical selectivity, enantioselectivity and catalyst activity) as a catalyst for asymmetric synthesis reactions, especially asymmetric hydrogenation reactions.;SOLUTION: This disphosphine compound is represented by the formula [R₁ and R₂ are each independently a lower alkyl, cycloalkyl, or (substituted) phenyl group or a five-membered heteroaromatic ring residue].;COPYRIGHT: (C)2004,JPO