| abstract |
The present invention provides a novel phosphine compound, specifically to provide a novel phosphine compound useful as a ligand for the above catalysts, in particular, a novel catalyst having an excellent performance (chemical selectivity, enantio-selectivity, catalytic activity) as a catalyst for asymmetric synthetic reactions, particularly asymmetric hydrogenation. A diphosphine compound represented by the general formula (1): n n n wherein R 1 and R 2 each independently represents a lower alkyl group, a cycloalkyl group, an unsubstituted or substituted phenyl group, or a five-membered heteroaromatic ring residue. |