Chiral unsymmetric diphosphine compounds and transition metal complexes containing them as ligands

摘要

Novel chiral unsymmetric diphosphine compounds, represented by formula (I) : <CHEM> wherein Ar<1> and Ar<2>, which are different from each other, each represent a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, a pyridyl group, a quinolyl group, an isoquinolyl group, a furfuryl group, a benzofurfuryl group, a thienyl group, or a benzothienyl group. Transition metal complexes containing diphosphine compounds as ligands, where the complex catalyzes various asymmetric synthesis reactions, e.g., asymmetric hydrogenation or asymmetric hydrosilylation, exhibiting excellent performance in selectivity, conversion and catalytic activity, to provide a product of desired absolute configuration at high optical purity and in high yield.