A novel transition metal complex, preferably a ruthenium-phosphine complex or rhodium-phosphine complex, which is effectively usable in various asymmetric syntheses and, in particular, is more effectively usable in the asymmetric hydrogenation of various ketones; and a novel process for producing an optically active alcohol with the complex. The novel transition metal complex includes a ligand obtained by introducing a diarylphosphino group into each of the 2- and 2′-positions of diphenyl ether, benzophenone, benzhydrol, or the like. It preferably further includes an optically active 1,2-diphenylethylenediamine coordinated thereto. The complex preferably is a novel diphosphine-ruthenium-optically active diamine complex or diphosphine-rhodium-optically active diamine complex. The process comprises using the complex as an asymmetric hydrogenation catalyst to conduct the asymmetric hydrogenation of a ketone compound to thereby obtain an optically active alcohol in a high optical purity and a high yield.
一种新型的过渡
金属配合物,优选为
钌膦配合物或
铑膦配合物,可有效用于各种不对称合成中,特别是在各种酮的不对称氢化反应中更有效地使用;以及一种使用该配合物生产光学活性醇的新工艺。该新型过渡
金属配合物包括通过将
二苯醚、苯甲酮、
苯甲醇等化合物的2-和2'-位引入二芳基膦基团而获得的
配体。它优选还包括一个光学活性的1,2-二苯
乙二胺配位。该配合物优选为新型
双膦钌-光学活性二胺配合物或新型
双膦铑-光学活性二胺配合物。该工艺包括使用该配合物作为不对称氢化催化剂,进行酮化合物的不对称氢化反应,从而高效地获得光学纯度高、收率高的光学活性醇。