Rh(I)-Catalyzed Enantioselective Hydrogenation of α-Substituted Ethenylphosphonic Acids
作者:Kaiwu Dong、Zheng Wang、Kuiling Ding
DOI:10.1021/ja305780z
日期:2012.8.1
A class of chiral Rh(I) catalysts containing monodentate phosphorous aciddiesters tautomerized from the corresponding secondary phosphine oxides was discovered by serendipitous hydrolysis of phosphoramidite ligands. The evolved catalysts demonstrated unprecedented enantioselectivities (98-99% ee) and high catalytic activities (as low as 0.01 mol% catalyst loading) in asymmetric hydrogenations of a