A series of chiral bisphosphine ligands were designed and synthesized based on single-handed quinoline oligoamidefoldamers. The bisphosphine ligands can coordinate with Rh(cod)2BF4 in a 1 : 1 stoichiometry and the resulted chiral Rh(I) catalysts were applied in the asymmetric hydrogenation of α-dehydroamino acid esters, in which excellent conversions and promising levels of enantioselectivity were
Axial 4,4′,6,6′-Tetrakis-trifluoromethyl-biphenyl-2,2′-diamine (TF-BIPHAM): Resolution and Applications in Asymmetric Hydrogenation
作者:Chun-Jiang Wang、Feng Gao、Gang Liang
DOI:10.1021/ol8018677
日期:2008.11.6
The racemic TF-BIPHAM was resolved for the first time, and the effectiveness of the resolved diamine was demonstrated by highly enantioselective hydrogenation of alpha-aryl enamides and (x-dehydroamino acid esters using readily accessible bis(aminophosphine) ligands.