Asymmetric Hydrogenation of Heteroaromatic Ketones and Cyclic and Acyclic Enones Mediated by Cu(I)-Chiral Diphosphine Catalysts
作者:Hideo Shimizu、Takashi Ohshima、Kazushi Mashima、Takuto Nagano、Noboru Sayo、Takao Saito
DOI:10.1055/s-0029-1218347
日期:2009.12
Copper(I)-catalyzed asymmetric hydrogenation of heteroaromatic ketones, cyclic and acyclic enones is reported. The choice of the chiral diphosphine ligand highly influenced enantioselectivity as well as chemoselectivity. Highly enantioselective hydrogenation of ortho-substituted heteroaromatic ketones was achieved using BDPP as the ligand. In the 1,2-selective hydrogenation of acylic enone, SEGPHOS
报道了铜(I)催化的杂芳族酮、环状和无环烯酮的不对称氢化。手性二膦配体的选择极大地影响了对映选择性和化学选择性。使用BDPP作为配体实现了邻位取代的杂芳族酮的高度对映选择性氢化。在酰基烯酮的 1,2-选择性氢化中,SEGPHOS 比 BDPP 具有更高的对映选择性。另一方面,庞大的配体 DTBM-SEGPHOS 具有 1,4-选择性性质,导致环状烯酮的第一个高度 1,4-选择性和对映选择性氢化。