Asymmetric hydrogenations catalysed by diphosphinite rhodium complexes derived from natural tartaric acid
作者:Jean Bourson、Laureano Oliveros
DOI:10.1016/s0022-328x(00)89118-4
日期:1982.4
Two chiral diphosphinites, derived from natural tartaric acid, have been prepared and used as ligands for the preparation of two asymmetric hydrogenation catalysts, which were isolated in a crystalline state. After several weeks storage, these catlysts are still effective in the asymmetric hydrogenation of α-acetamido- and α-benzamido-cinnamic acid, citraconic acid, 2-phenyl-1-butene. In the hydrogenation
已经制备了两种衍生自天然酒石酸的手性二亚膦酸酯,并将其用作制备两种不对称氢化催化剂的配体,所述两种不对称氢化催化剂以结晶状态分离。储存数周后,这些催化剂在α-乙酰氨基-和α-苯甲酰胺基肉桂酸,柠康酸,2-苯基-1-丁烯的不对称氢化中仍然有效。在氨基酸前体的氢化中,光学产率为14-44%。从给定的基底开始,每次两个对映体可通过我们的两种催化剂,它们是这样彼此互补的一个的适当选择而获得。考虑了氢化中各种因素对光学产率的影响。