Highly Enantioselective Pd-Catalyzed Asymmetric Hydrogenation of <i>N</i>-Diphenylphosphinyl Ketimines
作者:Yong-Gui Zhou、You-Qing Wang
DOI:10.1055/s-2006-939712
日期:——
A variety of substituted N-diphenylphosphinyl imines were hydrogenated using Pd(CF3CO2)2/(S)-SEGPHOS as a catalyst with high enantioselectivities (86.7%-98.6% ee).
Enantioselective Strecker-type reaction of phosphinoyl ketimines catalyzed by a chiral Zr-bipyridyldiol catalyst
作者:Yi-Jing Chen、Chinpiao Chen
DOI:10.1016/j.tetasy.2008.09.011
日期:2008.9
An enantioselective Strecker reaction of N-diphenylphosphinoyl ketimines with TMSCN employing a chiral zirconium complex formed from chiral bipyridyl diol 1 as catalyst is described. The catalytic efficiency of chiral ligand 1 with other Lewis acids was also explored. Higher yields (50-85%) with moderate to good enantioselectivities (30-80%) were achieved for a variety of N-diphenylphosphinoyl ketimines. (C) 2008 Elsevier Ltd. All rights reserved.