Rhodium complexes of (R)-Me-CATPHOS and (R)-(S)-JOSIPHOS: highly enantioselective catalysts for the asymmetric hydrogenation of (E)- and (Z)-β-aryl-β-(enamido)phosphonates
作者:Simon Doherty、Julian G. Knight、Adam L. Bell、Shireen El-Menabawey、Christopher M. Vogels、Andreas Decken、Stephen A. Westcott
DOI:10.1016/j.tetasy.2009.05.023
日期:2009.7
Rhodium complexes of (R)-Me-CATPHOS and (R)-(S)-JOSIPHOS form a complementary pair of catalysts for the highly efficient asymmetric hydrogenation of a selection of (E)- and (Z)-beta-aryl-beta-(enamido)phosphonates, respectively, in the majority of cases giving excellent yields and ee's in excess of 99%: the highest to be reported for this Class Of substrate. (C) 2009 Elsevier Ltd. All rights reserved.