Amino Acid Based Phosphoramidite Ligands for the Rhodium-Catalyzed Asymmetric Hydrogenation
作者:Pierre-Alain R. Breuil、Joost N. H. Reek
DOI:10.1002/ejoc.200901044
日期:2009.12
were obtained; up to 97 % ee is obtained for the asymmetric hydrogenation of 4 with Sb-1e. For ligands with two sources of chirality match/mismatcheffects are observed, the diastereoisomer Sb-1b giving higher selectivity than the diastereoisomer Rb-1b for most of the substrates. The set of phosphoramidite ligands having the flexible and cheap biphenol backbone is developed to study the ability of the