Rhodium-catalyzed asymmetric hydrogenation of β-acetylamino acrylonitriles
摘要:
The rhodium-catalyzed asymmetric hydrogenation of beta-acetylamino acrylonitriles was investigated by using monophosphine and bisphosphine ligands. It was found that an Rh-QuinoxP* complex exhibited high enantioselectivities for beta-aryl substituted beta-acetylamino acrylonitriles and the Rh-JosiPhos CyPF-t-Bu complex was proven to be effective for the hydrogenation of tetrasubstituted olefins from cyclic beta-acetylamino acrylonitriles. (C) 2011 Elsevier Ltd. All rights reserved.