Biphenol-Based Phosphoramidite Ligands for the Enantioselective Copper-Catalyzed Conjugate Addition of Diethylzinc
作者:Alexandre Alexakis、Damien Polet、Stéphane Rosset、Sébastien March
DOI:10.1021/jo049359m
日期:2004.8.1
Phosphoramidite ligands, based on ortho-substituted biphenols and a chiral amine, induce high enantioselectivities (ee's up to 99%) in the copper-catalyzed conjugate addition of dialkylzinc reagents to a variety of Michael acceptors. Particularly, the best reported ee's were obtained for acyclic nitroolefins.
基于邻位取代的双酚和手性胺的亚磷酰胺配体在铜催化的将二烷基锌试剂共轭添加到多种Michael受体中时,诱导出高对映选择性(ee高达99%)。特别是,对于无环硝基烯烃,获得了报道最好的ee。