Biphenol-based phosphoramidite ligands for the enantioselective copper-catalyzed conjugate addition of diethylzinc

被引:120
作者
Alexakis, A [1 ]
Polet, D [1 ]
Rosset, S [1 ]
March, S [1 ]
机构
[1] Univ Geneva, Dept Organ Chem, CH-1211 Geneva 4, Switzerland
关键词
D O I
10.1021/jo049359m
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
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.
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页码:5660 / 5667
页数:8
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