Enantioselective One-Pot Conjugate Addition of Grignard Reagents Followed by a Mannich Reaction

被引:18
|
作者
Sebesta, Radovan [1 ]
Bilcik, Filip [1 ]
Fodran, Peter [1 ]
机构
[1] Comenius Univ, Fac Nat Sci, Dept Organ Chem, Bratislava 84215, Slovakia
关键词
Asymmetric catalysis; Michael addition; Mannich reaction; Copper; Ferrocene; TANDEM; KETONES;
D O I
10.1002/ejoc.201000773
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
Asymmetric addition of Grignard reagents to cyclohexenone, catalyzed by ferrocene diphosphanes, afforded chiral magnesium enolates. These enolates reacted in a one-pot arrangement with N-benzylidenetoluenesulfonamide to give beta-amino carbonyl compounds with three contiguous stereocenters. Two major diastereoisomers (dr = 60:40) of product with enantioselectivities up to 95 % ee were separated by flash chromatography.
引用
收藏
页码:5666 / 5671
页数:6
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