Asymmetric synthesis using catalysts containing multiple stereogenic centres and a trans-1,2-diaminocyclohexane core;: reversal of predominant enantioselectivity upon N-alkylation

被引:27
作者
Cobb, AJA [1 ]
Marson, CM [1 ]
机构
[1] UCL, Dept Chem, Christopher Ingold Labs, London WC1H 0AJ, England
基金
英国工程与自然科学研究理事会;
关键词
amine ligands; catalysis; asymmetric synthesis; carbonyl alkylation; Michael addition;
D O I
10.1016/j.tet.2004.11.030
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
N-Methylation of ligands containing a trans-1,2-diaminocyclohexane core and multiple stereogenic centres is shown to provide the product of the opposite configuration in significant enantiomeric excess, in the addition of diethylzinc to aldehydes. Some of the ligands were effective in an asymmetric Michael addition. (C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1269 / 1279
页数:11
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