A NEW ASYMMETRIC-SYNTHESIS OF TRICARBONYLCHROMIUM COMPLEXES OF ORTHO-SUBSTITUTED BENZALDEHYDES

被引：40
|
作者：
KUNDIG, EP
LIU, RG
RIPA, A
机构：
[1] Départment de Chimie Organique, Université de Genève, Genève, CH-1211, 30, quai Ernest-Ansermet
来源：
HELVETICA CHIMICA ACTA | 1992年 / 75卷 / 08期
关键词：
D O I：
10.1002/hlca.19920750818
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
ortho-Substituted [Cr(CO)3(benzaldehyde)) complexes are obtained via nucleophilic addition of alkyl- and aryllithium reagents to a [Cr(CO)3(phenylmethaneimine)] complex followed by endo-hydride abstraction with triphenylmethyl cation. This sequence, when carried out with a [Cr(CO)3(benzaldehyde SAMP hydrazone)] complex affords substituted derivatives (Me, Bu, Ph, vinyl) with high ( greater-than-or-equal-to 97 %) diastereoselectivity and, after hydrolysis, ortho-substituted [Cr(CO)3(benzaldehyde)] ((S)-1) complexes of high enantiomeric purity.
引用
收藏
页码：2657 / 2660
页数：4
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