Surface organometallic chemistry of germanium: reactivity of chiral germane derivatives towards rhodium supported onto silica

被引：2
|
作者：
Taoufik, M [1 ]
Santini, C [1 ]
Basset, JM [1 ]
Candy, JP [1 ]
机构：
[1] CPE Lyon, Lab Chim Organomet Surface, CNRS, UMR 9986, F-69616 Villeneuve Dascq, France
来源：
JOURNAL DE CHIMIE PHYSIQUE ET DE PHYSICO-CHIMIE BIOLOGIQUE | 1997年 / 94卷 / 11-12期
关键词：
organogermane; enantioselectivity; heterogeneous catalyst;
D O I：
10.1051/jcp/1997941969
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
The chiral organogermane H(3)GeAdCH(2)CO(2)[(-)-menthyl], 2, reacts selectively with the metallic surface of catalyst Rh/SiO2 to afford the surface species {[H(x)GeAdCH(2)CO(2)(-)-menthyl](y)[Ge-o](0,3)}Rh-S/SiO2;y increasing from 0 to 0,7 when the quantity of 2 by surface atom of rhodium varies from 0,3 to 1. Catalysts with y=0,3 and 0,5 show low activity and give week enantioselective excess for the asymmetric hydrogenation of ketocompounds and alkene derivatives. These results can be explained either by electronic effect of germanium or steric hindrance of alkyl group.
引用
收藏
页码：1969 / 1974
页数：6
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