Metallocene-appended imidazoles displaying virtual planar chirality

被引：32

作者：

Jones, G ^{[1
]}

Richards, CJ ^{[1
]}

机构：

[1] Cardiff Univ, Dept Chem, Cardiff CF10 3TB, S Glam, Wales

来源：

ORGANOMETALLICS | 2001年 / 20卷 / 06期

关键词：

D O I：

10.1021/om0009583

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

(S)-1-(1-Alkylethyl(imidazoles 6a/b (alkyl cyclohexyl, tert-butyl) containing a 2-(eta (5)-cyclopentadienyl)(eta (4)-tetraphenylcyclobutadiene)cobalt substituent are readily synthesized. The effect of the bulky metallocene is to place the imidazoles in. an environment of virtual planar chirality as revealed by X-ray crystallography (of 6a), NOE difference NMR spectroscopy, and also their highly diastereoselective reactions with Pd(OAc)(2) resulting in new palladacycles 7a/b with (S)-(pR) configurations. The ability of the imidazole complexes to act as nucleophilic catalysts was investigated, weak activity being found for the promotion of the reaction between ethanol and dimethylchlorophosphate.

引用

页码：1251 / 1254

页数：4

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