Highly active catalysts in alkene metathesis: First observed transformation of allenylidene into indenylidene via alkenylcarbyne - Ruthenium species

被引：78

作者：

Castarlenas, R ^{[1
]}

Dixneuf, PH ^{[1
]}

机构：

[1] Univ Rennes, Inst Chim Rennes, CNRS, UMR 6509, F-35042 Rennes, France

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2003年 / 42卷 / 37期

关键词：

carbenes; carbyens; heterogeneous catalysis; metathesis; ring-opening polymerization; ruthenium;

D O I：

10.1002/anie.200352108

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A cat. for all seasons: The transformation of the allenylidene-ruthenium complexes [RuCl(η6-arene) (=C=C=CR2) (PR′3)] [CF3SO3] into indenylidene species [RuCl(η6-arene) (indenylidene) (PR′3)] [CF3SO3]2 by the simple protonation with CF3SO3H and formation of an alkenylcarbyne intermediate (see picture; arene = p-cymene) is observed by low temperature NMR experiments. The new in situ generated 18 electron ionic indenylidene species are highly active in the polymerization of cyclooctene and cyclopentene, ring-closing metathesis of dienes and enynes, and the acyclic diene metathesis of decadiene, thus making it a catalyst for all seasons.

引用

页码：4524 / 4527

页数：4

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