CYCLOPENTENYLIDENE COMPLEXES FROM ALKINYLCARBENE COMPLEXES, ARYLLITHIUM AND H+

被引：34

作者：

FISCHER, H

MEISNER, T

HOFMANN, J

机构：

[1] Fakultät Für Chemie, Universität Konstanz, Konstanz, D-7750

来源：

CHEMISCHE BERICHTE | 1990年 / 123卷 / 09期

关键词：

Alkynylcarbene complexes; Bis(methylene)cyclopentene; Cyclopentenylidene complexes;

D O I：

10.1002/cber.19901230907

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Cyclopentenylidene Complexes from Alkinylcarbene Complexes, Aryllithium and H+ [Alkoxy(phenylethynyl)carbene]pentacarbonyl complexes of chromium and tungsten, (CO)5M[C(CCPh)OR] (1) (M  Cr, W, R  Me, Et) react with Li[C6H4R′‐p] (R′  H, Me) and HBF4 ‐ Et2O to give the vinylcarbene complexes (CO)5‐M{C[CHC(Ph)C6H4R′‐p]OR} 2 and two isomeric cyclopentenylidene complexes 3 and 4. The cyclopentenylidene ligand is formed from two carbene ligands of 1, [C6H4R′‐p]− and H+. The structure of 4a (M  W, R  Et, R′  Me) is established by an X‐ray structure analysis. The product ratio strongly depends on the reaction conditions. The complex 3c (M  Cr, R  R′  Me) reacts with ethyl vinyl ether to give the 3,5‐bis(methylene)cyclopentene derivative 8 by metathesis. Copyright © 1990 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：1799 / 1804

页数：6

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[1] ORGANIC SYNTHESES VIA TRANSITION-METAL COMPLEXES .2. 1-CHROMA-1,3-BUTADIENES AND 1-CHROMA-1,3,5-HEXATRIENES FROM (CO)5CR=C(OC2H5)CH3 BY CARBONYL OLEFINATION CATALYZED WITH TRIETHYLAMINE CHLOROTRIMETHYLSILANE [J].