Solvent-dependent regiochemical cyclotrimerisation of phenylacetylene with cobalt catalysts containing disulfide ligands: A case study

被引：64

作者：

Hilt, Gerhard ^{[1
]}

Hengst, Christoph ^{[1
]}

Hess, Wilfried ^{[1
]}

机构：

[1] Univ Marburg, Fachbereich Chem, D-35043 Marburg, Germany

来源：

EUROPEAN JOURNAL OF ORGANIC CHEMISTRY | 2008年 / 2008卷 / 13期

关键词：

cobalt; disulfide ligands; cyclotrimerisation; regioselectivity; heterogeneous catalysis;

D O I：

10.1002/ejoc.200800106

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

The intermolecular cobalt-catalysed cyclotrimerisation of phenylacetylene as a benchmark alkyne with [1,2-bis(4-methoxyphenylthio)ethane]cobalt dibromide gave the symmetrical 1,3,5-triphenylbenzene as the major product when dichloromethane was used as the solvent, whereas the unsymmetrical 1,2,4-trisubstituted product was obtained in acetonitrile in quantitative yield. Optimisation of the aromatic and aliphatic disulfide ligands in different solvents is discussed. ((c) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008).

引用

页码：2293 / 2297

页数：5

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