Regioselective cyclotrimerization of phenylacetylenes to 1,2,4-triarylbenzenes catalyzed by iridium-diphosphine complexes

被引：28

作者：

Farnetti, E ^{[1
]}

Marsich, N ^{[1
]}

机构：

[1] Univ Trieste, Dipartimento Sci Chim, I-34127 Trieste, Italy

来源：

JOURNAL OF ORGANOMETALLIC CHEMISTRY | 2004年 / 689卷 / 01期

关键词：

iridium; diphosphines; homogeneous catalysis; alkynes; cyclotrimerization;

D O I：

10.1016/j.jorganchem.2003.10.004

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The organoiridium derivatives HIr(cod)(P-P) (cod = 1,5-cyclooctadiene; P-P = dppm (bis(diphenylphosphino)methane), dppe (1,2-bis(diphenylphosphino)ethane), dppp (1,3-bis(diphenylphosphino)propane), dppb (1,4-bis(diphenylphosphino)butane)) catalyze the regioselective cyclotrimerization of phenylacetylene as well as of its derivatives p-CH(3)OC(6)H(4)Cequivalent toCH and p-CF(3)C(6)H(4)Cequivalent toCH. The catalytic activity of the precursors as well as the selectivity towards formation of the 1,2,4-triarylbenzenes (up to 100%) are influenced by the diphosphine, and both increase by decreasing the size of the phosphine-iridium chelate ring. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：14 / 17

页数：4

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