Iminopyridyl-palladium dendritic catalyst precursors: evaluation in Heck reactions

被引：53

作者：

Smith, GS ^{[1
]}

Mapolie, SF ^{[1
]}

机构：

[1] Univ Western Cape, Dept Chem, ZA-7535 Bellville, South Africa

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2004年 / 213卷 / 02期

基金：

新加坡国家研究基金会;

关键词：

metallodendrimer; pyridylimine; palladium; Heck;

D O I：

10.1016/j.molcata.2003.12.010

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Poly(propyleneimine)-iminopyridyl-palladium dendrimers, bearing palladium moieties on the periphery, were found to be effective catalyst precursors for Heck coupling. The dendritic complexes achieved high conversions in the reaction of iodobenzene with methyl acrylate, styrene and 1-octene. Reactions with electron-deficient olefins yield mainly beta-arylated products, whilst electron-rich olefins, yield a mixture of arylated products (beta, alpha), cis/trans isomers and beta,beta-disubstituted compounds. Generally, the metallodendrimer leads to higher conversions and the reactions proceed at a faster reaction rate, when compared to reactions using an analogous mononuclear palladium complex or the palladium salt, PdCl2 (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：187 / 192

页数：6

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