Palladium carbene complexes derived from imidazolium-linked ortho-cyclophanes

被引:130
作者
Baker, MV [1 ]
Skelton, BW [1 ]
White, AH [1 ]
Williams, CC [1 ]
机构
[1] Univ Western Australia, Dept Chem, Nedlands, WA 6907, Australia
来源
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS | 2001年 / 02期
关键词
calixarenes; crown ethers; cryptands; cyclophanes; heterocycles; organometallic; structural studies; palladium;
D O I
10.1039/b007293l
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Reaction of imidazolium-linked ortho-cyclophanes with nickel(II) and palladium(II) salts in the presence of acetate base led to the formation of complexes where a metal centre is bound by a pair of heterocyclic carbenes which themselves are part of a cyclophane skeleton. These cyclophane-metal complexes have been characterised by NMR spectroscopy and (for five complexes) X-ray diffraction studies. The complexes are highly active as promoters of Heck and Suzuki couplings, with preliminary studies showing Heck reactions with turnover numbers approaching 10(7).
引用
收藏
页码:111 / 120
页数:10
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