Novel scorpionate-type triscarbene ligands and their silver and gold complexes

被引：35

作者：

Biffis, Andrea ^{[1
]}

Lobbia, Giancarlo Gioia ^{[2
]}

Papini, Grazia ^{[2
]}

Pellei, Maura ^{[2
]}

Santini, Carlo ^{[2
]}

Scattolin, Elena ^{[1
]}

Tubaro, Cristina ^{[1
]}

机构：

[1] Univ Padua, Dept Chem Sci, I-35131 Padua, Italy

[2] Univ Camerino, Dept Chem Sci, I-62032 Camerino, MC, Italy

来源：

JOURNAL OF ORGANOMETALLIC CHEMISTRY | 2008年 / 693卷 / 25期

关键词：

Tris(carbene)borate; Silver(I); Gold(I); Imidazole; Catalysis; Sonogashira reaction;

D O I：

10.1016/j.jorganchem.2008.09.019

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

New silver(I) carbene complexes were obtained starting from the N-heterocyclic carbene ligand precursors {[HB(RImH)(3)]Br-2} (R = Bn, Mes and t-Bu) and {[HC(MeBImH)(3)](BF4)(3)}, by treatment of the imidazolium salt with Ag2O. Use of the tris-imidazolylborate precursors resulted in stable, well-characterized trimetallic complexes of general formula {Ag-3[HB(RIm)(3)](2)}Br, which were successfully employed as carbene transfer reagents in the synthesis of related gold(I) complexes by transmetallation. The silver complexes also proved to be active catalysts of the coupling of aryl iodides with terminal alkynes (the Sonogashira reaction), although related bimetallic silver complexes were found to exhibit enhanced reactivity. (C) 2008 Elsevier B. V. All rights reserved.

引用

页码：3760 / 3766

页数：7

共 55 条

[1] A STABLE CRYSTALLINE CARBENE [J].