Use of Ring-Expanded Diamino- and Diamidocarbene Ligands in Copper Catalyzed Azide鈥揂lkyne 鈥淐lick鈥?Reactions
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- 作者：Lee R. Collins ; Thomas M. Rookes ; Mary F. Mahon ; Ian M. Riddlestone ; Michael K. Whittlesey
- 刊名：Organometallics
- 出版年：2014
- 出版时间：October 27, 2014
- 年：2014
- 卷：33
- 期：20
- 页码：5882-5887
- 全文大小：475K
- ISSN：1520-6041
文摘
The two-coordinate ring-expanded N-heterocyclic carbene copper(I) complexes [Cu(RE-NHC)2]+ (RE-NHC = 6-Mes, 7-o-Tol, 7-Mes) have been prepared and shown to be effective catalysts under neat conditions for the 1,3-dipolar cycloaddition of alkynes and azides. In contrast, the cationic diamidocarbene analogue [Cu(6-MesDAC)2]+ and the neutral species [(6-MesDAC)CuCl]2 and [(6-MesDAC)2(CuCl)3] show good activity when the catalysis is performed on water.