The direct C−H alkynylation of azoles with alkynyl bromides proceeds efficiently in the presence of a nickel-based catalyst system. The reaction enables the introduction of various alkynyl groups bearing aryl, alkenyl, alkyl, and silyl substituents to the azole cores. In some cases, addition of a catalytic amount of CuI is observed to accelerate the direct coupling dramatically.
Ligand and solvent-free iron catalyzed oxidative alkynylation of azoles with terminal alkynes
作者:Sachin S. Patil、Rahul P. Jadhav、Sachin V. Patil、Vivek D. Bobade
DOI:10.1016/j.tetlet.2011.08.083
日期:2011.10
A highly efficient and versatile iron catalyzed oxidative alkynylation of azoles with terminal alkynes under ligand and solvent-free conditions is described. (C) 2011 Elsevier Ltd. All rights reserved.