A Simple One-Pot Procedure for the Direct Homocoupling of Terminal Alkynes Promoted by Copper Nanoparticles

[摘要]：The reaction of different terminal alkynes with readily prepared copper(0) nanoparticles led to the formation of the corresponding symmetrical 1,4-disubstituted 1,3-diynes in good yield. No palladium, ligands, or oxidant additives were needed, For aliphatic terminal alkynes, the use of sodium carbonate as base markedly improved the reaction rate and allowed the use of a substoichiometric amount of the copper nanoparticles.

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