Efficient Copper(II) Acetate Catalyzed Homo- and Heterocoupling of Terminal Alkynes at Ambient Conditions
作者:Venkitasamy Kesavan、Kaluvu Balaraman
DOI:10.1055/s-0030-1258199
日期:2010.10
in quantitative yields using the copper(II) acetate catalyzed homocoupling of terminalalkynes in the presence of a stoichiometric amount of piperidine at 25 ˚C under aerobic conditions. We also accomplished facile syntheses of unsymmetric 1,3-diynes by heterocouplingterminalalkynes in very good yields under the reported reaction conditions. terminalalkynes - copper(II) acetate - piperidine - homocoupling
A Cu-catalyzed selective aerobic heterocoupling of terminal alkynes is disclosed, which enables the synthesis of a broad range of unsymmetrical 1,3-diynes in good to excellent yields. The results disprove the long-held belief that homocouplings are exclusively favored in the GlaserHay reaction.