Copper Powder–Mediated Homocoupling Reactions of Iodoacetylenes to Synthesize Symmetrical 1,3-Butadiynes
作者:Song Xue、Ling-Guo Meng、Qing-Xiang Guo
DOI:10.1080/00397910802026568
日期:2008.6.20
Abstract A new route to synthesize symmetrical 1,3-butadiynes from iodoacetylenes in the presence of copper powder and pyridine was developed. Moderate to excellent yields were obtained through an efficient and simple process involving the copper powder without any further activation.
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.