Phosphane-Free Copper-Catalyzed Decarboxylative Coupling of Alkynyl Carboxylic Acids with Aryl Halides under Aerobic Conditions
作者:Delin Pan、Chun Zhang、Shengtao Ding、Ning Jiao
DOI:10.1002/ejoc.201100659
日期:2011.7.18
A phosphane-free copper-catalyzed decarboxylativecross-coupling reaction of alkynyl carboxylicacids with aryl halides was developed. CuBr (1–5 mol-%) was used as a catalyst in the presence of a β-diketone ligand in air. The reactions of aryliodides were conducted in the absence of a Pd catalyst. The ligand plays a key role in this kind of copper catalysis. NaNO2 was disclosed to efficiently improve