Phosphane??Free Copper??Catalyzed Decarboxylative Coupling of Alkynyl Carboxylic Acids with Aryl Halides under Aerobic Conditions

D Pan, C Zhang, S Ding, N Jiao

Index: Pan, Delin; Zhang, Chun; Ding, Shengtao; Jiao, Ning European Journal of Organic Chemistry, 2011 , # 25 p. 4751 - 4755

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Abstract

Abstract A phosphane-free copper-catalyzed decarboxylative cross-coupling reaction of alkynyl carboxylic acids 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 aryl iodides were conducted in the absence of a Pd catalyst. The ligand plays a key role in this kind of copper catalysis. NaNO 2 was disclosed to efficiently improve this kind of decarboxylative cross- ...

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