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Method for Transforming Alkynes into (E)-Dibromoalkenes

Jiannan Xiang, Rui Yuan, Ruijia Wang, Niannian Yi, Linghui Lu, Huaxu Zou and Weimin He*

*State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China, Email:

J. Xiang, R. Yuan, R. Wang, N. Yi, L. Lu, H. Zou, W. He, J. Org. Chem., 2014, 79, 11378-11382.

DOI: 10.1021/jo501776b (free Supporting Information)


Copper(II) bromide as both the reacting partner and the catalyst enables a highly stereoselective and efficient dibromination of alkynes to yield (E)-dibromoalkenes. The reaction conditions are exceptionally mild, and a wide range of functional groups are well tolerated.

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ID: J42-Y2014