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Transition-Metal-Free Semihydrogenation of Diarylalkynes: Highly Stereoselective Synthesis of trans-Alkenes Using Na2S9H2O

Zhengwang Chen*, Miaoting Luo, Yuelu Wen, Guotian Luo and Liangxian Liu*

*Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, P.R. China, Email:,

Z. Chen, M. Luo, Y. Wen, G. Luo, L. Liu, Org. Lett., 2014, 16, 3020-3023.

DOI: 10.1021/ol501137x


Green water can be used as hydrogen donor for a highly stereoselective and efficient transition-metal-free semihydrogenation of various internal diarylalkynes to E-alkenes. The reactions are conducted under convenient conditions and provide products in good to excellent yields, with broad substrate scope.

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Key Words

semireduction of alkynes, green chemistry

ID: J54-Y2014