Ni(II)-catalyzed Conia-ene reaction of 1,3-dicarbonyl compounds with alkynes |
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| Authors: | Gao Qiang Zheng Bao-Fu Li Jin-Heng Yang Dan |
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| Institution: | Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, PR China. |
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| Abstract: | reaction: see text]. We have discovered a Ni(II)-catalyzed Conia-ene reaction of 1,3-dicarbonyl compounds with alkynes. In the presence of Ni(acac)2 and Yb(OTf)3, various acetylenic 1,3-dicarbonyl compounds underwent Conia-ene reaction to give mono- and bicyclic olefinic cyclopentanes. A mechanism involving the enol-yne-Ni complex formation is proposed and supported by deuterium-labeling experiments. |
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