Silver Triflate-Catalyzed Cyclopropenation of Internal Alkynes with Donor-/Acceptor-Substituted Diazo Compounds
John F. Briones and Huw M. L. Davies*
*Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States, Email: hmdavieemory.edu
J. F. Briones, H. M. L. Davies, Org. Lett., 2011, 13, 3984-3987.
Silver triflate is an efficient catalyst for the cyclopropenation of internal alkynes using donor-/acceptor-substituted diazo compounds as carbenoid precursors to yield highly substituted cyclopropenes, which cannot be synthesized directly via rhodium(II)-catalyzed carbenoid chemistry.
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