Copper-NHC-Mediated Semi-Hydrogenation and Hydroboration of Alkynes: Enhanced Catalytic Activity Using Ring-Expanded Carbenes

Jonathan Hall, Darcy Unson, Paul Brunel, Lee Collins, Mateusz Cybulski, Mary Mahon, Michael Whittlesey

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A series of two-coordinate copper tert-butoxide complexes bearing five-, six-, and seven-membered ring N-heterocyclic carbenes, prepared by protonolysis of (NHC)CuMes with tBuOH, have been used as catalytic precursors in the semihydrogenation of alkynes with silanes/tBuOH and the hydroboration of alkynes with HBPin. Both processes proceed with high regioselectivity and show enhancements with six- and seven-membered ring carbenes.
Original languageEnglish
Pages (from-to)3102-3110
Number of pages9
Issue number18
Early online date31 Aug 2018
Publication statusPublished - 24 Sep 2018

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