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. Author manuscript; available in PMC: 2014 Jun 17.
Published in final edited form as: Angew Chem Int Ed Engl. 2013 May 2;52(25):6508–6512. doi: 10.1002/anie.201301601

Scheme 1.

Scheme 1

A) Trapping α-oxo gold carbenes generated via intermolecular alkyne oxidation by internal and external nucleophiles. B) Mor-DalPhos and the previously calculated relative energies of the corresponding gold carbene species, in kcal/mol, at PBE1PBE/6-311+G** level.[6]