Efficient [(NHC)Au(NTf2)]-catalyzed hydrohydrazidation of terminal and internal alkynes

The efficient hydrohydrazidation of terminal (6a-r, 18 examples, 0.1-0.2 mol % [(NHC)Au(NTf2)], T = 60 °C) and internal alkynes (7a-j, 10 examples, 0.2-0.5 mol % [(NHC)Au(NTf2)], T = 60-80 °C) utilizing a complex with a sterically demanding bispentiptycenyl-substituted NHC ligand and the benign reaction solvent anisole, is reported.