Abstract A number of saturated abnormal N-heterocyclic carbene (NHC) complexes of gold, in combination with KBAr F 4 as activator, were successfully applied in the chemoselective addition of hydrazine to alkynes. The reaction proceeds even at room temperature, which was not possible to date with gold catalysts. The reaction can be applied to a number of substituted arylalkynes. With alkylalkynes the yields are low. The saturated abnormal NHC ...
