Gold(I) catalyzed hydroamination of alkenes and alkynes using hemilabile phosphine ligand

Au(PPO)Cl complex is a new gold catalyst which has been studied for hydrofunctionalizations of alkenes and alkynes. The bisphosphine monoxide is coordinated at the metal center as hemilabile ligand. In order to probe the proton interaction at the phosphinoxide moiety, which may act as proton shuttle in hydrofunctionalization reactions, 31P nuclear magnetic resonance spectroscopic studies of the bisphosphine monoxide gold(I) chloro complex with tetrafluoroboric acid in various solvents were performed. The complex gave good catalysis results for hydroarylation and hydration of alkenes and triple bond compounds, while for the hydroamination of alkynes only moderate activity was observed. In this project gold(I) catalyst was studied for hydroamination reactions of both alkenes and alkynes under various reaction conditions, and using different types of amines. The activation of alkenes and alkynes at gold(I) center was studied. New bisphosphine monoxide gold(I) complexes were synthesized as catalysts precursors containing acetonitrile and trifluoroacetate as leaving ligand. The new gold(I) characterized were by 31P NMR spectroscopy