A Hollow-shaped Caged Triarylphosphine: Synthesis, Characterization and Applications to Gold(I)-catalyzed 1,8-Enyne Cycloisomerization

A hollow-shaped caged triarylphosphine with three bulky triarylmethyl substituents at the positions meta to the P atom was synthesized. Its gold(I) complex was synthesized and characterized by NMR spectroscopy and X-ray diffraction analysis. A cationic gold(I) complex with this ligand was applied to 1,8-enyne cycloisomerization. A hollow-shaped caged triarylphosphine with three bulky triarylmethyl substituents at the positions meta to the P atom was synthesized. Its gold(I) complex was synthesized and characterized by NMR spectroscopy and X-ray diffraction analysis. A cationic gold(I) complex with this ligand was applied to 1,8-enyne cycloisomerization.