Chirality Transfer Intramolecular Pauson-Khand Reaction with N-C Axially Chiral Sulfonamides Bearing an Ene-Yne Structure.

An intramolecular Pauson-Khand reaction with enantioenriched N-C axially chiral N -allyl- N -(2-alkynylphenyl)sulfonamide derivatives proceeded with complete chirality transfer from axial chirality ( P configuration) to central chirality ( R configuration), affording chiral nitrogen-containing tricyclic compounds (tetrahydrocyclopentaquinolin-2-one derivatives).