Tris-arylcyclopropenium Carbocation Catalyzed Inter and Inter-molecular Hydroolefination Reactions

Abstract

Cyclopropenium ion salt has been utilized as a Lewis acid for the 1,6-conjugate hydroolefinaton of alkenes to para-quinone methides via intramolecular and intermolecular fashion. This transformation requires mild conditions and applies to various functional groups. This protocol provides easy access to indene and vinyl diarylmethane derivatives in medium to excellent yields.