Gold(I)-Catalyzed Tandem Cyclization–Selective Migration Reaction of 1,3-Dien-5-ynes: Regioselective Synthesis of Highly Substituted Benzenes

Highly substituted benzene derivatives have been easily prepared in a regioselective way from readily available 1,3-hexadien-5-ynes through a gold(I)-catalyzed tandem reaction. The process involves an initial cyclization followed by a selective Wagner–Meerwein shift in which the migration preference seems to be determined by the ability to stabilize a positive charge.