Annulation of β-naphthols and 4-hydroxycoumarins with vinylsulfonium salts: synthesis of dihydrofuran derivatives

Annulation reaction of vinylsulfonium salts with β-naphthols and 4-hydroxycoumarins provided dihydrofuran derivatives in moderate to good yields under mild conditions.

Three-Component One-Pot Reactions of 2-Trifluoromethyl-N-nosylaziridine, Primary Amines, and Vinylsulfonium Salts for Convenient Access to CF3-Containing Piperazines

Trifluoromethylated piperazines were readily synthesized with excellent regioselectivity in high yields by the sequential reaction of 2-trifluoromethylated N-nosylaziridine (2-CF3-N-Ns-aziridine) with various primary amines, followed by treatment with vinylsulfonium salts, in one pot.