Photoinduced Tandem Cyclization of Alkynes with Phenylsulfinic Acids: Access to Sulfone-Substituted Dioxodibenzothiazepines or Dibenzazepines

Abstract Photoinduced tandem cyclization of alkynes with phenylsulfinic acids has been accomplished, which gives a mild strategy for the preparation of sulfone-substituted seven-membered N-heterocycles. A variety of scaled-up experiments, further transformations, and mechanistic studies were also operated in the follow-up work.