Thianthrene Radical Cation as a Transient <scp>SET</scp> Mediator: Photoinduced Thiocyanation and Selenocyanation of Arylthianthrenium Salts^†

A novel transient SET mediator approach has been developed for the photoinduced radical-radical cross coupling reaction. Using in-situ generated thianthrene radical cation as mediator, thiocyanation and selenocyanation of aryl thianthrenium salts have realized under mild conditions without need photocatalyst or single electron donor. In comparison with enabled process, protocol features conditions, simple manipulation, a broad substrate scope, excellent functional group heterocycle tolerance. Due to feasible accessibility salts, this method also applied in efficient synthesis bioactive molecule, late-stage functionalization complex arenes. Appendix S1: Supporting Information Please note: The publisher is not responsible content functionality any supporting information supplied by authors. Any queries (other than missing content) should be directed corresponding author article.