Visible-light promoted cascade annulation of N-propargylamines with sodium sulfinates to access sulfonylated 9H-pyrrolo[1,2-a]indoles and quinolines

A photo-initiated efficient protocol for the synthesis of sulfonylated 9H-pyrrolo[1,2-a]indoles and quinolines from N-propargylamines and easily available sodium sulfinates has been reported. This approach uses mild reaction conditions, requires no transition metal catalysis, photocatalyst, and shows a broad substrate scope.