Visible light-induced PPh 3 /MI-promoted δ-C(sp 3 )-H chlorination and cyclization with N -chloro-arylsulfonamides via EDA complexes.

Triphenylphosphine, iodide and N -chloro-arylsulfonamides could generate amidyl radicals via EDA (Electron Donor-Acceptor) complexes under visible light irradiation, and this strategy enables the synthesis of valuable δ-chloro-arylsulfonamide and N -arylsulfonylpyrrolidine motifs in moderate yields. This blue LED-induced method utilizes more readily available reagents, providing advantages in terms of cost efficiency, broad substrate scope, and functional-group compatibility.