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

Triphenylphosphine, iodide and -chloro-arylsulfonamides could generate amidyl radicals EDA (Electron Donor-Acceptor) complexes under visible light irradiation, and this strategy enables the synthesis of valuable δ-chloro-arylsulfonamide and -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.