Electrochemical Cascade Annulation for the Synthesis of 3-Phenylsulfanylquinoline Derivatives Under Mild Conditions

An efficient electrochemical approach has been developed for the construction of 3-phenylsulfanylquinoline derivatives by treating phenylethynylbenzoxazinanones with aryl disulfide in an undivided cell. The protocol provided a convenient route to functionalized quinolines with good functional group tolerance. Moreover, it does not require any metal catalysts or additives, furnishing a series of biological quinolines in moderate to good yields.