Recyclable Ag/g-C3N4 Catalyzed Visible-light Promoted Heterogeneous Synthesis of Unsymmetric Diaryl Chalcogenides

With Ag/g-C3N4 semiconductor as the heterogeneous photocatalyst, the visible light promoted heterogeneous synthesis of unsymmetric diaryl chalcogenides could be achieved under additive-free and mild conditions. A series of unsymmetric diaryl chalcogenides were generated in good to excellent yields with high functional group tolerance. The Ag/g-N-3(4) photocatalyst is easily recovered from the reaction mixture and reused at least 5 times, opening the way for larger-scale industrial applications of this type of photocatalytic bond-forming reactions.