CuI-Catalyzed, Symmetrical Diaryl Sulfides Synthesis from Aryl Halides in the Presence of KF/Al<sub>2</sub>O<sub>3</sub>: Using Thiourea and Thiosemicarbazide as Sulfur Donor Sources

A convenient one-pot synthetic method is described for the synthesis of symmetrical diaryl sulfides via CuIcatalyzed cross-coupling reactions of various aryl halides and thiosemicarbazide (thiourea) in the presence of KF/Al2O3. Keywords: Cross-coupling reactions, CuI, KF/Al2O3, thiourea, thiosemicarbazide, diaryl sulfides.