been studied from aryl bromide and phenol/aryl disulfide/diselenide substrates. A series of unsymmetrical diaryl chalcogenides were accessedfrom aryl bromide and diaryl dichalcogenide precursors by using 2.5 equiv of potassium tert-butoxide in DMSO at 80 °C. Unsymmetrical diaryl ethers were also obtained by using phenol precursors at 40–45 °C. Aryl bromides with methyl, trifluoromethyl, methoxy and