t‐BuOH Solvent for CuSeO3CatalyzedCsp2‐SeCross‐coupling of Diaryldiselenide with Arylhalides and Boronic acids

Abstract Formation of carbon‐selenium bond by Csp 2 ‐Se cross‐coupling using diaryldiselenides and arylhalides are very few in literature. Herein we report CuSeO 3 .2H 2 O as an efficient catalyst for direct Csp 2 ‐Se cross‐coupling of diaryldiselenides with aryl iodides, bromides and aryl boronic acids. The reaction is performed at low temperature (70 °C) in tert ‐butanol solvent in absence of ligand. Arylboronic acids are more reactive than aryliodides and bromides.