t‐BuOH Solvent for CuSeO3 Catalyzed Csp2‐Se Cross‐coupling of Diaryldiselenide with Arylhalides and Boronic acids.

Formation of carbon‐selenium bond by Csp2‐Se cross‐coupling using diaryldiselenides and arylhalides are very few in literature. Herein we report CuSeO3.2H2O as an efficient catalyst for direct Csp2‐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. [ABSTRACT FROM AUTHOR]