Catalyst- and metal-free C( sp 2 )–H bond selenylation of ( N -hetero)-arenes using diselenides and trichloroisocyanuric acid at room temperature

In this paper, we report an eco-friendly approach for the C( sp 2 )–H bond selenylation of imidazopyridines and other N -heteroarenes as well as simple arenes at ambient temperature. This new protocol consists of the reaction between ( N -hetero)-arenes and the diorganyl-diselenides and trichloroisocyanuric acid (TCCA)-ethanol reagent system. In a short reaction time, the desired selenylated products were obtained regioselectively in good yields, with tolerance for a wide range of functional groups.