A Green and Efficient Approach for the Synthesis of 3-Chalcogen Benzo[<i>b</i>]Furans <i>via</i> I<sub>2</sub>-Mediated Cascade Annulation Reaction of 2-Alkynylanisoles at Room Temperature in Water
Abstract An efficient and green aqueous protocol to access 3-chalcogen benzo[b]furan derivatives has been developed. The reaction can proceed via I2-mediated intramolecular annulationreaction of 2-alkynylanisoles with diaryl disulfides (diselenides) in water or undersolvent-freeconditions at room temperature. With the participation of I2, a variety of 3-chalcogen benzo[b]furan derivatives were obtained