“…Recently, molecular iodine has been used in many organic transformations [13][14][15] and, even though its catalytic action has not been completely investigated from a mechanistic point of view, 16,17 its mild Lewis acidity makes this system compatible with many different substrates. Compared to other catalysts, iodine possesses many advantages such as high tolerance to air and moisture, low-cost, ready availability and high catalytic activity in both dilute and highly concentrated conditions as well as under solvent-free reaction conditions.…”