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A one‐pot methodology is developed for the direct conversion of N‐formylamine, 2‐amino pyridine, and aldehyde into 2,3‐substituted imidazo[1,2‐a]pyridine heterocycles using I2‐PPh3‐Et3N reagent system under microwave irradiation. During the reaction, I2‐PPh3‐Et3N converts N‐formylamine into isocyanide, which in the presence of in‐situ generated hydrogen iodide (HI) undergoes Groebke‐Balckburn‐Bienaymé...