AbstractSynthesized some novel functionalized pyrido[3, 2‐c] coumarins from the reaction of 4‐chloro‐3‐formylcoumarins obtained from 4‐hydroxycoumarins, and aryl methyl ketones/ethyl acetoacetate/ethyl cyanoacetate in the presence of ammonium acetate under microwave irradiation in solvent‐free condition in excellent yields.