AbstractAn efficient and simple protocol for the synthesis of a new class of diversely functionalized novel indole and coumarin containing pyridine-3-carbonitrile derivatives has been described through one-pot four-component condensation reaction of 3-(1H-indol-3-yl)-3-oxopropanenitrile, various aldehydes, 3-acetyl-2H-chromenones, and ammonium acetate in acetic acid conditions. The present new methodology