Synthesis and Biological Screening of Pyrano[2,3-b]quinoline Derivatives

Herein, a novel ionic liquid catalyzed synthesis of 3-acetylpyrano[2,3-b]quinolin-2(1H)-ones (3a-e) from substituted 3-formylquinolin-2(1H)-ones (1a-e) and ethyl acetoacetate (2) through Knoevenagel condensation is reported. We have perceived the application of microwave irradiation and ionic liquid for carrying out pollution free and ecofriendly chemical reactions. These reactions proceeded much faster in ionic liquid medium under microwave...