An Efficient Synthesis of Pyrido[3,2-c]coumarins under Microwave Irradiation in Solvent-Free Conditions

Synthesized 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.