SEARCH Articles Figures Tables 3- coumarin, reaction with 3- coumarin, reaction with ketones Coumarin-3-carboxylic acid Knoevenagel reaction Coumarin-3-carboxylic acid, 3,4-dihydro-3-substitutedesters Knoevenagel reaction Coumarins Diels—Alder reaction Coumarins Knoevenagel reaction Coumarins Pechmann reaction Coumarins Perkin reaction Palladium-catalyzed coumarin formation reaction Synthesis of Coumarins via Pechmann Reaction