engleski

Syntheses of some new coumarin-quinolone carboxylic acids

Aminocoumarin derivatives 3-10 were condensed with diethyl ethoxymethylenemalonate to give intermediates 11-18. Thermal cyclizations of intermediates give benzopyranopyridinecarboxylates 19-26. These esters were hydrolyzed to the corresponding benzopyranopyridine carboxylic acids 27-34.

coumarin; ethoxymethylenemalonate; benzopyranopyridine carboxylic acids; coumain-quinolone carboxylic acids; synthesis

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