Journal of Heterocyclic Chemistry

Synthesis of 5H [l] benzopyrano [3, 4??b] pyridin??5??one and its derivatives

MA Khan, AL Gemal

Index: Khan,M.A.; Gemal,A.L. Journal of Heterocyclic Chemistry, 1977 , vol. 14, p. 1009 - 1012

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Citation Number: 15

Abstract

Abstract 3-Aminocoumarin undergoes the Skraup reaction to give a new ring system, 5H [l] benzo-pyrano [3, 4-b] pyridin-5-one (IVa). When 3-aminocoumarin was condensed with the ethoxy methylene derivatives of active methylene compounds, ethyl acetoacetate, and dimethyl acetylenedicarboxylate, the intermediates Vla-VIf were formed which on thermal cyclizations afforded other derivatives of 5H [l] benzopyrano [3, 4-b] pyridin-5-one (IVb-IVf) ...