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Report | Regular issue | Vol 6, No. 7, 1977, pp.983-986
Published online, 1st January, 1970
DOI: 10.3987/R-1977-07-0983
Synthesis of 1H-Pyrano[2,3-c]pyrazole-4-ones

Misbahul Ain Khan,* Mario Celso Pagotto, and Gwynn Pennant Ellis*

*Seção de Quimica, Instituto Militar de Engenharia, Urca, 20.000 Rio de Janeiro, RJ, Brazil

Abstract

Various derivatives of the ring system-1H-pyrano[2,3-c]pyrazole-4-one have been obtained by the condensation of 4-acetyl-3-methyl-1-phenylpyrazol-5-one appropriate esters followed by cyclization with acids. Further reactions gave other derivatives of 1H-pyrano[2,3-c]pyrazole-4-one.