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POLYFUNCTIONAL PYRAZOLES. 11. SYNTHESIS OF 5-AROYLPYRANO[3,4-с]PYRAZOL-7(2Н)-ONES

Михаил К. Братенко, Марианна М. Барус, Михаил В. Вовк
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Abstract


Aroylmethyl esters of 4-formylpyrazole-3-carboxylic acids underwent intramolecular cyclocondensation in the presence of sodium acetate in refluxing acetic anhydride, giving moderate yields of 5-aroylpyrano[3,4-с]pyrazol-7(2Н)-ones.

Authors: Mykhailo K. Bratenko*, Marianna M. Barus, Mykhailo V. Vovk


Keywords


aroylmethyl esters; 5-aroylpyrano[3,4-с]pyrazoles; 4-formylpyrazole-3-carboxylic acids; intramolecular cyclocondensation

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