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REACTIONS OF PYRAZOLE-3(5)-DIAZONIUM SALTS WITH 4-HYDROXY-2Н-CHROMEN-2-ONE AND ISOCHROMAN-1,3-DIONE

Ирина В. Леденева, Алена А. Грачева, Хидмет С. Шихалиев
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Abstract


Derivatives of a previously unknown heterocyclic system 6Н-chromeno[4,3-e]pyrazolo[5,1-c][1,2,4]triazin-6-one were obtained via reaction of pyrazole-3(5)-diazonium salts with 4-hydroxy-2Н-chromen-2-one. Analogous reactions with isochroman-1,3-dione are followed by recyclization leading to the formation of 2-(4-hydroxypyrazolo[5,1-c][1,2,4]triazin-3-yl)benzoic acids.

How to Cite
Ledenyova, I. V.; Gracheva, A. A.; Shikhaliev, K. S. Chem. Heterocycl. Compd. 2015, 51, 734. [Khim. Geterotsikl. Soedin. 2015, 51, 734.]

For this article in the English edition see DOI 10.1007/s10593-015-1766-6


Keywords


heterocyclic azo coupling components; pyrazole-3(5)-diazonium chloride; pyrazolo[5,1-c][1,2,4]triazine; azo coupling; intramolecular cyclocondensation; recyclization

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