A new synthesis of pyrazolo [1, 5??d][1, 2, 4] triazines from pyrazolecarboxylic acid hydrazides and carbonyl compounds. I

E Tihanyi, M Gal, Ö Fehér…

文献索引：Tihanyi, E.; Gal, M.; Feher, Oe.; Dvortsak, P. Journal of Heterocyclic Chemistry, 1989 , vol. 26, p. 1045 - 1051

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被引用次数: 4

摘要

Abstract Pyrazolo [1, 5-d][1, 2, 4] triazines were synthesized from pyrazolecarboxylic acid hydrazides and carbonyl compounds. Pyrazolecarboxylic acid N-phenylhydrazide (1c) and formaldehyde gave not only the expected 4hn but 5, respectively. The methyl substituted hydrazides with acetone afforded hydrazones, pyrazolotriazines or 13 depending on the position of the substituents. The reduction of both products yielded pyrazolecarboxylic ...