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Transformations of phenylhydrazones of 5-acyl-1,2,4-triazines to pyrazolo[4,3-e][1,2,4]triazines or 4-cyanopyrazole

✍ Scribed by Mariusz Mojzych; Andrzej Rykowski

Publisher: Journal of Heterocyclic Chemistry
Year: 2007
Tongue: English
Weight: 310 KB
Volume: 44
Category: Article
ISSN: 0022-152X
DOI: 10.1002/jhet.5570440504

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✦ Synopsis

Abstract

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A simple and high yielding preparation of pyrazolo[4,3‐e][1,2,4]triazines and 4‐cyano‐3‐methyl‐1‐phenylpyrazole derivatives from corresponding phenylhydrazones of 5‐acyl‐1,2,4‐triazines by melt under acidic medium and by thermal heating, respectively.

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