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Addition of hydrazine to 4,7-dihydro[1,2,4]triazolo[1,5-a]pyrimidines: Hydrazine derivatives of 4,5,6,7-tetrahydro[1,2,4]triazolo[1,5-a]pyrimidine

✍ Scribed by Sergey A. Komykhov; Konstantin S. Ostras; Kyryl M. Kobzar; Vladimir I. Musatov; Sergey M. Desenko

Publisher: Journal of Heterocyclic Chemistry
Year: 2009
Tongue: English
Weight: 63 KB
Volume: 46
Category: Article
ISSN: 0022-152X
DOI: 10.1002/jhet.218

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✦ Synopsis

Abstract

magnified image The 7‐aryl‐4,7‐dihydro[1,2,4]triazolo[1,5‐a]pyrimidines 1a, 1b, 1c can undergo addition of hydrazine to the enamine double bond leading to hydrazine derivatives of tetrahydrotriazolopyrimidines 2a, 2b, 2c; the process is usually accompanied by partial opening of pyrimidine ring leading to 3a, 3b. J. Heterocyclic Chem., (2009).

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