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On triazoles XLV [1]. synthesis of 5,7-diamino-1,2,4-triazolo[1,5-a] [1,3,5]triazines

✍ Scribed by Gábor Berecz; László Pongó; István Kövesdi; József Reiter

Publisher: Journal of Heterocyclic Chemistry
Year: 2002
Tongue: English
Weight: 84 KB
Volume: 39
Category: Article
ISSN: 0022-152X
DOI: 10.1002/jhet.5570390214

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✦ Synopsis

Abstract

Dedicated to Professor András Messmer on the occasion of his 80^th^ birthday

The reaction of differently substituted 5‐amino‐1,2,4‐triazoles (5) with isothiourea derivatives (3) to yield isomeric 5,7‐diamino‐1,2,4‐triazolo[1,5‐a][1,3,5]triazines (6 and 7), previously described as not proceeding in melt, was performed in different solvents as well as in the melt at 150‐160°. It was proved that the above reaction had rather general validity. The structure of isomers 6 and 7 were proved spectroscopically. The structure of 6/5 (Q = ethylamino) was corroborated with single crystal X‐ray diffraction determination, as well.

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