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Reactions of 2-aryl-4-arylidene-4H-oxazol-5-ones with 3-amino-1,2,4-triazole, 5-aminotetrazole, and 2-aminobenzimidazole

✍ Scribed by V. A. Chebanov; S. M. Desenko; S. A. Kuzmenko; V. A. Borovskoy; V. I. Musatov; Yu. V. Sadchikova

Publisher
Springer
Year
2004
Tongue
English
Weight
275 KB
Volume
53
Category
Article
ISSN
1573-9171

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## Abstract The reaction of 3‐amino‐1,2,4‐triazole (**1**) with __N__‐arylmaleimides leads to azolopyrimidines **4** and **5**. The 2‐aminobenzimidazole (**2**) in the reaction with **3** gives the pyrimidobenzimidazoles **6**. In similar conditions, the reaction of amine **2** with maleic anhydrid

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Azopyrazolobenzylidene derivatives of 4-amino-1,2,4-triazol-3-ones. Synthesis of 4-{[4-(3,5-dimethyl-1H-pyrazol-4-yl)diazenyl]-benzylidene}amino-2-aryl-5-methyl-3H-[1,2,4]-triazol-3-ones
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The Schiff bases 3a-h obtained from 4-amino-1,2,4-triazol-3-ones 1a-h when subjected to Japp-Klingemann reaction yielded the corresponding 3-{2-[(2-aryl-5-methyl-3H-[1,2,4]-triazol-3-one-4-yl)]-iminophenyl}-pentane-2,4-diones 4 a-h. These diones on cyclisation with N 2 H 4 yielded the title compound

4-Amino-3-(1,2,4-triazol-1-yl)-1H-1,2,4-
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✍ Xu, Liang-Zhong ;Yu, Guan-Ping ;Xu, Feng-Ling ;Li, Wei-Hua πŸ“‚ Article πŸ“… 2005 πŸ› International Union of Crystallography 🌐 English βš– 230 KB

In the molecule of the title compound, C 5 H 7 N 7 S, the essentially planar triazole ring and the 4-amino-5-mercapto-1,2,4-triazole moiety make a dihedral angle of 70.97 (5) . In the crystal structure, weak intermolecular N-HÁ Á ÁN and N-HÁ Á ÁS hydrogen bonds stabilize the packing.