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New application of heterocyclic diazonium salts. Synthesis of pyrazolo[3,4-d][1,2,3]triazin-4-ones and imidazo[4,5-d][1,2,3]triazin-4-ones

✍ Scribed by Juan Pablo Colomer; Elizabeth Laura Moyano

Publisher
Elsevier Science
Year
2011
Tongue
French
Weight
603 KB
Volume
52
Category
Article
ISSN
0040-4039

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✦ Synopsis

The pyrazolo [3,4-d][1,2,3]triazin-4-ones 3 and imidazo [4,5-d][1,2,3]triazin-4-ones 4 are analogs structurally related to purines that have showed a wide and significant variety of biological activity. These compounds were synthesized by one-pot diazotization of 5-amino-1H-pyrazole-4-carbonitriles 1 and 5-amino-1H-imidazole-4-carbonitriles 2, respectively.

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Synthesis of some novel 3,7-dimethyl-4H-
Synthesis of some novel 3,7-dimethyl-4H-pyrazolo[5,1-c][1,2,4]triazin-4-ones
✍ Ahmed A. El-Barbary; Mahmoud A. El-Badawi; Yasser M. Loksha πŸ“‚ Article πŸ“… 2001 πŸ› Journal of Heterocyclic Chemistry 🌐 English βš– 66 KB

## Abstract Some novel 3,7‐dimethyl‐6__H__‐pyrazolo[5,1‐c][1,2,4]triazin‐4‐ones were prepared **(3a‐g)**. Compounds **3a,b** were treated with hydrazines to afford various products **7a,b, 8a,b, 9 and lla,b** depending on the type of hydrazine derivative and reaction conditions. The benzoyloxyimino