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Oxidation of 5-Aminotetraazoles, a New Route to Isocyanides

✍ Scribed by Priv.-Doz. Dr. Gerhard Höfle; Dipl.-Chem. Bernd Lange


Publisher
John Wiley and Sons
Year
1976
Tongue
English
Weight
242 KB
Volume
15
Category
Article
ISSN
0044-8249

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A new efficient route to imidazo[4,5-c]p
✍ Chiara B. Vicentini; Augusto C. Veronese; Maurizio Manfrini 📂 Article 📅 1997 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 276 KB

## Abstract The synthesis of imidazo[4,5‐__c__]pyrazol‐5‐ones (6) is reported. 5‐Amino‐4‐ethoxycarbonylaminopyra‐zoles 3a‐g when heated at 200° for 2 hours afford 6a‐g. In a similar manner imidazo[4,5‐__c__]pyrazol‐5‐one (6a) is readily obtained from 4‐amino‐5‐ethoxycarbonylaminopyrazole (5a).