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A new general and efficient synthesis of imidazo[4,5-c]pyrazole derivatives

✍ Scribed by Chiara Beatrice Vicentini; Augusto Cesare Veronese; Paolo Giori; Bruno Lumachi; Mario Guarneri

Book ID
108371835
Publisher
Elsevier Science
Year
1990
Tongue
French
Weight
958 KB
Volume
46
Category
Article
ISSN
0040-4020

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A new efficient route to imidazo[4,5-c]p
A new efficient route to imidazo[4,5-c]pyrazol-5-ones
✍ 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).