
Journal of Heterocyclic Chemistry p. 629 - 632 (1997)
Update date:2022-08-03
Topics:
Vicentini, Chiara B.
Veronese, Augusto C.
Manfrini, Maurizio
The synthesis of imidazo[4,5-c]pyrazol-5-ones (6) is reported. 5-Amino-4-ethoxycarbonylaminopyrazoles 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).
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