A NEW EFFICIENT ROUTE TO IMIDAZO[4,5-C]PYRAZOL-5-ONES

Authors
VICENTINI CB VERONESE AC MANFRINI M
Citation
Cb. Vicentini et al., A NEW EFFICIENT ROUTE TO IMIDAZO[4,5-C]PYRAZOL-5-ONES, Journal of heterocyclic chemistry, 34(2), 1997, pp. 629-632
Citations number
20
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Journal of heterocyclic chemistry → ACNP
ISSN journal
0022152X
Volume
34
Issue
2
Year of publication
1997
Pages
629 - 632
Database
ISI
SICI code
0022-152X(1997)34:2<629:ANERTI>2.0.ZU;2-T
Abstract
The synthesis of imidazo[4,5-c]pyrazol-5-ones (6) is reported. 5-Amino -4-ethoxycarbonylaminopyrazoles 3a-g when heated at 200 degrees 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).