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Paper | Regular issue | Vol 41, No. 3, 1995, pp.497-506
Published online, 1st January, 1970
DOI: 10.3987/COM-94-6967
Synthesis of 6-Substituted Imidazo[4,5-c]pyrazole-5-thiones

Chiara B. Vicentini, Valeria Ferretti, Augusto C. Veronese, Mario Guarneri, Maurizio Manfrini, and Paolo Giori*

*Dipartimento di Scienze Farmaceutiche, Università di Ferrara, 44100, Ferrara, Italy

Abstract

Treatment of diaminopyrazole derivatives (2) wityh thiophosgene afforded selectively the isothiocyanatopyrazoles (3). Heating of 3 in pyridine gave the imidazo[4,5-c]pyrazole-5-thiones (4).