Journal of heterocyclic chemistry

On the preparation of substituted 4H??1, 3, 4??thiadiazolo [2, 3??c]??1, 2, 4??triazin??4??ones and 1, 2, 4??triazolo [3, 4??b]??1, 3, 4??thiadiazoles

FT Coppo, MM Fawzi

Index: Coppo, Frank T.; Fawzi, Maged M. Journal of Heterocyclic Chemistry, 1997 , vol. 34, # 4 p. 1351 - 1354

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Citation Number: 9

Abstract

Abstract The reaction of benzoyl isothiocyanates and methoxycarbonyl isothiocyanate with 4- amino-4, 5-dihydro-3-(methylthio)-1, 2, 4-triazin-5-ones in acetonitrile gave several substituted 4H-1, 3, 4-thiadiazolo [2, 3-c]-1, 2, 4-triazin-4-ones VIa-h instead of the expected thioureas. In addition, benzoyl isothiocyanate reacted with 4-amino-3-(methylthio)-5- (trifluoromethyl)-4H-1, 2, 4-triazole to give the benzoyl thiourea IX and with 4-amino-3- ...