Journal of Heterocyclic Chemistry p. 29 - 32 (1998)
Update date:2022-08-04
Topics:
Vicentini, Chiara B.
Manfrini, Maurizio
Veronese, Augusto C.
Guarneri, Mario
Condensation of pyrazolyl isothiocyanates 2 with N-substituted hydrazines provided the 2-methyl/phenyl-4-(pyrazol-5-yl)thiosemicarbazides 3. Cyclization of 3 with formic acid-acetic anhydride or with triethyl orthoacetate-acetic anhydride provided 4-(pyrazol-5-yl)-1,2,4-triazole-3- thiones 4a-f and 5-methyl-4-(pyrazol-5-yl)-1,2,4-triazole-3-thiones 4g-l respectively.
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