Abstract 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)-l, 2, 4-triazole-3-thiones 4a-f and 5-methyl-4-(pyrazol-5-yl)-1, 2, 4-triazole-3- thiones 4g-I respectively.
