Synthesis of 4-(pyrazol-5-yl)-1,2,4-triazole-3-thiones |
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Authors: | Chiara B Vicentini Maurizio Manfrini Augusto C Veronese Mario Guarneri |
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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. |
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