作者:Chiara B. Vicentini、Maurizio Manfrini、Augusto C. Veronese、Mario Guarneri
DOI:10.1002/jhet.5570350106
日期:1998.1
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.
吡唑基异硫氰酸酯2与N-取代的肼缩合得到2-甲基/苯基-4-(吡唑-5-基)硫代氨基脲3。用甲酸-乙酸酐或原乙酸三乙酯-乙酸酐对3进行环化,得到4-(吡唑-5-基)-1,2,4-三唑-3-硫酮4a-f和5-甲基-4-(吡唑) -5-基)-1,1,2,4-三唑-3-硫酮4g-1。