Intramolecular cyclization of 4-amino-3-alkylsulfanyl-1,2,4-triazoles as a method for annelation of thiadiazine and thiadiazole rings
作者:A. A. Kolodina、A. V. Lesin
DOI:10.1134/s1070428009010199
日期:2009.1
4-triazolo[3,4-b][1,3,4]thiadiazines spiro-fused to 2-oxo-2,3-dihydro-1H-indole fragment at C3. Analogous cyclization of 2,6-di-tert-butyl-4-[5-hetaryl-3-(2-aryl-2-oxoethylsulfanyl)-4H-1,2,4-triazole-4-ylimino]cyclohexa-2,5-dienones involved the imino nitrogen atom to produce the corresponding 6-aroyl-5-(3,5-di-tert-butyl-4-hydroxyphenyl)-3-hetaryl-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazoles.
4-氨基-5-(吡啶-4-基)-4 H -1,2,4-三唑-3-硫醇与N-取代的靛红反应生成2-oxo-3- [5-(吡啶-4-式)的3-硫烷基-4 H -1,2,4-三唑-4-嘧啶] -2,3-二氢-1 H-吲哚经苯甲酰溴处理后得到相应的S-苯甲酰基衍生物。后者经历了碱催化的分子内环化反应,形成了与2-氧代-氧杂稠合的6,7-dihydro-5 H -1,2,4-triazolo [3,4- b ] [1,3,4]噻二嗪。在C 3的2,3-二氢-1 H-吲哚片段。2,6-二叔丁基-4- [5-杂芳基-3-(2-芳基-2-氧代乙基硫烷基)-4 H的类似环化-1,2,4-三唑-4-ylimino]环六-2,5-二酮涉及亚氨基氮原子以产生相应的6-芳酰基-5-(3,5-二叔丁基-4-羟基苯基) -3-杂芳基-[1,2,4]三唑[3,4- b ] [1,3,4]噻二唑。