Electrophilic heterocyclization of 4,5-disubstituted 3-allylthio-4H-1,2,4-triazoles by the action of halogens
作者:R. M. Usenko、M. V. Slivka、V. G. Lendel
DOI:10.1007/s10593-011-0870-5
日期:2011.11
A study was carried out on the regioselectivity of the electrophilic heterocyclization of 4,5-disubstituted 3-allylthio-4H-1,2,4-triazoles by the action of bromine and iodine. Factors affecting the halogenation regioselectivity, namely, the nature of the electrophilic reagent and the presence of lithium perchlorate, were studied. A method was developed to obtain 5,6-dihydro-3H-[1,3]thiazolo[3,2-b]triazolium
通过溴和碘的作用,对4,5-二取代的3-烯丙基硫基-4 H -1,2,4-三唑的亲电子杂环化的区域选择性进行了研究。研究了影响卤化区域选择性的因素,即亲电试剂的性质和高氯酸锂的存在。开发了一种获得5,6-二氢-3 H- [1,3]噻唑并[3,2-b]三唑鎓盐的方法。这些盐的结构通过光谱方法和化学转化得到证实。