1-Arylaminoimidazole-2-thiones as intermediates in the synthesis of imidazo[2,1-b][1,3,4]thiadiazines
作者:Constantinos Neochoritis、Constantinos A. Tsoleridis、Julia Stephanidou-Stephanatou
DOI:10.1016/j.tet.2008.01.136
日期:2008.4
The synthesis of the hitherto unknown imidazo[2,1-b][1,3,4]thiadiazines 7 in good to very good yields (up to 77%) by using suitable imidazole-2-thione precursors 1 has been described, while S-vinylimidazoles 8 and 9 were isolated as by-products. Moreover, the reactivity of the three possible reaction sites of the starting thiones 1 was initially examined by methylation experiments, whereupon the enhanced
已经描述了通过使用合适的咪唑-2-硫酮前体1合成迄今未知的咪唑并[2,1- b ] [1,3,4]噻二嗪7的收率非常好(高达77%)。分离出S-乙烯基咪唑8和9作为副产物。此外,最初通过甲基化实验检查了起始硫酮1的三个可能反应位点的反应性,随后通过分离甲基化衍生物3和4证明了硫的反应性增强。通过长时间的甲基化,咪唑啉酮6终于形成了。理论计算支持了烷基化产物的实验结果。