The regioselective synthesis of 2-(methylthio)-N-aryl/alkylthiazole-5-carboxamides and ethyl-5-(aryl/alkyl carbamoyl)thiazole-4-carboxylates was carried out via the base-induced cyclization of methyl-2-oxo-2-(amino)ethanedithioates with TosMIC and ethyl isocyanoacetate, respectively, with high yields. The regioisomeric products were confirmed based on X-ray diffraction studies. An advantage of the
2-(甲
硫基) -N-芳基/烷基
噻唑-5-甲酰胺和5-(芳基/烷基
氨基甲酰基)
噻唑-4-羧酸乙酯的区域选择性合成是通过甲基-2-氧代的碱诱导环化进行的-2-(
氨基)二
硫代
乙烷与 TosMIC 和
异氰基乙酸乙酯分别具有高产率。基于 X 射线衍射研究证实了区域异构产物。与早期的协议相比,本方法的一个优点是范围广泛的异
氰化物反应性,而无催化剂性质和快速反应时间是值得注意的特征。