A study of the behaviour of 2,4-substituted thiosemicarbazides toward orthoesters: Formation of mesoionic compounds
作者:Francesco Buccheri、Giuseppe Cusmano、Michelangelo Gruttadauria、Renato Noto、Giuseppe Werber
DOI:10.1002/jhet.5570340512
日期:1997.9
led to the formation of the 1,2,4-triazoline-5-thione ring and to the 1,2,4-triazolium-5-thiolate ring. The formation of the mesoionic componds is due to rearrangement of the easily available 2,4-disubstituted thiosemicarbazides to 1,4-disubstituted thiosemicarbazides under the reaction conditions adopted. This method can be usefully used for the synthesis of mesoionic compounds, especially in the case
在回流的二甲苯中,2,4-二取代的硫代氨基脲和原酸酯的反应导致形成1,2,4-三唑啉-5-硫酮环和1,2,4-三唑鎓-5-硫醇盐环。中离子化合物的形成是由于在所采用的反应条件下容易获得的2,4-二取代的硫代氨基脲重排成1,4-二取代的硫代氨基脲。该方法可有效地用于介孔化合物的合成,特别是在2-甲基-4-苯基硫代氨基脲的情况下。