A simple single-step methodology was developed to synthesize 3,7-dialkyltetrahydro-1 H ,5 H -[1,2,4]triazolo[1,2-a][1,2,4]triazole-1,5-dithiones in improved yields by acid-catalyzed reaction of thiosemicarbazide and aliphatic aldehydes in anhydrous ethanol at reflux temperature. The products were obtained in good to excellent yields. A plausible mechanism involving two successive intramolecular heterocyclizations
开发了一种简单的单步方法来合成 3,7-二烷基四氢-1 H ,5 H -[1,2,4] 三唑并[1,2-a][1,2,4]三唑-1,5-通过在回流温度下,氨基硫脲和脂肪醛在无水乙醇中的酸催化反应,可以提高二硫酮的收率。以良好至极好的收率获得产物。还提出了一种可能的机制,涉及两个连续的氨基硫脲分子内杂环化。合成的化合物通过光谱方法进行表征,并通过 X 射线晶体学证实。这些 C-2 对称六杂原子稠合杂环有望具有特殊的应用。
Cyclization of thiosemicarbazide derivative: As a source of novel synthesis of some azoles and azines
作者:Mohamed H. M. Abd El‐Azim、Mohamed G. Assy、Mohammed I. Khalil、Yasser A. Selim
DOI:10.1002/jhet.4022
日期:2020.8
In our study, we aimed to synthesize novel, some biologically active compounds, Azoles and Azines derivatives, that to be nitrogen‐containing heterocycles, and have their diverse therapeutic values. Thiosemicarbazide, 2 , was obtained from the attack of nitrogen of hydrazine to the carbon of heteroallene function of compound 1. Triazolotriazole derivative, 4 , was obtained from the reaction of 2 with