Synthesis of novel 1,2,4-triazoles and triazolo-thiadiazines as anticancer agents
作者:Thoraya Abd El-Reheem FARGHALY、Magda Ahmad ABDALLAH、Huda Kamel MAHMOUD
DOI:10.3906/kim-1504-13
日期:——
A new series of 7-arylazo-5$H$-3-(trifluoromethyl)-6-methyl-1,2,4-triazolo-[3,4-$b$]-1,3,4-thiadiazines was prepared by reaction of 4-amino-3-trifluoromethyl-5-mercapto-1,2,4-triazoles with $N$-aryl-2-oxo-propane hydrazonoyl chloride in dioxane under reflux in the presence of triethylamine. Furthermore, Schiff bases of 4-amino-5-mercapto-1,2,4-triazole derivatives were reacted with a variety of hydrazonoyl chlorides and gave the respective hydrazonothioates. In addition, the novel \textitbis}-(1,2,4-triazole-3-thione) was reacted with the appropriate hydrazonoyl chloride in dioxane under reflux in the presence of triethylamine to give the corresponding \textitbis}-(1,2,4-triazolethiohydrazonoate). The structures of the new compounds were established based on elemental and spectral data. The mechanism of the studied reaction was also discussed. Moreover, some of the new products were screened for their anticancer activity and the results obtained are promising and indicate that compounds \textbf4a }and \textbf4i} are the most active inhibitors against HEPG-2 and compounds \textbf4a} and \textbf13b} are active against HCT cell lines.
一系列新的7-芳基偶氮-5$H$-3-(三氟甲基)-6-甲基-1,2,4-噻二唑-[3,4-$b$]-1,3,4-噻二唑被合成,反应物为4-氨基-3-三氟甲基-5-巯基-1,2,4-噻二唑与$N$-芳基-2-氧基丙烷氮酰氯,在有三乙胺存在的二噁烷中加热回流。此外,4-氨基-5-巯基-1,2,4-噻二唑衍生物的席夫碱与多种氮酰氯反应,生成相应的氮酰硫酸酯。此外,新型的\textitbis}-(1,2,4-噻二唑-3-硫酮)与适当的氮酰氯在有三乙胺存在的二噁烷中加热回流反应,生成相应的\textitbis}-(1,2,4-噻二唑硫氮酰盐)。新化合物的结构是基于元素分析和光谱数据确立的。还讨论了所研究反应的机制。此外,其中一些新产品进行了抗癌活性筛选,结果显示令人鼓舞,表明化合物\textbf4a}和\textbf4i}对HEPG-2细胞的抑制活性最强,而化合物\textbf4a}和\textbf13b}对HCT细胞系也具有活性。