Synthesis of bioactive heterocyclic compounds having effective biological activity is an essential research area for wide-ranging applications. In this study, a conventional methodology has been developed for the synthesis of a series of new 3-mercapto-1,2,4-triazole derivatives 4a-f. The purity and structure of the synthesized molecules were confirmed by 1H NMR, 13C NMR and elemental analysis. In addition, the prepared compounds were screened for their anti-proliferative activity against three human cancer cell lines including A549 (lung cancer), MCF7 (breast cancer) and SKOV3 (ovarian cancer) using MTT reduction assay. All the tested compounds demonstrated remarkable cytotoxic activity with IC50 values ranging from 3.02 to 15.37 µM. The heterocyclic compound bearing 3,4,5-trimethoxy moiety was found to be the most effective among the series displaying an IC50 of 3.02 µM specifically against the ovarian carcinoma cancer cell line (SKOV3). Moreover, Annexin V-FITC/propidium iodide staining assay indicated that this compound can induce apoptosis in SKOV3 cells. Furthermore, cell cycle assay showed a significant cell cycle arrest at the G2/M phase in a dose-dependent manner for this compound. The molecular docking results was showed binding modes of potent compound 4d perfectly corroborated the suggestion of binding to the colchicine site. The entire results conclude that 3-mercapto-1,2,4-triazole derivatives can be synthesized by a green method for biological and pharmacological applications. New analogs of 3-mercapto-1,2,4-triazole potential derivatives for anti-proliferative activity were synthesized. Cytotoxic activity of all synthesized compounds was evaluated against tree human cancer cell lines: lung (A549), breast (MCF7) and ovarian (SKOV3).

中文翻译：

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新型 3-巯基-1,2,4-三唑衍生物的分子对接研究、生物学评价和合成。

具有有效生物活性的生物活性杂环化合物的合成是广泛应用的重要研究领域。在这项研究中，开发了一种常规方法来合成一系列新的 3-巯基-1,2,4-三唑衍生物 4a-f。合成分子的纯度和结构经1H NMR、13C NMR和元素分析证实。此外，使用 MTT 还原试验筛选了制备的化合物对三种人类癌细胞系包括 A549（肺癌）、MCF7（乳腺癌）和 SKOV3（卵巢癌）的抗增殖活性。所有测试的化合物都表现出显着的细胞毒活性，IC50 值范围为 3.02 至 15.37 µM。含3,4的杂环化合物，发现 5-三甲氧基部分是该系列中最有效的，其 IC50 为 3.02 µM，专门针对卵巢癌细胞系 (SKOV3)。此外，Annexin V-FITC/碘化丙啶染色试验表明该化合物可以诱导SKOV3细胞凋亡。此外，细胞周期测定显示该化合物在 G2/M 期以剂量依赖性方式显着细胞周期停滞。分子对接结果表明，有效化合物 4d 的结合模式完美地证实了与秋水仙碱位点结合的建议。整个结果得出结论，3-mercapto-1,2,4-triazole 衍生物可以通过绿色方法合成，用于生物学和药理学应用。合成了具有抗增殖活性的 3-mercapto-1,2,4-triazole 潜在衍生物的新类似物。