A new series of derivatives characterized by the presence of the 3,4,5-trimethoxylbenzamide substituted benzofurans were synthesized and evaluated for antiproliferative activity against four cancer cell lines and one normal human cell line. Among them, derivative 6g with greatest cytotoxicity significantly inhibited the growth of MDA-MB-231, HCT-116, HT-29 and HeLa cell lines with IC₅₀ values of 3.01, 5.20, 9.13, and 11.09 μM, respectively. Importantly, 6g possessed excellent selectivity over non-tumoral cell lines HEK-293 (IC₅₀ > 30 μM). Moreover, mechanistic studies revealed that 6g induced HeLa cells arrested in G2/M phase in a concentration-dependent manner, and inhibited polymerization of tubulin via a consistent way with CA-4. In general, these observations suggest that 6g is a promising anti-cancer lead and is worth further investigation to generate potential antitumor agents.

合成了以3,4,5-三甲氧基苯甲酰胺取代的苯并呋喃为特征的一系列新衍生物，并评估了其对四种癌细胞系和一种正常人细胞系的抗增殖活性。其中，具有最大细胞毒性的衍生物6g显着抑制MDA-MB-231，HCT-116，HT-29和HeLa细胞系的生长，IC ₅₀值分别为3.01、5.20、9.13和11.09μM。重要的是，6g对非肿瘤细胞系HEK-293具有优异的选择性（IC ₅₀  > 30μM）。而且，机理研究表明6g诱导的HeLa细胞以浓度依赖的方式停滞在G2 / M期，并通过与CA-4一致的方式抑制微管蛋白的聚合。通常，这些观察结果表明6g是有前途的抗癌药物，值得进一步研究以产生潜在的抗肿瘤药。