A novel series of 2-phenylquinoline-4-carboxamide derivatives was synthesized, characterized and evaluated for its antiproliferative activity against five cancer cell lines, Hela, SK-OV-3, HCT116, A549 and MDA-MB-468, and a normal human fetal lung fibroblastic cell line, MRC-5. Among them, compound 7b displayed potent cytotoxic activity in vitro against SK-OV-3 and HCT116 cell lines with IC₅₀ values of 0.5 and 0.2 μM, respectively. In general, the antiproliferative activity was correlated with the binding property of the colchicine binding site and inhibitory effect on tubulin polymerization. In addition, immunofluorescence and flow cytometry analysis revealed that selected compounds caused disruption of the mitotic spindle assembly and G₂/M phase arrest of the cell cycle, which correlated with proliferation inhibitory activity. Molecular docking analysis demonstrated the interaction of 7b at the colchicine binding site of tubulin. These results indicate these compounds are promising inhibitors of tubulin polymerization for the potent treatment of cancer.

合成，表征和评估了一系列新的2-苯基喹啉-4-羧酰胺衍生物对五种癌细胞系（Hela，SK-OV-3，HCT116，A549和MDA-MB-468）和正常人的抗增殖活性胎儿肺成纤维细胞系，MRC-5。其中，化合物7b在体外显示出对SK-OV-3和HCT116细胞系的有效细胞毒活性，IC ₅₀值分别为0.5和0.2μM。通常，抗增殖活性与秋水仙碱结合位点的结合特性和对微管蛋白聚合的抑制作用有关。此外，免疫荧光和流式细胞仪分析表明，选定的化合物导致有丝分裂纺锤体装配和G _2的破坏细胞周期的/ M期停滞，与增殖抑制活性有关。分子对接分析表明7b在微管蛋白的秋水仙碱结合位点相互作用。这些结果表明这些化合物是用于有效治疗癌症的微管蛋白聚合的有希望的抑制剂。