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A novel series of benzimidazole-hydrazone derivatives was designed and synthesized as a potential anti-cancer agents. The structure of the target compounds was assured using different spectroscopic methods such as IR, 1 H NMR, 13 C NMR and elemental analysis. These new compounds were examined and evaluated for their antiproliferative activities against 60 different cell lines. Combination of benzimidazole scaffold with hydrazone group exhibited promising anti-cancer activity. Compounds 3a and 3b showed significant activity against different cancer cells lines between 50-84 % of growth inhibition. A molecular modeling study for compounds 3a and 3b into VEGFR-2 active site was performed with reasonable docking scores.

The combretastatins (cis-stilbenoid molecules) have received significant interest because of their simple chemical structures, excellent antiproliferative activity, and novel anti-tubulin molecular mechanism of action. Significant efforts have been carried out aiming at stabilizing the active cis-isomers. A new series of cis-vinylamide derivatives containing trimethoxyphenyl moiety were synthesized and characterized. Their anticancer activities were evaluated in vitro against MCF-7 breast cancer cell line. Compounds 2f, 3, and 5 displayed potent cytotoxic activity against the breast cancer cell line compared with CA-4 as the reference compound. The microtubule polymerization assay and flow cytometry analysis confirmed that the cytotoxic activity of compound 3 was related to inhibitory activity against tubulin polymerization. Compound 3 showed pro-apoptotic activity by inducting a significant increase in the percentage of pre-G1 phase in DNA flow cytometry compared to untreated control. The pro-apoptotic activity of compound 3 was inferred by a significant increase in the percentage of fluorescent annexin V/PI positive apoptotic cells. It also increased the level of caspase 3 compared to the untreated control.

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