Microtubule targeting agents (MTAs) are the potential drug candidates for anticancer drug discovery. Disrupting the microtubule formation or inhibiting the de-polymerization process by a synthetic molecule can lead to an excellent anticancer drug candidate. Here, we present the 2,5-substituted-1H-benzo[d]imidazole derivatives as potential colchicine, nocodazole binding site targeting agents. About 20 benzimidazole derivatives were synthesized with 82.0%-94.0% yield using mild reaction conditions. The synthesized compounds showed moderate to excellent anticancer activity established in three cell lines, including Hela cells, A549 cells, MRC-5 cells. The compounds B15, B16, B19, and B20 are the potential candidates with the IC values <15 μM in the three different cell lines. In MTT assay, compounds B15, B16, B19, and B20 showed excellent antiproliferation activity indicated by IC values in the range of 5.3 ± 0.21 to 18.1 ± 0.32 μM using HeLa and A549 cell lines. The predicted absorption, distribution, metabolism and excretion (ADME) properties and drug-likeness properties of B15, B16, B19, and B20 indicate that these compounds can be used as lead compounds for further study to develop excellent MTAs.

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