Synthesis and Antitumor Evaluation of Nitrovinyl Biphenyls: Anticancer Agents Based on Allocolchicines

Abstract

A new class of nitrovinyl biphenyl compounds based on the structures of colchicines and allocolchicines were designed, synthesized, and shown to inhibit tubulin polymerization and cause mitotic arrest. A majority of these compounds were found to possess potent anticancer properties, with IC₅₀ values in the range of 0.05–7 μM, and are equally potent with colchicine in HeLa and MCF-7 cells. Compounds 14 e and 14 f inhibited tubulin assembly by more than 60 %, and flow cytometry studies indicated growth arrest of cells in the G₂/M phase of the cell cycle in a concentration-dependent manner. Treatment of cells with 14 f resulted in upregulation of cyclin B1 and aurora kinase B mRNA levels, corresponding to growth arrest in the G₂/M phase of the cell cycle as the mode of action.