Syntheisis and biological evaluation of 2-phenol-4-chlorophenyl-6-aryl pyridines as topoisomerase II inhibitors and cytotoxic agents = Syntheisis and biological evaluation of 2-phenol-4-chlorophenyl-6-aryl pyridines as topoisomerase II inhibitors and cytotoxic agents

다국어 초록 (Multilingual Abstract)

A new series of 2-phenol-4-chlorophenyl-6-aryl pyridines were designed, synthesized, and evaluated for topoisomerase (topo) I and II inhibitory activities as well as cytotoxic activity against four different human cancer cell lines such as HCT15, T47D, DU145, and Hela. Most of the tested compounds exhibited stronger topo II inhibitory activity at 100 μM as compared to etoposide. All the compounds, except 39, did not show topo I inhibitory activity. Interestingly, compounds that showed better topo II inhibition than etoposide have ortho- or para-chlorophenyl at 4-position of central pyridine, and none of the com-pounds possess meta-chlorophenyl. SAR study revealed the importance of ortha- or para-chlorophenyl at 4-position of the central pyridine for selective tapa II inhibitory activity. Similarly, all compounds possessing mere- or para-hydroxyphenyl moieties shawed moderate to significant cytotoxic effects. Particularly, compounds 27-37, and 39 which showed excellent cytotoxicity (IC₅₀ = 0.68-1.25 μM) against T47D breast cancer cells suggest the importance of meta- or para-hydroxyphenyl moiety at 2-position of the central pyridine for the design of anticancer agents with related scaffolds.