Abstract
AbstractNovel indole amide derivatives C1‐C10 were successfully synthesized and characterized by 1H NMR, 13C NMR, IR, MS, and elemental analysis, and their molecular formulas were C14H10N6O, C13H10N4O, C16H13N3O2, C19H14N2O2, C16H11N3OS, C15H13N3O, C12H9N5O, C16H10ClN3OS, C15H17N3O2, and C13H14N2O3, respectively. The primary biological activities of these compounds were evaluated in vitro by the DPPH assay, H2O2‐induced oxidative stress injury assay, and cytotoxicity assay. The results indicated that compounds C1, C2, C4, C7, and C9 exhibited DPPH·scavenging ability, while C3, C4, C5, and C8 showed potent growth‐inhibitory activities against various human tumor cells, including MDA‐MB‐231, Hela, A549, and HT29. Interestingly, compound C4 showed potent scavenging effects on the DPPH radical and possessed protective effect on H2O2‐induced oxidative stress injury in human neuroblastoma SH‐SY5Y cells at low concentrations; however, C4 exhibited significant toxicity against four human tumor cells at a higher concentration in all treatments, and the range of IC50 value was 7.91 to 13.35 μM.
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