Abstract
We have designed, synthesized, and evaluated as potential antitumor agents a series of 2-hydroxybenzylidene derivatives of the N-(2-trifluoromethylpiridyn-4-yl)anthranilic acid hydrazide, and some analogues bearing a (2-trifluoromethyl)piridyn-4-ylamino group in 3- or 4-position of benzohydrazide or 4-position of phenylacetohydrazide. Compounds 12e, 13e, 15e, and 16e, bearing a 4-(diethylamino)salicylidene group exhibited potent cytotoxicity, with averaged GI50 values in sub-micromolar range, and a variety of cell selectivity at nanomolar concentrations. The determination of acute toxicity in athymic nudes mice proved some compounds to be non-toxic, making them good candidates for further study as antitumor agents.
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