Abstract
A series of 2-substituted-4-phenoxypyridine derivatives were designed, synthesized, and evaluated for their antiproliferative activity against 4 cancer cell lines (A549, HT-29, H460, and U87MG) in vitro. Most compounds showed moderate to excellent potency. Nine tyrosine kinases (c-Met, Flt-3, ALK, VEGFR-2, VEGFR-3, PDGFR-α, PDGFR-β, c-Kit, and EGFR) were used to evaluate the inhibitory activities with the most promising analogue 39, which showed the Flt-3/c-Met IC50 values of 2.18/2.61 nM. Structure-activity relationship studies indicated that n-Pr served as R1 group showed a higher preference, and stronger mono-EWGs on the phenyl ring (such as R2 = 4-F) was benefited to the potency.
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