Abstract
Herein, we report the identification, structural optimization, and biological efficacy of thieno[2,3-b]pyridines as potent inhibitors of splice variants of the tyrosine kinase recepteur d'origine nantais (RON). Among synthesized compounds, compound 15f exhibited excellent in vitro kinase inhibition and antiproliferative activity, as well as in vivo antineoplastic efficacy against RON splice variant-expressing tumors. Moreover, compound 15f with excellent pharmacokinetics demonstrated significant activity with greater tumor growth inhibition (74.9% at 10 mg/kg) than compounds 2 and 4 in a patient-derived xenograft model. Collectively, 15f represents a promising, novel anticancer agent targeting RON splice variants.
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