Discovery and optimization of novel pyrazole-benzimidazole CPL304110, as a potent and selective inhibitor of fibroblast growth factor receptors FGFR (1-3).
Yamani A, Zdżalik-Bielecka D, Lipner J, Stańczak A, Piórkowska N, Stańczak PS, Olejkowska P, Hucz-Kalitowska J, Magdycz M, Dzwonek K, Dubiel K, Lamparska-Przybysz M, Popiel D, Pieczykolan J, Wieczorek M.
The FGFR family is characterized by four receptors (FGFR 1-4), binding to 18 ligands called fibroblast growth factors (FGFs). Aberrant activation of FGFs and their FGFRs has been implicated in a broad spectrum of human tumors. We employed the scaffolds hybridization approach, scaffold-hopping concept to synthesize a series of novel pyrazole-benzimidazole derivatives 56 (a-x). Compound 56q (CPL304110) was identified as a selective and potent pan-FGFR inhibitor for FGFR1, -2, -3 with IC<sub>50</sub>s of 0.75 nM, 0.50 nM, 3.05 nM respectively, whereas IC<sub>50</sub> of 87.90 nM for FGFR4. Due to its favorable pharmacokinetic profile, low toxicity and potent anti-tumor activity in vivo, compound 56q is currently under evaluation in phase I clinical trial for the treatment of bladder, gastric and squamous cell lung cancers (01FGFR2018; NCT04149691).