A series of new 3-(indol-3-yl)-4-(pyrazolo[3,4-c]pyridazin-3-yl)-maleimides were synthesized and evaluated for their inhibitory activity against IDH1-R132H. Most compounds exhibited significant potency to IDH1-R132H inhibition. Among these, 3-(1-(3-(1H-imidazol-1-yl)propyl)-6-bromo-1H-indol-3-yl)-4-(1-methyl-1H-pyrazolo[3,4-c]pyridazin-3-yl)-1H-pyrrole-2,5-dione (compound IXb), was the most promising IDH1-R132H inhibitor (IC50 = 0.031 μM) and could significantly inhibit the production of 2-HG in U87MG IDH1-R132H cells. Preliminary structure–activity relationships and molecular modeling studies are discussed based on the experimental data obtained.
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Acknowledgments
We gratefully acknowledge the Natural Science Foundation of Zhejiang (LY18H300009), the Postdoctoral Science Foundation of China (2014M550256), the State Key Laboratory of Drug Research (SIMM1601KF-04), National Natural Science Foundation of China (8150131067), “Personalized Medicines-Molecular Signature-based Drug Discovery and Development,” Strategic Priority Research Program of the Chinese Academy of Sciences (XDA12020328).
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Xu, J., Hu, Y., Liu, X. et al. Synthesis and Evaluation of 3-(Indol-3-yl)-4-(Pyrazolo[3,4-c]Pyridazin-3-yl)-Maleimides as Potent Mutant Isocitrate Dehydrogenase-1 Inhibitors. Pharm Chem J 55, 655–664 (2021). https://doi.org/10.1007/s11094-021-02475-0
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DOI: https://doi.org/10.1007/s11094-021-02475-0