Structure-based discovery of cellular-active allosteric inhibitors of FAK.Tomita, N., Hayashi, Y., Suzuki, S., Oomori, Y., Aramaki, Y., Matsushita, Y., Iwatani, M., Iwata, H., Okabe, A., Awazu, Y., Isono, O., Skene, R.J., Hosfield, D.J., Miki, H., Kawamoto, T., Hori, A., Baba, A.
(2013) Bioorg Med Chem Lett 23: 1779-1785
- PubMed: 23414845
- DOI: https://doi.org/10.1016/j.bmcl.2013.01.047
- Primary Citation of Related Structures:
- PubMed Abstract:
In order to develop potent and selective focal adhesion kinase (FAK) inhibitors, synthetic studies on pyrazolo[4,3-c][2,1]benzothiazines targeted for the FAK allosteric site were carried out. Based on the X-ray structural analysis of the co-crystal of the lead compound, 8-(4-ethylphenyl)-5-methyl-1,5-dihydropyrazolo[4,3-c][2,1]benzothiazine 4,4-dioxide 1 with FAK, we designed and prepared 1,5-dimethyl-1,5-dihydropyrazolo[4,3-c][2,1]benzothiazin derivatives which selectively inhibited kinase activity of FAK without affecting seven other kinases. The optimized compound, N-(4-tert-butylbenzyl)-1,5-dimethyl-1,5-dihydropyrazolo[4,3-c][2,1]benzothiazin-8-amine 4,4-dioxide 30 possessed significant FAK kinase inhibitory activities both in cell-free (IC50=0.64μM) and in cellular assays (IC50=7.1μM). These results clearly demonstrated a potential of FAK allosteric inhibitors as antitumor agents.
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