BTK inhibitor 17

• CAT Number: I035318
• CAS Number: 1858206-76-4
• Molecular Formula: C25H24N6O3
• Molecular Weight: 456.50
• Purity: ≥95%
• Synonyms: 4-amino-3-(4-phenoxyphenyl)-1-[(3R)-1-prop-2-enoylpiperidin-3-yl]-6H-pyrazolo[3,4-d]pyridazin-7-one
• InChI: InChI=1S/C25H24N6O3/c1-2-20(32)30-14-6-7-17(15-30)31-23-21(24(26)27-28-25(23)33)22(29-31)16-10-12-19(13-11-16)34-18-8-4-3-5-9-18/h2-5,8-13,17H,1,6-7,14-15H2,(H2,26,27)(H,28,33)/t17-/m1/s1
• InChIKey: QUYXPVXTKPTPCA-QGZVFWFLSA-N
• SMILES: C=CC(=O)N1CCCC(C1)N2C3=C(C(=N2)C4=CC=C(C=C4)OC5=CC=CC=C5)C(=NNC3=O)N

BTK inhibitor 17 is a potent and orally active irreversible BTK inhibitor with an IC50 of 2.1 nM. BTK inhibitor 17 can be used for rheumatoid arthritis research[1].
BTK inhibitor 17 (compound 8) could covalently bind to Cys481 and formed an HB network with hinge key residues Met477, Glu475, and gatekeeper Thr474[1].
BTK inhibitor 17 (compound 8; 3-10 mg/kg; oral gavage; daily; for 28 days) treatment inhibits the significant progression of the disease and exhibits a clear dose-dependent reduction per paw clinical scores, and no significant body weight loss is observed for all different dosages[1].
BTK inhibitor 17 (compound 8) shows >95% plasma protein binding across three species of human, rat, and mouse. After an intravenous injection, the half-life (rat, 0.32 h; mice, 0.42 h), clearance (rat, 54.6 mL/min/kg; mice, 31.3 mL/min/kg), volume of distribution (rat, 1.55 L/kg; mice, 0.82 L/kg), and AUC exposure (rat, 604 ng.h/mL; mice, 576 ng.h/mL) are observed in two species. After oral administration, BTK inhibitor 17 exhibits higher Cmax (rat, 466 ng/mL; mice, 252 ng/mL) and plasma exposure (rat, 642 ng.h/mL; mice, 128 ng.h/mL) with a favorable oral bioavailability (rat, 23.7%; mice, 11.2%)[1].

Reference

[1]. Xuejun Zhang, et al. Discovery and Evaluation of Pyrazolo[3,4- d]pyridazinone as a Potent and Orally Active Irreversible BTK Inhibitor. ACS Med Chem Lett. 2019 Dec 11;11(10):1863-1868.
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