Afatinib free base

• CAT Number: I001295
• CAS Number: 439081-18-2 (free base)
• Molecular Formula: C24H25ClFN5O3
• Molecular Weight: 485.94
• Purity: ≥95%
• Synonyms: BIBW-2992; BIBW 2992; BIBW2992. Afatinib free base; trade name: Gilotrif, Tomtovok and Tovok.
• Target: RTK inhibitor
• Solubility: Soluble in DMSO, not in water
• Storage: 0 - 4°Cfor short term (days to weeks), or -20 °C for long term (months).
• InChI: InChI=1S/C24H25ClFN5O3/c1-31(2)8-3-4-23(32)30-21-11-17-20(12-22(21)34-16-7-9-33-13-16)27-14-28-24(17)29-15-5-6-19(26)18(25)10-15/h3-6,10-12,14,16H,7-9,13H2,1-2H3,(H,30,32)(H,27,28,29)/b4-3+/t16-/m0/s1
• InChIKey: ULXXDDBFHOBEHA-CWDCEQMOSA-N
• SMILES: O=C(NC1=CC2=C(NC3=CC=C(F)C(Cl)=C3)N=CN=C2C=C1O[C@@H]4COCC4)/C=C/CN(C)C

Afatinib, also know as BIBW 2992, is an orally bioavailable dual receptor tyrosine kinase (RTK) inhibitor with potential antineoplastic activity. EGFR/HER2 tyrosine kinase inhibitor BIBW 2992 irreversibly binds to and inhibits human epidermal growth factor receptors 1 and 2 (EGFR-1; HER2), which may result in the inhibition of tumor growth and angiogenesis. EGFR/HER2 are RTKs that belong to the EGFR superfamily; both play major roles in tumor cell proliferation and tumor vascularization and are overexpressed in many cancer cell types. Afatinib is approved in much of the world (including the United States, Canada, the United Kingdom and Australia) for the treatment of metastatic non-small cell lung carcinoma (NSCLC), developed by Boehringer Ingelheim. It acts as an angiokinase inhibitor.

Reference

 1: Belani CP. The role of irreversible EGFR inhibitors in the treatment of non-small cell lung cancer: overcoming resistance to reversible EGFR inhibitors. Cancer Invest. 2010 May;28(4):413-23. Review. PubMed PMID: 20307200.2: Tomillero A, Moral MA. Gateways to clinical trials. Methods Find Exp Clin Pharmacol. 2009 Dec;31(10):661-700. PubMed PMID: 20140276.3: Gazdar AF. Epidermal growth factor receptor inhibition in lung cancer: the evolving role of individualized therapy. Cancer Metastasis Rev. 2010 Mar;29(1):37-48. Review. PubMed PMID: 20127143.4: Sos ML, Rode HB, Heynck S, Peifer M, Fischer F, Klüter S, Pawar VG, Reuter C, Heuckmann JM, Weiss J, Ruddigkeit L, Rabiller M, Koker M, Simard JR, Getlik M, Yuza Y, Chen TH, Greulich H, Thomas RK, Rauh D. Chemogenomic profiling provides insights into the limited activity of irreversible EGFR Inhibitors in tumor cells expressing the T790M EGFR resistance mutation. Cancer Res. 2010 Feb 1;70(3):868-74. Epub 2010 Jan 26. PubMed PMID: 20103621.5: Doebele RC, Oton AB, Peled N, Camidge DR, Bunn PA Jr. New strategies to overcome limitations of reversible EGFR tyrosine kinase inhibitor therapy in non-small cell lung cancer. Lung Cancer. 2010 Jan 19. [Epub ahead of print] PubMed PMID: 20092908.6: Regales L, Gong Y, Shen R, de Stanchina E, Vivanco I, Goel A, Koutcher JA, Spassova M, Ouerfelli O, Mellinghoff IK, Zakowski MF, Politi KA, Pao W. Dual targeting of EGFR can overcome a major drug resistance mutation in mouse models of EGFR mutant lung cancer. J Clin Invest. 2009 Oct;119(10):3000-10. doi: 10.1172/JCI38746. Epub 2009 Sep 14. PubMed PMID: 19759520; PubMed Central PMCID: PMC2752070.7: Ocaña A, Amir E. Irreversible pan-ErbB tyrosine kinase inhibitors and breast cancer: current status and future directions. Cancer Treat Rev. 2009 Dec;35(8):685-91. Epub 2009 Sep 4. Review. PubMed PMID: 19733440.8: Nguyen KS, Kobayashi S, Costa DB. Acquired resistance to epidermal growth factor receptor tyrosine kinase inhibitors in non-small-cell lung cancers dependent on the epidermal growth factor receptor pathway. Clin Lung Cancer. 2009 Jul;10(4):281-9. Review. PubMed PMID: 19632948; PubMed Central PMCID: PMC2758558.9: Perera SA, Li D, Shimamura T, Raso MG, Ji H, Chen L, Borgman CL, Zaghlul S, Brandstetter KA, Kubo S, Takahashi M, Chirieac LR, Padera RF, Bronson RT, Shapiro GI, Greulich H, Meyerson M, Guertler U, Chesa PG, Solca F, Wistuba II, Wong KK. HER2YVMA drives rapid development of adenosquamous lung tumors in mice that are sensitive to BIBW2992 and rapamycin combination therapy. Proc Natl Acad Sci U S A. 2009 Jan 13;106(2):474-9. Epub 2009 Jan 2. PubMed PMID: 19122144; PubMed Central PMCID: PMC2626727.10: Minkovsky N, Berezov A. BIBW-2992, a dual receptor tyrosine kinase inhibitor for the treatment of solid tumors. Curr Opin Investig Drugs. 2008 Dec;9(12):1336-46. Review. PubMed PMID: 19037840.