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J Med Chem. 2017 Jul 13;60(13):5521-5542. doi: 10.1021/acs.jmedchem.7b00231. Epub 2017 Jun 14.

Discovery of Clinical Candidate 1-{[(2S,3S,4S)-3-Ethyl-4-fluoro-5-oxopyrrolidin-2-yl]methoxy}-7-methoxyisoquinoline-6-carboxamide (PF-06650833), a Potent, Selective Inhibitor of Interleukin-1 Receptor Associated Kinase 4 (IRAK4), by Fragment-Based Drug Design.

Author information

1
Worldwide Medicinal Chemistry, Pfizer Inc. , 1070 Science Center Drive, San Diego, California 92121, United States.

Abstract

Through fragment-based drug design focused on engaging the active site of IRAK4 and leveraging three-dimensional topology in a ligand-efficient manner, a micromolar hit identified from a screen of a Pfizer fragment library was optimized to afford IRAK4 inhibitors with nanomolar potency in cellular assays. The medicinal chemistry effort featured the judicious placement of lipophilicity, informed by co-crystal structures with IRAK4 and optimization of ADME properties to deliver clinical candidate PF-06650833 (compound 40). This compound displays a 5-unit increase in lipophilic efficiency from the fragment hit, excellent kinase selectivity, and pharmacokinetic properties suitable for oral administration.

PMID:
28498658
DOI:
10.1021/acs.jmedchem.7b00231
[Indexed for MEDLINE]

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