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Siu T, Kumarasinghe SE, Altman MD, Katcher M, Northrup A, White C, Rosenstein C, Mathur A, Xu L, Chan G, Bachman E, Bouthillette M, Dinsmore CJ, Marshall CG, Young JR. The discovery of reverse tricyclic pyridone JAK2 inhibitors. Part 2: lead optimization. Bioorg Med Chem Lett 2014; 24:1466-71. [PMID: 24582987 DOI: 10.1016/j.bmcl.2014.02.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Revised: 01/31/2014] [Accepted: 02/04/2014] [Indexed: 11/27/2022]
Abstract
This communication discusses the discovery of novel reverse tricyclic pyridones as inhibitors of Janus kinase 2 (JAK2). By using a kinase cross screening approach coupled with molecular modeling, a unique inhibitor-water interaction was discovered to impart excellent broad kinase selectivity. Improvements in intrinsic potency were achieved by utilizing a rapid library approach, while targeted structural changes to lower lipophilicity led to improved rat pharmacokinetics. This multi-pronged approach led to the identification of 31, which demonstrated encouraging rat pharmacokinetics, in vivo potency, and excellent off-target kinase selectivity.
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Affiliation(s)
- Tony Siu
- Department of Medicinal Chemistry, Merck & Co., 33 Avenue Louis Pasteur, Boston, MA 02115, USA.
| | | | - Michael D Altman
- Department of Structural Chemistry, Merck & Co., 33 Avenue Louis Pasteur, Boston, MA 02115, USA
| | - Matthew Katcher
- Department of Medicinal Chemistry, Merck & Co., 33 Avenue Louis Pasteur, Boston, MA 02115, USA
| | - Alan Northrup
- Department of Medicinal Chemistry, Merck & Co., 33 Avenue Louis Pasteur, Boston, MA 02115, USA
| | - Catherine White
- Department of Medicinal Chemistry, Merck & Co., 33 Avenue Louis Pasteur, Boston, MA 02115, USA
| | - Craig Rosenstein
- Department of In Vitro Sciences, Merck & Co., 33 Avenue Louis Pasteur, Boston, MA 02115, USA
| | - Anjili Mathur
- Department of Pharmacology, Merck & Co., 33 Avenue Louis Pasteur, Boston, MA 02115, USA
| | - Lin Xu
- Department of Drug Metabolism, Merck & Co., 33 Avenue Louis Pasteur, Boston, MA 02115, USA
| | - Grace Chan
- Department of In Vitro Sciences, Merck & Co., 33 Avenue Louis Pasteur, Boston, MA 02115, USA
| | - Eric Bachman
- Department of Pharmacology, Merck & Co., 33 Avenue Louis Pasteur, Boston, MA 02115, USA
| | - Melaney Bouthillette
- Department of Basic Pharmaceutical Sciences, Merck & Co., 33 Avenue Louis Pasteur, Boston, MA 02115, USA
| | - Christopher J Dinsmore
- Department of Medicinal Chemistry, Merck & Co., 33 Avenue Louis Pasteur, Boston, MA 02115, USA
| | - C Gary Marshall
- Department of Oncology, Merck & Co., 33 Avenue Louis Pasteur, Boston, MA 02115, USA
| | - Jonathan R Young
- Department of Medicinal Chemistry, Merck & Co., 33 Avenue Louis Pasteur, Boston, MA 02115, USA
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