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Bioorg Med Chem Lett. 2012 Dec 15;22(24):7523-9. doi: 10.1016/j.bmcl.2012.10.039. Epub 2012 Oct 16.

Identification of novel series of pyrazole and indole-urea based DFG-out PYK2 inhibitors.

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Worldwide Medicinal Chemistry, Pfizer Global Research and Development, 620 Memorial Drive, Cambridge, MA 02139, United States.


Previous drug discovery efforts identified classical PYK2 kinase inhibitors such as 2 and 3 that possess selectivity for PYK2 over its intra-family isoform FAK. Efforts to identify more kinome-selective chemical matter that stabilize a DFG-out conformation of the enzyme are described herein. Two sub-series of PYK2 inhibitors, an indole carboxamide-urea and a pyrazole-urea have been identified and found to have different binding interactions with the hinge region of PYK2. These leads proved to be more selective than the original classical inhibitors.

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