Discovery of a Highly Selective, Brain-Penetrant Aminopyrazole LRRK2 Inhibitor

Autor: John Atherall, Bryan K. Chan, Tracy Kleinheinz, Daniel G. Shore, Andrew D. Medhurst, Huifen Chen, Haitao Zhu, Anthony A. Estrada, Sara L. Dominguez, Kimberly Scearce-Levie, Jason Drummond, Alan Beresford, Kevin M. Nash, Zejuan Sheng, Mark Stuart Chambers, Zachary Kevin Sweeney, Andrew Gill, Claire E. Le Pichon, Shuo Zhang, Charles Baker-Glenn, John Moffat, Hervé Van de Poël, Daniel J. Burdick, Xingrong Liu
Rok vydání: 2012
Předmět:
Zdroj: ACS Medicinal Chemistry Letters. 4:85-90
ISSN: 1948-5875
DOI: 10.1021/ml3003007
Popis: The modulation of LRRK2 kinase activity by a selective small molecule inhibitor has been proposed as a potentially viable treatment for Parkinson's disease. By using aminopyrazoles as aniline bioisosteres, we discovered a novel series of LRRK2 inhibitors. Herein, we describe our optimization effort that resulted in the identification of a highly potent, brain-penetrant aminopyrazole LRRK2 inhibitor (18) that addressed the liabilities (e.g., poor solubility and metabolic soft spots) of our previously disclosed anilino-aminopyrimidine inhibitors. In in vivo rodent PKPD studies, 18 demonstrated good brain exposure and engendered significant reduction in brain pLRRK2 levels post-ip administration. The strategies of bioisosteric substitution of aminopyrazoles for anilines and attenuation of CYP1A2 inhibition described herein have potential applications to other drug discovery programs.
Databáze: OpenAIRE