摘要:
This Letter details the discovery and subsequent optimization of a novel M-4 PAM scaffold based on an 6fluoro-4-(piperidin-1-yl) quinoline-3-carbonitrile core, which represents a distinct departure from the classical M4 PAM chemotypes. Optimized compounds in this series demonstrated improved M-4 PAM potency on both human and rat M-4 (4 to 5-fold relative to HTS hit), and displayed attractive physicochemical and DMPK profiles, including good CNS penetration (rat brain: plasma K-p = 5.3, K-p,K-uu = 2.4; MDCK-MDR1 (P-gp) ER = 1.1). (C) 2017 Elsevier Ltd. All rights reserved.