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ID: ALA4033702
Journal: Bioorg Med Chem Lett
Title: Challenges in the development of an M4 PAM preclinical candidate: The discovery, SAR, and in vivo characterization of a series of 3-aminoazetidine-derived amides.
Authors: Tarr JC, Wood MR, Noetzel MJ, Bertron JL, Weiner RL, Rodriguez AL, Lamsal A, Byers FW, Chang S, Cho HP, Jones CK, Niswender CM, Wood MW, Brandon NJ, Duggan ME, Conn PJ, Bridges TM, Lindsley CW.
Abstract: This letter details the continued chemical optimization of a novel series of M4 positive allosteric modulators (PAMs) based on a 5-amino-thieno[2,3-c]pyridazine core by incorporating a 3-amino azetidine amide moiety. The analogs described within this work represent the most potent M4 PAMs reported for this series to date. The SAR to address potency, clearance, subtype selectivity, CNS exposure, and P-gp efflux are described. This work culminated in the discovery of VU6000918, which demonstrated robust efficacy in a rat amphetamine-induced hyperlocomotion reversal model at a minimum efficacious dose of 0.3mg/kg.
CiteXplore: 28522253