This Letter describes the chemical optimization of a novel series of M4 PAMs based on a non-enolizable ketone core, identified from an MLPCN functional high-throughput screen. The HTS hit was potent, selective and CNS penetrant; however, the compound was highly cleared in vitro and in vivo. SAR provided analogs for which M4 PAM potency and CNS exposure were maintained; yet, clearance remained high
这封信描述了基于不可烯化酮核的一系列新型M 4 P
AM的
化学优化,该酮核是从MLPCN功能性高通量筛选中鉴定出来的。H
TS命中力强,选择性强且具有CNS渗透性;但是,该化合物在体外和体内均高度清除。
SAR提供了维持M 4 P
AM效力和CNS暴露的类似物。但是,清除率仍然很高。代谢物鉴定研究表明,该系列产品经历了快速且接近定量的还原代谢,转化为相应的没有M 4 P
AM活性的仲醇代谢物。