Strategies toward optimization of the metabolism of a series of serotonin-4 partial agonists: investigation of azetidines as piperidine isosteres
作者:Ronald Scott Obach、Erik A. LaChapelle、Michael A. Brodney、Michelle Vanase-Frawley、Gregory W. Kauffman、Aarti Sawant-Basak
DOI:10.3109/00498254.2016.1152522
日期:2016.12.1
well as functionalized piperidines were evaluated with the goal of identifying an alternative group that maintained the desired potency, functional activity, and reduced turnover in human hepatocytes. 3.Activities of 4-substituted piperidines or pyrrolidine analogs at the pharmacological target were not significantly altered, but the same metabolic pathways of N-dealkylation and oxazolidine formation
1.第一代5HT-4部分激动剂4- 4- [4-四氢呋喃-3-基氧基]-苯并[d]异恶唑-3-基氧基甲基]-哌啶-1-基甲基}-四氢吡喃-4-醇, PF-4995274(TBPT)被代谢为N-脱烷基(M1)和不寻常的环化恶唑烷(M2)代谢物。M1和M2对5HT受体亚型表现出药理活性,因此有待进一步研究其在人体内的处置特性。M2在体外是次要成分,但在人血浆中是主要的代谢产物。 2.为了使新陈代谢远离TBPT的哌啶环,设计,合成和分析了一系列杂环取代基。对包括氮杂环丁烷,吡咯烷以及官能化哌啶的组进行了评估,目的是鉴定出在人类肝细胞中保持所需效价,功能活性和减少营业额的替代组。 3、4-取代哌啶或吡咯烷类似物在药理学上的活性没有明显改变,但仍观察到相同的N-脱烷基化和恶唑烷形成的代谢途径。将这些改变为桥环系统可降低恶唑烷代谢物的形成,但不会降低N-脱烷基化。 4.这项工作最终确定了氮杂环丁烷为第二代5HT