Synthesis and Evaluation of a Novel Series of 2-Chloro-5-((1-methyl-2-(<i>S</i>)-pyrrolidinyl)methoxy)-3-(2-(4-pyridinyl)vinyl)pyridine Analogues as Potential Positron Emission Tomography Imaging Agents for Nicotinic Acetylcholine Receptors
作者:LaVerne L. Brown、Santosh Kulkarni、Olga A. Pavlova、Andrei O. Koren、Alexey G. Mukhin、Amy H. Newman、Andrew G. Horti
DOI:10.1021/jm010550n
日期:2002.6.1
for nAChRs with greater lipophilicity than that of 1 would be potentially more favorable for PET imaging of nAChR due to its faster penetration through the BBB. Herein, a novel series of compounds has been developed based on the high affinity ligand for nAChRs, 2-chloro-5-((1-methyl-2-(S)-pyrrolidinyl)methoxy)-3-(2-(4-pyridinyl)vinyl)pyridine, 3b. The in vitro binding affinities for the new series were
据报道,2-[((18)F] fluoro-A-85380,1是一种很有前途的放射性示踪剂,可通过正电子发射断层扫描(PET)对人的烟碱型乙酰胆碱受体(nAChR)进行成像,它显示出穿过血脑屏障的缓慢渗透( BBB)由于其低亲脂性。亲脂性大于1的nAChRs配体由于nBChR可以更快地穿透BBB,因此可能对PET成像更有利。在此,基于对nAChR的高亲和力配体,2-氯-5-((1-甲基-2-(S)-吡咯烷基)甲氧基)-3-(2-(4-吡啶基)乙烯基)吡啶,3b。发现该新系列的体外结合亲和力在K(i)= 9-331pM的范围内。分子建模研究表明,这些化合物的构型和电子特性存在差异,这提供了对nAChR的构效关系的进一步了解。已经发现化合物3b-6b的亲脂性明显高于1。结果,化合物3b-6b的亲脂性可能比亲脂性较低的1更快地穿过BBB。N-甲基衍生物3b和6b证明了在nAChRs处具有非常高的亲和力(分别为K(i)=