Synthesis, Structure−Affinity Relationships, and Radiolabeling of Selective High-Affinity 5-HT<sub>4</sub> Receptor Ligands as Prospective Imaging Probes for Positron Emission Tomography
作者:Rong Xu、Jinsoo Hong、Cheryl L. Morse、Victor W. Pike
DOI:10.1021/jm100668r
日期:2010.10.14
In a search for high-affinity receptor ligands that might serve for development as radioligands for the imaging of brain 5-HT4 receptors in vivo with positron emission tomography (PET), structural modifications were made to the high-affinity 5-HT4 antagonist (1-butylpiperidin-4-yl)methyl 8-amino-7-iodo-2,3-dihydrobenzo[b][1,4]dioxine-5-carboxylate (1, SB 207710). These modifications were made mainly
在寻找可用作放射性配体的高亲和力受体配体,用于使用正电子发射断层扫描 (PET) 在体内成像脑 5-HT 4受体时,对高亲和力 5-HT 4拮抗剂进行了结构修饰(1-丁基哌啶-4-基)甲基 8-氨基-7-碘-2,3-二氢苯并[ b ][1,4]二恶英-5-羧酸酯 ( 1 , SB 207710)。这些修饰主要在酯键的芳基侧进行,以允许用正电子发射体快速标记羧酸组分,碳 11 ( t 1/2 = 20.4 min) 或氟 18 ( t 1/2= 109.7 分钟),并且包括 (i) 用小的取代基如腈、甲基或氟取代碘原子,(ii) 8-氨基的甲基化,(iii) 二恶烷环的打开,以及( iv) N-烷基组长度的改变。发现了重组人 5-HT 4受体的高亲和力配体,这些配体适合用正电子发射体进行标记,并且具有作为成像探针的开发潜力。开环放射性配体(([甲氧基- 11 C]1-丁基哌啶-4-基)4-氨基-3-甲氧基苯甲酸甲酯;[