Synthesis and initial PET imaging of new potential dopamine D3 receptor radioligands (E)-4,3,2-[11C]methoxy-N-4-(4-(2-methoxyphenyl)piperazin-1-yl)butyl-cinnamoylamides
作者:Mingzhang Gao、Bruce H. Mock、Gary D. Hutchins、Qi-Huang Zheng
DOI:10.1016/j.bmc.2005.06.055
日期:2005.11
D3 receptor radioligands (E)-4,3,2-[11C]methoxy-N-4-(4-(2-methoxyphenyl)piperazin-1-yl)butyl-cinnamoylamid es (4-[11C]MMC, [11C]1a; 3-[11C]MMC, [11C]1b; and 2-[11C]MMC, [11C]1c) were synthesized for evaluation as novel potential positron emission tomography (PET) imaging agents for brain D3 receptors. The new tracers 4,3,2-[11C]MMCs were prepared by O-[11C]methylation of corresponding precursors (E)-4
D3受体放射性配体(E)-4,3,2- [11C]甲氧基-N-4-(4-(2-甲氧基苯基)哌嗪-1-基)丁基肉桂酰胺(4- [11C] MMC,[11C合成了] 1a; 3- [11C] MMC,[11C] 1b;和2- [11C] MMC,[11C] 1c)作为脑D3受体的新型潜在正电子发射断层扫描(PET)成像剂进行评估。通过对相应的前体(E)-4,3,2-羟基-N-4-(4-(2-甲氧基苯基)哌嗪)进行O- [11C]甲基化来制备新的示踪剂4,3,2- [11C] MMC使用[11C]三氟甲磺酸甲酯,通过固相萃取(SPE)纯化程序分离出-1-基)丁基肉桂酰胺(4,3,2-HMCs),放射化学产率为40-65%,衰变校正至轰击结束(EOB),合成时间为15-20分钟。使用我们实验室开发的动物PET扫描仪IndyPET-II对大鼠中的示踪剂[11C] 1a-c进行PET动力学研究。结果显示,脑摄取序列为4-