Design, Synthesis, Radiolabeling, and in Vivo Evaluation of Carbon-11 Labeled <i>N</i>-[2-[4-(3-Cyanopyridin-2-yl)piperazin-1-yl]ethyl]-3-methoxybenzamide, a Potential Positron Emission Tomography Tracer for the Dopamine D<sub>4</sub> Receptors
作者:Enza Lacivita、Paola De Giorgio、Irene T. Lee、Sean I. Rodeheaver、Bryan A. Weiss、Claudia Fracasso、Silvio Caccia、Francesco Berardi、Roberto Perrone、Ming-Rong Zhang、Jun Maeda、Makoto Higuchi、Tetsuya Suhara、John A. Schetz、Marcello Leopoldo
DOI:10.1021/jm100925m
日期:2010.10.28
synthesis, and evaluation of physicochemical and pharmacological properties of D4 dopamine receptor ligands related to N-[2-[4-(4-chlorophenyl)piperazin-1-yl]ethyl]-3-methoxybenzamide (2). Structural features were incorporated to increase affinity for the target receptor, to improve selectivity over D2 and σ1 receptors, to enable labeling with carbon-11 or fluorine-18, and to adjust lipophilicity within
这里,我们描述的设计,合成,和d的物理化学和药理学性质的评价4相关的多巴胺受体配体ñ - ([2- [4-(4-氯苯基)哌嗪-1-基]乙基] -3-甲氧基苯甲酰胺2)。结合结构特征以增加对目标受体的亲和力,提高对 D 2和 σ 1受体的选择性,能够用碳 11 或氟 18 进行标记,并在被认为最适合脑渗透和低非特异性的范围内调整亲脂性捆绑。化合物7和13显示出总体最佳特性:对 D 4 的纳摩尔亲和力受体,比 D 2和 D 3多巴胺受体、5-HT 1A、5-HT 2A和 5-HT 2C 5-羟色胺受体和 σ 1受体的选择性 > 100 倍,并且 log P = 2.37-2.55。在小鼠腹膜内给药后,两种化合物迅速进入中枢神经系统。的甲氧基ñ - [2- [4-(3-氰基吡啶-2-基)哌嗪-1-基]乙基] -3-甲氧基苯甲酰胺(7)用碳-11进行放射性标记,并在非人类进行PET分析灵长类动物。[