5-HT1A receptors are involved in a variety of psychiatric disorders and in vivo molecular imaging of the 5-HT1A status represents an important approach to analyze and treat these disorders. We report herein the synthesis of three new fluoroethylated 5-HT1A ligands (AH1.MZ, AH2.MZ and AH3.MZ) as arylpiperazine derivatives containing a norbornene group. AH1.MZ (Ki= 4.2 nM) and AH2.MZ (Ki=30 nM) showed reasonable in vitro affinities to the 5-HT1A receptor, whereas AH3.MZ appeared to be non-affine toward the 5-HT1A receptor. The receptor profile of AH1.MZ and AH2.MZ showed selectivity within the 5-HT system. 18F-labelling via [18F]FETos to [18F]AH1.MZ was carried out in radiochemical yields of >70%. The final formulation of injectable solutions including [18F]FETos synthon synthesis, radiosynthesis and semi-preparative high-performance liquid chromatography (HPLC) separation took no longer than 130 min and provided [18F]AH1.MZ with a purity of >98% as indicated by analytical HPLC analyses. Copyright © 2009 John Wiley & Sons, Ltd.
5-HT1A受体参与多种精神疾病,活体分子影像学中5-HT1A状态的检测是分析和治疗这些疾病的重要方法。本文报道了三种新的含
氟乙基的5-HT1A
配体(AH1.MZ、AH2.MZ和AH3.MZ)的合成,它们是含有
降冰片烯基团的苯基
哌嗪衍
生物。AH1.MZ(Ki=4.2nM)和AH2.MZ(Ki=30nM)对5-HT1A受体表现出合理的体外亲和力,而AH3.MZ似乎对5-HT1A受体没有亲和力。AH1.MZ和AH2.MZ的受体特征显示在5-HT系统内的选择性。通过[18F]FETos对[18F]AH1.MZ进行18F标记的放射
化学产率>70%。注射液的最终配方包括[18F]FETos前体合成、放射合成和半制备高效
液相色谱(HPLC)分离,整个过程不超过130分钟,并通过分析HPLC分析表明[18F]AH1.MZ的纯度>98%。版权所有 © 2009 John Wiley & Sons, Ltd.