Precursor synthesis and radiolabelling of [11C]ADAM: a potential radioligand for the serotonin transporter exploration by PET
作者:Johnny VERCOUILLIE、Jari TARKIAINEN、Christer HALLDIN、Patrick EMOND、Sylvie CHALON、Johan SANDELL、Oliver LANGER、Denis GUILLOTEAU
DOI:10.1002/jlcr.436
日期:2001.2
The serotoninergic system is involved in a variety of neurological and psychiatric disorders. Exploration of the serotonin transporters (5-HTT) in living human brain by PET would be of great value for better understanding, diagnosis and therapeutic follow up of these diseases. In order to obtain a selective radioligand to explore the 5-HTT by PET we report the synthesis of [11C]N,N-dimethyl-2-(2-amino-4-iodophenylthio)-benzylamine ([11C]ADAM). The precursor for labelling N-demethyl ADAM, was obtained in five steps using 2,5-dibromonitrobenzene and 2-thio-N-methylbenzamide as starting material. [11C]ADAM was synthesised by N-alkylation of the precursor using [11C]methyl iodide in DMF. The incorporation yield of [11C]methyl iodide was in the range of 50 to 70%. Finally [11C]ADAM was obtained in 30 minutes synthesis time including HPLC and with a radiochemical purity better than 99%. Copyright © 2001 John Wiley & Sons, Ltd.
血清素能系统与多种神经和精神疾病有关。利用正电子发射计算机断层显像技术研究活体人脑中的血清素转运体(5-HTT)对更好地了解、诊断和跟踪治疗这些疾病具有重要价值。为了获得通过 PET 研究 5-HTT 的选择性放射性配体,我们报告了[11C]N,N-二甲基-2-(2-氨基-4-碘苯硫基)-苄胺([11C]ADAM)的合成。标记 N-二甲基 ADAM 的前体以 2,5-二溴硝基苯和 2-硫代-N-甲基苯甲酰胺为起始原料,分五步获得。在 DMF 中使用[11C]甲基碘对前体进行 N-烷基化合成了[11C]ADAM。[11C]甲基碘的结合率在 50% 到 70% 之间。最后,[11C]ADAM 在包括 HPLC 在内的 30 分钟合成时间内获得,放射化学纯度优于 99%。Copyright © 2001 John Wiley & Sons, Ltd. All Rights Reserved.