Synthesis of a phenolic precursor and its efficient<i>O</i>-[<sup>18</sup>F]fluoroethylation with purified no-carrier-added [<sup>18</sup>F]2-fluoroethyl brosylate as the labeling agent
作者:Nashwa Jarkas、Ronald J. Voll、Mark M. Goodman
DOI:10.1002/jlcr.3046
日期:2013.9
[18F]2-Fluoroethyl-p-toluenesulfonate also called [18F]2-fluoroethyl tosylate has been widely used for labeling radioligands for positron emission tomography (PET). [18F]2-Fluoroethyl-4-bromobenzenesulfonate, also called [18F]2-fluoroethyl brosylate ([18F]F(CH2)2OBs), was used as an alternative radiolabeling agent to prepare [18F]FEOHOMADAM, a fluoroethoxy derivative of HOMADAM, by O-fluoroethylating the phenolic precursor. Purified by reverse-phase HPLC, the no-carrier-added [18F]F(CH2)2OBs was obtained in an average radiochemical yield (RCY) of 35%. The reaction of the purified and dried [18F]F(CH2)2OBs with the phenolic precursor was performed by heating in DMF and successfully produced [18F]FEOHOMADAM, after HPLC purification, in RCY of 21%. Copyright © 2013 John Wiley & Sons, Ltd.
[18F]2-氟乙基对甲苯磺酸盐又称[18F]2-氟乙基对甲苯磺酸盐,已被广泛用于标记正电子发射断层扫描(PET)的放射性配体。[18F]2-氟乙基-4-溴苯磺酸盐,又称[18F]2-氟乙基对甲苯磺酸盐([18F]F(CH2)2OBs),被用作一种替代放射性标记剂,通过对酚类前体进行 O-氟乙基化,制备出 HOMADAM 的氟乙氧基衍生物 [18F]FEOHOMADAM。通过反相高效液相色谱纯化,得到了无载体添加的[18F]F(CH2)2OBs,平均放射化学收率(RCY)为 35%。将纯化和干燥的[18F]F(CH2)2OBs 与酚类前体在 DMF 中加热反应,成功制得[18F]FEOHOMADAM,HPLC 纯化后的 RCY 为 21%。Copyright © 2013 John Wiley & Sons, Ltd. All Rights Reserved.