[11C]Carfentanil ([11C]CFN) is a selective radiotracer for in vivo positron emission tomography imaging studies of the μ-opioid system that, in our laboratories, is synthesized by methylation of the corresponding carboxylate precursor with [11C]MeOTf, and purified using a C2 solid-phase extraction cartridge. Changes in the commercial availability of common C2 cartridges have necessitated future proofing the synthesis of [11C]CFN to maintain reliable delivery of the radiotracer for clinical imaging studies. An updated synthesis of [11C]CFN is reported that replaces a now obsolete purification cartridge with a new commercially available version and also substitutes the organic solvents used in traditional production methods with ethanol.
[11C]
卡芬太尼([11C]CFN)是一种选择性放射性示踪剂,用于μ-阿片类系统的体内正电子发射断层扫描成像研究。在我们的实验室中,[11C]CFN是通过用[11C]MeOTf甲基化相应的
羧酸前体合成的,并使用C2固相萃取柱纯化。由于常见的C2柱的商业可用性发生变化,有必要在未来验证[11C]CFN的合成,以保持放射性示踪剂在临床成像研究中的可靠输送。据报道,[11C]CFN的最新合成方法是用新的市售版本取代现已过时的纯化柱,并用
乙醇代替传统生产方法中使用的有机溶剂。