<i>Ortho</i>-Stabilized<sup>18</sup>F-Azido Click Agents and their Application in PET Imaging with Single-Stranded DNA Aptamers
作者:Lu Wang、Orit Jacobson、Din Avdic、Benjamin H. Rotstein、Ido D. Weiss、Lee Collier、Xiaoyuan Chen、Neil Vasdev、Steven H. Liang
DOI:10.1002/anie.201505927
日期:2015.10.19
versatile building blocks for the radiolabeling of biomolecules via Huisgen cycloaddition (“click chemistry”) for positron emission tomography (PET). However, routine access to such clickable agents is challenged by inefficient and/or poorly defined multistep radiochemical approaches. A high‐yielding direct radiofluorination for azido 18F‐arenes was achieved through the development of an ortho‐oxygen‐stabilized
叠氮基18 F-芳烃是通过正电子发射断层扫描 (PET) 的 Huisgen 环加成(“点击化学”)对生物分子进行放射性标记的重要且通用的构建模块。然而,对此类可点击试剂的常规获取受到低效和/或定义不明确的多步骤放射化学方法的挑战。通过开发邻位氧稳定的碘鎓衍生物(OID),实现了叠氮基18 F-芳烃的高产率直接放射性氟化。该 OID 策略解决了对用于生物共轭反应的可靠叠氮基18 F-芳烃可点击试剂的未满足需求。使用该试剂对 ssDNA 适体进行放射性标记,并通过 PET 在人类结肠癌的异种移植小鼠模型中进行可视化,这表明这种 OID 方法是一种方便且高效的标记和跟踪生物分子的方法。