The polymer supported phosphazene bases PS-P2tBu and the novel PS-P2PEG allowed for efficient extraction of [18F]F− from proton irradiated [18O]H2O and subsequent radiofluorination of a broad range of substrates directly on the resin. The highest radiochemical yields were obtained with aliphatic sulfonates (69%) and bromides (42%); the total radiosynthesis time was 35–45 min. The multivariate analysis showed that the radiochemical yields and purities were controlled by the resin load, reaction temperature, and column packing effects. The resins could be reused several times with the same or different substrates. The fully automated on-column radiofluorination methodology was applied to the radiosynthesis of the important PET radiotracers [18F]FLT and [18F]FDG. The latter was produced with 40% yield on a 120 GBq scale and passed GMP-regulated quality control required for commercial production of [18F]FDG. The combination of compact form factor, simplicity of [18F]F− recovery and processing, and column reusability can make solid phase radiofluorination an attractive radiochemistry platform for the emerging dose-on-demand instruments for bedside production of PET radiotracers.
聚合物支撑的
磷杂烯基PS-P2tBu和新型PS-P2P
EG有效地从质子辐照的[18O]H2O中提取了[18F]F−,并在
树脂上直接进行广泛底物的放射
氟化。最高的放射
化学产率是在脂肪族
磺酸盐(69%)和
溴化物(42%)中获得的;总的放射合成时间为35-45分钟。多变量分析表明,放射
化学产率和纯度受
树脂负载、反应温度和柱填充效果的控制。
树脂可以在同一或不同底物的情况下重复使用多次。完全自动化的柱上放射
氟化方法应用于重要PET放射示踪剂[18F]FLT和[18F]FDG的放射合成。后者以40%的产率在120 GBq规模上生产,并通过了GMP规定的质量控制,满足商业生产[18F]FDG的要求。紧凑的形状、[18F]F−的回收和处理的简便性以及柱的可重复使用性,使固相放射
氟化成为新兴的按需剂量生产PET放射示踪剂的一个有吸引力的放射
化学平台。