corrected) in 40 min synthesis time with a molar activity of 37–81 GBq/µmol (1000–2200 Ci/mmol). Slightly lower elution efficiency (~55%) was observed with the triflate precursor of [18F]FDHT. Fluorine-18 labeling, reduction, and deprotection to prepare [18F]FDHT were performed on Sep-Pak cartridges (PS-HCO3 and Sep-Pak plus C-18). The overall yield of [18F]FDHT was 25–32% (decay corrected) in 70 min
为了进一步探索我们最近开发的“Sep-Pak
氟化”方法的范围,我们准备了两种著名的正电子发射断层扫描 (PET) 示踪剂 21-[18F]fluoro-16α,17α-[(R)-(1' -α-furylmethylidene)dioxy]-19-norpregn-4-ene-3,20-dione furanyl norprogesterone ([18F]FFNP) 和 16β-[18F]fluoro-5α-dihydrotestosterone ([18F]FDHT)。遵循“Sep-Pak
氟化”方法,使用 3 mg [18F]FFNP 的
三氟甲磺酸酯前体观察到超过 70% 的洗脱效率。[18F]FFNP 的总产率为 64-72%(衰减校正),合成时间为 40 分钟,摩尔活性为 37-81 GBq/μmol(1000-2200 Ci/mmol)。观察到 [18F]FDHT 的
三氟甲磺酸酯前体的洗脱效率略低