N3-Substituted thymidine analogues III: radiosynthesis of N3-[(4-[18F]fluoromethyl-phenyl)butyl]thymidine ([18F]-FMPBT) and N3-[(4-[18F]fluoromethyl-phenyl)pentyl] thymidine ([18F]-FMPPT) for PET
作者:Pradip Ghosh、Juri G. Gelovani、Mian M. Alauddin
DOI:10.1002/jlcr.1425
日期:2007.11
Radiosyntheses of two N3-substituted thymidine analogues, N3-[(4[18F]fluoromethyl-phenyl)butyl]thymidine ([18F]-FMPBT) and N3-[(4[18F]fluoromethyl-phenyl)pentyl]thymidine ([18F]-FMPPT), are reported. The precursor compounds 9 and 10 were synthesized in six steps and the standard compounds 13 and 14 were synthesized from these precursors. For radiosynthesis, compounds 9 and 10 were fluorinated with n-Bu4N[18F] to produce [18F]-11 and [18F]-12, which by acid hydrolysis yielded [18F]-13 and [18F]-14, respectively. The crude products were purified by high-performance liquid chromatography to obtain [18F]-FMPBT and [18F]-FMPPT. The average decay-corrected radiochemical yield for [18F]-13 was 15% in five runs, and that for [18F]-14 was 10% in four runs. The radiochemical purity was >99% and the specific activity was >74 GBq/µmol at the end of synthesis. The synthesis time was 80–90 min from the end of bombardment. Copyright © 2007 John Wiley & Sons, Ltd.
报告了两种 N3 取代的胸苷类似物 N3-[(4[18F]氟甲基-苯基)丁基]胸苷([18F]-FMPBT)和 N3-[(4[18F]氟甲基-苯基)戊基]胸苷([18F]-FMPPT)的放射合成。前体化合物 9 和 10 分六个步骤合成,标准化合物 13 和 14 由这些前体合成。为了进行辐射合成,化合物 9 和 10 用 n-Bu4N[18F] 进行氟化,生成 [18F]-11 和 [18F]-12,通过酸水解分别得到 [18F]-13 和 [18F]-14。粗产物经高效液相色谱纯化后得到[18F]-FMPBT 和[18F]-FMPPT。五次实验中,[18F]-13 的平均衰变校正放射化学收率为 15%,四次实验中,[18F]-14 的平均衰变校正放射化学收率为 10%。合成结束时,放射化学纯度大于 99%,比活度大于 74 GBq/µmol。合成时间为轰击结束后的 80-90 分钟。Copyright © 2007 John Wiley & Sons, Ltd. All Rights Reserved.