作者:Kenneth Dahl、Magnus Schou、Christer Halldin
DOI:10.1002/jlcr.2970
日期:2012.11
A commercial microfluidic device (NanoTek, Advion) was used as a synthesis platform for the preparation of fluorine-18 labelled tertiary amines in two consecutive steps. Firstly, the nucleophilic radiofluorination of an aromatic aldehyde and secondly, the reductive amination to produce the corresponding amine. Fluorine-18 labelled [18F]fluorobenzaldehyde ([18F]2) was obtained in an analytical radiochemical yield (rcy) of 93% and a preparative yield of 60% (decay corrected). The produced [18F]2 was applied in two model reactions yielding [18F]5 and [18F]6 in analytical rcy 70 and 75%, respectively. To further test the utility of this methodology, a delta opioid agonist, [18F]8, was also radiolabelled using the same setup in an analytical rcy of 29%. In a preparative run, 1050 MBq (28.4 mCi) isolated product ([18F]6) was obtained in a 37.5% decay corrected overall rcy calculated from [18F]fluoride. The radiochemical purity of [18F]6 was greater than 99% and the specific radioactivity 298 GBq/µmol (8052 Ci/mmol) at end of synthesis.
使用商用微流控装置(NanoTek,Advion)作为合成平台,通过两个连续步骤制备氟-18 标记的叔胺。首先是芳香醛的亲核放射性氟化反应,然后是还原胺化反应生成相应的胺。得到的氟-18 标记[18F]氟苯甲醛([18F]2)的放射化学分析收率(rcy)为 93%,制备收率为 60%(衰变校正)。生成的[18F]2 被应用于两个模型反应中,得到了[18F]5 和 [18F]6,分析收率分别为 70% 和 75%。为了进一步测试该方法的实用性,还使用相同的装置对δ类阿片激动剂[18F]8 进行了放射性标记,分析回收率为 29%。 在一次制备运行中,获得了 1050 MBq(28.4 mCi)的分离产物([18F]6),根据[18F]氟化物计算的衰变校正总 rcy 为 37.5%。合成结束时,[18F]6 的放射化学纯度大于 99%,比放射性为 298 GBq/µmol(8052 Ci/mmol)。