Fast and reliable method for the preparation of ortho- and para-[18F]fluorobenzyl halide derivatives: Key intermediates for the preparation of no-carrier-added PET aromatic radiopharmaceuticals
作者:Christian Lemaire、Lionel Libert、Alain Plenevaux、Joël Aerts、Xavier Franci、André Luxen
DOI:10.1016/j.jfluchem.2012.03.015
日期:2012.6
Reduction of the aldehydes (>95%) was near-quantitative with an aqueous solution of NaBH4. Halogenation was performed on the same support with different aqueous solutions of concentrated acid (HI, HBr, HCl). The conversion of benzyl alcohols into [18F]fluorobenzyl halides (X = Cl, Br, I) usually proceeded within 2 min at high yields. The halogenation proceeded at room temperature, with the exception of the
开发了一种适用于从几种[ 18 F]氟苯甲醛自动制备(取代的)[ 18 F]氟苄基卤化物的快速可靠的方法。三甲基苯甲醛三氟甲磺酸铵和硝基前体的芳香亲核取代反应是通过不添加载体的[ 18 F]氟化物实现的。标记后,将含氟18的醛截留在固相萃取(SPE)柱上,然后直接在线上在载体上转化为苄基卤。用NaBH 4水溶液对醛的还原(> 95%)几乎是定量的。在相同的载体上用不同的浓酸水溶液(HI,HBr,HCl)进行卤化。苄基醇向[ 18 F]氟苄基卤化物(X = Cl,Br,I)的转化通常在2分钟内以高收率进行。除2- [ 18 F]氟-3-甲氧基苄基,2-和4- [ 18 F]氟苄基卤化物外,卤化反应在室温下进行,需要使用HBr / HOAc(33%)。通过这种方法,各种[ 18获得的F]氟苄基氯,溴化物和碘化物具有很高的放射化学纯度(> 90%),总放射化学产率为15-70%。从EOB分别在铵