Preparation of 3′-deoxy-3′-[18F]fluorothymidine ([18F]FLT) in ionic liquid, [bmim][OTf]
作者:Byung Seok Moon、Kyo Chul Lee、Gwang Il An、Dae Yoon Chi、Seung Dae Yang、Chang Woon Choi、Sang Moo Lim、Kwon Soo Chun
DOI:10.1002/jlcr.1046
日期:2006.3.15
Although 3′-deoxy-3′-[18F]fluorothymidine ([18F]FLT) is a prospective radiopharmaceutical for the imaging of proliferating tumor cell, it is difficult to prepare large amount of [18F]FLT. We herein describe the preparation of [18F]FLT in an ionic liquid, [bmim][OTf] (1-butyl-3-methyl-imidazolium trifluoromethanesulfonate). At optimized condition, [18F]fluorinationin ionic liquid with 5 µl of 1 M KHCO3 and 5 mg of the precursor yielded 61.5 ± 4.3% (n=10). Total elapsed time was about 70 min including HPLC purification. The rapid synthesis of [18F]FLT can be achieved by removing all evaporation steps. Overall radiochemical yield and radiochemical purity were 30 ± 5% and >95%, respectively. This method can use a small amount of a nitrobenzenesulfonate precursor and can be adapted for automated production. Copyright © 2006 John Wiley & Sons, Ltd.
尽管3′-脱氧-3′-[18F]氟代胸苷([18F]FLT)是一种用于肿瘤细胞增殖成像的前瞻性放射性药物,但很难制备大量[18F]FLT。本文描述了在离子液体[bmim][OTf](1-丁基-3-甲基-咪唑三氟甲磺酸盐)中制备[18F]FLT的方法。在优化条件下,在离子液体中用5 µl 1 M KHCO3和5 mg前体进行[18F]氟化反应,可获得61.5 ± 4.3%(n=10)的产物。包括HPLC纯化在内的总耗时约为70分钟。通过去除所有蒸发步骤,可以快速合成[18F]FLT。总放射化学产率和放射化学纯度分别为30 ± 5%和>95%。该方法可以使用少量的硝基苯磺酸酯前体,并且可以适用于自动化生产。版权所有 © 2006 John Wiley & Sons, Ltd.