[<sup>18</sup>F]FPyKYNE, a fluoropyridine-based alkyne reagent designed for the fluorine-18 labelling of macromolecules using click chemistry
作者:Bertrand Kuhnast、Françoise Hinnen、Bertrand Tavitian、Frédéric Dollé
DOI:10.1002/jlcr.1533
日期:2008.8
FPyKYNE (2-fluoro-3-pent-4-yn-1-yloxypyridine) is a novel fluoropyridine-based structure, designed for the fluorine-18 labelling of macromolecules using copper-catalysed Huisgen 1,3-dipolar cycloaddition (click chemistry). FPyKYNE (non-labelled as reference), as well as the 2-bromo, 2-nitro and 2-trimethylammonium analogues (as precursors for labelling with fluorine-18), was synthesized in 44, 95, 60 and 41%, respectively, from commercially available 5-chloropent-1-yne and the appropriate 2-substituted-3-hydroxypyridines. [18F]FPyKYNE was synthesized in one single radiochemical step by reaction of no-carrier-added K[18F]F-Kryptofix®222 (DMSO, 165°C, 3–5 min) followed by C-18 SepPak cartridge pre-purification and finally semi-preparative HPLC purification on a Hewlett Packard SiO2 Zorbax® Rx-SIL. Using the 2-nitropyridine or the pyridin-2-yltrimethylammonium trifluoromethanesulphonate precursor for labelling (30 and 10 µmol, respectively), incorporation yields up to 90% were observed and 7.0–8.9 GBq (190–240 mCi) of [18F]FPyKYNE ([18F]-1) could be isolated within 60–70 min (HPLC purification included), starting from a 37.0 GBq (1.0 Ci) [18F]fluoride batch (overall decay-corrected and isolated yields: 30–35%). Copyright © 2008 John Wiley & Sons, Ltd.
FPyKYNE(2-氟-3-戊-4-炔-1-氧基吡啶)是一种新型的氟吡啶基结构,旨在通过铜催化的Huisgen 1,3-偶极环加成(点击化学)对大分子进行氟-18标记。FPyKYNE(未标记作为参考)以及2-溴、2-硝基和2-三甲基铵类似物(作为氟-18标记的前体)分别以44%、95%、60%和41%的产率从商业可得的5-氯戊-1-炔和适当的2-取代-3-羟基吡啶合成。[18F]FPyKYNE通过与无载体的K[18F]F-Kryptofix®222反应(DMSO,165°C,3–5分钟)在一个放射化学步骤中合成,随后进行C-18 SepPak柱的预纯化,最后在Hewlett Packard SiO2 Zorbax® Rx-SIL上进行半制备HPLC纯化。使用2-硝基吡啶或吡啶-2-基三甲基铵三氟甲磺酸盐前体进行标记(分别为30和10微摩尔),观察到高达90%的掺入产率,并且可以在60–70分钟内分离出7.0–8.9 GBq(190–240 mCi)的[18F]FPyKYNE([18F]-1),起始于37.0 GBq(1.0 Ci)的[18F]氟化物批次(整体衰减校正和分离产率:30–35%)。版权所有 © 2008 John Wiley & Sons, Ltd.