18F-FESB: synthesis and automated radiofluorination of a novel18F-labeled pet tracer forβ-amyloid plaques
作者:Piyush Kumar、Weizhong Zheng、Stephen A. McQuarrie、Jack H. Jhamandas、Leonard I. Wiebe
DOI:10.1002/jlcr.1011
日期:2005.11
1-(2′-[18F]-fluoroethoxy)-2,5-bis(4′-methoxystyryl)benzene (18F-FESB) was synthesized in ∼76% radiochemical yield (specific activity >58.6 GBq or 1.58 Ci/µmol) in an Advanced Cyclotron Systems' automated synthesis unit by nucleophilic substitution of 1-(2′-toluenesulfonylethoxy)-2,5-bis(4′-methoxystyryl)benzene and purified using reversed phase column chromatography. When performed in the presence
1-(2'-[18F]-氟乙氧基)-2,5-双(4'-甲氧基苯乙烯基)苯 (18F-FESB) 的合成率约为 76%(比活性 >58.6 GBq 或 1.58 Ci/µmol)在 Advanced Cyclotron Systems 的自动合成装置中,通过 1-(2'-甲苯磺酰乙氧基)-2,5-双(4'-甲氧基苯乙烯基)苯的亲核取代,并使用反相柱色谱纯化。当在离子流体存在下进行时,1-丁基-3-甲基咪唑鎓四氟硼酸盐(Bmim四氟硼酸盐;BmimBF4)或 1-乙基-3-甲基咪唑鎓三氟甲磺酸盐(Emimtriflate;EmimTFMS),18F-FESB 的放射化学产率范围为 17% 到 76% . 在没有这些离子流体的情况下,放射化学产率始终较低(~3-7%)。版权所有 © 2005 John Wiley & Sons, Ltd.