One-step radiosynthesis of 4-[18F]flouro-3-nitro-N-2-propyn-1-yl-benzamide ([18F]FNPB): a new stable aromatic porosthetic group for efficient labeling of peptides with fluorine-18
作者:Yesen Li、Yaqin Liu、Lan Zhang、Yuhong Xu
DOI:10.1002/jlcr.2931
日期:2012.5.30
4-[18F]flouro-3-nitro-N-2-propyn-1-yl-benzamide ([18F]FNPB) was developed as a new stable aromatic prosthetic group for more efficient click labeling of peptides. A new aromatic precursor 3,4-dinitro-N-2-propyn-1-yl-benzamide was radiofluorinated using [18F]KF/K2.2.2 followed by HPLC purification to obtain the desired product [18F]FNPB. [18F]FNPB was synthesized with a 58% radiochemical yield, a specific activity > 350 GBq/µmol, and radiochemical purity was exceeded 98% in 40 min. The in vitro stability studies showed no detectable radiodefluorination over 2 h in mouse plasma. The click labeling yield of three different peptides with [18F]FNPB were all above 87%. The in vitro study suggests that [18F]FNPB may be stable in vivo and could have general application in labeling peptides with high radiochemical yield for positron emission tomography applications. Copyright © 2012 John Wiley & Sons, Ltd.
4-[18F]flouro-3-nitro-N-2-propyn-1-yl-benzamide ([18F]FNPB)作为一种新的稳定芳香族前体基团被开发出来,用于更有效地点击标记多肽。使用[18F]KF/K2.2.2 对新的芳香族前体 3,4-二硝基-N-2-丙炔-1-基苯甲酰胺进行放射性氟化,然后进行 HPLC 纯化,得到所需的产物[18F]FNPB。合成[18F]FNPB 的放射化学收率为 58%,比活度大于 350 GBq/µmol,放射化学纯度在 40 分钟内超过 98%。体外稳定性研究表明,在小鼠血浆中 2 小时内检测不到放射性氟化。用[18F]FNPB 对三种不同的肽进行点击标记,标记率均超过 87%。体外研究表明,[18F]FNPB 在体内可能是稳定的,可普遍应用于标记正电子发射断层扫描应用中具有高放射化学收率的多肽。Copyright © 2012 John Wiley & Sons, Ltd. All Rights Reserved.