The present invention is related to a precursor for no-carrier-added fluorine-18 labeled ethacrynic acid, N-(4-[
18
F]fluorobutyl)-Ethacrynic amide([
18
F]FBuEA) and the preparation method for HPLC non-radioactive standards. Its chemical structure is shown in the following:
In the precursor, R
1
represents a protective group for the amide functional group; R
2
represents leaving group; or R
1
represents carboxyl group, R
2
represents p-tosyloxy, methane sulfonyloxy group or trifluoromethane sulfonyloxy group or bromine (Br). For the HPLC non-radioactive standards, R
1
represents a protective group for the amide functional group and hydrogen, R
2
represents fluorine.
本发明涉及一种用于无载体添加
氟-18标记的依他克酸前体,N-(4-[18F]
氟丁基)-依他克酰胺([18F]FBuEA)以及HPLC非放射性标准的制备方法。其
化学结构如下所示:在前体中,R1代表酰胺官能团的保护基;R2代表脱离基团;或者R1代表羧基,R2代表对
甲苯磺酰氧基、
甲磺酰氧基或三
氟甲磺酰氧基或
溴(Br)。对于HPLC非放射性标准,R1代表酰胺官能团的保护基和氢,R2代表
氟。