Novel synthesis of [1-11C]?-vinyl-?-aminobutyric acid ([1-11C]GVG) for pharmacokinetic studies of addiction treatment
作者:Zongren Zhang、Yu-Shin Ding、Andrei R. Studenov、Madina R. Gerasimov、Richard A. Ferrieri
DOI:10.1002/jlcr.544
日期:2002.3.15
γ-Vinyl-γ-aminobutyric acid (GVG, Vigabatrin®), a suicide inhibitor of GABA-transaminase (GABA-T), has been suggested as a new drug for the treatment of substance abuse. In order to better understand its pharmacokinetics and potential side effects, we have developed a radiosynthesis of carbon-11 (t1/2=20 min) labeled GVG for positron emission tomographic (PET) studies. We report here a novel synthetic strategy to prepare the precursor and to efficiently label GVG with C-11. 5-Bromo-3-(carbobenzyloxy)amino-1-pentene was synthesized in five steps from homoserine lactone, including reduction and methylenation. This was used in a one-pot, two-step radiosynthesis. Displacement of bromide with no-carrier-added [11C]cyanide followed by acid hydrolysis afforded [1-11C]GVG with decay corrected radiochemical yields of 27±9% (n=6, not optimized) with respect to [11C]cyanide in a synthesis time of 45 min. Copyright © 2002 John Wiley & Sons, Ltd.
γ-乙烯基-γ-氨基丁酸(GVG,维加巴林®)是一种伪自杀抑制剂,作用于GABA转氨酶(GABA-T),被建议作为治疗物质滥用的新药。为了更好地理解其药代动力学和潜在副作用,我们开发了一种碳-11(半衰期=20分钟)标记的GVG的放射合成方法,用于正电子发射断层扫描(PET)研究。我们在此报告了一种新颖的合成策略,以制备前驱体并高效标记GVG。5-溴-3-(羧苄氧基)氨基-1-戊烯是在五个步骤内从同源氨基酸内酯合成而来的,包括还原和亚甲基化。该化合物被用于一锅两步的放射合成。通过无载体添加的[11C]氰化物取代溴化物,随后进行酸性水解,得到[1-11C]GVG,经过衰变修正的放射化学产率为27±9%(n=6,未优化),合成时间为45分钟。版权所有 © 2002 John Wiley & Sons, Ltd.