Synthesis and analysis of 4-(3-fluoropropyl)-glutamic acid stereoisomers to determine the stereochemical purity of (4S)-4-(3-[18F]fluoropropyl)-L-glutamic acid ([18F]FSPG) for clinical use
作者:Kai-Ting Shih、Ya-Yao Huang、Chia-Ying Yang、Mei-Fang Cheng、Yu-Wen Tien、Chyng-Yann Shiue、Rouh-Fang Yen、Ling-Wei Hsin
DOI:10.1371/journal.pone.0243831
日期:——
for clinical use. To manufacture cGMP-compliant [18F]FSPG, all four nonradioactive stereoisomers of FSPG were prepared as reference standards for analysis. (2S,4S)-1 and (2R,4R)-1 were synthesized starting from protected L- and D-glutamate derivatives in three steps, whereas (2S,4R)-1 and (2R,4S)-1 were prepared in three steps from protected (S)- and (R)-pyroglutamates. A chiral HPLC method for simultaneous
(4小号)-4-(3- [ 18 F]氟丙基)-L-谷氨酸([ 18 F] FSPG)是用于测量系统中的正电子发射断层摄影(PET)成像剂X Ç -转运蛋白活性。在临床试验中已将其用于检测各种癌症和转移。[ 18 F] FSPG也是评估多发性硬化症,化学疗法中的耐药性,炎性脑病和感染性病变的有前途的诊断工具。由于18 F核素的半衰期非常短(110分钟),因此[ 18F] FSPG需要每天生产;因此,必须建立用于质量控制的快速有效的合成和分析方法,以确保用于临床的[ 18 F] FSPG的质量和安全性。为了制造符合cGMP的[ 18 F] FSPG,准备了FSPG的所有四种非放射性立体异构体作为分析的参考标准。(3S,4S)-1和(2R,4R)-1是从受保护的L-和D-谷氨酸衍生物分三步合成的,而(2S,4R)-1和(2R, 4 S)-1由受保护的(S)-和(R)-焦谷氨酸分三步制备。通过使用3