作者:Tor Kihlberg、Bengt Långström
DOI:10.1002/jlcr.2580340705
日期:1994.7
The preparation of (all Z)-1,17-dichloro-4,7,10,13-heptadecatetraene is reported. The synthesis was performed in five steps with a total yield of 22 %, starting from 5-chloro-1-pentyne. The corresponding bis Grignard reagent was used in a copper-mediated coupling reaction with [1-11C]ethyl iodide followed by a carbonation with CO2 to afford [19-11C]arachidonic acid in 23 % decay corrected radiochemical yield within 52 min. The radiochemical purity of the final product was 98 %. In a typical run starting with 20 GBq [11C]O2, 760 MBq of [19-11C]arachidonic acid was obtained, with a specific activity of 1.6 GBq/μmol.
报告了 (all-Z)-1,17-二氯-4,7,10,13-十七碳四烯的制备方法。该合成以 5-氯-1-戊炔为起点,分五个步骤进行,总收率为 22%。在铜介导的偶联反应中使用相应的双格氏试剂与[1-11C]碘化乙酯发生偶联反应,然后用二氧化碳进行碳化,在 52 分钟内得到[19-11C]花生四烯酸,衰变校正放射化学收率为 23%。最终产品的放射化学纯度为 98%。在一次典型的运行中,从 20 GBq [11C]O2 开始,得到了 760 MBq 的[19-11C]花生四烯酸,比活度为 1.6 GBq/μmol。