[18F]Cholesteryl 4-(fluoromethyl)benzoate 6b was prepared from 3-cholesteryl [(4-nitrobenzenesulfonyl)oxymethyl]benzoate in one step using K+-Kryptofix 2.2.2, as counter ion and acetonitrile as the solvent at 40–60°C. The product was isolated by HPLC in 75% (decay corrected) radiochemical yield with a radiochemical purity of more than 90% in 30 min (specific radioactivity 2000–2500 Ci/mmol). Biodistribution studies in mice showed that a high target/non-target ratio of radioactivity was obtained in adrenal and ovaries. Copyright © 2001 John Wiley & Sons, Ltd.
[18F]
胆固醇-4-(
氟甲基)
苯甲酸酯6b是通过一步法,使用K+-Kryptofix 2.2.2作为抗衡离子,
乙腈作为溶剂,在40-60°C下从3-
胆固醇[(4-
硝基苯磺酰基)氧甲基]
苯甲酸酯中制备的。产物通过HPLC分离,获得75%(衰变校正后)的放射
化学产率,放射
化学纯度超过90%,时间为30分钟(比活度为2000-2500 Ci/mmol)。在小鼠中的
生物分布研究表明,在肾上腺和卵巢中获得了较高的放射性靶/非靶比值。版权所有 © 2001 John Wiley & Sons, Ltd.