A simple, mild and versatile new tritium (3H) labelling method on a micro scale using sodium borotritide (NaB3H4) and a transition–metal complex catalyst is described. 3H-labelled compounds were prepared effectively by 3H hydrogenolysis of appendant functional groups in target compounds. The appendant functional group such as bromo, iodo or sulfonate in various target compounds can be replaced by tritium (3H) in moderate yields. The new method was established by optimization of the reaction conditions and examination of its applicability using four types of model substrates in tracer runs. Then, various drug candidates and ligands for drug discovery were labelled with tritium on a micro scale. The specific radioactivity of the 3H-labelled compounds used for the studies on receptor binding ranged from 12 to 20 Ci/mmol. Copyright © 2001 John Wiley & Sons, Ltd.
本文描述了一种简单、温和且通用的微量化氚(3H)标记方法,该方法使用氚化
硼氢化钠(NaB3H4)和过渡
金属配合物催化剂。通过目标化合物中附属官能团的3H氢解反应,有效制备了3H标记化合物。在不同目标化合物中的
溴、
碘或
磺酸等附属官能团,可以以适中的产率被氚(3H)取代。通过优化反应条件并使用四种模型底物进行示踪试验以检验其适用性,建立了新方法。然后,对多种药物候选物和药物发现中的
配体进行了微量化氚标记。用于受体结合研究的3H标记化合物的比放射性在12至20 Ci/mmol之间。版权所有 © 2001 John Wiley & Sons, Ltd.