A novel method for stereospecific fluorination at the 2′-arabino-position of pyrimidine nucleoside: synthesis of [18F]-FMAU
作者:Nashaat Turkman、Juri G. Gelovani、Mian M. Alauddin
DOI:10.1002/jlcr.1797
日期:2010.11
produced the desired [18F]FMAU. The average radiochemical yield was 2.0% (decay corrected, n=6), from the end of bombardment. Radiochemical purity was >99%, and specific activity was >1800 mCi/µmol. Synthesis time was 95–100 min from the end of bombardment. This direct fluorination is a novel method for synthesis of [18F]FMAU, and the method should be suitable for production of other 5-substituted pyrimidine
嘧啶核苷在 2'-阿拉伯位置的直接氟化被认为是极其困难的,如果不是不可能的话。2'-deoxy-2'-fluoro-5-methy-1-β-D-arabinofuranosyluracil (FMAU) 及其 5-取代类似物的常规合成涉及 1,3,5-tri-O-苯甲酰基的立体定向氟化-α-D-呋喃核糖-2-磺酸酯,然后在 C1 位进行溴化,然后与嘧啶-双-三甲基甲硅烷基醚偶联。根据这种方法开发了几种放射性标记的核苷类似物,包括 [ 18 F] FMAU 和其他 5 取代的类似物。然而,使用这种多步骤方法常规生产这些化合物是不方便的并且限制了它们的临床应用。我们开发了一种新的前体和方法,用于在 2'-阿拉伯位置直接氟化预先形成的核苷类似物,通过[18F]FMAU的放射合成举例说明。2'-methylsulfonyl-3',5'-O-tetrahydropyranyl-N3-Boc-5-me