Carbon‐14 radiosynthesis of combretastatin A‐1 (CA1) and its corresponding phosphate prodrug (CA1P)
作者:Rodney T. Brown、Victor L. Murrell、Austin McMordie、Madhavi Sriram、Kevin G. Pinney、Suman Sharma、David J. Chaplin
DOI:10.1002/jlcr.1676
日期:2009.12
The natural product combretastatin A-1 (CA1) is isolated from the African bush willow tree, a member of the Combretaceae family. CA1 has important medicinal value, due in part to its ability to inhibit tubulin assembly. The prodrug combretastatin A-1 diphosphate (CA1P; OXi4503) is currently in human Phase I clinical trials as a vascular disrupting agent. This paper describes the carbon-14 radiosynthesis
天然产物考布他汀 A-1 (CA1) 是从非洲灌木柳树中分离出来的,它是 Combretaceae 科的成员。CA1 具有重要的药用价值,部分原因在于它能够抑制微管蛋白组装。前药考布他汀 A-1 二磷酸(CA1P;OXi4503)目前作为血管破坏剂处于人体 I 期临床试验中。本文描述了 [4'-14C]CA1 和相应的磷酸盐前药盐 [4'-14C]CA1P 的高比活性 (55 mCi/mmol) 的碳 14 放射合成。在 [14C] 甲基碘的存在下,去除叔丁基二甲基甲硅烷基保护基团后,通过对 CA1 前体的 C-4' 保护的酚部分进行甲基化来引入碳 14 标记。这是以极好的收率实现的,而没有显着的 Z 到 E 异构化。[14C]-前体 ((Z)-1-[3',[4'-14C], 5'-三甲氧基苯基]-2-[2",3"-二-[(异丙基)氧基]-4"-甲氧基苯基]乙烯)与TiCl4进行去异丙基化