An efficient synthesis of carbon-14-labeled 6-[2-(dimethylamino)ethyl]-14-(1-ethylpropyl)-5,6,7,8-tetrahydroindolo [2,1-α] [2,5]benzodiazocine-11-carboxylic acid using Curtius rearrangement reaction as a key step
作者:Andy Shiqiang Zhang、Jonathan Z. Ho、Matthew P. Braun
DOI:10.1002/jlcr.1842
日期:2011.3
Here we report an efficient synthesis of 14C-labeled 6-[2-(dimethylamino)ethyl]-14-(1-ethylpropyl)-5,6,7,8-tetrahydroindolo-[2,1-α][2,5]benzodiazocine-11-carboxylic acid (1) using the Curtius rearrangement as a key step. The synthesis was initiated by converting the unlabeled aryl carboxylic acid to an aryl amine via Curtius rearrangement reaction. The resulting aryl amine was then converted to an aryl iodide which was coupled with zinc [14C]cyanide to form an aryl [14C]nitrile. Subsequent hydrolysis yielded the 14C-labeled carboxylic acid [14C]-1. This overall process represents a mild and potentially general approach for conversion of unlabeled carboxylic acids to isotopically labeled carboxylic acids. Copyright © 2010 John Wiley & Sons, Ltd.
在此,我们报告了以柯蒂乌斯重排反应为关键步骤,高效合成 14C 标记的 6-[2-(二甲基氨基)乙基]-14-(1-乙基丙基)-5,6,7,8-四氢吲哚-[2,1-α][2,5]苯并二氮杂环辛-11-羧酸(1)的方法。合成的第一步是通过 Curtius 重排反应将未标记的芳基羧酸转化为芳基胺。然后将生成的芳基胺转化为芳基碘化物,再与[14C]氰化锌偶联生成芳基[14C]腈。随后进行水解,得到 14C 标记的羧酸 [14C]-1。整个过程是将未标记的羧酸转化为同位素标记的羧酸的一种温和且可能通用的方法。Copyright © 2010 John Wiley & Sons, Ltd. All Rights Reserved.