Development of a Kilogram-Scale Route for Clinical Sample Production of the Intravenous Anesthetic Cipepofol
作者:Xiaowei Zhang、Shuowen Yu、Zhaojun Liu、Yuanqiang Long、Jinwei Zhao、Wei Xu、Haifeng Zhang、Haijun Zhang
DOI:10.1021/acs.oprd.1c00306
日期:2022.4.15
clinical anesthetic for a few decades. Its derivative with a three-membered ring, Cipepofol, was found to be equally effective and with less side effects. Here, we report a process for the scale-up total synthesis of Cipepofol. It could be obtained in five steps from the commercially available 2-isopropylphenol. The key reactions involved Claisen rearrangement, Simmons–Smith cyclopropanation, and chiral
几十年来,异丙酚已被广泛用作临床麻醉剂。发现其具有三元环的衍生物Cipepofol具有同样的效果并且副作用较少。在这里,我们报告了Cipepofol的放大全合成过程. 它可以从市售的 2-异丙基苯酚分五步获得。关键反应包括 Claisen 重排、Simmons-Smith 环丙烷化和通过氨基甲酸酯形成/结晶的手性拆分,然后是水解和刮膜蒸馏。反应条件温和,所涉及的试剂易得。使用该工艺,最终产品的合成总产率为 14%,无需柱色谱纯化。该合成路线提供了一种更短、更稳定、更经济的公斤级西泊酚(化学纯度 > 99.5%,99.5% ee)生产。