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。