A concise synthesis of an intermediate of lactimidomycin, a glutarimide-containing macrocyclic polyketide produced by an actinomycete, has been accomplished in 35% overall yield from a known vinylketene silyl N,O-acetal by a 10-step sequence that involves two types of asymmetric aldol reactions to install all the stereocenters, the Stille coupling to set up the whole carbon famework, and the Yamaguchi lactonization to construct the 12-membered macrolactone ring.
A concise synthesis of an intermediate of lactimidomycin, a glutarimide-containing macrocyclic polyketide produced by an actinomycete, has been accomplished in 35% overall yield from a known vinylketene silyl N,O-acetal by a 10-step sequence that involves two types of asymmetric aldol reactions to install all the stereocenters, the Stille coupling to set up the whole carbon famework, and the Yamaguchi lactonization to construct the 12-membered macrolactone ring.
Development of the Synthesis of Desepoxy-Tedanolide C
作者:Daniel Lücke、Markus Kalesse
DOI:10.1021/acs.joc.3c02437
日期:2024.2.16
We are presenting the development of our route for the total synthesis of desepoxy-tedanolide C. Through the obtained analytical data, the proposed structure of tedanolide C is questioned and a different configuration for this natural product is proposed. Key steps of the synthesis are a Kiyooka aldol reaction that builds up the tertiary alcohol flanked by three oxygenated carbon atoms and two aldol
我们正在介绍我们的去环氧-tedanolide C 全合成路线的开发。通过获得的分析数据,对 tedanolide C 的拟议结构提出了质疑,并提出了这种天然产物的不同构型。合成的关键步骤是 Kiyooka 羟醛反应,该反应生成侧翼有三个含氧碳原子的叔醇,以及两个用于片段偶联的羟醛反应。 Julia-Kocienski 烯化用于侧链的安装。除了成功的合成之外,还详细描述了西南半球保护基团设置的发展以及构建目标分子的另一种逆合成尝试。