Second Generation Total Synthesis of (–)‐Preussochromone D
作者:Eric Kerste、Marc Paul Beller、Ulrich Koert
DOI:10.1002/ejoc.202000465
日期:2020.6.30
acetals to chromenone‐based substrates on multigram‐scale has been achieved. The introduced conjugate addition shortens the totalsynthesis of (–)‐preussochromone D and establishes a robust entry for further investigations towards the totalsynthesis of preussochromone E and F.
The methoxycarbonylalkylation and methoxycarbonylalkylidenation of silyl enol ethers
作者:Ian Fleming、Javed Iqbal
DOI:10.1016/s0040-4039(00)81397-0
日期:1983.1
Silyl enolethers (1) react with the phenylthio(methoxycarbonyl)alkyl chlorides (2) in the presence of Lewis acids to give good yields of the γ-ketoesters (3); oxidative and reductive desulphurisations give the saturated (4) and unsaturated (5 or 6) γ-keto esters, respectively.
Preussochromone Puzzle: Structural Revision of Preussochromones E and F by Total Synthesis
作者:Marc Paul Beller、Sergei Ivlev、Ulrich Koert
DOI:10.1021/acs.orglett.1c04261
日期:2022.1.28
A stereoselective synthesis of the proposed and actual structures of the natural products preussochromones E and F is reported. The key step is a ring-closing metathesis to close the five-membered ring and install the trans configuration of the annulated five–six ring system. The analysis of the 3J NMR couplings of the isolated natural product with the synthesized compound revealed its real structure
报告了天然产物前色酮 E 和 F 的拟议结构和实际结构的立体选择性合成。关键步骤是闭环复分解以闭合五元环并安装环状五六环系统的反式构型。分离的天然产物与合成化合物的3 J NMR 偶联分析揭示了其具有顺式环化的真实结构,这也可以使用 vic-三羰基化合物的分子内羟醛反应合成。
Kennedy, Michael; McKervey, M. Anthony; Maguire, Anita R., Journal of the Chemical Society. Perkin transactions I, 1990, # 4, p. 1041 - 1045
作者:Kennedy, Michael、McKervey, M. Anthony、Maguire, Anita R.、Naughton, Sean