Bioinspired Network Analysis Enabled Divergent Syntheses and Structure Revision of Pentacyclic Cytochalasans
作者:Hai Wu、Yiming Ding、Kun Hu、Xianwen Long、Chunlei Qu、Pema‐Tenzin Puno、Jun Deng
DOI:10.1002/anie.202102831
日期:2021.7.12
The key steps of the syntheses include transannular alkene/epoxyalkene and carbonyl-ene cyclizations to establish the C/D ring of pentacyclic aspochalasans. Our bioinspired approach to these pentacyclic cytochalasans validate the proposedbiosynthetic speculation from a chemical view and provide a platform for the synthesis of more than 400 valuable cytochalasans bearing different macrocycles and amino-acid
The first total syntheses of the cytochalasan dimers asperchalasines A, D, E, and H have been accomplished. The key steps of the synthesis include a highly stereoselective intermolecular Diels–Alder reaction and a Horner–Wadsworth–Emmons macrocyclization to establish the key monomer aspochalasin B, and an intermolecular Diels–Alder reaction followed by a biomimetic oxidative heterodimerization by 5+2
Biosynthetically Inspired Divergent Syntheses of Merocytochalasans
作者:Xianwen Long、Hai Wu、Yiming Ding、Chunlei Qu、Jun Deng
DOI:10.1016/j.chempr.2020.11.010
日期:2021.1
intriguing structures and anti-cancer activity. They stem from unique biosynthetic pathways that lead to the incorporation of epicoccine and aspochalasin D motifs. A concise, scalable, and divergent synthetic route is needed to enable the preparation of sufficient quantities of merocytochalasan derivatives for biological studies. Here, we report a bioinspired modular syntheses of a suite of merocytochalasans
作者:Julius R. Reyes、Nils Winter、Lukas Spessert、Dirk Trauner
DOI:10.1002/anie.201809703
日期:2018.11.19
The cytochalasans are a large family of polyketide natural products with potent bioactivities. Amongst them, the aspochalasins show particularly intricate and fascinating structures. To gain insight into their structural diversity and innate reactivity, we have developed a rapid synthesis of aspochalasin D, the central member of the family. It proceeded in 13 steps starting from divinyl carbinol and
细胞松弛聚糖是一大类具有强大生物活性的聚酮化合物天然产物。其中,阿波松弛素表现出特别复杂和迷人的结构。为了深入了解其结构多样性和固有反应性,我们开发了该家族的核心成员 Aspochalasin D 的快速合成方法。它从二乙烯基甲醇开始,分 13 个步骤进行,并利用具有高区域选择性和立体选择性的高压 Diels-Alder 反应。到目前为止,我们的工作已经完成了曲霉素 PZ(一种复杂的五环阿波查拉桑)的仿生合成。
Collective total syntheses of cytochalasans and merocytochalasans