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。
The synthesis of desepoxy‐tedanolide C was accomplished and provided experimental evidence on the configuration of tedanolide C. The reported chemical shifts and coupling constants point to a configuration different from the published structure and analogous to the structures of the other members of this family of natural products. The key step is a Kiyooka aldol protocol for the stereoselective synthesis
Designed Epothilones: Combinatorial Synthesis, Tubulin Assembly Properties, abd Cytotoxic Action against Taxol-Resistant Tumor Cells
作者:K. C. Nicolaou、Dionisios Vourloumis、Tianhu Li、Joaquin Pastor、Nicolas Winssinger、Yun He、Sacha Ninkovic、Francisco Sarabia、Hans Vallberg、Frank Roschangar、N. Paul King、M. Ray V. Finlay、Pareskevi Giannakakou、Pascal Verdier-Pinard、Ernest Hamel
DOI:10.1002/anie.199720971
日期:1997.10.17
A library of epothilone A and B analogues, which was constructed by solid‐phase combinatorial synthesis using SMART Microreactors and solution chemistry, was screened in two different tubulin binding assays. Selected compounds were subjected to cytotoxicity studies against a number of cell lines, including Taxol‐resistant cells. Important structure–activity relationship emerged from these studies, which sets the stage for further discoveries and developments in the anticancer field.