Total Enantioselective Synthesis of the Endophytic Fungal Polyketide Phomolide H and Its Structural Revision
作者:James McNulty、David McLeod
DOI:10.1002/ejoc.201601172
日期:2017.1.3
A totalsynthesis of the proposed structure of the natural polyketide-macrolactone phomolide H 2 has been achieved following a bidirectional strategy from l-tartaric acid. The originally assigned structure of phomolide H displayed discordant NMR spectroscopic data in comparison with synthetic 2. The synthetic strategy was extended to prepare diastereomers and epimeric methyl-ethers of the natural product
遵循 L-酒石酸的双向策略,已实现天然聚酮化合物-大环内酯 phomolide H 2 的拟议结构的全合成。与合成 2 相比,最初指定的 phomolide H 的结构显示出不一致的 NMR 光谱数据。 合成策略扩展到制备天然产物的非对映异构体和差向异构甲基醚,其结构分析显示天然产物与非对映异构体 27 匹配. 介绍了 pomolide H 从 2 到化合物 27 的甲醇溶剂化物的结构修正。
First stereoselective total synthesis of Phomolide G and H via RCM protocol
A firsttotal synthetic route has been reported for the synthesis of Phomolide G and H. The syntheses of fragments were initiated from commercially available and inexpensive starting material (R)-epichlorohydrin. The synthesis involves a key Sharpless epoxidation, stereoselective epoxide opening, lactonization and ring closing metathesis (RCM).