Syntheses and Stereochemical Revision of Pseudopterosin G−J Aglycon and Helioporin E
作者:Scott E. Lazerwith、Ted W. Johnson、E. J. Corey
DOI:10.1021/ol006192k
日期:2000.7.1
[GRAPHICS]Revised structures are proposed for pseudopterosin G-J aglycon and helioporin E.
A Direct and Efficient Stereocontrolled Synthetic Route to the Pseudopterosins, Potent Marine Antiinflammatory Agents
作者:E. J. Corey、Scott E. Lazerwith
DOI:10.1021/ja983041s
日期:1998.12.1
Described herein is a newsyntheticroute to pseudopterosin aglycone (3), a key intermediate for the synthesis of a group of antiinflammatory natural products including pseudopterosin A (1) and E (2). The pathway of synthesis starts with the abundant and inexpensive (S)-(−)-limonene and its long-known cyclic hydroboration product (4) and leads to the chiral hydroxy ketone 6. Conversion of 6 to 10 followed
本文描述了拟珊瑚素苷元 (3) 的新合成路线,拟珊瑚素苷元是合成包括拟珊瑚素 A (1) 和 E (2) 在内的一组抗炎天然产物的关键中间体。合成途径始于丰富且廉价的 (S)-(-)-柠檬烯及其久负盛名的环状硼氢化产物 (4),并生成手性羟基酮 6。6 转化为 10,然后进行新的芳香环化产生了 15,其经历了高度非对映选择性环化,以提供受保护的拟珊瑚素苷元 16。天然存在的拟珊瑚素如 1 和 2 很容易从这个关键中间体中获得。