作者:K. C. Nicolaou、S. Ninkovic、F. Sarabia、D. Vourloumis、Y. He、H. Vallberg、M. R. V. Finlay、Z. Yang
DOI:10.1021/ja971110h
日期:1997.8.1
The total syntheses of epothilones A (1) and B (2) and several analogues thereof are described. The reported strategy relies on a macrolactonization approach and features selective epoxidation of the macrocycle double bond in precursors 3 and 4 (Scheme 1), respectively, as well as high convergency and flexibility. Building blocks 9−12 and 15 were constructed by asymmetric processes and coupled via
描述了埃坡霉素 A (1) 和 B (2) 及其几种类似物的全合成。报道的策略依赖于大环内酯化方法,并分别具有前体 3 和 4 中大环双键的选择性环氧化(方案 1),以及高收敛性和灵活性。构建块 9-12 和 15 是通过不对称过程构建的,并通过 Wittig、羟醛和大环内酯化反应偶联,以相对较短的路线提供埃坡霉素及其几种类似物的基本骨架。利用通过立体选择性 Wittig 反应获得的中间体 14 及其与 SAMP 腙13 的 Enders 偶联(方案 8),