Enantioselective Synthesis of (−)-Exiguolide by Iterative Stereoselective Dioxinone-Directed Prins Cyclizations
作者:Erika A. Crane、Thomas P. Zabawa、Rebecca L. Farmer、Karl A. Scheidt
DOI:10.1002/anie.201102790
日期:2011.9.19
Three become one: The title compound can be prepared in 26 steps by employing a unified Prins cyclization strategy to construct both tetrahydropyran rings (see scheme). The route combines two similar dioxinone fragments and one aldehyde component to generate the core structure. (−)‐Exiguolide selectively inhibits the growth of A549 cancer cells at low concentrations; the triene side chain and the Z‐enoate
三合一:通过采用统一的 Prins 环化策略构建两个四氢吡喃环,可以通过 26 个步骤制备标题化合物(参见方案)。该路线结合了两个相似的二恶酮片段和一种醛成分来生成核心结构。 (−)-Exiguolide 在低浓度下选择性抑制 A549 癌细胞的生长;三烯侧链和Z-烯酸几何结构对于这种细胞毒性都是必需的。