Total Synthesis of Sporolide B and 9-<i>epi</i>-Sporolide B
作者:K. C. Nicolaou、Jianhua Wang、Yefeng Tang、Lorenzo Botta
DOI:10.1021/ja1048994
日期:2010.8.18
The total synthesis of the structurally unique secondary metabolite sporolide B (1b) is described. The total synthesis of 1b was developed on the basis of preliminary studies that revealed the reactivity of an appropriate o-quinone as a diene system toward a number of indene derivatives as dienophiles, first in intermolecular and thence intramolecular settings. Thus, substrates were devised (37 and
An ocean of discovery: The first totalsynthesis of the highly oxygenated, marine‐derived, natural product sporolideB has been achieved through a convergent strategy. The key steps involve a ruthenium‐catalyzed [2+2+2] cycloaddition to assemble the indene structural motif and a thermally induced Diels–Alder‐type reaction to forge the macrocycle (see scheme).
发现的海洋:通过收敛策略实现了高度含氧、海洋衍生的天然产物孢子内酯 B 的首次全合成。关键步骤包括钌催化的 [2+2+2] 环加成以组装茚结构基序和热诱导的 Diels-Alder 型反应以形成大环(见方案)。
Sporolide B: synthetic studies
作者:Jeffery A. Gladding、James P. Bacci、Scott A. Shaw、Amos B. Smith
DOI:10.1016/j.tet.2011.04.094
日期:2011.9
Studies directed toward the synthesis of the architecturally complex marine natural product sporolide B are described. Synthetic analysis suggested advanced hydroquinone and benzodiquinane fragments, which upon elaboration were successfully united via an ester linkage. Macrocyclization studies were then carried out, and although a novel macrocyclization product was obtained, subsequent studies revealed
描述了针对结构复杂的海洋天然产物孢子内酯 B 合成的研究。合成分析表明,先进的氢醌和苯二喹烷碎片在精心设计后通过酯键成功结合。然后进行了大环化研究,虽然获得了一种新的大环化产品,但随后的研究表明,C(6) 和 C(10) 处的叔羟基在空间上受阻,无法参与成功的大环化以提供孢子内酯 B。