Total Synthesis of (+)-18-<i>epi</i>-Latrunculol A: Development of a Synthetic Route
作者:Brett D. Williams、Amos B. Smith
DOI:10.1021/jo501733m
日期:2014.10.3
The evolution of an enantioselective totalsynthesis of (+)-18-epi-latrunculol A, a congener of the marine-sponge-derived latrunculins A and B, is reported. Key steps include a late-stage Mitsunobu macrolactonization to construct the 16-membered macrolactone, a mild Carreira alkynylation to unite the northern and southern hemispheres, a diastereoselective, acid-mediated δ-hydroxy enone cyclization/equilibration
报告了 (+)-18- epi -latrunculol A(海洋海绵衍生的 latrunculins A 和 B 的同系物)的对映选择性全合成的演变。关键步骤包括后期 Mitsunobu 大环内酯化以构建 16 元大环内酯、温和的 Carreira 炔基化以统一北半球和南半球、非对映选择性、酸介导的 δ-羟基烯酮环化/平衡序列,以及功能组-耐受交叉复分解以获得烯酮环化前体。