calculations of a variety of lithium-chelating models. The highly functionalized intermediates obtained in this strategy were successfully employed for the diastereoselective total synthesis of (±)-basiliolide B and (±)-epi-8-basiliolide B. The decalin core with a lactone bridge was constructed via a 2-pyrone Diels–Alder (DA) cycloaddition, and the unprecedented seven-membered acyl ketene acetal was established
使用
环丙烷开环策略,通过立体选择性地建立了basaliolide / transtaganolide家族的C8和C9立体中心,该中心已通过DFT计算各种
锂螯合模型进行了研究。在此策略中得到的高功能化的中间体成功地用于(±)-basiliolide B和(±)的非对映全合成-外延与内酯桥的十氢化
萘芯经由-2-
吡喃酮狄尔斯构造-8- basiliolide B. -Alder(
DA)环加成反应,以及前所未有的七元酰基
乙烯酮缩醛通过仿生分子内O酰化环化反应而建立。