Total Synthesis of Norsampsones A and B, Garcinielliptones N and O, and Hyperscabrin A
作者:Changwu Zheng、Xueying Wang、Wenwei Fu、Yue Lu、Hongsheng Tan、Hongxi Xu
DOI:10.1021/acs.jnatprod.8b00763
日期:2018.11.26
The asymmetric total synthesis of five decarbonyl polycyclic polyprenylated acylphloroglucinols norsampsnes A (3) and B (4), garcinielliptones O (5) and N (6), and hyperscabrin A (7) is described. The synthesis to construct the core substituted cyclohexanone ring of these natural products was achieved by a key Dieckmann condensation. The chirality of the molecules was introduced by the stereoselective
描述了五种脱羰多环多烯丙基化酰基间苯三酚降雪片碱A(3)和B(4),藤黄内酯O(5)和N(6)和高s素A(7)的不对称全合成。通过关键的Dieckmann缩合完成了构建这些天然产物的核心取代环己酮环的合成。分子的手性是通过用埃文斯的恶唑烷酮进行立体选择性烷基化而引入的。合成可以克级进行,通过DFT计算研究了Dieckmann缩合反应,以帮助提高藤黄素O的收率(5)。还确定了藤黄素O(5)和N(6)的绝对构型。