Dearomatization of Indole via Intramolecular [3 + 2] Cycloaddition: Access to the Pentacyclic Skeleton of<i>Strychons</i>Alkaloids
作者:Zhengshen Wang、Luxin Chen、Yuan Yao、Zhigang Liu、Jin-Ming Gao、Xuegong She、Huaiji Zheng
DOI:10.1021/acs.orglett.8b01720
日期:2018.8.3
polycyclic indoline-annulated normal to medium-size rings through dearomatization of indole via a tandem 1,2-acyloxy migration/intramolecular [3 + 2] cycloaddition process is described. The pentacyclic skeleton of strychnine could be synthesized via this tandem cycloaddition and a further Mannich reaction. This approach would provide a novel strategy to the synthesis of strychons alkaloids.
描述了一种通过串联的1,2-酰氧基迁移/分子内[3 + 2]环加成过程使吲哚脱芳香化来构建各种多取代的多环吲哚啉环化的中型至中型环的有效方法。士的宁的五环骨架可以通过这种串联环加成反应和进一步的曼尼希反应合成。这种方法将提供一种新的策略来合成拟苯丙酸杆菌生物碱。