An Iminium Ion Cascade Annulation Strategy for the Synthesis of Akuammiline Alkaloid Pentacyclic Core Structures
作者:Eric S. Andreansky、Simon B. Blakey
DOI:10.1021/acs.orglett.6b03406
日期:2016.12.16
The akuammiline alkaloids are a family of indole monoterpene natural products known for their polycyclic cage-like structures. An iminium ion cascade annulation approach was developed, simultaneously synthesizing both the C and D rings of these natural products by annulation onto a protected indole ring. This reaction allowed the synthesis of a key tetracyclic intermediate toward these natural products
akuammiline生物碱是一类吲哚单萜天然产物,以其多环笼状结构而闻名。开发了一种亚胺离子级联环化方法,同时通过环化到受保护的吲哚环上同时合成这些天然产物的C和D环。该反应允许合成针对这些天然产物的关键四环中间体。该四环化合物用于合成存在于诸如akuammiline和strictamine之类的生物碱中的五环甲氨基喹喔啉核以及在伪akuammigine中发现的五环呋喃二氢吲哚核。