A Unified Strategy for the Syntheses of the Isoquinolinium Alkaloids Berberine, Coptisine, and Jatrorrhizine
作者:Luis M. Mori-Quiroz、Sidnee L. Hedrick、Andrew R. De Los Santos、Michael D. Clift
DOI:10.1021/acs.orglett.8b01702
日期:2018.7.20
Total syntheses of the antibacterial alkaloids berberine, coptisine, and jatrorrhizine have been achieved in four steps through a unified route. The key step of this strategy is an efficient intramolecular Friedel–Crafts alkoxyalkylation which, following oxidation, establishes the isoquinolinium core of these natural products. Herein, the design and development of this synthetic strategy, which has
抗菌生物碱小ber碱,黄连碱和麻风树碱的总合成已通过一条统一的路线通过四个步骤完成。该策略的关键步骤是有效的分子内Friedel-Crafts烷氧基烷基化反应,该反应在氧化后建立了这些天然产物的异喹啉鎓核心。在本文中,描述了这种合成策略的设计和开发,该合成策略使得迄今报道的这些生物碱的最短和最有效的合成成为可能。