Oxidative Cyclization of Kynuramine and Ynones Enabling Collective Syntheses of Pyridoacridine Alkaloids
作者:Dongfang Jiang、Shaozhong Wang
DOI:10.1021/acs.joc.1c02009
日期:2021.11.5
A cerium(III)-catalyzed oxidative cyclization of kynuramine and ynones has been reported as a key reaction in the total synthesis of marine pentacyclic pyridoacridine alkaloids featuring different ring connectivity patterns. The formation of tricyclic benzonaphthyridine rings was identified in the oxidative process. By combining with an intramolecular acylation and the chemoselective late-stage functionalization
据报道,铈 (III) 催化的犬尿胺和 ynones 的氧化环化是全合成具有不同环连接模式的海洋五环吡啶吖啶生物碱的关键反应。在氧化过程中确定了三环苯并萘啶环的形成。通过结合分子内酰化和吡啶环的化学选择性后期功能化,设计了 4-10 步的不同方法来完成生物碱脱甲基脱氧苯丙胺 ( 1 )、苯丙胺 ( 2 )、哌啶 ( 3 )、异环脒 ( ) 的合成。 4 ), N-甲基异囊胺 ( 5 ), N-羟甲基异囊胺 ( 6 )、9-羟基异酸胺 ( 7 )、新拉布宁 A ( 8 ) 和羽衣甘蓝 A ( 9 )。