作者:Sheng-Wei Yang、Chun-Meng Wang、Kai-Xiang Tang、Jin-Xin Wang、Li-Ping Sun
DOI:10.1002/ejoc.201501560
日期:2016.2
A new approach for the total synthesis of ammosamide B was realized. The strategy is based on an intermolecular Pd-catalyzed N-arylation of 4-chloro-1-methylindoline-2,3-dione (2), which enables construction of the key pyrroloquinoline skeleton precursor 6 within three steps in an overall yield of 80 %. The ammosamide B total synthesis is achieved in 12 simple transformations by starting from a commercially
实现了氨酰胺B全合成的新方法。该策略基于 4-氯-1-甲基二氢吲哚-2,3-二酮 (2) 的分子间 Pd 催化 N-芳基化,该策略能够在三步内构建关键的吡咯并喹啉骨架前体 6,总产率为 80 %。氨酰胺 B 的全合成通过 12 次简单的转化实现,从市售原料开始,总产率为 23%。此外,关键前体 6 是合成其他含吡咯并喹啉的天然产物的重要中间体。