描述了一种基于新开发的N-溴代琥珀酰亚胺(NBS)诱导的环异构化的方案,该方案可从简单的含有吲哚单元的β-烯胺酸酯或β-烯胺酮制备三环azepino [4,5- b ]吲哚。提出了一种涉及Pictet-Spengler环化,氮丙啶环形成和区域选择性C–N键裂解的机制,以说明中等大小的环形成和吸电子基团(酯,酮)的迁移。
Azepinoindole Synthesis via a <i>N</i>-Bromosuccinimide-Induced Cycloisomerization of Enaminoester/Enaminone
作者:Lina Chang、Tao Guo、Ziyi Wang、Shaozhong Wang、Zhu-Jun Yao
DOI:10.1021/acs.joc.6b02760
日期:2017.2.3
β-enaminoesters or β-enaminones containing an indole unit. A mechanism involving a Pictet–Spengler cyclization, an aziridine ring formation, and a regioselective C–N bond cleavage was proposed to account for the medium-sized ring formation and the migration of electron-withdrawing group (ester, ketone).
描述了一种基于新开发的N-溴代琥珀酰亚胺(NBS)诱导的环异构化的方案,该方案可从简单的含有吲哚单元的β-烯胺酸酯或β-烯胺酮制备三环azepino [4,5- b ]吲哚。提出了一种涉及Pictet-Spengler环化,氮丙啶环形成和区域选择性C–N键裂解的机制,以说明中等大小的环形成和吸电子基团(酯,酮)的迁移。