Synthesis of 2-Aminopyrroles Via Metal-Free Annulation of Ynamides with 2<i>H</i>-Azirines
作者:Lianhong Jiao、Yanan Wang、Lixia Ding、Chaofeng Zhang、Xiao-Na Wang、Junbiao Chang
DOI:10.1021/acs.joc.2c02103
日期:2022.11.18
A novel metal-free annulation of ynamides with 2H-azirines catalyzed by BF3·Et2O is described, leading to the construction of polysubstituted 2-aminopyrroles in a facile, flexible, and atom-economical way. This synthetic strategy proceeds with efficiency, broad substrate scope, and short reaction time under mild reaction conditions. Furthermore, the obtained annulation products could be modified to
描述了由 BF 3 ·Et 2 O 催化的 ynamides 与 2 H-氮杂环丙烷的新型无金属环化,从而以简便、灵活且原子经济的方式构建多取代的 2-氨基吡咯。这种合成策略在温和的反应条件下具有高效、底物范围广和反应时间短的特点。此外,可以对获得的环化产物进行修改,以高产率生成多种 2-亚氨基吡咯框架。