Asymmetric synthesis of pyrrolo[2,3–b]indole scaffolds by organocatalytic [3 + 2] dearomative annulation
作者:Heng-Zhi Tian、Sheng-Feng Wu、Guo-Qiang Lin、Xing-Wen Sun
DOI:10.1016/j.tetlet.2022.153969
日期:2022.8
An organocatalytic approach for the stereoselectivesynthesis of pyrrolo[2,3–b]indoles is presented. The developed methodology is based on the [3 + 2] dearomative annulation reaction between 3-nitroindoles and fumaric acid amide esters. Products bearing three adjacent stereogenic centers, one being quaternary, were formed with excellent yields, good diastereoselectivities and decent enantioselectivities
提出了一种立体选择性合成吡咯并[2,3- b ]吲哚的有机催化方法。开发的方法基于 3-硝基吲哚和富马酸酰胺酯之间的 [3 + 2] 脱芳环反应。具有三个相邻立体中心(一个是四元中心)的产物以优异的收率、良好的非对映选择性和良好的对映选择性形成。