Brønsted acid-catalyzed asymmetric dearomatization of indolyl ynamides: Practical and enantioselective synthesis of polycyclic indolines
作者:Zhi-Xin Zhang、Xuan Wang、Jia-Tian Jiang、Jie Chen、Xin-Qi Zhu、Long-Wu Ye
DOI:10.1016/j.cclet.2022.06.070
日期:2023.3
efficient synthesis of valuable chiral polycyclic indolines. However, these reactions have been mostly limited to transition-metal catalysts, and the related chiral Brønsted acid catalysis has been scarcely reported. Herein, we disclose a chiral phosphoric acid-catalyzed asymmetric dearomatization of indolyl ynamides by direct activation of alkynes. This metal-free method enables the practical and atom-economical