Gold-Catalyzed Intramolecular Tandem Cyclization of Indole-Ynamides: Diastereoselective Synthesis of Spirocyclic Pyrrolidinoindolines
作者:Nan Zheng、Yuan-Yuan Chang、Li-Jie Zhang、Jian-Xian Gong、Zhen Yang
DOI:10.1002/asia.201500865
日期:2016.2
A gold‐catalyzed intramoleculartandemcyclization of indole‐ynamide affords tetracyclic spirocyclicpyrrolidinoindoline bearing an all‐carbon quaternary stereocentre in a single step; however, when the reaction was carried out in the presence of BF3⋅Et2O, the corresponding tricyclic spirocyclicpyrrolidinoindoline‐based enones are produced through a key 1,5‐hydride shift. The developed chemistry provides