Synthesis of polycyclic spiro-fused indolines via IBX-mediated cascade cyclization
作者:Zhiguo Zhang、Xiaoqing Song、Guofeng Li、Xiang Li、Dan Zheng、Xuna Zhao、Huanran Miao、Guisheng Zhang、Lantao Liu
DOI:10.1016/j.cclet.2020.11.001
日期:2021.4
We report a 2-iodoxybenzoic acid (IBX)-mediated intarmolecular oxidative spiro-fused tandem cyclization reaction of tryptophan analogs bearing an N-arylamides side-chain to rapidly afford polycyclic spiroindolines featuring multiple stereocenters including a quaternary stereocenters under mild reaction conditions. Among them, a novelty azaphosphol idine-containing spiroindoline compound is synthesized