Synthesis of Quaternary 3,3-Disubstituted 2-Oxindoles from 2-Substituted Indole Using Selectfluor
作者:Xiaojian Jiang、Junjie Yang、Feng Zhang、Pei Yu、Peng Yi、Yewei Sun、Yuqiang Wang
DOI:10.1021/acs.orglett.6b01367
日期:2016.7.1
A facile method to construct quaternary 3,3-disubstituted 2-oxindole from 2-substituted indole without a catalyst in mild conditions is developed. A mechanistic study suggests that an iminium-intermediate-triggered 1,2-rearrangement is involved, and a trace amount of water is required for subsequent oxidation.
An interrupted Heyns rearrangement approach for the regioselective synthesis of acylindoles
作者:Minakshi Altia、Pazhamalai Anbarasan
DOI:10.1039/d3cc04144a
日期:——
An efficient and general method for the synthesis of 2- and 3-acylindoles has been achieved with high regioselectivity from o-acylanilines and α-hydroxycarbonyl or its equivalent. The strategy involves the intramolecular trapping of an in situ generated aminoenol intermediate and an interrupted Heyns rearrangement pathway, followed by aromatization or rearrangement/aromatization. Important features