Selective 5-<i>exo-dig</i>Cyclization of<i>in Situ</i>Synthesized<i>N</i>-Boc-2-aminophenyl Ethoxyethynyl Carbenols: Synthesis of Multifunctional Indoles and Their Derivatives
N‐Boc‐ortho‐aminoaryl ketones and ethoxyacetylene through a cascade of reactions in a single operation that included a nucleophile‐triggered 5‐exo‐dig cyclization and an acid‐mediated 1,3‐allyl alcohol isomerization (1,3‐AAI) is described. A variety of aryl, vinyl and alkynyl groups can be introduced at C‐3 of indole‐2‐carboxaldehyde while having a high functional group compatibility. The 3‐alkynyl adducts, which
Electrosynthesis of
<i>ortho</i>
‐Amino Aryl Ketones by Aerobic Electrooxidative Cleavage of the C(2)=C(3)/C(2)−N Bonds of
<i>N</i>
‐Boc Indoles
作者:Jintao Wu、Zehui Peng、Tong Shen、Zhong‐Quan Liu
DOI:10.1002/adsc.202200256
日期:2022.8.2
strategies for oxidativecleavage of 2,3-double bond of substituted indoles generally suffered from usage of heavy metals, stoichiometric chemical oxidants or hash conditions. Herein, we reported an electrochemistry-driven aerobiccleavage of C(2)=C(3)/C(2)−N bonds of indoles. Through an undivided cell, various indoles and its derivatives can be converted into the corresponding ortho-amino aryl ketones. This