<i>In Situ</i>
Preparation of Palladium Nanoparticles for C‐2 Selective Arylation of Indoles in Agro‐Waste Extract Based Mixed Solvents
作者:Yajun Sun、Rui Wang、Tianxiang Liu、Weiwei Jin、Bin Wang、Yonghong Zhang、Yu Xia、Chenjiang Liu
DOI:10.1002/ejoc.202100331
日期:2021.5.7
An in situ generation of palladiumnanoparticle catalyzed direct C−H arylation of indoles with iodoarenes for the synthesis of 2‐arylindoles in bio‐basedmixedsolvents is described.
Direct C–H bond activation: palladium-on-carbon as a reusable heterogeneous catalyst for C-2 arylation of indoles with arylboronic acids
作者:Prantika Bhattacharjee、Purna K Boruah、Manash R Das、Utpal Bora
DOI:10.1039/d0nj00735h
日期:——
functionalization of indoles with arylboronic acids is achieved using palladium supported on carbon as a reusableheterogeneouscatalyst in the presence of an oxidant under mild conditions. The current protocol formed exclusive C-2 selective products without the aid of any ligand or directing group. The catalyst is reusable for up to four catalytic cycles with the retention of catalytic efficiency.
A visible-light induced green and efficient method is developed for the synthesis of α-indolyl diethyl malonates. The reaction proceeds without any photocatalysts or ligands in a green solvent in a short time. Moreover, the reaction mechanism has been clearly studied by control experiments, spectrophotometric studies and density functional theory (DFT) calculations. The results showed that the photocatalyst-free