Regioselective C-2 or C-5 Direct Arylation of Pyrroles with Aryl Bromides using a Ligand-Free Palladium Catalyst
作者:Julien Roger、Henri Doucet
DOI:10.1002/adsc.200900196
日期:——
acetyl or ester at the C-2 position of the pyrrole is tolerated. This environmentally attractive procedure has also been found to be tolerant to a very wide variety of functional groups on the arylbromides such as formyl, acetyl, propionyl, ester, nitrile, nitro, fluoro, methoxy, amino or trifluoromethyl.
<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 Arylation: Selective Palladium-Catalyzed C2-Arylation of <i>N</i>-Substituted Indoles
作者:Benjamin S. Lane、Dalibor Sames
DOI:10.1021/ol0490072
日期:2004.8.1
We present a new, practical method by which N-substituted indoles may be selectively arylated in the C2-position with good yields, low catalyst loadings, and a high degree of functional group tolerance. Our investigation found that two competitive processes, namely, the desired cross-coupling and biphenyl formation, were operative in this reaction. A simple kinetic model was formulated that proved
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.
Mild and selective base-free C–H arylation of heteroarenes: experiment and computation
作者:Hannes P. L. Gemoets、Indrek Kalvet、Alexander V. Nyuchev、Nico Erdmann、Volker Hessel、Franziska Schoenebeck、Timothy Noël
DOI:10.1039/c6sc02595a
日期:——
A mild and selective C–Harylation strategy for indoles, benzofurans and benzothiophenes is described. The arylation method engages aryldiazonium salts as arylating reagents in equimolar amounts. The protocol is operationally simple, base free, moisture tolerant and air tolerant. It utilizes low palladium loadings (0.5 to 2.0 mol% Pd), short reaction times, green solvents (EtOAc/2-MeTHF or MeOH) and