Supported Palladium Nanoparticles Catalyzed Reductive Carbonylation of Nitroarenes to <i>N</i>
-Arylformamides
作者:Vandna Thakur、Ajay Kumar、Nishtha Sharma、Arun K. Shil、Pralay Das
DOI:10.1002/adsc.201700944
日期:2018.2.1
A facile reductive carbonylation reaction of nitroarenes to N‐arylformamide synthesis was investigated under polymer supported palladium (Pd@PS) nanoparticles catalyzed conditions. Dual role of oxalic acid dihydrate ((CO2H)2 ⋅ 2H2O) as H2 source for hydrogenation and CO source for carbonylation reaction for desired products synthesis was critically investigated under favorable DMF solvent conditions
6-Aroylated Phenanthridines via Base Promoted Homolytic Aromatic Substitution (BHAS)
作者:Dirk Leifert、Constantin Gabriel Daniliuc、Armido Studer
DOI:10.1021/ol403147v
日期:2013.12.20
2-isocyanobiphenyls react with aromatic aldehydes via base promoted homolytic aromatic substitution (BHAS) to give 6-aroylated phenanthridines. Reactions occur via addition of acylradicals to the isonitrile functionality and subsequent intramolecular BHAS of the intermediate imidoyl radicals. Initiation of the radicalchainreaction is best achieved with small amounts of FeCl3 (0.4 mol %), and the commercially
Visible-Light-Induced Decarboxylative Cyclization/Hydrogenation Cascade Reaction to Access Phenanthridin-6-yl(aryl)methanol by an Electron Donor–Acceptor Complex
作者:Wei Shi、Fang Ma、Pinhua Li、Lei Wang、Tao Miao
DOI:10.1021/acs.joc.0c01916
日期:2020.11.6
visible-light-induced decarboxylative cyclization/hydrogenation cascade reaction of α-oxocarboxylic acids and 2-isocyanobiaryls has been developed. Without the need of any external photosensitizer, oxidant, and reductant, this method offers a mild and green approach for the synthesis of diverse alcohols in moderate to good yields. A mechanism indicated that an electrondonor–acceptor complex-driven decarboxylation,
Radical Fluoroalkylation of Isocyanides with Fluorinated Sulfones by Visible-Light Photoredox Catalysis
作者:Jian Rong、Ling Deng、Ping Tan、Chuanfa Ni、Yucheng Gu、Jinbo Hu
DOI:10.1002/anie.201510533
日期:2016.2.18
visible‐light photoredox catalysis. A wide range of readily available mono‐, di‐, and trifluoromethyl heteroaryl sulfones can thus be used as efficient radical fluoroalkylation reagents under mild conditions. This method not only describes a new syntheticapplication of fluorinated sulfones, but also provides a new route to fluoroalkyl radicals.
Electrochemical initiation of electron-catalyzed phenanthridine synthesis by trifluoromethylation of isonitriles
作者:M. Lübbesmeyer、D. Leifert、H. Schäfer、A. Studer
DOI:10.1039/c7cc09302k
日期:——
The electron-catalyzed formation of phenanthridines starting from isonitriles initiated by an electrochemical reduction of the Togni reagent is presented. The required number of faradays per mole of starting material and the respective yields clearly show the catalytic character of the electron in this reaction. The mechanism is supported by cyclic voltammetry experiments.