A methyl(phenyl)sulfane-promoted direct olefination of polyfluoroarenes catalyzed by palladium has been reported. With use of this new thioether ligand, a high reaction efficiency and excellent E/Z ratio of desired olefinated polyfluoroarenes were obtained. This represents a first example of thioether promoted oxidative Heck reaction.
Pd-catalyzed aerobic direct olefination of polyfluoroarenes
作者:Chun-Yang He、Feng-Ling Qing、Xingang Zhang
DOI:10.1016/j.tetlet.2014.03.096
日期:2014.4
The first example of Pd-catalyzed aerobic direct olefination of polyfluoroarenes has been developed. The reaction makes use of molecular O-2 as terminal oxidant, and provides a cost-efficient and environmentally benign access to polyfluoroarene-alkene structures that are of interest in life and material sciences. (C) 2014 Elsevier Ltd. All rights reserved.
Pd(OAc)<sub>2</sub> Catalyzed Olefination of Highly Electron-Deficient Perfluoroarenes
An efficient, Pd(OAc)(2) catalyzed method for direct olefination of highly electron-deficient perfluoroarenes was developed. The reaction scope includes a series of activated and nonactivated alkenes in moderate to high yields with moderate to high regio- and stereoselectivities.
Non‐Chelate‐Assisted Palladium‐Catalyzed Aerobic Oxidative Heck Reaction of Fluorobenzenes and Other Arenes: When Does the C−H Activation Need Help?
作者:Francisco Villalba、Ana C. Albéniz
DOI:10.1002/adsc.202100677
日期:2021.10.19
sole oxidant and no redox mediator. Arenes with either electron-donating or electron-withdrawing groups can be functionalized in this way. Experimental data on the reaction with toluene as the model arene shows that the C−Hactivation step is turnover limiting and that the ligand structure is crucial to facilitate the reaction, which supports the involvement of the pyridone fragment in the C−H activation