We present an allylic polyfluoroarylation reaction with broad substrate scope and excellent functional group tolerance, using organozinc reagents under mild conditions. A catalytic amount of triphenylphosphine oxide efficiently promotes iodine-zinc exchange reaction between polyfluoroaryl iodide and dimethylzinc, and the resulting phosphine oxide-activated polyfluoroarylzinc undergoes substitution reaction with allylic halides to afford the corresponding polyfluoroarylated products. (C) 2015 Elsevier Ltd. All rights reserved.
Copper- and Phosphine-Ligand-Free Palladium-Catalyzed Direct Allylation of Electron-Deficient Polyfluoroarenes with Allylic Chlorides
作者:Yan-Bo Yu、Shilu Fan、Xingang Zhang
DOI:10.1002/chem.201202824
日期:2012.11.12
copper‐ and phosphine‐ligand‐free Pd‐catalyzed directallylation of electron‐deficient polyfluoroarenes with allylicchlorides and the reaction mechanism are described (see scheme). The simple catalytic system, broad substrate scope, and excellent functional‐group compatibility of this protocol provides a useful and facile access to allylated polyfluoroarenes.