Pd(OAc)2-Catalyzed Oxidative C−H/C−H Cross-Coupling of Electron-Deficient Polyfluoroarenes with Simple Arenes
摘要:
Pd(OAc)(2)-catalyzed intermolecular C-H/C-H cross-coupling reactions between electron-deficient polyfluoroarenes and simple arenes for the synthesis of fluorinated biaryls have been developed. Deuterium-labeling experiments suggested that C-H bond cleavage of the simple arenes rather than the polyfluoroarenes is involved in the rate-limiting step.
A Cooperative Rhodium/Secondary Phosphine Oxide [Rh/P(O)nBu2] Template for Catalytic Hydrodefluorination of Perfluoroarenes
作者:Wei-Chieh Chang、Helena Randel、Thomas Weyhermüller、Alexander A. Auer、Christophe Farès、Christophe Werlé
DOI:10.1002/anie.202219127
日期:——
high tolerance for challenging electron-donating functionalities and heterocycles. Mechanistic studies and a density functional theory study have identified a rhodium(I) dihydride as a catalytic species and the critical role of phosphineoxide as a cooperative fragment.
介绍了用于全氟芳烃催化加氢脱氟的[Rh/P(O) n Bu 2 ] 模板。除了具有吸电子功能的底物外,该系统还表现出对具有挑战性的供电子功能和杂环化合物的高度耐受性。机理研究和密度泛函理论研究已将二氢铑 (I) 确定为催化物质,并将氧化膦作为协同片段的关键作用。
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.