Palladium(II)-Catalyzed Oxidative Homo- and Cross-Coupling of Aryl <i>ortho</i>-sp² C–H Bonds of Anilides at Room Temperature

Abstract

The preparation of secondary 2,2′-bisanilides has been successfully achieved through an oxidative coupling of aryl ortho-sp2 C–H bonds of anilides in the presence of catalytic Pd(OAc)2 and K2S2O8 as an oxidant in MsOH/CF3CO2H (TFA) at room temperature (25 °C). The aromatic rings of anilides substituted by various electron-donating or electron-withdrawing groups are tolerant in these coupling reactions.