Manganese-Catalyzed Direct Nucleophilic C(sp<sup>2</sup>)H Addition to Aldehydes and Nitriles
作者:Bingwei Zhou、Yuanyuan Hu、Congyang Wang
DOI:10.1002/anie.201506187
日期:2015.11.9
Herein, a manganese‐catalyzed nucleophilicaddition of inert C(sp2)H bonds to aldehydes and nitriles is disclosed by virtue of a dual activation strategy. The reactions feature mild reaction conditions, excellent regio‐ and stereoselectivity, and a wide substrate scope, which includes both aromatic and olefinic CH bonds, as well as a large variety of aldehydes and nitriles. Moreover, mechanistic studies
Palladium-Catalyzed Oxidative sp2 CH Bond Acylation with Aldehydes
作者:Olivier Baslé、Johan Bidange、Qi Shuai、Chao-Jun Li
DOI:10.1002/adsc.200900874
日期:——
An efficient method was developed for the direct acylation of arene sp2 CH bonds with aldehydes using palladium acetate as catalyst and peroxide as oxidant. The solvent‐free oxidativeacylation reaction assisted by a pyridine directing group provides an easy access to aromatic, aliphatic, and optical active ketones.
Palladium-Catalyzed Synthesis of Aromatic Ketones and Isoindolobenzimidazoles<i>via</i>Selective Aromatic CH Bond Acylation
作者:Juyou Lu、Hao Zhang、Xiaowu Chen、Hongxia Liu、Yuyang Jiang、Hua Fu
DOI:10.1002/adsc.201200743
日期:2013.1.9
A convenient and efficient palladium-catalyzed synthesis of aromatic ketones and isoindolobenzimidazoles has been developed via selective aromatic CH bond acylation. The protocol uses palladium acetate as the catalyst, readily available carboxylicacids as the acylating reagents, trifluoroacetic anhydride as the activated agent of the acids, and the corresponding aromatic ketones and isoindolobenzimidazoles
An acylation of arenes with aldehydesthrough dual C–H activations at room temperature is reported. The acylation was initiated by phenanthraquinone-catalyzed hydrogen atom transfer from aldehyde under visible light irradiation. The aldehyde-derived acyl radical merged with palladium-catalyzed activation of arenes to afford the cross coupling products.