Palladium-Catalyzed Arylation of C(sp2)–H Bonds and C(sp3)–H Bonds with 4-Amino-benzotriazole as the Bidentate Directing Group
作者:Chengqian Li、Zhuo Wang、Meina Jin、Zhiguang Song
DOI:10.1021/acs.joc.4c00329
日期:2024.5.17
The arylation of C(sp2)–H and C(sp3)–H bonds in carboxylic acids catalyzed by Pd(II) with 4-aminobentriazole as the directing group was investigated. In addition to activation of the C(sp2)–H bond, selectivearylation of alkyl carboxylic acids and amino acids in the β position can also be achieved. This strategy involved a 5,5-bicyclic Pd intermediate complex whose structure was determined by X-ray
Palladium-Catalyzed Ortho-Arylation of Benzamides via Direct sp<sup>2</sup>C–H Bond Activation
作者:Dan-Dan Li、Ting-Ting Yuan、Guan-Wu Wang
DOI:10.1021/jo300126n
日期:2012.4.6
The palladium-catalyzed ortho-arylation of benzamides by aryl iodides has been demonstrated with the simplest amide CONH2 as a directing group for the first time. This protocol can be applied to various benzamides and aryl iodides with both electron-donating and electron-withdrawing groups. In addition, the synthesized biphenyl-2-carboxamides can be further transformed to other biphenyl derivatives such as nitriles, carboxylic acids, carbamates, and amines.