Synthesis of phthalic acid derivatives <i>via</i> Pd-catalyzed alkoxycarbonylation of aromatic C–H bonds with alkyl chloroformates
作者:Gang Liao、Hao-Ming Chen、Bing-Feng Shi
DOI:10.1039/c8cc06663a
日期:——
A Pd(II)-catalyzed alkoxycarbonylation of aromatic C–H bonds with alkylchloroformates has been developed. A broad range of benzamides and alkylchloroformates are compatible with this protocol. The reaction is operationally simple and scalable. The direct group could be readily removed to access substituted phthalic acid esters (PAEs), 1,2-dibenzyl alcohols and phthalamides. Besides alkoxycarbonylation
Nickel-Catalyzed Direct Alkylation of C–H Bonds in Benzamides and Acrylamides with Functionalized Alkyl Halides via Bidentate-Chelation Assistance
作者:Yoshinori Aihara、Naoto Chatani
DOI:10.1021/ja401344e
日期:2013.4.10
The alkylation of the ortho C-H bonds in benzamides and acrylamides containing an 8-aminoquinoline moiety as a bidentate directing group with unactivated alkylhalides using nickel complexes as catalysts is described. The reaction shows high functional group compatibility. In reactions of meta-substituted aromatic amides, the reaction proceeds in a highly selective manner at the less hindered C-H bond
Palladium-Catalyzed Site-Selective [5 + 1] Annulation of Aromatic Amides with Alkenes: Acceleration of β-Hydride Elimination by Maleic Anhydride from Palladacycle
use of maleic anhydride as a ligand. Computational analyses suggest that the coordination of the maleic anhydride ligand highly stabilizes the transition state for β-hydride elimination and accelerates the β-hydride elimination.