Aryl triflates: useful coupling partners for the direct arylation of heteroaryl derivatives via Pd-catalyzed C–H activation–functionalization
作者:Julien Roger、Henri Doucet
DOI:10.1039/b715235c
日期:——
Aryl triflates were found to be suitable partners for the palladium catalyzed directarylation of heteroaromatics via C-H activation-functionalization. The reaction conditions and the catalyst have a determining influence on the yields. The system combining PPh3 and Pd(OAc)2 using KOAc as base and DMF as solvent promotes the selective 2- or 5-arylations in moderate to high yields. Several heteroaromatics
bisphosphine monochelation to transition metals under conditions where homogeneousligands may form bischelated single metal complexes or multinuclear complexes. PS-DPPBz showed high ligand performance in first-row transition metal catalysis, enabling challenging molecular transformations that were not possible through the screening of existing homogeneousligands. In the Ni-catalyzed amination of aryl