Conditions for the palladium-catalyzed directarylation of a wide range of heterocycles with aryl bromides are reported. Those conditions employ a stoichiometric ratio of both coupling partners, as well as a substoichiometric quantity of pivalicacid, which results in significantly faster reactions. An evaluation of the influence of the nature of the aryl halide has also been carried out.
Highly electron-poor Buchwald-type ligand: application for Pd-catalysed direct arylation of thiophene derivatives and theoretical consideration of the secondary Pd<sup>0</sup>–arene interaction
作者:Toshinobu Korenaga、Ryo Sasaki、Kazuaki Shimada
DOI:10.1039/c5dt01991e
日期:——
Highly electron-poor SPhos ligands stabilised the Pd complex by secondary Pd0–arene interaction.