Palladium‐Catalyzed Suzuki–Miyaura Cross‐Coupling of Various Aryl Halides Using
<i>ortho</i>
‐Alkyl‐Substituted Arylphosphanes and (
<i>ortho</i>
‐Alkylphenyl)alkylphosphanes under Microwave Heating
作者:Sauli Vuoti、Juho Autio、Minna Laitila、Matti Haukka、Jouni Pursiainen
DOI:10.1002/ejic.200700705
日期:2008.1
AbstractMono‐ and dinuclear palladium(II) chloride complexes of various ortho‐alkyl‐substituted aryl‐ and alkylphosphanes were prepared. Subsequently, these were characterized by 1H NMR and 31P1H} NMR spectroscopy, X‐ray crystallographic studies and mass spectroscopy. The palladium complexes were screened as potential catalysts for the microwave‐assisted Suzuki–Miyaura coupling reaction of several aryl halides under aerobic conditions. A preliminary study showed that excellent results can be obtained even for electron‐rich bromides and unactivated aryl chlorides with an optimized solvent, base and catalyst loading using specific phosphane ligands. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)