Mechanistic Insights into the Pd-Catalyzed Direct Amination of Allyl Alcohols: Evidence for an Outer-Sphere Mechanism Involving a Palladium Hydride Intermediate
作者:Supaporn Sawadjoon、Per J. R. Sjöberg、Andreas Orthaber、Olle Matsson、Joseph S. M. Samec
DOI:10.1002/chem.201303431
日期:2014.2.3
The mechanism of directamination of allylalcohol by a palladium triphenylphosphite complex has been explored. Labelling studies show that the reaction proceeds through a π‐allylpalladium intermediate. A second‐order dependence of reaction rate on allylalcohol concentration was observed. Kinetic isotope effect studies and ESI‐MS studies are in agreement with a reaction proceeding through a palladium
isolated as products of the reactions of (PPh3)2PdCl2]2 or [(PPh3)PdCl2]2 with H2 in organic amines (Am). Similar products were obtained when (Ph3P)2Pd(Ph)Br was treated with H23 Both in amines and aromatic solvents. The reaction between H2 and [(PBu3)PdCl2]2 resulted in the formation of [(PBu3(PBu2)PdCl2 ·. 2 Am The kinetic data for H2 absorption by solutions of palladium(II) complexes are consistent