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Palladium dialkylphosphines

The reactivity of palladium complexes can be enhanced by using more electron-rich aryl-dialkylphosphines, or even trialkylphosphines. The most general method for performing the SM reactions, employing Pd2(dba)3 and Pt-Bu3, with aryl iodides. [Pg.166]

Further improvements in the latter class of ligands have been introduced by appropriate immobilization of well established aryl-dialkylphosphines on the suitable polymers. Buchwald and coworkers [140] have developed ligand 326 supported on the Merrifield s peptide resin 343. This forms the highly active palladium complex with Pd(OAc)2 or Pd2(dba)3, wide apphcable in several palladium-catalysed reactions including the SM reactions with unreactive aryl iodides, bromides and chlorides. Thus sterically demanded and deactivated bromo-p-xylene (344) and 2-tolylboronic acid (286) were reacted at 0.5 mol% of paUadium-loading to produce 2,5,2 -trimethyl biphenyl (345) in essentialy quantitative yield [140], respectively. Scheme 45. [Pg.181]

Palladium complexes are able to assist in the Z/ -isomerization and migration of a variety of olefins. Heteroatoms in the olefin and trialkyl- or dialkylphosphines as ligands for palladium support isomerization [134]. [Pg.405]

See other pages where Palladium dialkylphosphines is mentioned: [Pg.347]    [Pg.138]    [Pg.146]    [Pg.477]    [Pg.481]    [Pg.12]    [Pg.746]    [Pg.746]    [Pg.181]    [Pg.80]    [Pg.894]    [Pg.909]    [Pg.941]    [Pg.138]    [Pg.12]    [Pg.181]    [Pg.408]    [Pg.185]   
See also in sourсe #XX -- [ Pg.50 ]



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Dialkylphosphinates

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