800370-36-9Relevant academic research and scientific papers
Palladium(II) complexes of new OPN phosphine ligands and their application in homogeneously catalysed reactions of CO with alkenes or alkynes
Green, Melinda J.,Cavell, Kingsley J.,Edwards, Peter G.,Tooze, Robert P.,Skelton, Brian W.,White, Allan H.
, p. 3251 - 3260 (2007/10/03)
Palladium complexes of a series of functionalised phosphines bearing the OPN donor set [2-pyCH2P(Ph)CH2-(CHOCH2CH 2CH2), 1; 2-py CH2P(Ph)-CH2CH 2(CHOCH2CH2O), 2; 2-pyCH2P(Ph) CH2CH2CO2Me, 3; 2-pyP(Ph)CH 2(CHOCH2CH2-CH2), 4; 2-py = 2-pyridyl] have been prepared and characterised. Ligands 1-3 form five membered P-N chelates which is confirmed for PdCl2 complexes of 1 and 3 by X-ray crystallography. O-coordination appears to be generally disfavoured although there is evidence of transient O-coordination for selected Pd complexes of 4. Palladium methyl and acetate complexes of all four ligands have been tested for catalytic activity in ethene/CO copolymerisation as well as alkoxy-carbonylation of propyne. Complexes of 1 and 4 show some activity in the copolymerisation reaction and complexes of 4 are active in the methoxy carbonylation of propyne. Unlike related pyridyl(diaryl)phosphines, 4 produces a much more stable catalyst system that does not require large excesses of ligand to maintain activity.
