F. Benvenuti et al., Telomerization of 1,3-butadiene with alcohols catalyzed by homogeneous palladium(0) complexes in the presence of mono- and diphosphine ligands, J MOL CAT A, 144(1), 1999, pp. 27-40
The homogeneous telomerization of 1,3-butadiene with alcohols for the selec
tive synthesis of linear octadienyl ethers in the presence of catalysts pre
pared in situ from palladium(0) bis-dibenzylidene-acetone and different mon
o- and diphosphine ancillary ligands is described. With monophosphines, a c
orrelation between basicity as well as steric hindrance of the ligand and a
ctivity and selectivity of the resulting catalyst was found. When diphosphi
nes were used, the effect of the bite of the chelating ligand, as well as i
ts basicity and steric hindrance on the activity and selectivity of the pro
cess was studied and discussed in terms of the relative stability of the me
tallacyclo moieties involved in the catalytic cycle. The above results have
allowed to gain more light on the reaction mechanism. (C) 1999 Elsevier Sc
ience B.V. All rights reserved.