22038-69-3Relevant academic research and scientific papers
Nickel(0) and palladium(0) complexes with 1,3,5-triaza-7-phosphaadamantane. Catalysis of buta-1,3-diene oligomerization or telomerization in an aqueous biphasic system
Cermak, Jan,Kvicalova, Magdalena,Blechta, Vratislav
, p. 355 - 363 (2007/10/03)
New homoleptic nickel(0) and palladium(0) complexes with a water-soluble ligand, 1,3,5-triaza-7-phosphaadamantane, were prepared and characterized by 1H, 13C, and 31P NMR spectra. The complexes, together with the known ana
Interaction of vinylpyridines with 1,3-dienes catalyzed by transition metal complexes
Selimov, F. A.,Ptashko, O. A.,Fatykhov, A. A.,Khalikova, N. R.,Dzhemilev, U. M.
, p. 872 - 878 (2007/10/02)
The linear and cyclic cooligomerization of 2-vinyl-, 2-methyl-5-vinyl-, and 4-vinylpyridines with 1,3-dienes and trienes catalyzed by complexes of transition metals (Fe, Co, Ni, Mn, Cr, Pd, Ru, Rh, and Zr) was carried out to give unsaturated pyridines containing alkenyl and cycloalkenyl substituents.
DIMERISATION DE DIENES CONJUGUES A L'AIDE DE COMPLEXES DU NICKEL EN PRESENCE DE LIGANDS DE TYPE AMINOPHOSPHINITE ETUDE D'OPTIMISATION
Masotti, Henriette,Pfeiffer, Gilbert,Siv, Chhan,Courbis, Pierre,Sergent, Michelle,Phan TAN LUU, Roger
, p. 63 - 77 (2007/10/02)
New chiral aminophosphinite ligands are readily prepared and their behaviour as homogeneous catalysts was investigated in the linear dimerization of butadiene and isoprene.This latter reaction has been optimised using experimental research methodology, leading to a conversion rate above 50percent.
Change of Selectivity in Catalytic Multicomponent Systems via Concentrations, Control of Metal-Catalyzed Reactions, Part XIII
Bartik, Tamas,Behler, Ansgar,Heimbach, Paul,Ndalut, Paulo,Sebastian, Joerg,Sturm, Harald
, p. 1529 - 1535 (2007/10/02)
By applying the method of inverse titration the influence of increasing concentrations of added effectors to organic and metalorganic chemical systems on the product selectivity can easily be identified.To a Wittig-type system we added LiI (change of stereoselectivity) and also triphenylphosphanoxide (removal of salt-effect).To a catalytic Ni(0)/butadiene system we added triphenylphosphite and then morpholine and vice versa.Ni:P(OC6H5)3:morpholine in a ratio 1:1:0.1 yields more than 90percent cyclodimers but in a ratio 1:0.1:20 more than 90percent n-octa-1,3,6-trienes.The co- oligomerisation of two butadienes with one 2,5-dimethyl-3-aza-hex-3-en in the system Ni/triphenylphosphane/butadiene/Schiff base/toluene/effector (1:1:66:33:66: ca. 0.1) leads - within the 2:1-cooligomers - by adding di-n-propyl-borane to a pure octadienylated Schiff base 11 or by adding morpholine largely to an octatrienylated amine 12 (ca. 85percent 12 and ca. 15percent 11). - Key words: Inverse Titration, Wittig Reactions, Butadiene/Schiff Base
Ligand-Assisted Catalysis: New Active and Selective Nickel Modified Homogeneous Catalysts for Linear Dimerization of Butadiene
Denis, Philippe,Mortreux, Andre,Petit, Francis,Buono, Gerard,Peiffer, Gilbert
, p. 5274 - 5276 (2007/10/02)
New aminophosphinite-modified Ni(0) catalysts have been found to be the most active ever described for linear dimerization of butadiene, affording almost exclusively 1,3,6- and 2,4,6-octatrienes, according to the reaction conditions.
