In the oligomerization of butadiene with the catalyst composed of iron(III) acetylacetonate and triethylaluminum, the degree of digomerization and the structures of the oligomers were strongly affected by the addition of an electron donor as a catalyst component. When triphenylphosphine was added, linear dimers composed of 3-methylhepta-1, 4, 6-triene and n-octa-1, 3, 6-triene were formed, while the
Reaction of carbon dioxide with butadiene catalyzed by palladium–phosphine complexes was studied. When the reaction was carried out in certain polar, aprotic solvents, such as dimethylformamide (DMF), 2-ethylidene-5-hepten-4-olide was formed in about 5% yield by the incorporation of CO2 together with the formation of butadiene linear dimers. The main dimer was 1,3,7-octatriene. The ditertiary phosphines
The new chiral aminodiphosphinite ligands are readily prepared from chiral amino acids. These compounds were characterized by 13C and 31P NMR spectroscopy and their behaviour as homogeneous catalysts was investigated in the linear dimerization of butadiene.
新的手性氨基二亚膦酸酯配体易于从手性氨基酸制备。这些化合物通过13 C和31 P NMR光谱进行表征,并在丁二烯的线性二聚反应中研究了它们作为均相催化剂的行为。
Imidazolium salts and the use of these ionic liquids as a solvent and as a catalyst
申请人:CENTRE NATIONAL DE
LA RECHERCHE SCIENTIFIQUE (CNRS)
公开号:EP1201657B1
公开(公告)日:2004-05-06
Isomerization and cyclization of octatrienes
作者:Ernest A. Zuech、Donald L. Crain、Roger F. Kleinschmidt