demonstrate that it is also possible to use allylic nickelcomplexes in combination with hfacac to produce linear octenes with a selectivity of 70% under very mild reaction conditions and at low catalyst concentrations. Additionally the catalyst can be formed simply by adding the activator hfacac to a solution of the allylic nickelcomplex. No complicated synthesis or purification is needed.
Maurel,R.; Pecque,M., Comptes Rendus des Seances de l'Academie des Sciences, Serie C: Sciences Chimiques, 1969, vol. 268, p. 568 - 570
作者:Maurel,R.、Pecque,M.
DOI:——
日期:——
Comparative Dimerization of 1-Butene with a Variety of Metal Catalysts, and the Investigation of a New Catalyst for CH Bond Activation
作者:Brooke L. Small、Roland Schmidt
DOI:10.1002/chem.200304945
日期:2004.2.20
The vanadium catalyst also produces substantial amounts of dienes and alkanes, suggesting a competing hydrogenation/dehydrogenation pathway that appears to involve vinyl Cbond;H bond activation. Nickelcatalysts are generally less selective than those based on iron or cobalt for making linear dimers, but they can make dimers with 60 % linearity. The major by-products for the nickel systems are trisubstituted