Reduction of Ethylenic Insaturations by in situ Generated Hydrogen
作者:Y. Fort、R. Vanderesse、P. Caubere
DOI:10.1246/cl.1988.757
日期:1988.5.5
Selective hydrogenation of carbon–carbon double bond can be easily performed by simultaneous addition of substrate and Me3SiCl or water to NiCRA. It is shown that it is possible to reduce dienes selectively in olefins and carbon–carbon double bond in the presence of carbonyl, ester or acid groups.
On the mechanism of the nickel-catalysed regioselective cyclodimerization of isoprene
作者:P.W.N.M. van Leeuwen、C.F. Roobeek
DOI:10.1016/s0040-4020(01)97949-9
日期:——
similar steric properties the changes in product distribution as a function of the electronic ligand parameter are explained in terms of a gradual change in HOMO-LUMO interactions between Ni and the olefins, with strong π-acidic ligands promoting the head-to-headcoupling of the isoprene molecules. The second step, involving reductive elimination of a cyclodimer from the metal, shows an increasing selectivity
作者:John L. Binder、Kenneth C. Eberly、George E. P. Smith
DOI:10.1002/pol.1959.1203813320
日期:1959.7
The cyclic C6 and C8 dimers of isoprene have been prepared by thermal dimerization and their physical and chemical properties obtained. The infrared spectra of these substances are also given and are used to confirm the structures deduced chemically.