H. Bricout et al., HOMOGENEOUS AND BIPHASIC NICKEL-CATALYZED ISOMERIZATION OF ALLYLIC ALCOHOLS, EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, (11), 1998, pp. 1739-1744
The nickel-catalyzed isomerization of geraniol and prenol in homogeneo
us and two-phase systems has been investigated. The best results in te
rms of activity and selectivity have been obtained in homogeneous syst
ems with a /1,4-bis(diphenylphosphanyl)butane/trifluoroacetic acid com
bination. Catalyst deactivation occurs in the course of the reaction o
wing to coordination of the formed aldehyde group to the nickel specie
s or as a result of protonolysis of hydrido- or (pi-allyl)nickel compl
exes.