Ontology type: schema:ScholarlyArticle
1972-06
AUTHORSN. V. Borunova, L. Kh. Freidlin, L. I. Gvinter, T. Atabekov, V. A. Zamureenko, I. M. Kustanovich
ABSTRACTConclusionsThe addition of metallic lead and treatment with a solution of lead acetate changed the selectivity of the acticn of Ni-Al2O3 and Ni-ZnO catalysts in the hydrogenation of dienones. In the presence of a modified catalyst, hydrogen is preferentially added at the 3,4-double bond, while on an unmodified catalyst it is preferentially added at the 5,6-double bond.Intermediate enol formation (registered by deutero-exchange) shows that the change in the direction of the process is associated with a change in its mechanism. On the modified catalyst, 1,2-addition of hydrogen is reduced, and the 3,4-bond is saturated to a substantial degree by 1,4-addition of hydrogen to the C=C C=O group. More... »
PAGES1254-1257
http://scigraph.springernature.com/pub.10.1007/bf00854539
DOIhttp://dx.doi.org/10.1007/bf00854539
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