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8332166 
Journal Article 
Dehydrogenation of Benzyl Alcohols with t-Butylperoxocobalt (III) Schiff Base Complexes 
Nishinaga, A; Sugimoto, I; Matsuura, T 
1988 
1 
Nippon Kagaku Kaishi
ISSN: 0369-4577
EISSN: 2185-0925 
1988 
4 
495-499 
English 
Cobalt Schiff base complexes, which can function as models for dioxygenases as well as monooxygenases depending on the reaction medium, are now found to catalyze the dehydrogenation of p-substituted benzyl alcohols to give the corresponding benzaldehydes when p-butyl hydroperoxide is used as an oxidant. Catalytically active species is (t-BuOO)CoIII(L) (L = Schiff base ligand). The reactivity of the peroxo complex depends on the coordination number: a five coordinate peroxo cobalt(H) complex (coordinately unsaturated) shows high reactivity but self-decomposition competes with the dehydrogenation of the substrate, whereas the reactivity of coordinately saturated peroxo complexes is low but the selectivity of the dehydrogenation is high. Since no dehydrogenation of dibenzyl ether takes place with the present peroxo complex, the interaction between the hydroxyl group in the alcohol substrate and the peroxo complex may be important for the present dehydrogenation reactions. © 1988, The Chemical Society of Japan. All rights reserved.