Ruthenium-catalyzed aerobic oxidation of alcohols on zeolite-encapsulated cobalt salophen catalyst

Ágnes Zsigmond, Ferenc Notheisz, Gábor Csjernyik, Jan E. Bäckvall

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

A zeolite-encapsulated cobalt salophen catalysts was prepared by the intrazeolite ligand synthesis method and successfully applied in the aerobic oxidation of primary and secondary alcohols, e.g., cyclohexanol. Several advantages of the heterogenized catalyst was found in this system compared to the homogeneous counterpart, i.e., easy handling and better performance. The rate of the dioxygen uptake in the oxidation of benzyl alcohol in three different solvents, i.e., dichloromethane, benzene, and acetic acid, using CoSp-ZeY catalyst in the triple catalytic system, indicated that the reaction rate in different solvents does not differ too much. The encapsulated catalyst (CoSp-ZeY) was active in the oxidation of secondary alcohols. The reaction rate was lower than in the case of primary alcohols, which is caused by the different reactivity of the substrates. In the homogeneous system, sterically hindered alcohols, e.g., menthol or borneol, could also be oxidized. Moreover, borneol was oxidized even slightly faster than cyclohexanol.

Original languageEnglish
Pages (from-to)119-124
Number of pages6
JournalTopics in Catalysis
Volume19
Issue number1
DOIs
Publication statusPublished - Mar 1 2002

Keywords

  • Oxidation of alcohols
  • Ruthenium catalyst
  • Zeolite-encapsulated cobalt

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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