Oxidation reactions catalyzed by osmium compounds. Part 4. Highly efficient oxidation of hydrocarbons and alcohols including glycerol by the H2O2/Os-3(CO)(12)/pyridine reagent

Autor(es)

Shul'pin, Georgiy B. ^[1] ; Kozlov, Yuriy N. ^[1] ; Shul'pina, Lidia S. ^[2] ; Carvalho, Wagner A. ^[3] ; Mandelli, Dalmo ^[3]

Afiliação do(s) autor(es)

^[1] Russian Acad Sci, Semenov Inst Chem Phys, Moscow 119991 - Russia

^[2] Russian Acad Sci, Nesmeyanov Inst Organoelement Cpds, Moscow 119991 - Russia

^[3] Fed Univ ABC UFABC, Ctr Nat & Human Sci, BR-09210170 Santo Andre, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: RSC ADVANCES; v. 3, n. 35, p. 15065-15074, 2013.
• Citações Web of Science: 19

Resumo

Triosmium dodecacarbonyl cluster Os-3(CO)(12) catalyzes oxidation of linear (n-heptane) and cyclic alkanes (cyclohexane, cyclooctane, methylcyclohexane, cis- and trans-1,2-dimethylcyclohexanes) to the corresponding cycloalkyl hydroperoxides by hydrogen peroxide in acetonitrile solution. Addition of pyridine leads to the acceleration of the process. Turnover numbers in the case of cyclooctane attain 60 000 and turnover frequencies are up to 24 000 h(-1). The alkyl hydroperoxide partly decomposes in the course of the reaction to afford cyclooctanone and cyclooctanol. Selectivity parameters obtained in oxidations of various linear and branched alkanes as well as kinetic features of the reaction indicated that the alkane oxidation occurs with the participation of hydroxyl radicals. A similar mechanism operates in transformation of benzene into phenol and styrene into benzaldehyde. The system also oxidizes 1-phenylethanol to acetophenone. Glycerol is oxidized to produce dihydroxyacetone, glycolic acid and hydroxypyruvic acid. (AU)

• Processo FAPESP: 05/51579-2 - Oxidação de alcanos em condições brandas catalisada por Mn(IV)-TMTACN-ácido oxálico-H2O2
• Beneficiário: Marianne Garroux Matthes
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 06/03996-6 - Oxidação de compostos orgânicos incluindo produtos naturais catalisada por complexos de metais de transição: Mn, Os e Cu
• Beneficiário: Dalmo Mandelli
• Modalidade de apoio: Auxílio à Pesquisa - Regular