OXIDATION OF ETHYLBENZENE BY ACTIVATED DIOXYGEN ON COPPER DIACYLATES IN THE PRESENCE OF TERT-BUTYL HYDROPEROXIDE AND SOME O- AND N-CONTAINING LIGANDS |
| 2 | |
| 2009 |
| CHEMISTRY |
| scientific article | 547.113,54.39,546.562,542.943.7 | ||
| 83-88 | activated dioxygen, catalytic oxidation of ethylbenzene, copperII diacylates, tert-butyl hydroperoxide, pyridine, 2,6-dimethylpyridine, N,N-dimethylaniline, triethylamine, 2,2,6,6-tetramethylpiperidine-oxyle radical |
| Systems including Cu(OAcyl)2 - ButOOH - O2 (Acyl = CH3C(O)-, (CH3)3C(O)-, CH3(CH2)7C(O)-, C6H5C(O)-)
oxidize C-H bonds of methylene group of ethylbenzene to form acetophenone, methylphenylcarbinol and hydroperoxide
of ethylbenzene at room temperature on the radical chain way in the presence of some O- and N-additions as
coordinated ligands. Oxidizing agents are the coordinated ?2-peroxidized derivatives of hypervalent copper (III).The
latter is formed in situ as a result of radical oxidizing addition of ButOOH to Cu diacylates in the presence of O2
dissolved in hydrocarbon. These peroxides are responsible for oxygen activation. The impact of the structure and
compositions of Cu diacylates and some O- and N- coordinated additions on yields of the oxidation products has
been studied. |
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