Highly Selective Oxidation of Alkylphenols to p-Benzoquinones with Aqueous Hydrogen Peroxide Catalyzed by Divanadium-Substituted Polyoxotungstates Full article
| Journal |
ACS Catalysis
ISSN: 2155-5435 |
||||
|---|---|---|---|---|---|
| Output data | Year: 2014, Volume: 4, Number: 8, Pages: 2706-2713 Pages count : 8 DOI: 10.1021/cs500738e | ||||
| Tags | alkylphenols, benzoquinones, hydrogen peroxide, polyoxometalates, selective oxidation | ||||
| Authors |
|
||||
| Affiliations |
|
Funding (1)
| 1 | Russian Foundation for Basic Research | 13-03-12042 |
Abstract:
The catalytic performance of divanadium- and dititanium-substituted γ-Keggin polyoxotungstates, TBA4H[γ-PW10V2O40] (I, TBA = tetra-n-butylammonium), TBA4H2[γ-SiW10V2O40] (II), and TBA8[{γ-SiW10Ti2O36(OH)2}2(μ-O)2] (III) has been assessed in the selective oxidation of industrially important alkylphenols/naphthols with the green oxidant 35% aqueous H2O2. Phosphotungstate I revealed a superior catalytic performance in terms of activity and selectivity and produced alkylsubstituted p-benzo- and naphthoquinones with good to excellent yields. By applying the optimized reaction conditions, 2,3,5-trimethyl-p-benzoquinone (TMBQ, vitamin E key intermediate) was obtained in a nearly quantitative yield via oxidation of 2,3,6-trimethylphenol (TMP). The efficiency of H2O2 utilization reached 90%. The catalyst retained its structure under turnover conditions and could be recycled and reused. An active peroxo vanadium complex responsible for the oxidation of TMP to TMBQ has been identified using 51V and 31P NMR spectroscopy.
Cite:
Ivanchikova I.D.
, Maksimchuk N.V.
, Maksimovskaya R.I.
, Maksimov G.M.
, Kholdeeva O.A.
Highly Selective Oxidation of Alkylphenols to p-Benzoquinones with Aqueous Hydrogen Peroxide Catalyzed by Divanadium-Substituted Polyoxotungstates
ACS Catalysis. 2014. V.4. N8. P.2706-2713. DOI: 10.1021/cs500738e WOS Scopus РИНЦ ANCAN OpenAlex
Highly Selective Oxidation of Alkylphenols to p-Benzoquinones with Aqueous Hydrogen Peroxide Catalyzed by Divanadium-Substituted Polyoxotungstates
ACS Catalysis. 2014. V.4. N8. P.2706-2713. DOI: 10.1021/cs500738e WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Submitted: | May 29, 2014 |
| Accepted: | Jul 9, 2014 |
| Published online: | Jul 16, 2014 |
| Published print: | Aug 1, 2014 |
Identifiers:
| Web of science: | WOS:000339983800038 |
| Scopus: | 2-s2.0-84905454587 |
| Elibrary: | 23977482 |
| Chemical Abstracts: | 2014:1120414 |
| Chemical Abstracts (print): | 161:246155 |
| OpenAlex: | W2062551810 |