Selective dihydroxylation of methyl oleate to methyl-9,10-dihydroxystearate in the presence of a recyclable tungsten based catalyst and hydrogen peroxide.
In: New Journal of Chemistry, Jg. 44 (2020-07-21), Heft 27, S. 11507-11512
academicJournal
Zugriff:
The dihydroxylation of fatty methyl esters is of prime importance for the synthesis of surfactants and lubricants. The conversion of methyl oleate (MO) to 98% yield of methyl-9,10-dihydroxystearate (MDHS) was performed in the presence of H 2 O 2 and H 3 PW 12 O 40 catalyst in the absence of a phase transfer agent. The study of the effect of hydrogen peroxide concentration revealed that significant catalytic activity was only achieved for an optimal amount of H 2 O 2 . A mechanism for this reaction was proposed where hydrogen peroxide reacts with H 3 PW 12 O 40 to produce peroxo-phosphotungstate anions, which directly dihydroxylate MO. The recyclability of the catalyst was also studied. To this aim, a recyclable form of the heteropolyacid was synthesized using Cs cations (Cs 2.3 H 0.7 PW 12 O 40 ). This catalyst was recycled up to three cycles without significant loss in catalytic performances. [ABSTRACT FROM AUTHOR]
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Titel: |
Selective dihydroxylation of methyl oleate to methyl-9,10-dihydroxystearate in the presence of a recyclable tungsten based catalyst and hydrogen peroxide.
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Autor/in / Beteiligte Person: | Araji, Nahla ; Chatel, Gregory ; Moores, Audrey ; Jérôme, François ; De Oliveira Vigier, Karine |
Zeitschrift: | New Journal of Chemistry, Jg. 44 (2020-07-21), Heft 27, S. 11507-11512 |
Veröffentlichung: | 2020 |
Medientyp: | academicJournal |
ISSN: | 1144-0546 (print) |
DOI: | 10.1039/d0nj02167a |
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