Journal
GREEN CHEMISTRY
Volume 15, Issue 5, Pages 1173-1182Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3gc36710j
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Funding
- DFG (Deutsche Forschungsgemeinschaft) via CRC 442 [Sonderforschungsbereich 442]
- BMBF (Federal Ministry of Education and Research)
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Organic halides and polyoxometalates (POMs) were studied as catalyst systems for the insertion of carbon dioxide into epoxides originating from plant oils as biogenic feedstock. In the formation of methyl oleate carbonate, synergistic rate acceleration and increased cis-selectivity were observed using ammonium halide and transition metal substituted silicotungstate POMs catalysts in a combined system. Mechanistic insight into the cooperative action was gained by kinetic measurements and analysis of the stereochemical outcome of the reaction. For poly-epoxidised oleochemicals as substrates, the simple ammonium halide catalyst gave better performance as side reactions were encountered with the POM-containing system.
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