Journal
CATALYSTS
Volume 11, Issue 12, Pages -Publisher
MDPI
DOI: 10.3390/catal11121477
Keywords
direct oxidative carboxylation; tandem catalysis; cyclic organic carbonates; tungstate ionic liquids
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The study presents a new catalytic protocol capable of converting unsaturated methyl oleate into carbonate in a single step, achieving high yield and retention of cis-configuration.
Conversion of unsaturated fatty acids, FAMEs or triglycerides into the corresponding cyclic organic carbonates involves two reaction steps-double-bond epoxidation and CO2 insertion into the epoxide-that are generally conducted separately. We describe an assisted-tandem catalytic protocol able to carry out carbonation of unsaturated methyl oleate in one-pot without isolating the epoxide intermediate. Methyl oleate carbonate was obtained in 99% yield and high retention of cis-configuration starting from methyl oleate using hydrogen peroxide and CO2 as green reagents, in a biphasic system and in the presence of an ammonium tungstate ionic liquid catalyst with KBr as co-catalyst.
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