One-Pot Tandem Catalytic Epoxidation—CO2 Insertion of Monounsaturated Methyl Oleate to the Corresponding Cyclic Organic Carbonate

Conversion of unsaturated fatty acids, FAMEs or triglycerides into the corresponding cyclic organic carbonates involves two reaction steps—double-bond epoxidation and CO2 insertion epoxide—that are generally conducted separately. We describe an assisted-tandem catalytic protocol able to carry out carbonation methyl oleate in one-pot without isolating epoxide intermediate. Methyl carbonate was obtained 99% yield high retention cis-configuration starting from using hydrogen peroxide as green reagents, a biphasic system presence ammonium tungstate ionic liquid catalyst with KBr co-catalyst.