| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 61532 | Journal of Catalysis | 2012 | 6 Pages |
The bicarbonate-activated peroxide (BAP) system has been shown to constitute an excellent and versatile combination for the epoxidation of olefins. Herein, we demonstrate that the benign H2O2/NaHCO3 oxidative combination can be used for the enantioselective epoxidation of olefins using a chiral manganese porphyrin as a catalyst. This unprecedented result was made possible by the use of an ionic liquid with ultrasound, which leads to the activation of Mn-porphyrin catalysis.
Graphical abstractThis first example of ultrasonic asymmetric catalysis in ionic liquids clearly proves that the mechanism involves the porphyrin catalyst rather than the classical bicarbonate-activated peroxide (BAP).Figure optionsDownload full-size imageDownload high-quality image (145 K)Download as PowerPoint slideHighlights► Optimization of ionic liquids syntheses in terms of green chemistry. ► Environmentally benign H2O2/NaHCO3 combination used for enantioselective epoxidation of olefins. ► Ultrasound/ionic liquids combination prevents the bleaching of Mn catalyst. ► Mechanism for olefins epoxidation catalyzed by Mn-porphyrin in ionic liquid under ultrasound.
