Other Epoxidation Methods
Other Epoxidation Methods: Introduction
In addition to the epoxidation of olefins with peracids, the following alternative processes are known:
- Chlorohydrin process (indirect epoxidation): Reaction of the olefin either with hypochlorous acid or with chlorine and water gives the chlorohydrin which subsequently yields the epoxide on alkaline treatment.
- Halcon reaction: Epoxides also can be prepared by treating olefins with alkyl hydroperoxides, mainly tert-butyl hydroperoxide, catalyzed by vanadium, titanium or molybdenum complexes.
- Sharpless epoxidation: Reaction of the olefin with one of the enantiomers of diethyl tartrate stereoselectively yields the epoxide .
- Epoxidation with dioxirane
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