Corey mechanism, allylic alcohol

The exact nature of the catalytic species remains incompletely understood and very controversial. Recently, Corey proposed a hypothesis on the origin of the enantioselectivity of this reaction (Scheme 29) (69). His mechanism involves an ion pair in which the allylic alcohol, rather than alkoxide, is coordinated to Ti(IV) atom and the hydroxyl proton is... 

SCHEME 29. Corey mechanism of Ti-catalyzed epoxidation of allylic alcohols. 

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