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Halogenations organolithium reagent generation

Several examples of intramolecular additions to carbonyl groups by organolithium reagents generated by halogen-metal exchange have been reported, such as the examples shown below. What relative reactivity relationships must hold in order for... [Pg.472]

Deprotonation is not the only way to use one simple organometaUic reagent to generate another more useful one. Organolithiums can also remove halogen atoms from alkyl and aryl halides in a reaction known as halogen—metal exchange. [Pg.188]

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Halogenation reagents

Organolithium reagents

Organolithiums reagents