Alkenes by diazonium ions

Scheme 11.7 illustrates some arylation of alkenes by diazonium ions. Entries 1 to 4 are typical conditions. Entry 5 illustrates generation of the diazonium ion under in situ conditions. Entry 6 is an example of the reductive conditions using Ti(III). 

Reduction of aryl diazonium ions by Ti(IEL) in the presence of a,/ -unsaturated ketones and aldehydes leads to /> arylation and formation of the saturated ketone or aldehyde. The early steps in this reaction parallel the copper-catalyzed reaction. However, rather than being oxidized, the radical formed by the addition step is reduced by Ti(IEL).109 Scheme 11.7 illustrates some typical examples of arylation of alkenes by diazonium ions. 

Ar- + RCH=CHCR ArCHCHCR - - % ArCHCH2CR Scheme 11.7 illustrates some typical arylations of alkenes by diazonium ions. 

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See also in sourсe #XX -- [ ]

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