Alkenes, Alkynes, Enols, and Vinyl Amines as the Nucleophiles

Alkenes, Alkynes, Enols, and Vinyl Amines as the Nucleophiles 

Arylation is possible by the addition of triplet aryl cations to neutral nucleophiles such as alkenes, alkynes, enols, and enamines (photo SN1 mechanism). For alkenes, the 

Finally, with a poor electrofugal group, the course of the reaction may be directed by choosing suitable conditions  

The photo-SNl reaction with particular classes of alkenes - namely enamines, silyl enol ethers and silyl ketene acetals - affords a smooth synthesis of a-aryl ketones, 

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