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Coaxed into action: Although ester groups are usually inert towards organopalladium reagents, β-(2-haloanilino)esters undergo intramolecular palladium-catalyzed acylation to give dihydroquinolin-4-ones (see scheme). A four-membered azapalladacycle intermediate is postulated to facilitate the nucleophilic addition. R=Me, OMe, CO2Me, Cl; R1,R2=H, Me, Ph.
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Solé et al. (2007) studied this question.
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