Xenon difluonde acids

Direct perfluoroalkylatwn of electron poor aromatic and heterocyclic systems with perfluorocarboxylic acids is mediated by xenon difluonde [165] (equation 142)... [Pg.485]

Xenon difluonde [ 5], xenon difluondecomplexed with dialkyl suthdes [89], and xenon difluonde intercalated with graphite [90] are all effective reagents for the fluonnation of acids, enolates, or enols (Table 2)... [Pg.161]

Carboxylic acids react with xenon difluonde to produce unstable xenon esters The esters decarboxylate to produce free radical intermediates, which undergo fluonnation or reaction with the solvent system Thus aliphatic acids decarboxylate to produce mainly fluoroalkanes or products from abstraction of hydrogen from the solvent Perfluoro acids decarboxylate in the presence of aromatic substrates to give perfluoroalkyl aromatics Aromatic and vinylic acids do not decarboxylate [91] (equation 51)... [Pg.161]