Xenon difluonde

The tnmethylsilyl enol ether of 1 mdanone (3 2 mmol) in 2 mL of methylene chlonde is added to a mixture of xenon difluonde (4 mmol) and a catalytic amount of pyndimum poly (hydrogen fluonde) m 5 mL of methylene chlonde The mixture IS stured at 0 C for 2 h and poured into dilute sodium bicarbonate solution, tlie organic layer is separated and dned After concentration and column chromatogra phy (silica gel, hexanes), 2-fluoro-1 -mdanone (mp, 59 C) is obtamed in 87% yield... 

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

Pentafluorophenylditelluride yields 79-80% pentafluorophenyltellunum tri fluoride on treatment with fluorine or xenon difluoride [105] The fluorinated tetravalent tellurium can be further oxidized to hexavalent tellurium with either xenon difluonde [122] or fluorine [123]... 

Polymer-bound phenyliodine difluoride, which also has been used as a reagent to add fluorine to alkenes, can be prepared by the addition of xenon difluonde to the polymer [134, 135 136] Methyl iodide is converted to trifluoro methyliodine difluonde by treatment with fluorine at -110 °C [137] Perfluoro-alkyliodine tetrafluondes could be synthesized from the perfluoroalkyliodme difluorides and fluorine 38 or chlorine tnfluonde [759] Perfluoroalkyl [140] and perfluoroary 1 [141] iodides are oxidized to the corresponding iodine difluondes by chlorine trifluoride. 

Diselenides can also be oxidatively fluonnated, as shown in equation 18 [118, 119], Benzene selenyl fluoride is postulated as an intermediate during the fluo-roselenation of alkenes with diphenyl diselenide and xenon difluonde [73, 120]... 

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)... 

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)... 

Xenon difluonde reaction with nitro enolates provides a useful entry into a wide variety of fluonnated synflietic intermediates [91 92] (equation 52)... 

Silyl enol ethers are fluonnated in high yields with xenon difluonde [62 93, 94 95] Applications of this reaction to the preparation of fluonnated... 

Xenon difluonde fluonnates adeimantane m low yield [45 (equation 22) When the carbon-hydrogen bond is activated by an a-sulfur atom, fluorination occurs readily The reactions involve intermediates that contain sulfur-fluorine bonds. A -Fluoropyridinium reagents behave similarly [99, 100, 101, 102] (equations 55-57)... 

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See also in sourсe #XX -- [ , ]

See also in sourсe #XX -- [ ]

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