Perfluoroaryl

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 difluoride to the polymer [134, 135 136] Methyl iodide is converted to trifluoro methyliodine difluoride by treatment with fluorine at -110 C [137] Perfluoro-alkyliodine tetrafluorides could be synthesized from the perfluoroalkyliodine difluorides and fluorine [138] or chlorine trifluoride [139] Perfluoroalkyl [140] and perfluoroaryl [141] iodides are oxidized to the corresponding iodine difluorides by chlorine trifluoride. 

Hydrolysis of geminal fluorides requires activation by per- or polyfluoroalkyl or perfluoroaryl groups and by double bonds linked to the same or adjacent carbon The activation is the result of reducing the electron density at the fluorinated carbon, facilitating attack by, primarily, nucleophilic reagents... 

During studies of the reaction of heteroaryl hydrazine and perfluoroaryl hydrazine with l,l,l-trifluoropentane-2,4-dione, the enolization of the dione 18 was... 

Piers, W.E. (2005) The chemistry of Perfluoroaryl Boranes. Advances in OrganometaUic Chemistry, 52, 1—77. 

Pandurangi, R.S. et al. (1997a) Recent trends in the evaluation of photochemical insertion characteristics of heterobifuncdonal perfluoroaryl azide chelating agents Biochemical implications in nuclear medicine. Photochem. Photobiol. 65(2), 208-221. 

Pandurangi, R.S. et al. (1998) Chemistry of bifunctional photoprobes Part 4. Synthesis of the chromoge-nic, cleavable, water soluble and heterobifunctional (N-Methyl amino perfluoroaryl azide benzamido)-ethyl-l,3-dithiopropionyl sulfosuccinimide An efficient protein cross-linking agent. Bioorg. Chem. 26(4), 201-212. 

A further reaction of general importance, the cleavage of disulfanes by means of a fluorinating agent, provides in the case of perfluoroaryl disulfanes the sulfenyl fluorides in good yield 33) ... 

The stmctiual properties of materials containing both aryl and perfluoroaryl groups have attracted attention in recent years because of the observed propensity for such... 

In polyfluorobenzenes having other substituents in addition to fluorine, including per-fluoroalkyl or perfluoroaryl groups, the elimination of only one fluorine atom proceeds more readily, with the para position in pentafluorobenzene derivatives being replaced first. The reaction conditions used for monosubstitution of fluorine depend markedly on the substrate and on the nucleophilic agent chosen. In most cases the reaction can be carried out in ethylene glycol/pyridine using sodium hydroxide as base (Table 3). 

Ligand exchange of bis(perfIuoroalkyl)cadmium or bis(perfluoroaryl)cad-mium complexes with trimethyllead(tnfluoroacetate) gives the coiTesponding trimethyl(perfluoroalkyl)lead and trimethyl(perfluoroaryl)lead compounds in good yields [4] (equation 16)... 

Perfluorotoluene and pentafluoropyridine have been proposed as reagents for protecting alcohols and phenols as perfluoroaryl ethers, a reaction which takes place under mild PTC conditions. Deprotection involves demethoxylation with NaOMe in DMF at 60 C (Scheme 18 R = phenyl, steroidal).158... 

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