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Tetrabutylammonium hydrogen difluoride

The acidic form of sodium fluoride, sodium bifluoride is scarcely used for introduction of fluorine in organic compounds. One reported example is the addition of bromofluorine to perfluoro(2-methylpent-2-ene) (20) generated by reacting A V -dibromodimethylhydantoin with acidic sodium fluoride in the presence of tetrabutylammonium hydrogen difluoride at 0°C to give 21.20... [Pg.551]

Tetrabutylammonium hydrogen difluoride (tetrabutylammonium bifluoride, TB.ABF). prepared via ion exchange from tetrabutylammonium chloride and ammonium hydrogen difluoride with Amberlite IRA410 exchange resin, gives similar results with primary and secondary substrates. [Pg.123]

Tetrabutylammonium Hydrogen Difluoride (TBABF) Single Procedure ... [Pg.286]

Preparative Methods prepared by treatment of triphenylsilyl fluoride with tetrabutylammonium fluoride (TBAF), or by reaction of triphenylsilane with tetrabutylammonium hydrogen difluoride. ... [Pg.479]

Trimethyl(trifluoromcthyl)siIanc is easily fluorodesilylated by tris(dimethyIamino)suIfonium difluorotrimethylsilicate [TASF(Me)], tetrabutylammonium fluoride, or tris(diethylamino) (methylamino)phosphonium hydrogen difluoride and, if arenesiilfonyl fluorides are used to trap the trifluoromethyl anion, trifluoromethyl sulfones are formed in high yield. Trisfdiethyl-amino)(methylamino)phosphonium phenolate is also an effective catalyst for this reaction, but TASF(Me) is favored as it can achieve the quantitative transformation of ArSOjF into aryl trifluoromethyl sulfones. ... [Pg.416]

Another convenient one-pot and high-yielding procedure for the preparation of aryl trifluoromethyl sulfones 37 from readily available arenesulfonyl fluorides and trimethylftrifluo-romethyl)silanc or -stannane, catalyzed by soluble nucleophilic agents such as tetrabutylammonium fluoride, tris(diethylamino)(methylamino)phosphonium hydrogen difluoride, tris-(diethylamino)(methylamino)phosphonium phenolate, and tris(dimethylamino)sulfonium di-fluorotrimcthylsilicate, has been reported.77... [Pg.416]

TBABF = tetrabutylammonium hydrogen fluoride TBPTF = telrabutylphos-phonium dihydrogen difluoride. [Pg.336]

The conversion of a U>Hepp derivative to its DD-isomer via a mesylate is referred to in Part 1 of this Chapter (Ref 56), and the thesis of 2,S-anhydto-3,4,6-tti-0-benz( -D-aIIon(Mutrile from D-g)ucose via a tiimesylate is covered in Cht iter 10. IX lacement of mesylate at the anomeric centre of 1-deoxy-l,l,l-tiifluoro-2-ulose derivatives 50 by nucleophilic reagmts sudi as tetrabutylammonium acetate, lithium azide, or hydrogen difluoride in the presence of triethylainine proceeded in 40-90 % yidd the CF3 group stalnlizes the sulfonate and destabilizes the cation at the anomeric centre. ... [Pg.109]

Tetrabutylammonium hydrogen sulfate s. under NaOCl Peroxodisulfuryl difluoride... [Pg.371]

See other pages where Tetrabutylammonium hydrogen difluoride is mentioned: [Pg.337]    [Pg.359]    [Pg.337]    [Pg.359]    [Pg.191]    [Pg.149]    [Pg.129]    [Pg.129]    [Pg.336]    [Pg.129]    [Pg.62]    [Pg.62]    [Pg.62]    [Pg.20]   
See also in sourсe #XX -- [ Pg.359 ]



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