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Fluonnating agent, preparation

Mixtures of anhydrous hydrogen fluoride and tetrahydrofuran are successfully used as fluonnating agents to convert 1,1,2-trifluoro-l-alken-3-ols, easily prepared from bromotrifluoroethene via lithiation followed by the reaction with aldehydes or ketones, to 1,1, l,2-tetrafluoro-2-alkenes The yields are optimal with a 5 1 ratio of hydrogen fluoride to tetrahydrofuran The fluonnation reaction involves a fluoride ion-induced rearrangement (SN2 mechanism) of allylic alcohols [65] (equation 40)... [Pg.216]

Fluonnated organosihcon compounds are very useful for introduction of tnalkylsilyl protecting groups in synthesis TVialkylsilyl trifluoroacetamides are perhaps the best known of these agents, for they can be used to prepare stlyl ethers orsdyl esters [91, 92] (equation 76)... [Pg.599]

See other pages where Fluonnating agent, preparation is mentioned: [Pg.46]    [Pg.364]    [Pg.72]    [Pg.220]    [Pg.364]    [Pg.25]    [Pg.46]    [Pg.72]    [Pg.220]    [Pg.364]    [Pg.534]    [Pg.1130]    [Pg.534]    [Pg.1130]    [Pg.534]    [Pg.1130]   
See also in sourсe #XX -- [ Pg.152 ]

See also in sourсe #XX -- [ Pg.152 ]

See also in sourсe #XX -- [ Pg.152 ]



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