Trifluoroacetic anhydnde

Treatment of N hydroxysuccinimide with trifluoroacetic anhydnde gives N trifluoroacetoxysuccinimide quantitatively [27] Some otherwise hardly accessible trifluoroacetylated tertiary alcohols are readily prepared, though in poor yields, by reacting the appropriate anhydride with an excess of an organometallic reagent [22] (equation 11)... 

Trifluoroacetic anhydnde in a mixture with sulfuric acid is an efficient reagent for the sulfonylation of aromatic compounds [44] The reaction of benzene with this system m nitromethane at room temperature gives diphenyl sulfone in 61% yield Alkyl and alkoxy benzenes under similar conditions form the corresponding diaryl sulfones in almost quantitative yield, whereas yields of sulfones from deactivated arenes such as chlorobenzene are substantially lower [44] The same reagent (trifluoroacetic anhydride-sulflinc acid) reacts with adamantane and its derivatives with formation of isomeric adamantanols, adamantanones, and cyclic sultones [45]... 

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