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The title compounds are obtained by direct hydrolysis of the corresponding 24-perfluoroalkyl-substituted anilines and anisoles by the system AcOH/HBr/H 2 O/Al 2 O 3 . A two-step preparation of 24-perfluoroacylanilines involves the treatment of the 24-perfluoroalkylaniline with sodium ethoxide followed by hydrolysis of the resultant diethyl acetal with hydriodic acid.
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