[NH2:1][CH2:2][CH2:3][CH2:4][CH2:5][OH:6].C([O:9][C:10](=O)[C:11]([F:14])([F:13])[F:12])C>C(O)C>[F:12][C:11]([F:14])([F:13])[C:10]([NH:1][CH2:2][CH2:3][CH2:4][CH2:5][OH:6])=[O:9]A solution (100 ml) of 4-aminobutanol (2.50 g, 28.05 mmol) and trifluoroacetic acid ethyl ester (19.92 g, 140.26 mmol) in ethanol was stirred at room temperature overnight. The reaction mixture was concentrated under reduced pressure to give 4-trifluoroacetamidobutanol (11) (5.44 g, q.) as a colorless syrup.
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