[F:1][C:2]([F:11])([CH:5]([F:10])[C:6]([F:9])([F:8])[F:7])[CH2:3][OH:4].[Br:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH2:18][CH2:19][CH2:20][CH2:21][CH2:22][C:23](O)=[O:24].CS(O)(=O)=O.C1C=CC=CC=1>O>[Br:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH2:18][CH2:19][CH2:20][CH2:21][CH2:22][C:23]([O:4][CH2:3][C:2]([F:11])([F:1])[CH:5]([F:10])[C:6]([F:9])([F:7])[F:8])=[O:24]A 500 ml one-necked flask fitted with a Dean Stark trap was charged with 36.4 g (0.2 m) of 2,2,3,4,4,4-hexafluorobutanol, 53.0 g (0.2 m) of 11-bromoundecanoic acid, 0.5 g methane sulfonic acid and 100 ml of dry benzene. The reaction mixture was refluxed until the theoretical amount of water, 3.6 ml, was removed. The reaction mixture was washed with a 10% sodium carbonate solution. The benzene was removed under vacuum giving 2,2,3,4,4,4-hexafluorobutyl 11-bromoundecylate. IR analysis showed the following major absorption bands: 2930, 2860, 1760, 1190, 1110 cm-1.
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