[OH-].[Na+].O.[F:4][C:5]([F:26])([F:25])[CH:6]([CH2:21][CH2:22][CH2:23][CH3:24])[CH2:7][CH2:8][O:9][C:10]1[CH:20]=[CH:19][C:13]([C:14]([O:16]CC)=[O:15])=[CH:12][CH:11]=1>CO>[F:4][C:5]([F:25])([F:26])[CH:6]([CH2:21][CH2:22][CH2:23][CH3:24])[CH2:7][CH2:8][O:9][C:10]1[CH:20]=[CH:19][C:13]([C:14]([OH:16])=[O:15])=[CH:12][CH:11]=1In a round-bottomed flask, 0.27 g of sodium hydroxide and 1 ml of water were placed, 3 ml of methanol was added and then 0.7 9 of ethyl p-(3-trifluoromethylheptyloxy)benzoate was added thereto, followed by 4 hours of reaction at 50° C. Then, water was added to the system, and methanol was distilled off, followed by addition of 6N-hydrochloric acid to recover a precipitated crystal. The crystal was dried in a desiccator to obtain 0.55 g of p-(3-trifluoromethylheptyloxy)benzoic acid 4 (Yield: 90%)
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