[F:1][C:2]([F:18])([S:13][CH2:14][CH2:15][CH2:16][OH:17])[C:3]([F:12])([F:11])[C:4]([F:10])([F:9])[C:5]([F:8])([F:7])[F:6].ClC1C=CC=C(C(OO)=O)C=1.[OH2:30].[OH2:31].O.O.O.S([O-])([O-])(=O)=S.[Na+].[Na+].O>C(Cl)Cl>[F:18][C:2]([F:1])([S:13]([CH2:14][CH2:15][CH2:16][OH:17])(=[O:31])=[O:30])[C:3]([F:12])([F:11])[C:4]([F:10])([F:9])[C:5]([F:8])([F:7])[F:6]3-(Perfluorobutylthio)propanol (8.60 g, 27.6 mmol) prepared in Synthetic Example 1 was dissolved in methylene chloride (80 ml), and m-chloroperbenzoic acid (m-CPBA) (52 g, 232 mmol) was added at room temperature in two portions with stirring, the reaction vessel being equipped with a calcium chloride tube. The mixture was stirred at room temperature for 7 days. The reaction mixture was injected into a mixture of sodium thiosulfate pentahydrate (130 g) and water (200 ml), and stirred for 1 hour. Methylene chloride (100 mL) was added and an organic layer was removed and an aqueous layer was extracted with methylene chloride (50 ml). Organic layers were joined, washed with a 5% aqueous sodium hydrogen carbonate and with a saturated saline solution, and then dried over sodium sulfate. A filtrate after filtration was concentrated at reduced pressure. A residue was subjected to a silica gel column chromatography (eluting solvent: hexane/ethyl acetate (2/1)), and fractions having Rf value of 0.32 [Rf value (Thin Layer Chromatography (TLC))=(Migration distance of sample)/(Migration distance of eluting solvent)] were gathered, concentrated at reduced pressure and dried at vacuum to give crystalline 3-(perfluorobutylsulfonyl)propanol (8.79 g). Yield: 91.8%.
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