Triethylamine → 4,4,5,5,5-Pentafluoropentyl thioacetate

To a solution of 4,4,5,5,5-pentafluoropentanol (23.2 g, 130 mmol) in dry dichloromethane (100 ml) were added dropwise at 0° C. triethylamine (27 g, 267 mmol) and methanesulfonylchloride (30 g, 262 mmol), which was then warmed to room temperature over 12 hours. After the reaction was completed, the mixture was poured into ice-water, and extracted with chloroform. The organic layer was dried over anhydrous magnesium sulfate, and concentrated under reduced pressure to give a crude product (33.9 g). This crude product thus obtained was then dissolved in acetone (500 ml), potassium thioacetate (18 g, 158 mmol) was added thereto at room temperature, and the resulting mixture was stirred for 12 hours. The precipitate was filtered, and the filtrate was concentrated under reduced pressure to give a crude product. This crude product thus obtained was subjected to silica gel column chromatography (n-hexane:ethyl acetate=20:1) to give 4,4,5,5,5-pentafluoropentylthioacetate (15.8 g, yield 51%).

1. extractionextracted with chloroform
2. dry with materialThe organic layer was dried over anhydrous magnesium sulfate
3. concentrationconcentrated under reduced pressure
4. customto give a crude product (33.9 g)
5. customThis crude product thus obtained
6. filtrationThe precipitate was filtered
7. concentrationthe filtrate was concentrated under reduced pressure
8. customto give a crude product
9. customThis crude product thus obtained

ORD record

ord-fbdcec5db4e24b20863cebbdbbc14105

Source dataset

uspto-grants-2006_07

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07074819B2