2,2,2-Trifluoroethanol → 2,2,2-Trifluoroethyl Methanesulfonate

To 2,2,2-trifluoroethanol (5.0 g, 50.0 mmol) and triethylamine (10.5 ml, 7.6 g, 75.0 mmol) in 25 ml of methylene chloride at -10° is added methanesulfonyl chloride (4.25 ml, 6.3 g, 55.0 mmol) over 20 min., maintaining the temperature at 0° to -10°. After addition is complete, the mixture is stirred at 0°-5° for 30 min. It is then poured into ice water and additional methylene chloride is added. The layers are separated, and the methylene chloride layer is washed with cold 10% HCl, with cold saturated sodium bicarbonate, with cold water until neutral, and with cold brine. The organic layer is dried over calcium sulfate with swirling and is filtered and the solvent is removed to give 2,2,2-trifluoroethyl methanesulfonate.

1. temperaturemaintaining the temperature at 0° to -10°
2. additionAfter addition
3. additionis added
4. customThe layers are separated
5. washthe methylene chloride layer is washed with cold 10% HCl, with cold saturated sodium bicarbonate, with cold water until neutral, and with cold brine
6. dry with materialThe organic layer is dried over calcium sulfate
7. filtrationis filtered
8. customthe solvent is removed

ORD record

ord-e058423a39d44d16a401966cf1ddcbc6

Source dataset

uspto-grants-1990_11

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04968829