Hydrochloric Acid → 1-(6-Chloropyridin-3-yl)-2,2,2-trifluoroethan-1-ol

To a solution of 6-chloronicotinaldehyde (5.93 g, 41.9 mmol) and CsF (1.27 g, 8.38 mmol) in DME (350 mL) was added trimethyl(trifluoromethyl)silane (9.82 mL, 62.8 mmol) in THF (30 mL) at 0° C. The reaction mixture was allowed to warm to ambient temperature and the reaction was stirred at ambient temperature for 18 hours. 1 N HCl (50 mL) in water was added and the reaction was stirred at ambient temperature for 1 hour. Ethyl acetate (100 mL) was added. The organic layer was separated, washed with saturated sodium bicarbonate and brine, dried (sodium sulfate), filtered and concentrated under reduced pressure. The residue was purified by flash chromatography on silica gel (4:1 hexane/ethyl acetate) to give 1-(6-chloropyridin-3-yl)-2,2,2-trifluoroethanol (8.8 g, 99.3%) as an oil.

1. stirringthe reaction was stirred at ambient temperature for 1 hour
2. customThe organic layer was separated
3. washwashed with saturated sodium bicarbonate and brine
4. dry with materialdried (sodium sulfate)
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure
7. customThe residue was purified by flash chromatography on silica gel (4:1 hexane/ethyl acetate)

ORD record

ord-acdbdd778e884f39b924367dfc428c85

Source dataset

uspto-grants-2014_11

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08889704B2