(Bis(2-methoxyethyl)amino)sulfur trifluoride → 4-Bromo-1-chloro-2-(1-fluoroethyl)benzene

Temperature

0 °C

Bis(2-methoxyethyl)aminosulfur trifluoride (4.5 g, 20.34 mmol) was added to a stirred solution of 1-(5-bromo-2-chlorophenyl)ethanol (3.99 g, 16.95 mmol) in dichloromethane (50 mL) at 0° C. The resulting solution was stirred at 0° C. for 3 h. The reaction mixture was quenched with a 5% solution of aqueous sodium bicarbonate (100 mL) and the resulting bubbling biphasic reaction mixture was vigorously stirred at 0° C. for 15 m. The reaction mixture was diluted with water (50 mL) and extracted with dichloromethane twice. The combined organic layers were washed with 1M hydrochloric acid, dried and concentrated by rotary evaporation. The product was purified by flash chromatography on silica gel (hexanes) to yield the title compound (2.65 g, 11.16 mmol, 65.8% yield) as a clear oil: 1H NMR (CDCl3): δ 7.65 (d, 1H), 7.37 (m, 1H), 7.20 (m, 1H), 5.88 (dq, 1H), 1.61 (dd, 3H).

1. customThe reaction mixture was quenched with a 5% solution of aqueous sodium bicarbonate (100 mL)
2. customthe resulting bubbling
3. custombiphasic reaction mixture
4. stirringwas vigorously stirred at 0° C. for 15 m
5. extractionextracted with dichloromethane twice
6. washThe combined organic layers were washed with 1M hydrochloric acid
7. customdried
8. concentrationconcentrated by rotary evaporation
9. customThe product was purified by flash chromatography on silica gel (hexanes)

ORD record

ord-3ababfe1435749819142ae72ce188de8

Source dataset

uspto-grants-2013_12

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08609592B2