3-Fluoro-N-methoxy-N-methylbenzamide → 3-Fluoroacetophenone

Temperature

-78 °C

A solution of 3-fluoro-N-methoxy-N-methylbenzamide (16 g, 87.4 mmol) in THF (150 mL) was cooled to −78° C. Vinylmagnesium bromide (120 mL, 120 mmol) was added slowly. The mixture was stirred at −78° C. for 10 min, at rt for 3 h, and quenched by addition of 1 N aq HCl (100 mL) at 0° C. The aqueous layer was extracted with EtOAc (100 mL). The combined organic phase was washed with brine (50 mL), dried over Na2SO4, and concentrated. The residue was purified by column chromatography to afford 1-(3-fluorophenyl)ethanone (9.7 g, yield: 75%) as a colorless oil.

1. customquenched by addition of 1 N aq HCl (100 mL) at 0° C
2. extractionThe aqueous layer was extracted with EtOAc (100 mL)
3. washThe combined organic phase was washed with brine (50 mL)
4. dry with materialdried over Na2SO4
5. concentrationconcentrated
6. customThe residue was purified by column chromatography

ORD record

ord-db3f5c2856d34082a50d13c8aaacd949

Source dataset

uspto-grants-2013_11

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08575157B2