1-(4-Chloro-3-fluorophenyl)propan-2-one → 1-(4-Chloro-3-fluorophenyl)-2-methylpropan-2-ol

Temperature

76 °C

To a solution of methylmagnesium bromide (100 mL, 100.0 mmol, 1.0 M in THF) was added a solution of 1-(4-chloro-3-fluorophenyl)propan-2-one (9.00 g, 48.20 mmol) in THF (20 mL) dropwise at 0° C. under N2 and the reaction mixture was heated at 76° C. for 12 h. It was then cooled to rt and quenched with saturated NH4Cl aqueous solution (50 mL) and the mixture was poured into water (200 mL). The resulting mixture was extracted with EtOAc (100 mL×4) and the combined organic phases were washed with brine (100 mL×2), dried over anhydrous Na2SO4 (50 g) and concentrated in vacuo. The residue was purified by a silica gel column chromatography (PE/EtOAc (V/V)=8:1) to give the title compound as yellow liquid (8.61 g, 88.2%).

1. temperatureIt was then cooled to rt
2. customquenched with saturated NH4Cl aqueous solution (50 mL)
3. additionthe mixture was poured into water (200 mL)
4. extractionThe resulting mixture was extracted with EtOAc (100 mL×4)
5. washthe combined organic phases were washed with brine (100 mL×2)
6. dry with materialdried over anhydrous Na2SO4 (50 g)
7. concentrationconcentrated in vacuo
8. customThe residue was purified by a silica gel column chromatography (PE/EtOAc (V/V)=8:1)

ORD record

ord-5493becf99cc4981bfea89b9537e77e2

Source dataset

uspto-grants-2016_09

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09434695B2