L-Methionine → 1-Bromo-3-fluoro-5-(methoxymethyl)benzene

NaH (60% dispersion in mineral oil, 245 mg, 6.12 mmol) was added to a solution of (3-bromo-5-fluorophenyl)methanol (1.195 g, 5.83 mmol) in 2-Me THF (20 mL). After gas evolution had ceased, MeI (0.455 mL, 7.29 mmol) was added and the resulting mixture was stirred at r.t. for 16 h. Another portion of NaH (50 mg, 2.1 mmol) and Met (0.10 mL, 1.6 mmol) were added and the mixture was heated to 60° C. for 2 h. The cooled mixture was diluted with EtOAc, washed with water, dried over MgSO4 and concentrated in vacuo. The residue was purified by flash chromatography on silica (gradient of 0-15% EtOAc in heptane) to give 0.810 g (63% yield) of the title compound: 1H NMR (400 MHz, DMSO-d6) δ ppm 3.30 (s, 3H), 4.38-4.46 (m, 2H), 7.18 (m, 1H), 7.37 (s, 1H), 7.44-7.50 (m, 1H); MS (EI) m/z 218 M′.

1. temperaturethe mixture was heated to 60° C. for 2 h
2. washwashed with water
3. dry with materialdried over MgSO4
4. concentrationconcentrated in vacuo
5. customThe residue was purified by flash chromatography on silica (gradient of 0-15% EtOAc in heptane)

ORD-Eintrag

ord-d72ee532f7da493d9a4cca6afd72c574

Quelldatensatz

uspto-grants-2016_02

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US09248129B2