反应详情

Sodium hydride (247 mmol, 9.88 g) was stirred in DMF (100 ml) at room temperature. triethylamine (165 mmol, 22.88 ml, 16.66 g) was added. tert-butyl 2-hydroxyethyl(methyl)carbamate (173 mmol, 30.3 g) was added dropwise in DMF. 4-bromo-1-fluoro-2-(trifluoromethyl)benzene (165 mmol, 40 g) was added in one portion and the reaction was stirred at room temperature overnight. The reaction mixture was diluted with EtOAc and washed with water. The organic was dried over sodium sulfate and concentrated in vacuo. The resulting residue was purified by flash chromatography eluting with heptane—60/40 heptane/EtOAc. Fractions were collected and combined to afford tert-butyl 2-(4-bromo-2-(trifluoromethyl)phenoxy)-ethyl(methyl)carbamate. (18.44 g)

1. washwashed with water
2. dry with materialThe organic was dried over sodium sulfate
3. concentrationconcentrated in vacuo
4. customThe resulting residue was purified by flash chromatography
5. washeluting with heptane—60/40 heptane/EtOAc
6. customFractions were collected