反应详情

A mixture of methyl α-aminoisobutyrate hydrochloride (10.3 g, 67.0 mmol), 3,5-difluorophenacyl bromide (15.0 g, 63.8 mmol), and K2CO3 (17.6 g, 128 mmol) in DMF (100 mL) was stirred at ambient temperature for 3 h. Saturated aqueous NaHCO3 (400 mL) was added and the mixture was extracted with EtOAc (1 L). The organic layer was washed with brine, dried over Na2SO4, filtered, and concentrated in vacuo. The crude product was purified by silica gel chromatography, eluting with a gradient of hexane:EtOAc—100:0 to 0:100, to give the title compound. MS: m/z=272 (M+1).

1. extractionthe mixture was extracted with EtOAc (1 L)
2. washThe organic layer was washed with brine
3. dry with materialdried over Na2SO4
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customThe crude product was purified by silica gel chromatography
7. washeluting with a gradient of hexane