反应详情

To a solution of 6-benzenesulfonyl-3,4-dihydro-2H-benzo[1,4]oxazine (0.200 g., 0.727 mmol) in 0.5 mL chloroform was added bromoacetonitrile (0.100 mL, 1.45 mmol) and N,N-diisopropyl ethylamine (0.190 mL, 1.1 mmol). The solution was refluxed for 18 hours and cooled to room temperature. To the reaction mixture was added 15 mL dichloromethane and 20 mL water. The fractions were separated, and the organic fraction was washed with 50 mL water. The organic fraction was dried over Na2SO4, concentrated in vacuo, and the residue purified by flash chromatography (10-50% ethyl acetate in hexanes) to give 0.246 g (0.719 mmol, 99%) of (6-benzenesulfonyl-2,3-dihydro-benzo[1,4]oxazin-4-yl)-acetonitrile as a clear oil. MS: 315 (M+H)+.

1. temperatureThe solution was refluxed for 18 hours
2. customThe fractions were separated
3. washthe organic fraction was washed with 50 mL water
4. dry with materialThe organic fraction was dried over Na2SO4
5. concentrationconcentrated in vacuo
6. customthe residue purified by flash chromatography (10-50% ethyl acetate in hexanes)