反应详情

温度

0 °C

Benzylethanolamine (1.78 g, 11.8 mmol.) was weighed into a 25 mL round bottom flask and diluted with dichloromethane. N,N-Diisopropylethylamine (2.66 mL, 15.3 mmol) was added quickly via syringe and the reaction was cooled to 0° C. After stirring at 0° C. for 10 minutes, acetoxyacetyl chloride (1.26 mL, 11.8 mmol) was added dropwise via syringe. The reaction was stirred overnight and allowed to warm to room temperature. The reaction mixture was diluted with ethyl acetate and washed with saturated aqueous sodium bicarbonate and saturated aqueous sodium chloride. The organic layer was separated and dried over anhydrous magnesium sulfate. The drying agent was removed via filtration and solvent was removed in vacuo to give crude title intermediate as a yellow oil. The crude material was chromatographed on silica gel using ethyl acetate as the mobile phase. Fractions were combined and solvent was removed in vacuo to give pure title intermediate as a clear oil (1.75 g, 59% yield). (m/z): [M+H]+ calcd for C13H17NO4 252.13, found 252.3.

1. stirringThe reaction was stirred overnight
2. temperatureto warm to room temperature
3. washwashed with saturated aqueous sodium bicarbonate and saturated aqueous sodium chloride
4. customThe organic layer was separated
5. dry with materialdried over anhydrous magnesium sulfate
6. customThe drying agent was removed via filtration and solvent
7. customwas removed in vacuo
8. customto give crude title intermediate as a yellow oil
9. customThe crude material was chromatographed on silica gel
10. customsolvent was removed in vacuo