反应详情

温度

0 °C

To a suspension of 2-chloroacetamide (25 g, 267 mmol) in 1,2-dichloroethane (125 mL) was added dropwise oxalyl chloride (28 mL, 321 mmol) at 0° C. After heating under reflux for 3 hr, the mixture was cooled to 0° C., tert-butyl alcohol/1,2-dichloroethane (75 mL, 1/1) was added to the mixture, and the mixture was stirred for 20 min. Saturated aqueous sodium hydrogencarbonate solution was added to the reaction mixture, and the mixture was extracted with 1,2-dichloroethane. After washing with saturated aqueous sodium hydrogencarbonate solution and water, the extract was dried over anhydrous magnesium sulfate and filtrated. The solvent was evaporated under reduced pressure, and the residue was recrystallized from cyclohexane to give the title compound (25.6 g, 49%) as white crystals.

1. temperatureAfter heating
2. temperatureunder reflux for 3 hr
3. extractionthe mixture was extracted with 1,2-dichloroethane
4. washAfter washing with saturated aqueous sodium hydrogencarbonate solution and water
5. dry with materialthe extract was dried over anhydrous magnesium sulfate
6. filtrationfiltrated
7. customThe solvent was evaporated under reduced pressure
8. customthe residue was recrystallized from cyclohexane