反应详情

温度

0 °C

To a solution of methyl 2-amino-3-(4-methoxyphenyl)-3-oxopropanoate (35.5 g, 137 mmol) and Et3N (57.2 mL, 411 mmol) in DCM (120 mL) at 0° C. was added AcCl (12.9 g, 164 mmol) dropwise. The reaction mixture was stirred at 0° C. for 40 min and then quenched with water (500 mL). The resulting mixture was extracted with DCM (300 mL×2) and the combined organic layers were dried over anhydrous sodium sulfate and concentrated. The residue was washed with petroleum ether/EtOAc (300 mL, 100:1) to methyl 2-acetamido-3-(4-methoxyphenyl)-3-oxopropanoate (22.0 g, 61% yield) as a colorless solid.

1. customquenched with water (500 mL)
2. extractionThe resulting mixture was extracted with DCM (300 mL×2)
3. dry with materialthe combined organic layers were dried over anhydrous sodium sulfate
4. concentrationconcentrated