反应详情

温度

-10 °C

(S)-3-Amino-3-(3-nitrophenyl)propanoic acid (500 mg, 2.4 mmol) was dissolved in 2.0HCl in dioxane (2 mL) and concentrated in vacuo. In a separate flask thionyl chloride (0.21 mL, 2.8 mmol) was added to ethanol at −10° C. The ethanolic solution was stirred for 20 min at −10° C. then added to the HCl salt of (S)-3-amino-3-(3-nitrophenyl)propanoic acid. The resulting solution was stirred at ambient temperature for 1 h and at 40° C. for 3 h. The reaction mixture was concentrated in vacuo to yield 34A (600 mg, 92%) as a white solid. MS (ESI) m/z 239.09 (M+H)+.

1. concentrationconcentrated in vacuo
2. stirringThe resulting solution was stirred at ambient temperature for 1 h and at 40° C. for 3 h
3. concentrationThe reaction mixture was concentrated in vacuo