反应详情

温度

-10 °C

To a chilled solution (−10° C.) of 4-chloro-3-nitrobenzoyl chloride (1.85 g, 8.4 mmol) in anhydrous THF (60 mL) was added dropwise a solution of ethanolamine (0.48 mL, 8.0 mmol) in THF (20 mL) followed by TEA (1.1 mL, 8.0 mmol). After stirring 1 h while temperature was maintained at −10° C., the solution was combined with a 1:1 mixture of ice and saturated NaHCO3 (100 mL) and then extracted with EtOAc (3×100 mL). The combined organic layers were washed with brine, dried over Na2SO4, and concentrated to give 4-chloro-N-(2-hydroxyethyl)-3-nitrobenzamide (1.74 g, 89%) as a white solid, which was used without purification. TLC (3:22 MeOH/DCM Rf 0.36).

1. extractionextracted with EtOAc (3×100 mL)
2. washThe combined organic layers were washed with brine
3. dry with materialdried over Na2SO4
4. concentrationconcentrated