反应详情

4-Amino-2-(2-chloro-phenylamino)-3-fluoro-5-nitro-benzoic acid methyl ester 5b (0.30 g, 0.88 mmol) is suspended in AcOH (5 mL) and zinc dust (0.29 g, 4.42 mmol) is added. After 15 minutes, the reaction is complete. The reaction mixture is diluted with ethyl acetate and filtered through Celite. The filtrate is washed with water, saturated NaHCO3, 10% K2CO3 and brine. The organic layer is dried (MgSO4) and concentrated under reduced pressure to give 0.13 g (48%) pure desired product as a whitish brown foam.

1. filtrationfiltered through Celite
2. washThe filtrate is washed with water, saturated NaHCO3, 10% K2CO3 and brine
3. dry with materialThe organic layer is dried (MgSO4)
4. concentrationconcentrated under reduced pressure