反应详情

8.56 g (42.99 mmol) of 2-methyl-5-fluoro-3-nitrobenzoic acid is added in 76 ml of N,N-dimethylformamide and mixed with 9.15 g (64.48 mmol) of methyl iodide and 8.91 g (64.48 mmol) of potassium carbonate. After 65 hours of stirring at room temperature, the reaction mixture is added to ice water and extracted several times with ethyl acetate. The combined organic extracts are washed with water and brine. After drying (sodium sulfate), desiccant is suctioned out, and the solvent is spun off. Repeated chromatography on silica gel (mobile solvent:ethyl acetate/hexane) yields the desired compound, specifically in a yield of 25.9% (2.37 g).

1. extractionextracted several times with ethyl acetate
2. washThe combined organic extracts are washed with water and brine
3. dry with materialAfter drying (sodium sulfate)