反应详情

温度

60 °C

A mixture of 4-fluoro-3-nitrobenzotrifluoride (1a, 1.0 g, 4.78 mmol), methyl 4-hydroxyphenylacetate (1b, 795 mg, 4.78 mmol) and potassium carbonate (661 mg, 4.78 mmol) in 10 mL of DMSO was allowed to stir at 60° C. for 24 h. Upon completion, the mixture was cooled to room temperature and 50 mL of water was added. The resulting mixture was extracted with ethyl acetate (3×30 mL). The combined extracts were washed with water (2×30 mL) and brine, dried over anhydrous sodium sulfate and concentrated in vacuo. The residue was chromatographed on a silica gel column using 20% EtOAc/hexane as the eluent to give 1.31 g of [4-(2-nitro-4-trifluoromethyl-phenoxy)-phenyl]-acetic acid methyl ester. 1H NMR (CDCl3): δ 8.22 (d, J=2.00 Hz, 1H), 7.70 (dd, J=8.8, 2.2 Hz, 1H), 7.36 (d, J=8.36 Hz, 2H), 7.08 9s, 1H), 7.07 (d, J=8.48 Hz, 2H).

1. temperatureUpon completion, the mixture was cooled to room temperature
2. extractionThe resulting mixture was extracted with ethyl acetate (3×30 mL)
3. washThe combined extracts were washed with water (2×30 mL) and brine
4. dry with materialdried over anhydrous sodium sulfate
5. concentrationconcentrated in vacuo
6. customThe residue was chromatographed on a silica gel column