反应详情

Into a round bottom flask, 2-fluoro-5-methoxy-4-nitro-benzoic acid (2.84 g, 0.0132 mol;), toluene (25 mL, 0.23 mol), methanol (5 mL, 0.1 mol;) were added. 2.00 M of trimethylsilyldiazomethane in ether (7.92 mL) was added drop wise at 5° C. The reaction was stirred at room temperature for 2 hours. The solvent was removed under vacuum to afford a yellow solid. The solid was triturated with 10% Et2O and hexane to give 2-fluoro-5-methoxy-4-nitro-benzoic acid methyl ester as an off white solid (2.84, 93%). 1H-NMR (DMSO-D6, 400 MHz): δ 8.06 (d, 1H), 7.70 (d, 1H). 4.14 (s, 3H), 3.91 (s, 3H).

1. customThe solvent was removed under vacuum
2. customto afford a yellow solid
3. customThe solid was triturated with 10% Et2O and hexane