反应详情

To a 50 mL round bottom flask, 2-fluoro-4-nitrobenzoic acid (3.0 g, 0.0162 mol) and DMF (10 mL) was added. To the same flask, TEA (4.6 mL, 0.0324 mol), dimethylamine hydrochloride (2.65 g, 0.0324 mol), HOBt (3.28 g, 0.0243 mol) and EDCI.HCl(4.62 g, 0.0243 mol) was added. The reaction mixture was stirred at room temperature for 12 h. The reaction mass was quenched with water and extracted with ethyl acetate. The organic layer was dried over anhydrous sodium sulfate and evaporated under reduced pressure to get the title compound [2.8 g, 81%]. 1H NMR (300 MHz, CDCl3): δ 8.12 (d, J=8.4 Hz, 1H), 8.02 (d, J=8.7 Hz, 1H), 7.62 (dd, J′=8.1 Hz, J″=6.6 Hz, 1H), 3.16 (s, 3H), 2.93 (s, 3H); LC-MS (ESI): Calculated mass: 212.1; Observed mass: 213.1 (RT: 0.37 min).

1. customThe reaction mass was quenched with water
2. extractionextracted with ethyl acetate
3. dry with materialThe organic layer was dried over anhydrous sodium sulfate
4. customevaporated under reduced pressure