反应详情

To a solution of methyl 6-[(3,3,3-trifluoropropyl)carbamoyl]nicotinate (2.4 g, 8.6 mmol) in N,N-dimethylformamide (10 mL) was added sodium hydride (60% suspension in mineral oil) (1.3 g). The reaction mixture was stirred at ambient temperature for 1 h. Methyl iodide (3.42 g, 5.0 mL, 24.1 mmol) was added and the reaction mixture was stirred over night and then added water (20 mL). The reaction mixture was stirred for another 30 min and then extracted with ethyl acetate (2×50 mL). The aqueous layer was acidified with citric acid and the formed precipitate was filtered off and dried in vacuum oven to yield 1.12 g (47%) of the title compound; 1H NMR (400 MHz, CDCl3) δ ppm 9.26 (d, 1 H), 8.49 (d, 1 H), 7.78-7.91 (dd, 1 H), 3.80 (t, 1 H), 3.61-3.73 (m, 1 H), 3.16 (d, 3 H), 2.46-2.76 (m, 2 H); MS (ESI) m/z 277[M+H+].

1. stirringthe reaction mixture was stirred over night
2. stirringThe reaction mixture was stirred for another 30 min
3. extractionextracted with ethyl acetate (2×50 mL)
4. filtrationthe formed precipitate was filtered off
5. customdried in vacuum oven