反应详情

温度

95 °C

N-[4-chloro-2-(pyridine-3-carbonyl )-phenyl]-2,2-dimethyl-propionamide (0.65 g) was suspended in 5 mL of 70% H2SO4 and heated at 95° C. in oil bath overnight. After cooling to room temperature the solution was added drop wise with stirring to 20 mL of 40% NaOH solution placed in an ice-water bath. The fine yellow precipitate formed was collected by vacuum filtration, washed well with water and dried under vacuum to give 370 mg of product. 1H NMR (CDCl3) δ 8.84 (dd, J=2.4 Hz, 0.8 Hz, 1H) 8.77 (dd, J=4.8 Hz, 2.0 Hz, 1H) 7.93 (dt, J=8.4 Hz, 2.0 Hz, 1H) 7.43 (m, 1H) 7.35 (d, J=2.0 Hz, 1H) 7.25 (d, J=0.8 Hz, 1H) 6.71 (d, J=8.8 Hz, 1H) 6.21 (s, 2H) MS (ES) m/z=233.0 (MH)+

1. temperatureAfter cooling to room temperature the solution
2. additionwas added drop wise
3. customplaced in an ice-water bath
4. customThe fine yellow precipitate formed
5. filtrationwas collected by vacuum filtration
6. washwashed well with water
7. customdried under vacuum