反应详情

温度

23 °C

To a suspension of N-(pyridin-2-yl)thiazol-2-amine (4.26 g, 24 mmol) and sodium thiocyanate (3.9 g, 48 mmol, 2 eq) in methanol (100 mL) at 0° C., was slowly added bromine (1.23 mL, 24 mmol, 1 eq) over 2 min, then the temperature was raised to 23° C. and the mixture was stirred for 3 h. The resulting suspension was added to stirring cold water (400 mL) and the resulting precipitate was collected by filtration and vacuum dried (4.5 g, 80%). 1H NMR (400 MHz, DMSO-D6) δ ppm 7.00-7.08 (1H, m), 7.11 (1H, d, J=8.34 Hz), 7.74-7.84 (1H, m), 7.89 (1H, s), 8.39 (1H, d, J=5.05 Hz), 11.93 (1H, s). LC/MS (M+H)+: 235.

1. customover 2 min
2. additionThe resulting suspension was added
3. filtrationthe resulting precipitate was collected by filtration and vacuum
4. customdried (4.5 g, 80%)