反应详情

温度

40 °C

To a mixed solution of the compound (0.30 g) obtained in Step 1, potassium thiocyanate (0.77 g) and N,N-dimethylformamide (6.0 ml) was added pyridine (0.29 ml) at 90° C. After allowing to cool to 40° C., a mixed solution of bromine (0.15 ml) and N,N-dimethylformamide (1.0 ml) was added, and the mixture was stirred at room temperature for 1 hr. Under ice-cooling, water (12 ml) was added to the reaction solution, and the precipitated solid was collected by filtration, washed with water and dried to give the title compound (0.40 g).

1. temperatureUnder ice-cooling
2. filtrationthe precipitated solid was collected by filtration
3. washwashed with water
4. customdried