反应详情

温度

95 °C

Following the procedure of J. Med. Chem. 2006, 49, 1173, a solution of commercially available 2-fluoronitrobenzene (10.00 g, 70.87 mmol) and chlorosulfonic acid (21 mL) were heated to reflux for 18 hours at 95° C. and then cooled to room temperature. The solution was then added dropwise over a 1 hour period to a solution of iPrOH (225 mL) and concentrated aqueous NH4OH (54 mL) at −35° C. and stirred for 0.5 hours. The solution was maintained at −35° C. while concentrated aqueous HCl was added until the pH was acidic. The solution was then evaporated to remove some iPrOH, water was added and the solution was evaporated again to remove most of the iPrOH. More water was added, the solution was filtered and the solid was washed with 1 N aqueous HCl and water to give the title compound.

1. temperaturecooled to room temperature
2. additionwas added until the pH
3. customThe solution was then evaporated
4. customto remove some iPrOH, water
5. additionwas added
6. customthe solution was evaporated again
7. customto remove most of the iPrOH
8. additionMore water was added
9. filtrationthe solution was filtered
10. washthe solid was washed with 1 N aqueous HCl and water