反应详情

Heat 3-bromo-4-fluorobenzoic acid (6.25 g, 26.2 mmol) in chlorosulfonic acid (15 mL) at 125° C. for 120 h. Cool to room temperature and add dropwise to about 125 mL ice water. Collect the filtered solid as the title compound.

1. customCollect the filtered solid as the title compound