2-BroMo-4-fluoro-5-nitrobenzoic Acid

1006-41-3

1036389-83-9

Fuming nitric acid (4 mL, 45.60 mmol) was slowly added dropwise to a mixed solution containing 2-bromo-4-fluorobenzoic acid (10 g, 45.66 mmol) and concentrated sulfuric acid (34 mL) under cooling conditions in an ice bath. Upon completion of the reaction, the reaction mixture was poured into ice water and stirred vigorously for 1 hour. The precipitate was collected by filtration, washed with ice water and dried to give 10.40 g of white solid product. It was further washed with water and evaporated to dryness to finally obtain 2-bromo-4-fluoro-5-nitrobenzoic acid in white solid form in 86% yield.