反应详情

To a suspension of 2-amino-3-fluorobenzoic acid (5 g, 32.2 mmol) in chloroform (200 mL) was added dropwise bromine (1.1 equiv.) in chloroform (125 mL) solution. The mixture was stirred at room temperature for 16 hrs. The resulting white solid was collected by filtration and washed thoroughly with methylene chloride until the filtrate was colorless. The solid was air-dried to give 9.6 g of white powder as HBr salt of 2-amino-5-bromo-3-fluorobenzoic acid (95% yield). ES/MS m/z 234/236 (MH+).

1. filtrationThe resulting white solid was collected by filtration
2. washwashed thoroughly with methylene chloride until the filtrate
3. customThe solid was air-dried