The invention provides a process for production of 2,3,4-trifluoro-5-(iodo or bromo)benzoic acid, the process comprising a halogenation step in which direct iodination or bromination of 2,3,4-trifluorobenzoic acid is performed with an iodinating agent or brominating agent in a reaction solvent in the presence of an oxidizing agent. According to the invention, there is provided a process for convenient production of 2,3,4-trifluoro-5-(iodo or bromo)benzoic acid in high yield and high purity in a highly regioselective manner.
本发明提供了一种2,3,4-三
氟-5-(
碘或
溴)
苯甲酸的生产工艺,该工艺包括在卤化步骤中,通过在反应溶剂中使用氧化剂的存在下,使用
碘化剂或
溴化剂直接卤代
2,3,4-三氟苯甲酸。根据本发明,提供了一种方便高产高纯度、高区域选择性地生产2,3,4-三
氟-5-(
碘或
溴)
苯甲酸的工艺。