Process for Production of 2,3,4-Trifluoro-5-(Iodo or Bromo)-Benzoic Acid
申请人:Koyano Hiroshi
公开号:US20090209785A1
公开(公告)日:2009-08-20
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.
PROCESS FOR PRODUCTION OF 2,3,4-TRIFLUORO-5-(IODO OR BROMO)BENZOIC ACID
申请人:CHUGAI SEIYAKU KABUSHIKI KAISHA
公开号:EP1870392A1
公开(公告)日:2007-12-26
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.