| 摘要 |
PROBLEM TO BE SOLVED: To simply obtain the subject compound useful as an intermediate for medicines and agrochemicals from readily preparable raw materials by a short process by treating aminochlorobenzotrifluoride with an oxidizing agent in a solvent. SOLUTION: An aminochlorobenzotrifluoride of formula I (e.g. 4-amino-3- chlorobenzotrifluoride of formula II, etc.), is treated with an oxidizing agent (e.g. a peroxide such as sodium perborate, sodium percarbonate, etc.), in a solvent (preferably water, a lower alcohol, a lower carboxylic acid or a nitrile, to be concrete, especially methanol, acetic acid, etc., may be cited) to give the objective compound of formula III (e.g. a compound of formula IV). The amount of the solvent used is preferably 3-30 times as much as parts by weight of the compound of formula I and the amount of the oxidizing agent is preferably 1-20 equivalents based on the compound of formula I.
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