| 摘要 |
Fluoro-substituted aromatic carboxylic acids, and particular 2- and 4-fluorobenzoic acid can be made from the corresponding fluoro-methyl compound such as fluorotoluene in a single stage by reaction at elevated temperature, preferably of at least 80.degree.C with hydrogen peroxide and bromide in mole ratios to the substrate of greater than 2:1, and preferably around 3:1, in the presence of means capable of generating bromine free radicals from bromine molecules, such as radiation having a wavelength of not greater than 600 nm or an organic peroxide.
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