| 摘要 |
Trifluoromethylbenzoic acid is obtained at high yield from alpha , alpha , alpha , alpha ', alpha ', alpha '-hexafluoroxylene, which is a relatively inexpensive compound, by reacting this compound with a strong acid in sulfuric acid which is at least partly fuming sulfuric acid. It is best to use fuming sulfuric acid as the strong acid. The reaction temperature ranges from room temperature to 150 DEG C., though temperatures below 100 DEG C. are preferable. By this reaction only one trifluoromethyl group of hexafluoroxylene is hydrolyzed so far as the strong acid is not in large excess.
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