.alpha.,.alpha.,.alpha.-trifluoro-o-toluic fluoride is produced in good yield and high purity by reacting anhydrous hydrogen fluoride with 1,1,3,3-tetrachloro-1,3-dihydroisobenzofuran or a mixture of .alpha.,.alpha.,.alpha.-trichloro-o-toluic chloride therewith, the mixture being preferably produced by sufficiently photochlorinating o-toluic chloride in mild conditions.
通过将无
水氟化氢与1,1,3,3-四
氯-
1,3-二氢异苯并呋喃或其与.alpha.,.alpha.,.alpha.-三
氯-邻
甲苯酰
氯的混合物反应,可以高产率高纯度地制得.alpha.,.alpha.,.alpha.-三
氟-邻
甲苯酰
氟,最好的是通过在温和条件下充分光
氯化邻
甲苯酰
氯来制备该混合物。