Process for producing 1,1,3,3-tetrafluoro-1,3-dihydro-isobenzofuran.

摘要

1,1,3,3-Tetrafluoro-1,3-dihydro-isobenzofuran is produced easily in good yield and high purity by allowing α,α,α-trichloro-o-toluic chloride to react with anhydrous hydrogen fluoride at an amount ratio of 4 moles or slight excess of the latter to 1 mole of the former.