Patent ID: 8039680
Filing Date: 2011-10-18
Classification: C07C

Abstract:
1. A process for producing 4-methyl-2,3,5,6 tetrafluorobenzyl alcohol comprising the following steps (A) to (D): Step (A): a step for fluorinating 2,3,5,6-tetrachloroterephthaloyl dichloride using potassium fluoride, wherein the potassium fluoride is a potassium fluoride composition obtained by mixing a mixture containing potassium fluoride and 5 to 50 parts by weight of methanol per 1 part by weight of potassium fluoride with an aprotic organic solvent having a boiling point higher than that of methanol, followed by removing methanol by distillation from the obtained mixture, Step (B): a step for reducing the product obtained in step (A), Step (C): a step for chlorinating the product obtained in step (B), and Step (D): a step for hydrogenating the product obtained in step (C).