PROCESS FOR THE PREPARATION OF 2,3-DIFLUORO-6-NITROPHENOL

摘要

According to a process for producing isomer-free 2,3-difluor-6-nitrophenol, 2,3,4-trifluornitrobenzol is reacted with an aqueous solution of alkali metal or alkaline earth metal hydroxide in the absence of organic solvent, at temperatures between about 20.degree.C and 100.degree.C, the pH value of the reaction mixture is set at about 1 to 6 by acid addition, the resulting product is steam distilled and the 2,3-difluor-6-nitrophenol is isolated after cooling. No organic solvents are used during any of the steps of the process.