Process for the preparation of 2,3-difluoro-6-nitrophenol

Details Process for the preparation of 2,3-difluoro-6-nitrophenol Process for the preparation of 2,3-difluoro-6-nitrophenol

C - Chemistry, Metallurgy

07

C

C07C 205/26 (2006.01) C07C 201/12 (2006.01)

Patent

CA 2092407

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°C and 100°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.

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