Process for the preparation of 2,4,5-trifluorobenzonitrile

Details Process for the preparation of 2,4,5-trifluorobenzonitrile Process for the preparation of 2,4,5-trifluorobenzonitrile

C - Chemistry, Metallurgy

07

C

C07C 255/50 (2006.01) C07C 253/30 (2006.01)

Patent

CA 2090768

HOE 92/F 051 Abstract of the disclosure: Process for the preparation of 2,4,5-trifluorobenzo- nitrile The present invention relates to a process for the preparation of 2,4,5-trifluorobenzonitrile in which 2,4- dichloro-5-fluorobenzonitrile is reacted with approxi- mately 100 to approximately 300 mol % of an alkali metal fluoride or of a tetraalkyl(C1-C18)ammonium fluoride or mixtures of such fluorides per chlorine atom to be exchanged, at temperatures from approximately 80 to approximately 250°C, in the presence of a phase transfer catalyst, if appropriate in a dipolar aprotic solvent.

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