Process for the preparation of chlorinated and fluorinated...

Details Process for the preparation of chlorinated and fluorinated... Process for the preparation of chlorinated and fluorinated...

C - Chemistry, Metallurgy

07

C

C07C 69/76 (2006.01) C07B 39/00 (2006.01) C07C 67/307 (2006.01) C07C 253/30 (2006.01) C07C 255/50 (2006.01)

Patent

CA 2078604

1 Abstract HOE 91/F 306 A process for the preparation of chlorinated and fluorinated benzene compounds of the general formula (1) Image in which R denotes -CN or -COOalkyl(C1-C6), and X and Y each denote chlorine or fluorine, X and Y being not identical, by fluorodenitration, which comprises reacting a compound of the formula (2) Image in which R is defined as above, and X' and Y' each denote chlorine or nitro, X' and Y' being nor identical, with potassium fluoride in a dipolar aprotic solvent in the presence of a transfer catalyst at a temperature from about 50°C to about 250°C.

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