Process for the preparation of fluoromethyl pyridines

Details Process for the preparation of fluoromethyl pyridines Process for the preparation of fluoromethyl pyridines

C - Chemistry, Metallurgy

07

D

260/295.2

C07D 213/61 (2006.01)

Patent

CA 1183854

23 ABSTRACT Fluoromethylpyridines of the formula: Image wherein the group FnH3-nC- may be ortho, meta or para to the ring nitrogen atom, n is 1, 2 or 3, m is 1 to 4, X is Cl, Br, I or F and, when m is 2, 3 or 4 the substituents represented by X may be the same or different, at least one X being ortho or para to the FnH3-nC- group, are prepared by reacting a compound of the formula: Image wherein Y is Cl, Br, I or F and m is 1 to 4, with potassium fluoride in a polar aprotic solvent under substantially anhydrous conditions. These fluoromethylpyridines are useful as intermediates for herbicides. 3,4,5-trifluro-2- trifluoromethylpyridine and 2,6-difluoro-3-difluoromethyl pyridine are novel compounds.

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