Patent ID: 8637673

Claim:
A process for preparing 2,2-difluoroethylamine derivatives, comprising hydrogenating 2,2-difluoroethylimine derivatives of formula (IV) to a corresponding 2,2-difluoroethylamine derivative of formula (III): where the A radical in formulae (III) and (IV) is: pyrid-2-yl or pyrid-4-yl, or pyrid-3-yl which is optionally 6-substituted by fluorine, chlorine, bromine, methyl, trifluoromethyl or trifluoromethoxy, or pyridazin-3-yl which is optionally 6-substituted by chlorine or methyl, or pyrazin-3-yl, or 2-chloropyrazin-5-yl, or 1,3-thiazol-5-yl which is optionally 2-substituted by chlorine or methyl, or is pyrimidinyl, pyrazolyl, thiophenyl, oxazolyl, isoxazolyl, 1,2,4-oxadiazolyl, isothiazolyl, 1,2,4-triazolyl or 1,2,5-thiadiazolyl, which is optionally substituted by fluorine, chlorine, bromine, cyano, nitro, C 1 -C 4 -alkyl, which is optionally substituted by fluorine and/or chlorine, C 1 -C 3 -alkylthio, which is optionally substituted by fluorine and/or chlorine, or C 1 -C 3 -alkylsulphonyl, which is optionally substituted by fluorine and/or chlorine, or is in which X is halogen, alkyl or haloalkyl and Y is halogen, alkyl, haloalkyl, haloalkoxy, azido or cyano, and R 1 and R 2 are each independently H or C 1 -C 6 -alkyl.