| abstract |
The invention relates to a process for the preparation of a compound of formula (V), according to the following scheme, wherein the various substituents are as defined in the description. A process for the preparation of a compound of general formula (I), or a salt thereof, which process comprises the catalytic hydrogenation of a compound of general formula (II), or a salt thereof, wherein X is halogen; each Y, which may be the same or different, is halogen, haloalkyl, alkoxycarbonyl or alkylsulphonyl; and n is 0 to 3. |