Patent ID: 8242313

Claim:
A process for preparing a compound of formula (I), in which R 4 is hydrogen, —(C═O)alkyl, (C═O)haloalkyl, —(C═O)O-alkyl, SO 2 alkyl, SO 2 -haloalkyl, SO 2 -aryl, X is halogen, R 5 is alkoxy, dialkylamino where the alkyl groups may optionally form a ring which may optionally contain 1-2 further heteroatoms from the group of O, N, S, or is cycloalkylamino, thioalkyl, said process comprising reacting a compound of formula (III) in which R 5 is as defined above and X and Y are independently fluorine, chlorine, bromine or iodine, with a compound of formula (II) KatOR 4 (II) in which Kat is a cation, and is Li, Na, K, Cs, (alkyl) 4 N, (alkyl) 4 P, (aryl) 4 P, R 4 is hydrogen, —(C═O)alkyl, (C═O)haloalkyl, —(C═O)O-alkyl, SO 2 alkyl, SO 2 -haloalkyl, SO 2 -aryl.