Patent ID: 7238722

Claim:
Process for preparing compounds of the formula (I) in which R 1 is hydrogen, C 1 -C 12 -alkyl, C 5 -C 14 -aryl, C 6 -C 15 -arylalkyl, C 1 -C 12 -fluoroalkyl or radicals of the formula (II) (C 1 -C 8 -alkylene)-B-D-E (II) and R 2 and R 3 are each independently hydrogen, C 1 -C 12 -alkyl, C 1 -C 12 -alkoxy, C 5 -C 14 -aryl, C 5 -C 14 -aryloxy, C 6 -C 15 -arylalkyl, C 6 -C 15 -arylalkoxy, chlorine, fluorine, cyano, free or protected formyl, C 1 -C 12 -fluoroalkyl, C 1 -C 12 -fluoroalkylthio, C 1 -C 12 -fluoroalkoxy or radicals of the formulae (IIIa) to (IIIf) A-B-D-E (IIIa) A-E (IIIb) A-SO 2 -E (IIIc) A-B-SO 2 R 5 (IIId) A-SO 3 W (IIIe) A-COW (IIIf) where, in the formulae (II) and (IIIa) to (IIIf), A is absent or is a C 1 -C 8 -alkylene, C 1 -C 8 -alkenylene or C 1 -C 8 -fluoroalkylene radical and B is absent or is oxygen, sulphur or NR 4 where R 4 is hydrogen, C 1 -C 8 -alkyl, C 6 -C 15 -arylalkyl or C 5 -C 14 -aryl and D is a carbonyl group and E is R 5 , OR 5 , NHR 6 or N(R 6 ) 2 , where R 5 is C 1 -C 8 -alkyl, C 6 -C 15 -arylalkyl or C 5 -C 14 -aryl and R 6 is in each case independently C 1 -C 8 -alkyl, C 6 -C 15 -arylalkyl or C 6 -C 14 -aryl, or N(R 6 ) 2 together is a cyclic amino radical having 4 to 12 carbon atoms and W is OH, NH 2 or OM where M is an alkali metal ion, half an equivalent of an alkaline earth metal ion, an ammonium ion or an organic ammonium ion and Ar is a mono-, bi- or tricyclic aromatic radical having a total of 5 to 18 ring atoms, and in which at most one ring atom per cycle is selected from the group of oxygen, sulphur and nitrogen, and the mono-, bi- or tricyclic aromatic radical is optionally mono- or polysubstituted, comprising in one step, a), converting the compounds of the formula (IV) in which R 1 , R 2 and R 3 are each independently as defined above, by halogenation and elimination to compounds of the formula (V) in which R 1 , R 2 and R 3 are each independently as defined above and in one step, b), converting the compounds of the formula (V) to compounds of the formula (I) by reacting with compounds of the formula (VI) Hal-Ar (VI) in which Ar is as defined above and Hal is iodine, bromine or chloroine, in the presence of a catalyst.