Patent ID: 6841679

Claim:
A process for preparing compounds of the general formula (6) in which: Y denotes hydrogen, a halogen or a C 1-4 alkyl group; X 1 and X 2 denote, independently of each other, hydrogen, a halogen or a C 1-4 alkoxy, C 1-6 alkyl, CF 3 , CH 3 S, CH 3 SO 2 or NO 2 group and R 1 and R 2 denote, independently of each other, hydrogen or a C 1-5 alkyl group, with the proviso that R 1 and R 2 do not both denote hydrogen, which process comprises reacting a compound of the general formula (2) in which Y, X 1 and X 2 , are as defined above with a compound of the general formula (3) in which: A denotes a halogen and B denotes a halogen, a C 1-4 alkoxy group or an NR 1 R 2 group in which R 1 and R 2 are as defined above to form a compound of the general formula (4) in which Y, X 1 X 2 and B are as defined above and, if B denotes a halogen or a C 1-4 alkoxy group, reacting the compound of formula (4) with a compound of the general formula (5) in which R 1 and R 2 are as defined above.