Patent ID: 8859786

Claim:
A method (B) for the preparation of a compound of formula (II); R1 is Cl, Br or CN; method (B) comprises a step (C) and a step (B); step (B) is done after step (C); step (C) comprises a reaction (C) of a compound of formula (VI) with a compound (C) to provide a compound of formula (IV); the compound (C) is selected from the group consisting of Cl 2 , Br 2 and ClBr; step (B) comprises a reaction (B) of the compound of formula (IV), which has been prepared in step (C), with a compound of formula (V) in the presence of a base (B); R1-IV and R3 are identical and are Cl or Br; base (B) is selected from the group consisting of N(R4)(R6)R6, 1,4-diazabicyclo[2.2.2]octane, 1,8-diazabicyclo[5.4.0]undec-7-ene, pyridine, pyridine substituted with 1 or 2 independently selected identical or different C 1-2 alkyl residues, N,N-dimethyl-4-pyridinamine, morpholine, 4-methylmorpholine, 1-methylpiperidine, imidazol, benzimidazol, 2-methylimidazole, 4-methylimidazole, 2-ethylimidazole, 2-ethyl-4-methylimidazole, 2-isopropylimidazole, 2-phenylimidazole, 4-phenylimidazole, picoline, and mixtures thereof; R4, R5, R6 are identical or different and independently from each other selected from the group consisting of H, C 1-15 alkyl, C 5-6 cycloalkyl, (C(R16)R17) m N(R12)R13 and phenyl, with the proviso, that at least one of the residues R4, R5 or R6 is not H; R12 and R13 are identical or different and independently from each other H or C 1-15 alkyl; m is 2, 3, 4, 5 or 6; R16 and R17 are identical or different and independently from each other selected from the group consisting of H, methyl and ethyl; with the proviso, that if R1 in formula (II) is CN, then step (B) comprises additionally a reaction (B-add), the reaction (B-add) is done after the reaction (B), of the reaction product of the reaction (B) with a compound (B); compound (B) is selected from the group consisting of NaCN, KCN, Si(R9)(R10)(R11)CN, HCN, tetrabutylammonium cyanide, 1-cyano benzotriazole and triselenium dicyanide and mixtures thereof; R9, R10 and R11 are identical or different and independently from each other selected from the group consisting of C 1-4 alkyl and phenyl.