Patent ID: 8404855

Claim:
A method for the manufacture of a compound of the formula (I) in which A represents pyrid-3-yl which is optionally substituted in the 6-position by fluorine, chlorine, bromine or trifluoromethyl, or represents 1,3-thiazol-5-yl which is optionally substituted in the 2-position by chlorine; B represents oxygen, sulphur or methylene; R 1 represents halo-C 1 -C 3 -alkyl or halo-C 2 -C 3 -alkenyl; R 2 represents hydrogen or halogen; and R 3 represents hydrogen or methyl; which method comprises reacting a compound of the formula (II) in which B represents oxygen, sulphur or methylene; R 2 represents hydrogen or halogen; and R 3 represents hydrogen or methyl; with a compound of the formula (III) HN(R 1 )—CH 2 -A (III) in which A represents pyrid-3-yl which is optionally substituted in the 6-position by fluorine, chlorine, bromine or trifluoromethyl, or represents 1,3-thiazol-5-yl which is optionally substituted in the 2-position by chlorine; and R 1 represents halo-C 1 -C 3 -alkyl or halo-C 2 -C 3 -alkenyl; in the presence of an acidic auxiliary selected from p-toluenesulfonic acid or acetic acid, optionally in the presence of a suitable diluent.