Abstract: Substituted piperidines, processes for their preparation and their use as pesticides and fungicides. The invention relates to substituted piperidines of the formula in which R1 is H, halogen, alkyl, haloalkyl or cycloalkyl; R2 and R3 are as defined in the description; A is CH or N; X is NH, O or S(O)q where q=0, 1 or 2; Y and Z are O, S or optionally substituted imino; m and n are 1, 2, 3, 4 or 5; R4 and R4′ are H, alkyl, haloalkyl, halogen or alkoxy; R5 is optionally substituted alkyl, alkenyl, alkynyl, aryl or heterocyclyl in which one or more carbon units can be replaced by CO or by hetero atom units; to processes for their preparation, to compositions comprising them and to their use as pesticides and fungicides.

Abstract: Compounds of formula I where R1 is hydrogen, chlorine, fluorine or methyl, R2 and R3, which may be the same or different from each other, are hydrogen, halogen, cyano, (C1-C4)-alkyl, vinyl, ethynyl, (C1-C4)-alkoxy, (C1-C4)-alkoxy-(C1-C4)-alkyl, fluorovinyl or fluoroethyl, or R2 and R3 together with the linking carbon atoms form a benzo ring, and R4 is (C2-C4)-alkyl, (C2-C4)-alkenyl or (C3-C4)-alkinyl, each of which is substituted by at least two fluorine atoms and optionally substituted by C1-4-alkoxy, cyanomethoxy, (C3-C4)-alkenyloxy or (C3-C4)-alkinyloxy, are useful as pesticides, especially against insects, acarids and fungi. The invention includes a novel process for fluorinating certain pyrimidines.