BENZOYLTHIAZOLYLEDDIKESYRE- ELLER THIOEDDIKESYREDERIVATER TIL ANVENDELSE I BIOCIDE MIDLER SAMT FREMGANGSMAADE TIL FREMSTILLING AF SAADANNE DERIVATER

The derivatives of the formula I of the formula sheet, in which R1 and R2 independently of one another are hydrogen, halogen or an alkoxy radical having 1-4 carbon atoms, Y is oxygen or sulphur, Z is the radical OR4, SR4 or R5NR6 where R4 is a straight-chain or branched, saturated or unsaturated hydrocarbon radical which has 1 to 20 carbon atoms and which is unsubstituted or monosubstituted or polysubstituted by halo-, alkoxy- or alkoxycarbonyl having 1 to 4 carbon atoms in the alkyl chain, or is a cyclic hydrocarbon radical which can be substituted by alkyl or alkoxycarbonyl radicals having 1-4 carbon atoms in the alkyl chain, and R5 and R6 independently of one another are an alkyl or alkoxycarbonyl radical having 1-4 carbon atoms in the alkyl chain, a phenyl radical, or R5 and R6 together with the nitrogen atom are a morpholino ring which can be substituted by alkyl radicals having 1-4 carbon atoms, and the phytophysiologically acceptable salts and metal complexes thereof, their preparation, and biocidal compositions containing them, their preparation, and their use.