PROCESS FOR THE PREPARATION OF UTILIZED BENZENOSULFONIC ACID DERIVATIVES IN COMBATING PHYTOPATHOGENIC MICROORGANISMS

摘要

Novel benzotriazolesulphonic acid derivatives of the formula IMAGE in which: R1 is hydrogen, halogen, C1-C4-alkyl, C1-C4-alkoxy, C1-C4-haloalkoxy having at least two identical or different halogen atoms, furthermore CF3, nitro or the group N(R')R'' where R' and R'' independently of one another are C1-C4-alkyl; R2 is phenoxy or phenylthio, each of which is unsubstituted or monosubstituted to trisubstituted by halogen, C1-C4-alkyl, C1-C4-alkoxy, C1-C4-haloalkoxy having at least two identical or different halogen atoms, furthermore substituted by cyano, nitro, C2-C4-alkenyl, C2-C4-alkynyl, phenyl, 2-phenylethynyl or a further phenoxy radical which is unsubstituted or substituted by halogen, C1-C4-alkyl and/or C1-C4-alkoxy; or R2 is the radical O-CH2-O; R3 is alkyl, aryl or aralkyl having not more than 14 atoms, these radicals being substituted by halogen, C1-C4-alkyl and/or nitro; including the position isomers of R1 and R2 if these substituents occupy position 5 or 6. The novel active substances have crop-protecting properties and are particularly suitable for protecting plants against attack by phytopathogenic microorganisms such as fungi, in particular Oomycetes.