3-aryl-tetronic acid derivatives, the production thereof and the use thereof as antiparasitic agents

A compound of the formula (I) ##STR63## in which A and B represent C.sub.4 -C.sub.6 -alkanediyl which is optionally monosubstituted or polysubstituted by identical or different substituents selected from the group consisting of halogen, C.sub.1 -C.sub.8 -alkyl, C.sub.3 -C.sub.8 -cycloalkyl, C.sub.1 -C.sub.8 -halogenoalkyl, C.sub.1 -C.sub.6 -alkoxy, C.sub.1 -C.sub.6 -alkylthio or phenyl and in which one or two carbon atoms which are not directly adjacent are replaced by the group ##STR64## or oxygen or sulphur, X represents C.sub.1 -C.sub.6 -alkyl, halogen or C.sub.1 -C.sub.6 -alkoxy,

• Y represents hydrogen, C.sub.1 -C.sub.6 -alkyl, halogen, C.sub.1 -C.sub.6 -alkoxy or C.sub.1 -C.sub.3 -halogenoalkyl,
• Z represents C.sub.1 -C.sub.6 -alkyl, halogen or C.sub.1 -C.sub.6 -alkoxy,
• G represents hydrogen (a) or one of the groups ##STR65## in which E represents a metal ion equivalent or an ammonium ion,
• L represents oxygen or sulphur and
• M represents oxygen or sulphur,
• R.sup.1 represents C.sub.1 -C.sub.20 -alkyl, C.sub.2 -C.sub.20 -alkenyl, C.sub.1 -C.sub.8 -alkoxy-C.sub.1 -C.sub.8 -alkyl, C.sub.1 -C.sub.8 -alkylthio-C.sub.1 -C.sub.8 -alkyl or poly-C.sub.1 -C.sub.8 -alkoxy-C.sub.2 -C.sub.8 -alkyl, each of which is optionally monosubstituted or polysubstituted by halogen, or represents C.sub.3 -C.sub.8 -cycloalkyl which is optionally substituted by halogen, C.sub.1 -C.sub.6 -alkyl or C.sub.1 -C.sub.6 -alkoxy and in which one or two methylene groups which are not directly adjacent are optionally replaced by oxygen or sulphur,
• or represents phenyl which is optionally monosubstituted to pentasubstituted by halogen, nitro, C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkoxy, C.sub.1 -C.sub.6 -halogenoalkyl, C.sub.1 -C.sub.6 -halogenoalkoxy, C.sub.1 -C.sub.6 -alkylthio or C.sub.1 -C.sub.6 -alkylsulphonyl,
• or represents phenyl-C.sub.1 -C.sub.6 -alkyl which is optionally monosubstituted to pentasubstituted by halogen, C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkoxy, C.sub.1 -C.sub.6 -halogenoalkyl or C.sub.1 -C.sub.6 -halogenoalkoxy,
• or represents pyridyl, thienyl, furanyl, pyrazolyl, pyrimidyl or thiazolyl, each of which is optionally monosubstituted or disubstituted by halogen or C.sub.1 -C.sub.6 -alkyl,
• or represents phenoxy-C.sub.1 -C.sub.6 -alkyl which is optionally monosubstituted to trisubstituted by halogen or C.sub.1 -C.sub.6 -alkyl,
• or represents pyridinyloxy-C.sub.1 -C.sub.6 -alkyl, pyrimidinyloxy-C.sub.1 -C.sub.6 -alkyl or thiazolyloxy-C.sub.1 -C.sub.6 -alkyl, each of which is optionally monosubstituted or disubstituted by halogen, amino or C.sub.1 -C.sub.6 -alkyl,
• R.sup.2 represents C.sub.1 -C.sub.20 -alkyl, C.sub.2 -C.sub.20 -alkenyl, C.sub.1 -C.sub.8 -alkoxy-C.sub.2 -C.sub.8 -alkyl or poly-C.sub.1 -C.sub.8 -alkoxy-C.sub.2 -C.sub.8 -alkyl, each of which is optionally monosubstituted or polysubstituted by halogen,
• or represents C.sub.3 -C.sub.8 -cycloalkyl which is optionally monosubstituted or polysubstituted by halogen, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy,
• or represents phenyl or benzyl, each of which is optionally monosubstituted to trisubstituted by halogen, nitro, C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkoxy or C.sub.1 -C.sub.6 -halogenoalkyl,
• R.sup.3 represents C.sub.1 -C.sub.8 -alkyl which is optionally monosubstituted or polysubstituted by halogen, or represents phenyl or benzyl, each of which is optionally monosubstituted or polysubstituted by halogen, C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkoxy, C.sub.1 -C.sub.4 -halogenoalkyl, C.sub.1 -C.sub.4 -halogenoalkoxy, cyano or nitro,
• R.sup.4 and R.sup.5 independently of one another represent C.sub.1 -C.sub.8 -alkyl, C.sub.1 -C.sub.8 -alkoxy, C.sub.1 -C.sub.8 -alkylamino, di-(C.sub.1 -C.sub.8)-alkylamino, C.sub.1 -C.sub.8 -alkylthio, C.sub.3 -C.sub.6 -alkenylthio or C.sub.3 -C.sub.7 -cycloalkylthio, each of which is optionally monosubstituted or polysubstituted by halogen,
• or represent phenyl, phenoxy or phenylthio, each of which is optionally monosubstituted or polysubstituted by halogen, nitro, cyano, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -halogenoalkoxy, C.sub.1 -C.sub.4 -alkylthio, C.sub.1 -C.sub.4 -halogenoalkylthio, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -halogenoalkyl,
• R.sup.6 and R.sup.7 independently of one another represent hydrogen,
• or represent C.sub.1 -C.sub.8 -alkyl, C.sub.3 -C.sub.8 -cycloalkyl, C.sub.1 -C.sub.8 -alkoxy, C.sub.3 -C.sub.8 -alkenyl or C.sub.1 -C.sub.8 -alkoxy-C.sub.1 -C.sub.8 -alkyl, each of which is optionally monosubstituted or polysubstituted by halogen,
• or represent phenyl or benzyl, each of which is optionally monosubstituted to trisubstituted by halogen, C.sub.1 -C.sub.8 -alkyl, C.sub.1 -C.sub.8 -halogenoalkyl or C.sub.1 -C.sub.8 -alkoxy, or together represent a C.sub.2 -C.sub.6 -alkanediyl radical which is optionally interrupted by oxygen or sulphur,
• R.sup.9 represents hydrogen, Q, COQ or CO.sub.2 Q,
• where
• Q can assume the meanings which have been mentioned above as being preferred for R.sup.2 and
• n represents 0, 1 or 2.