Claims
- 1. A compound of formula I: ##STR15## wherein A represents an optionally substituted pyrazyl ring optionally substituted phenyl or naphthyl group said optional substituents being selected from the group consisting of halogen, nitro, cyano, amino, hydroxyl, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, C.sub.1-4 haloalkyl, C.sub.1-4 haloalkylthio, C.sub.1-4 haloalkoxy, C.sub.2-4 A haloalkenyl, and halosulfanyl having up to 5 halogen atoms;
- B represents an optionally substituted phenyl or naphthyl group said optional substituents being selected from the group consisting of halogen, nitro, cyano, amino, hydroxyl, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, C.sub.1-4 haloalkyl, C.sub.1-4 haloalkylthio, C.sub.1-4 haloalkoxy, C.sub.2-4 A haloalkenyl, and halosulfanyl having up to 5 halogen atoms;
- n represents an integer from 0 to 2;
- R represents a hydrogen atom, a halogen atom, an optionally substituted alkyl, alkenyl, alkynyl, alkoxy, alkoxyalkyl, dialkoxyalkyl, alkoxyalkoxy, alkylthio, amino, alkylamino, dialkylamino or alkoxyamino group or a formamidino or cyano group;
- X.sub.1 and X.sub.2 independently represent an oxygen or sulphur atom.
- 2. A compound as claimed in claim 1, wherein A is a group of formula ##STR16## wherein R.sub.9 is hydrogen, fluoro or chloro; R.sub.7 is C.sub.1-3 alkyl; and R.sub.8 is C.sub.1-4 alkyl, C.sub.1-3 haloalkyl, a halogen atom, C.sub.1-3 haloalkylthio or C.sub.1-3 haloalkoxy.
- 3. A compound as claimed in claim 2, wherein B represents a optionally substituted phenyl or a 1-5 fold substituted phenyl group, wherein the substituents independently are C.sub.1-4 alkyl, C.sub.1-4 haloalkyl, C.sub.1-4 alkoxy, C.sub.1-4 haloalkoxy, cyano or SF.sub.5 groups or halogen atoms.
- 4. A compound as claimed in claim 1 wherein R is a hydrogen, fluorine, bromine or chlorine atom or a methyl, ethyl, methoxy, methylthio, cyano or methylamino group.
- 5. A compound as claimed in claim 1 wherein n is 0 or 1.
- 6. A compound as claimed in claim 5 wherein A is 1-methyl-3-trifluoromethylpyrazol-5-yl, X.sub.1 and X.sub.2 are oxygen atoms and B is phenyl, fluorophenyl, 2-methylphenyl.
- 7. A herbicidal composition comprising as active ingredient a compound as claimed in claim 1, and a carrier.
- 8. A herbicidal composition comprising a compound as claimed in claim 6, and a carrier.
- 9. A method for combating undesired plants, which method comprises treating a locus with a herbicidally effective amount of a compound as claimed in claim 1.
- 10. A method for selectively combating undesired plants in maize or rice which comprises contacting said undesired plants with a herbicidally effective amount of a compound as claimed in claim 1.
Parent Case Info
This application claims priority from copending provisional application(s) Ser. No. 60/023,134 filed on Jul. 30, 1996.
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