Back to results
US 4,405,357 AGranted
Herbicidal 3-isoxazolidinones and hydroxamic acids
AssigneeFMC Corporation
InventorJun H. Chang
Life of this patent
Estimating the term…
Abstract
Novel 3-isoxazolidinone compounds and novel hydroxamic acid intermediates from which they are prepared exhibit herbicidal activity to grassy and broad-leaf plant species while leaving legumes, especially soybeans, unaffected. The preparation and herbicidal activity of the compounds is exemplified.
Claims36
A compound of the formula ##STR6## in which R.sub.1 and R.sub.2 are independently methyl or ethyl;
- R.sub.3 is hydrogen, tetrahydropyranyl, tert-butyl-dimethylsilyl, arylsulfonyl, or ##STR7## in which R.sub.8 is C.sub.1 -C.sub.6 alkyl, haloalkyl, phenyl, methylphenyl, nitrophenyl, chlorophenyl, trifluoromethylphenyl, alkylamino, phenylamino, methylphenylamino, methoxyphenylamino, halophenylamino, trifluoromethylphenylamino, alkoxy, haloalkoxy, phenoxy, dichlorophenoxyalkyl, alkylthio, or R.sub.3 with R.sub.7 comprises a single carbon-oxygen bond, forming a ring structure;
- R.sub.4 is ##STR8## in which X is hydrogen, methyl, chlorine, bromine, fluorine, iodine, Y is chlorine, bromine, fluorine, cyano, methoxy, 4,5-methylenedioxy, and n is 0, 1, or 2;
- R.sub.5 is hydrogen, chlorine, bromine, phenylamino, or --OR.sub.9 in which R.sub.9 is hydrogen, alkyl, alkenyl, alkynyl, alkoxyalkyl up to 6 carbons, benzyl, C.sub.2 -C.sub.4 acyl, haloacyl, benzoyl, alkylcarbamoyl, phenylcarbamoyl, with the proviso that when R.sub.3 with R.sub.7 does not comprise a single carbon-oxygen bond, R.sub.5 is limited to hydrogen or chlorine.
- R.sub.6 is hydrogen;
- R.sub.7 is hydrogen, chlorine, bromine, methylthio, acetoxy, benzoyloxy, or R.sub.7 with R.sub.3 comprises a single carbon-oxygen bond, forming a ring structure.
2 more elements
A compound of the formula ##STR11## in which R.sub.1 and R.sub.2 are independently methyl or ethyl;
- R.sub.5 is hydrogen, chlorine, bromine, phenylamino, or --OR.sub.9 in which R.sub.9 is hydrogen, alkyl, alkenyl, alkynyl, alkoxyalkyl up to 6 carbons, benzyl, C.sub.2 -C.sub.4 acyl, haloacyl, benzoyl, alkylcarbamoyl, phenylcarbamoyl;
- R.sub.6 is hydrogen;
- X is hydrogen, methyl chlorine, bromine, fluorine, iodine;
- Y is chlorine, bromine, fluorine, cyano, methoxy, 4,5-methylenedioxy;
- n is 0, 1, or 2.
2 more elements
Dependencies are inferred from the claim text.