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US 4,441,917 AGranted
Herbicidal urea derivatives
AssigneeImperial Chemical Industries PLC
InventorsDavid A. Griffin, David J. Collins
Life of this patent
Estimating the term…
Abstract
Sulphonyl urea derivatives of formula ArSO.sub.2 NHCONHY wherein Ar is an optionally substituted phenyl ring and Y is --CO.sub.2 R.sup.1, --CONR.sup.2 R.sup.3, ##STR1## wherein R.sup.1 to R.sup.7 are H, or optionally substituted aliphatic or phenyl radicals. These derivatives are useful as herbicides e.g. for cereals.
Claims17
Sulphonyl urea compounds of the formula (I)
- ArSO.sub.2 NHCONHY (I)
- wherein Ar is a phenyl ring optionally bearing from one to five substituents each of which may be fluoro-, bromo-, or chloro-alkyl of 1 to 4 carbon atoms other than trifluoromethyl;
- alkylsulphinyl of 1 to 4 carbon atoms;
- amino;
- mono- or di-alkylamino in which the alkyl groups each have from 1 to 4 carbon atoms;
- carbamoyl optionally substituted by one or two methyl or ethyl groups;
- carboxyl and salts thereof;
- or alkoxycarbonyl of 2 to 5 carbon atoms, and Y is a group --CO.sub.2 R.sup.1 wherein R.sup.1 is an alkyl group of 1 to 6 carbon atoms or an alkenyl or alkynyl group of 2 to 6 carbon atoms or a phenyl group;
- and salts thereof.
6 more elements
Sulphonyl urea compounds of the formula (I)
- ArSO.sub.2 NHCONHY (I)
- wherein Ar is a phenyl ring bearing a substituent in the 2-position and optionally bearing further substituents, each substituent being a halogen atom, an alkyl group of 1 to 4 carbon atoms, an alkoxy group of 1 to 4 carbon atoms, an alkylthio group of 1 to 4 carbon atoms, a fluoro-, bromo-, or chloro-alkyl group of 1 to 4 carbon atoms, cyano, nitro, or an alkylsulphonyl group of 1 to 4 carbon atoms and Y is a group --CO.sub.2 R.sup.1 wherein R.sup.1 is an alkyl group of 1 to 6 carbon atoms or an alkenyl or alkynyl group of 2 to 6 carbon atoms or a phenyl group, provided that R.sup.1 is not a methyl group when Ar is a 2-chlorophenyl, 2-methylphenyl, 2-methoxyphenyl, or 2-nitrophenyl group;
- and salts thereof.
Dependencies are inferred from the claim text.