1-(2-oxyaminosulphonylphenylsulphonyl)-3-heteroaryl-ureas

Abstract

The invention relates to new 1-(2-oxyaminosulphonylphenylsulphonyl)-3-heteroaryl-ureas of the general formula (I) ##STR1## in which R 1 represents an optionally substituted radical from the series comprising alkyl, alkenyl, alkinyl, cycloalkyl, cycloalkylalkyl, aralkyl and aryl, R 2 represents hydrogen or an optionally substituted radical from the series comprising alkyl, alkenyl, alkinyl and aralkyl and R 3 represents an optionally substituted and/or optionally fused six-membered aromatic heterocyclic radical containing at least one nitrogen atom, the following compounds being excluded: 1-(2-methoxyaminosulphonylphenylsulphonyl)-, 1-(2-ethoxyaminosulphonylphenylsulphonyl-, 1-(2-propoxyaminosulphonylphenylsulphonyl)-, 1-(2-isopropoxyaminosulphonylphenylsulphonyl)- and 1-(2-butoxyaminosulphonylphenylsulphonyl)-3-(4,6-dimethylpyrimidin-2-yl)-urea -3-(4,6-diethyl-pyrimidin-2-yl)-urea, -3-(4,6-dipropylpyrimidin-2-yl)-urea, -3-(4,6-diisopropyl-pyrimidin-2-yl)-urea and -3-(4,6-dibutyl-pyrimidin-2-yl)-urea, processes for their preparation and their use as herbicides.

We claim: 
     
       1. A 1-(2-oxyaminosulphonylphenylsulphonyl)-3-heteroaryl-urea of the formula ##STR342## in which R 1  represents C 1  -C 12  -alkyl which is optionally substituted by fluorine, chlorine, cyano, C 1  -C 4  -alkoxy, C 1  -C 4  -alkylthio, C 1  -C 4  -alkylsulphinyl, C 1  -C 4  -alkylsulphonyl, C 1  -C 4  -alkyl-carbonyl, C 1  -C 4  -alkoxy-carbonyl, C 1  -C 4  -alkylamino-carbonyl or di-.[.(C 1  -C d4  -alkyl).].(.Iadd.C 1  -C 4  -alkyl).Iaddend.-amino-carbonyl, or represents C 3  -C 6  -alkenyl which is optionally substituted by fluorine, chlorine or bromine, C 3  -C 6  -alkinyl, C 3  -C 6  -cycloalkyl, C 3  -C 6  -cycloalkyl-C 1  -C 2  -alkyl or phenyl-C 1  -C 2  -alkyl which is optionally substituted by fluorine, chlorine, nitro, cyano, C 1  -C 4  -alkyl, C 1  -C 4  -alkoxy or C 1  -C 4  -alkoxy-carbonyl, or represents benzhydryl, or represents phenyl which is optionally substituted by fluorine, chlorine, nitro, cyano, C 1  -C 4  -alkyl, trifluoromethyl, C 1  -C 4  -alkoxy, C 1  -C 2  -fluoroalkoxy, C 1  -C 4  -alkylthio, trifluoromethylthio or C 1  -C 4  -alkoxy-carbonyl, R 2  represents hydrogen or C 1  -C 4  -alkyl which is optionally substituted by fluorine, chlorine, cyano, C 1  -C 4  -alkoxy, C 1  -C 4  -alkylthio, C 1  -C 4  -alkylsulphinyl, C 1  -C 4  -alkylsulphonyl, C 1  -C 4  -alkyl-carbonyl, C 1  -C 4  -alkoxy-carbonyl, C 1  -C 4  -alkylamino-carbonyl or di-(C 1  -C 4  -alkyl)-aminocarbonyl, or represents C 3  -C 6  -alkenyl, C 3  -C 6  -alkinyl or phenyl-C 1  -C 2  -alkyl which is optionally substituted by fluorine, chlorine, nitro, cyano, C 1  -C 4  -alkyl, C 1  -C 4  -alkoxy or C 1  -C 4  -alkoxycarbonyl,   R 4  represents hydrogen, fluorine, chlorine, bromine, hydroxyl, C 1  -C 4  -alkyl which is optionally substituted by fluorine and/or chlorine, C 1  -C 4  -alkoxy .[.which is optionally substituted by fluorine and/or chlorine.]., C 1  -C 4  -alkylthio which is optionally substituted by fluorine and/or chlorine, amino, C 1  -C 4  -alkylamino or di-(C 1  -C 4  -alkyl)-amino,   X represents nitrogen,   Y represents an optionally substituted methine bridge C-R 5 ,   R 5  represents hydrogen, fluorine, chlorine, bromine, cyano, formyl, C 1  -C 4  -alkyl, C 1  -C 3  -alkoxy-carbonyl or C 1  -C 3  -alkyl-carbonyl, and   Z represents an optionally substituted methine bridge C-R 6 , and   R 6  represents hydrogen, fluorine, chlorine, bromine, hydroxyl, C 1  -C 4  -alkyl .[.which is optionally substituted by fluorine and/or chlorine.]., C 1  -C 4  -alkylthio which is optionally substituted by fluorine and/or chlorine, amino, C 1  -C 4  -alkylamino or di-(C 1  -C 4  -alkyl)-amino.   
     
     
       2. A compound according to claim 1, in which R 1  represents C 1  -C 8  -alkyl which is optionally substituted by fluorine or chlorine, C 3  -C 4  -alkenyl, C 1  -C 2  -alkoxy-carbonmethyl, phenyl, phenethyl or benzyl which is optionally substituted by fluorine, chlorine, nitro, cyano, methyl, methoxy or methoxy-carbonyl,   R 2  represents hydrogen,   R 4  represents chlorine, methyl, ethyl, methoxy.[., di-fluoromethoxy.]. or ethoxy,   X represents nitrogen,   Y represents a methine bridge (CH) and   Z represents an optionally substituted methine bridge C-R 6 , and   R 6  represents hydrogen, chlorine, methoxy, ethoxy, methylthio, ethylthio, .[.dimethlamino.]. .Iadd.dimethylamino .Iaddend.or diethylamino.   
     
     
       3. A compound according to claim 1, wherein such compound is 1-(2-methoxyaminosulphonyl-phenylsulphonyl)-3-(4-methoxy-6-methyl-pyrimidin-2-yl)-urea of the formula ##STR343## 
     
     
       4. A compound according to claim 1, wherein such compound is 1-(2-methoxyaminosulphonyl-phenylsulphonyl)-3-(4-chloro-6-methoxy-pyrimidin-2-yl)-urea of the formula ##STR344## 
     
     
       5. A compound according to claim 1, wherein such compound is 1-(2-methoxyaminosulphonyl-phenylsulphonyl)-3-(4,6-dimethoxy-pyrimidin-2-yl)-urea of the formula ##STR345## 
     
     
       6. A compound according to claim 1, wherein such compound is 1-(2-ethoxyaminosulphonyl-phenylsulphonyl)-3-(4-methoxy-6-methyl-pyrimidin-2-yl)-urea of the formula ##STR346## 
     
     
       7. A compound according to claim 1, wherein such compound is 1-(2-methoxyaminosulphonyl-phenylsulphonyl)-3-(4-ethoxy-6-methyl-pyrimidin-2-yl)-urea of the formula ##STR347## 
     
     
       8. A compound according to claim 1, wherein such compound is 1-(2-allyloxyaminosulphonyl-phenylsulphonyl)-3-(4,6-dimethoxy-pyrimidin-2-yl)-urea of the formula ##STR348## 
     
     
       9. A herbicidal composition comprising a herbicidally effective amount of a compound according to claim 1 and a diluent. 
     
     
       10. A method of combating unwanted vegetation which comprises applying to such vegetation or to a locus from which it is desired to exclude such vegetation a herbicidally effective amount of a compound according to claim 1 and a diluent. 
     
     
       11. The method according to claim 10, wherein such compound is 1-(2-methoxyaminosulphonyl-phenylsulphonyl)-3-(4-methoxy-6-methyl-pyrimidin-2-yl)-urea,   1-(2-methoxyaminosulphonyl-phenylsulphonyl)-3-(4-chloro-6-methoxy-pyrimidin-2-yl)-urea,   1-(2-methoxyaminosulphonyl-phenylsulphonyl)-3-(4,6-dimethoxy-pyrimidin-2-yl)-urea,   1-(2-ethoxyaminosulphonyl-phenylsulphonyl)-3-(4-methoxy-6-methyl-pyrimidin-2-yl)-urea,   1-(2-methoxyaminosulphonyl-phenylsulphonyl)-3-(4-ethoxy-6-methyl-pyrimidin-2-yl)-urea, or   1-(2-allyloxyaminosulphonyl-phenylsulphonyl)-3-(4,6-dimethoxy-pyrimidin-2-yl)-urea.