Patent Publication Number: US-4547215-A

Title: Herbicidal sulfonamides

Description:
RELATED APPLICATIONS 
     This application is a continuation-in-part of my copending application U.S. Ser. No. 392,364, filed Mar. 24, 1983 now abandoned. 
    
    
     BACKGROUND OF THE INVENTION 
     This invention relates to novel N-(heterocyclicaminocarbonyl)arylsulfonamides in which the aryl radical is substituted with a carboxyl radical. The compounds of this invention and their agriculturally suitable salts, are useful as agricultural chemicals, herbicides which may be selective and regulate growth. 
     In EPO Publication No. 7,687, there is disclosed herbicidal compounds of the general formula within the broad generic scope. ##STR1## wherein 
     R may be C 1  -C 12  alkyl; 
     R 2  and R 3  may be hydrogen, as may R 4  and R 5  ; 
     R 1  may be ##STR2## 
     R 2  is H, Cl, Br, F, C 1  -C 3  alkyl, --NO 2 , --SO 2  CH 3 , --OCH 3 , --SCH 3 , --CF 3 , --N(CH 3 ) 2 , --NH 2  or --CN; 
     R 3  is H, Cl, Br, F or CH 3  ; 
     R 4  is H or --CH 3  ; 
     R 5  is H, --CH 3  or --OCH 3  ; 
     Z is CH or N; 
     X is H, Cl, --CH 3 , --OCH 3 , --OCH 2  CH 3  or --OCH 2  CH 2  OCH 3  ; 
     Y is H; Cl; C 1  -C 4  alkyl; C 1  -C 4  alkyl substituted with --OCH 3 , --OC 2  H 5 , --CN, --CO 2  CH 3 , --CO 2  C 2  H 5 , or 1 to 3 atoms of F, Cl, Br; C 3  -C 4  alkenyl; --CH 2  C.tbd.CR 13  where R 13  is H, --CH 3 , --CH 2  Cl; --A--(CH 2 ) n&#39;  A 1  --(C 1  -C 3  alkyl), and n&#39;, A and A 1  are as previously defined. 
     The presence of undesired vegetation causes substantial damage to useful crops, especially agricultural products that satisfy man&#39;s basic food and fiber needs, such as rice, corn and soybeans. Compounds such as the ones indicated above, are extremely effective for killing or inhibiting the growth of undesired vegetation; such materials are commonly referred to as herbicides. The need still exists for more effective herbicides. 
     SUMMARY OF THE INVENTION 
     This invention relates to novel compounds of Formula I, agriculturally suitable compositions containing them and their method-of-use as selective preemergent or post-emergent herbicides. ##STR3## wherein R is C 2  H 5  or CH(CH 3 ) 2  ; and their agriculturally suitable salts. 
     This invention also relates to herbicidally effective combinations of compounds of Formula I with compounds of Formula II ##STR4## wherein 
     E is H, Cl, Br, F or CF 3  ; and 
     R 1  is C 1  -C 4  alkyl or CH 2  CH 2  OCH 2  CH 2  OCH 2  CH 3 . 
     This invention also relates to herbicidally effective combinations of compounds of Formula I with the compound of Formula III ##STR5## 
     Specifically preferred are: 
     2-[[(4-chloro-6-methoxypyrimidin-2-yl)aminocarbonyl]aminosulfonyl]benzoic acid ethyl ester, m.p. 198°-201°; and 
     2-[[(4-chloro-6-methoxypyrimidin-2-yl)aminocarbonyl]aminosulfonyl]benzoic acid isopropyl ester, m.p. 185°-187°. 
     DETAILED DESCRIPTION OF THE INVENTION 
     Compounds of Formula I are prepared by the procedure of Equation 1. This procedure is well known in the art. 
     EQUATION 1 ##STR6## For details, one may refer to EPO Publication No. 0007687 and U.S. Pat. No. 4,169,719 which are herein incorporated by reference. 
     Sulfonyl isocyanates of Formula a are also known in the art. For example, U.S. Pat. No. 4,305,884 teaches the preparation of these compounds. 
     Agriculturally suitable salts of compounds of Formula I are also useful herbicides and can be prepared in a number of ways known to the art. For example, metal salts can be made by contacting compounds of Formula I with a solution of an alkali or alkaline earth metal salt having a sufficiently basic anion (e.g., hydroxide, alkoxide, carbonate or hydroxide). Quaternary amine salts can be made by similar techniques. 
     Salts of compounds of Formula I can also be prepared by exchange of one cation for another. Cationic exchange can be effected by direct contact of an aqueous solution of a salt of a compound of Formula I (e.g., alkali or quaternary amine salt) with a solution containing the cation to be exchanged. This method is most effective when the desired salt containing the exchanged cation is insoluble in water and can be separated by filtration. 
     Exchange may also be effected by passing an aqueous solution of a salt of a compound of Formula I (e.g., an alkai metal or quaternary amine salt) through a column packed with a cation exchange resin containing the cation to be exchanged for that of the original salt and the desired product is eluted from the column. This method is particularly useful when the desired salt is water-soluble. 
     Acid addition salts, useful in this invention, can be obtained by reacting a compound of Formula I with a suitable acid, e.g., p-toluenesulfonic acid, trichloroacetic acid or the like. 
     The compounds of this invention and their preparation are further illustrated by the following examples wherein temperatures are given in degrees centigrade and parts are by weight unless otherwise designated. 
    
    
     EXAMPLE 1 
     2-Amino-4-chloro-6-methoxypyrimidine 
     16.4 g 2-amino-4,6-dichloropyrimidine (purchased from Aldrich Chemical Co., Milwaukee, WI 53201) was added to 200 ml of CH 3  OH. The mixture was cooled to 10° with an ice bath and 5.4 g of NaOCH 3  was added in portions while maintaining the temperature. The reaction mixture was allowed to warm to ambient temperature and then heated to reflux for two hours. The reaction mixture was then allowed to cool to ambient temperature and it was stirred overnight. A yellow solid was filtered and recrystallized from butyl chloride. The resulting solid was chromatographed on a dry column of silica, and eluted with 40% EtOAchexane. The resulting yellow solid was further purified by recrystallization from butyl chloride. 9.4 g of product with m.p. 163°-166° was obtained. 
     EXAMPLE 2 
     2-[[(4-chloro-6-methoxypyrimidin-2-yl)aminocarbonyl]aminosulfonyl]benzoic acid ethyl ester 
     To 1.0 g of 2-amino-4-chloro-6-methoxypyrimidine suspended in 25 ml of dry CH 2  Cl 2  was added 1.53 g of ethyl 2-(isocyanatosulfonyl)benzoate (prepared by procedures taught in U.S. Pat. No. 4,305,884). The reaction mixture was stirred at ambient temperature for three days. The solvent was stripped and the product was recrystallized from butyl chloride to give a white solid with m.p. 198°-201°. 
     Using procedures analogous to Example 2, 2-[[(4-chloro-6-methoxyprimidin-2-yl)aminocarbonyl]aminosulfonyl]benzoic acid isopropyl ester may be prepared. 
     The compounds of this invention may be used in combination with other commercial herbicides. They are particularly useful in combination with the following herbicides. 
     
         ______________________________________                                    
Common Name                                                               
           Chemical Name                                                  
______________________________________                                    
amitrole   3-amino-s-triazole                                             
atrazine   2-chloro-4-(ethylamino)-6-(isopropyl-                          
           amino)-s-triazine                                              
barban     4-chloro-2-butynyl m-chlorocarbanilate                         
benzoylprop                                                               
           N--benzoyl-N--(3,4-dichlorophenyl)-DL-                         
           alaine                                                         
bromacil   5-bromo-3-sec-butyl-6-methyluracil                             
bromoxynil 3,5-dibromo-4-hydroxybenzonitrile                              
butylate   S--ethyl-diisobutylthiocarbamate                               
chlortoluron                                                              
           N&#39;--(3-chloro-4-methylphenyl-N&#39;,N&#39;--                           
           dimethylurea                                                   
cyanazine  2-[[4-chloro-6-(ethylamino)-s-triazin-                         
           2-yl]amino]-2-methylpropionitrile                              
diallate   S--(2,3-dichloroallyl)diisopropylthio-                         
           carbamate                                                      
dicamba    3,6-dichloro-o-anisic acid                                     
dichloroprop                                                              
           2-(2,4-dichlorophenoxy)propionic acid                          
diclofop   2-[4-(2,4-dichlorophenoxy)phenoxy]-                            
           propanoic acid                                                 
difenzoquat                                                               
           1,2-dimethyl-3,5-diphenyl-1H--pyrazolium                       
dinoseb    2-sec-butyl-4,6-dinitrophenol                                  
diuron     3-(3,4-dichlorophenyl)-1,1-dimethylurea                        
EPTC       S--ethyl-dipropylthiocarbamate                                 
flamprop   N--benzoyl-N--(3-chloro-4-fluorophenyl)-DL-                    
           alanine                                                        
fluchloralin                                                              
           N--(2-chloroethyl)-2,6-dinitro-N--propyl-4-                    
           trifluoromethyl)aniline                                        
fluometuron                                                               
           1,1-dimethyl-3-(α,α,α-trifluoro-m-tolyl)-    
           urea                                                           
fomesafen  5-(2-chloro-4-trifluoromethylphenoxy)-                         
           N--methylsulfonyl-2-nitrobenzamide                             
fosamine   ethyl hydrogen (aminocarbonyl)phosphonate                      
glyphosate N--(phosphonomethyl)glycine                                    
hexazinone 3-cyclohexyl-6-(dimethylamino)-1-methyl-                       
           1,3,5-triazine-2,4(1H,3H)--dione                               
ioxynil    4-hydroxy-3,5-diiodobenzonitrile                               
isoproturon                                                               
           N--(4-isopropylphenyl)-N&#39;,N&#39;--dimethylurea                     
lenacil    3-cyclohexyl-6,7-dihydro-1H--cyclopenta-                       
           pyrimidine-2,4(3H,5H)--dione                                   
MCPA       [(4-chloro-o-tolyl)oxy]acetic acid                             
MCPB       4-[(4-chloro-o-tolyl)oxy]propionic acid                        
mefluidide N--[2,4-dimethyl-5-[[(trifluoromethyl)-                        
           sulfonyl]amino]phenyl]acetamide                                
methabenz- 1,3-dimethyl-3-(2-benzothiazolyl)urea                          
thiazuron                                                                 
methoxuron N&#39;--(3-chloro-4-methoxyphenyl)N,N--                            
           dimethylurea                                                   
MSMA       monosodium methanearsonate                                     
neburon    1-butyl-3-(3,4-dichlorophenyl)-1-methyl-                       
           urea                                                           
oryzalin   3,4-dinitro-N,N--dipropylsulfanilamide                         
paraquat   1,1&#39;-dimethyl-4,4&#39;-bipyridinium ion                            
profluralin                                                               
           N--(cyclopropylmethyl)-α,α,α-trifluoro-      
           2,6-dinitro-N--propyl-p-toluidine                              
propanil   3&#39;,4&#39;-dichloropropionalide                                     
siduron    1-(2-methylcyclohexyl)-3-phenylurea                            
supriox    2-[1-(2,5-dimethylphenyl)ethylsulfonyl]-                       
           pyridine-N--oxide                                              
terbacil   3-tert-butyl-5-chloro-6-methyluracil                           
triallate  S--(2,3,3-trichloroallyl)diisopropylthio-                      
           carbamate                                                      
2,4-D      (2,4-dichlorophenoxy)acetic acid                               
2,4-DB     4-(2,4-dichlorophenoxy)butyric acid                            
           3,4-diaryl-4-cyanobutyrates                                    
           4-(6-chloroquinoxalinyl-2-oxy)phenoxy-                         
           propionate C.sub.1 -C.sub.5 alkyl esters, such                 
           as methyl ester, butyl ester, ethyl                            
           ester, pentyl ester                                            
           ethoxyethoxyethyl 4-(6-chloroquinoxalin-                       
           yl-2-oxy)phenoxypropionate                                     
           propargyl 2-[4-(3,5-dichloropyridin-2-                         
           yloxy)phenoxy]propanoate                                       
           methyl 2-[4-(3-chloro-5-trifluoromethyl-                       
           pyridin-2-yloxy)phenoxy]propanoate                             
oxyfluorfen                                                               
           2-chloro-1-(3-ethoxy-4-nitrophenoxy)-4-                        
           (trifluoromethyl)benzene                                       
norflurazon                                                               
           4-chloro-5-(methylamino)-2-[(3-(tri-                           
           fluoro)phenyl]-3(2H)--pyridazinone                             
vernolate  S--propyl dipropylthiocarbamate                                
           ethyl 5-[2-chloro-4-(trifluoromethyl)-                         
           phenoxy]-2-nitrobenzoic acid                                   
______________________________________                                    
 
    
     The compounds of this invention may particularly be useful in combination with the following herbicides for use as pre- or post-emergent treatments for control of weeds in soybeans: 
     
         ______________________________________                                    
Common Name Tradename  Chemical Name                                      
______________________________________                                    
acifluorfen Blazer ®                                                  
                       5-[2-chloro-4-(trifluoro-                          
                       methyl)phenoxy]-2-ni-                              
                       trobenzoic acid                                    
alachlor    Lasso ®                                                   
                       2-chloro-2&#39;,6&#39;-diethyl-                            
                       N--(methoxymethyl)acet-                            
                       anilide                                            
bentazon    Basagran ®                                                
                       3-isopropyl-1H--2,1,3-                             
                       benzothiadiazin-4(3H)--                            
                       one 2,2-dioxide                                    
chloramben  Amiben ®                                                  
                       3-amino-2,5-dichloro-                              
                       benzoic acid                                       
fluazifop-  Fusilade ®                                                
                       butyl 2-[4-[5-(trifluoro-                          
butyl                  methyl)-2-pyridinyl-                               
                       oxy]phenoxy]propanoate                             
linuron     Lorox ®                                                   
                       3-(3,4-dichlorophenyl)-1-                          
                       methoxy-1-methylurea                               
metolachlor Dual ® 2-chloro-N--(2-ethyl-6-                            
                       methylphenyl)-N--(2-                               
                       methoxy-1-methylethyl)-                            
                       acetamide                                          
metribuzin  Lexone ®                                                  
                       4-amino-6-tert-butyl-3-                            
                       (methylthio)-as-tri-                               
                       azin-5(4H)one                                      
pendimethalin                                                             
            Prowl ®                                                   
                       N--(1-ethylpropyl)-3,4-                            
                       dimethyl-2,6-dinitro-                              
                       benzeneamine                                       
sethoxydim  Poast ®                                                   
                       2-[1-(ethoxyimino)butyl]-                          
                       5-[2-(ethylthio)-                                  
                       propyl]-3-hydroxy-2-                               
                       cyclohexene-1-one                                  
trifluralin Treflan ®                                                 
                       α,α,α-trifluoro-2,6-di-          
                       nitro-N,N--dipropyl-p-                             
                       toluidine                                          
AC 252,214  --         2-(4,5-dihydro-4-methyl-                           
                       4-(1-methylethyl)-5-                               
                       oxo-1H--imidazol-2-yl)-                            
                       3-quinolinecarboxylic                              
                       acid                                               
FMC 57020   --         2-(2&#39;-chlorophenyl)-                               
                       methyl-4,4-dimethyl-                               
                       3-isoxazolidinone                                  
fomesafen   Flex ® 5-(2-chloro-4-trifluoro-                           
                       methylphenoxy)-N--                                 
                       methylsulfonyl-2-nitro-                            
                       benzamide                                          
lactofen    --         1&#39;-(carboethoxy)ethyl-5-                           
                       (2-chloro-4-(trifluoro-                            
                       methyl)phenoxy)-2-                                 
                       nitrobenzoate                                      
DOWCO 453 ME           2-(4-(3-chloro-5-tri-                              
                       fluoromethylpyridin-2-                             
                       yloxy)phenoxy)propanoic                            
                       acid, methyl ester                                 
fenoxaprop ethyl                                                          
            Whip ® ethyl 2-(4-(6-chloro-2-                            
                       benzoxazolyloxy)phen-                              
                       oxy)propanoate                                     
CGA 82725   Topik ®                                                   
                       2-(4-(3,5-dichloropyri-                            
                       din-2-yloxy)phenoxy-                               
                       propanoic acid, propyn-                            
                       yl ester                                           
______________________________________                                    
 
    
     A particularly preferred mixture would be an effective amount of a compound of Formula I and an effective amount of a compound of Formula II below: ##STR7## Most preferred would be a mixture with a compound of Formula II wherein Z is Cl and R is CH 2  CH 3 . 
     Ratios in the mixture should be 3 to 48% by weight of a compound of Formula I and 52 to 97% by weight of a compound of Formula II. Preferably 6 to 20% of a compound of Formula I and 80 to 94% of a compound of Formula II. 
     The compounds of Formula II may be prepared by the process disclosed in EPO Application No. 81,302,801.6, published Dec. 30, 1981 and EPO Application No. 82,306,769.9, published June 29, 1983. 
     FORMULATIONS 
     Useful formulations of the compounds of Formula I can be prepared in conventional ways. They include dusts, granules, pellets, solutions, suspensions, emulsions, wettable powders, emulsifiable concentrates and the like. Many of these may be applied directly. Sprayable formulations can be extended in suitable media and used at spray volumes of from a few liters to several hundred liters per hectare. High strength compositions are primarily used as intermediates for further formulation. The formulations, broadly, contain about 0.1% to 99% by weight of active ingredient(s) and at least one of (a) about 0.1% to 20% surfactant(s) and (b) about 1% to 99.9% solid or liquid diluent(s). More specifically, they will contain these ingredients in the following approximate proportions: 
     
                       TABLE I                                                     
______________________________________                                    
            Active  Weight Percent*                                       
            Ingredient                                                    
                    Diluent(s)                                            
                              Surfactant(s)                               
______________________________________                                    
Wettable Powders                                                          
              20-90      0-74      1-10                                   
Oil Suspensions,                                                          
               3-50     40-95      0-15                                   
Emulsions, Solutions,                                                     
(including Emulsifiable                                                   
Concentrates)                                                             
Aqueous Suspension                                                        
              10-50     40-84      1-20                                   
Dusts          1-25     70-99     0-5                                     
Granules and Pellets                                                      
              0.1-95      5-99.9   0-15                                   
High Strength 90-99      0-10     0-2                                     
Compositions                                                              
______________________________________                                    
 *Active ingredient plus at least one of a Surfactant or a Diluent equals 
 100 weight percent.                                                      
 
    
     Lower or higher levels of active ingredients can, of coruse, be present depending on the intended use and the physical properties of the compound. Higher ratios of surfactant to active ingredient are sometimes desirable, and are achieved by incorporation into the formulation or by tank mixing. 
     Typical solid diluents are described in Watkins, et al., &#34;Handbook of Insecticide Dust Diluents and Carriers&#34;, 2nd Ed., Dorland Books, Caldwell, N.J., but other solids, either mined or manufactured, may be used. The more absorptive diluents are preferred for wettable powders and the denser ones for dusts. Typical liquid diluents and solvents are described in Marsden, &#34;Solvents Guide,&#34; 2nd Ed., Interscience, New York, 1950. Solubility under 0.1% is preferred for suspension concentrates; solution concentrates are preferably stable against phase separation at 0° C. &#34;McCutcheon&#39;s Detergents and Emulsifiers Annual&#34;, MC Publishing Corp., Ridgewood, N.J., as well as Sisely and Wood, &#34;Encyclopedia of Surface Active Agents&#34;, Chemical Publishing Co., Inc., New York, 1964, list surfactants and recommended uses. All formulations can contain minor amounts of additives to reduce foaming, caking, corrosion, microbiological growth, etc. 
     The methods of making such compositions are well known. Solutions are prepared by simply mixing the ingredients. Fine solid compositions are made by blending and, usually, grinding as in a hammer or fluid energy mill. Suspensions are prepared by wet milling (see, for example, Littler, U.S. Pat. No. 3,060,084). Granules and pellets may be made by spraying the active material upon preformed granular carriers or by agglomeration technique. See J. E. Browning, &#34;Agglomeration&#34;, Chemical Engineering, Dec. 4, 1967, pp. 147ff. and &#34;Perry&#39;s Chemical Engineer&#39;s Handbook&#34;, 5th Ed., McGraw-Hill, New York, 1973, pp. 8-57ff. 
     For further information regarding the art of formulation, see for example: 
     H. M. Loux, U.S. Pat. No. 3,235,361, Feb. 15, 1966, Col. 6, line 16 through Col. 7, line 19 and Examples 10 through 41; 
     R. W. Luckenbaugh, U.S. Pat. No. 3,309,192, Mar. 14, 1967, Col. 5, line 43 through Col. 7, line 62 and Examples 8, 12, 15, 39, 41, 52, 53, 58, 132, 138-140, 162-164, 166, 167 and 169-182; 
     H. Gysin and E. Knusli, U.S. Pat. No. 2,891,855, June 23, 1959, Col. 3, line 66 through Col. 5, line 17 and Examples 1-4; 
     G. C. Klingman, &#34;Weed Control as a Science&#34;, John Wiley &amp; Sons, Inc., New York, 1961, pp. 81-96; and 
     J. D. Fryer and S. A. Evans, &#34;Weed Control Handbook&#34;, 5th Ed., Blackwell Scientific Publications, Oxford, 1968, pp. 101-103. 
     In the following examples, all parts are by weight unless otherwise indicated. 
     EXAMPLE 3 
     Wettable Powder 
     
         ______________________________________                                    
2-[[(4-chloro-6-methoxypyrimidin-2-yl)amino-                              
                          80%                                             
carbonyl]aminosulfonyl]benzoic acid ethyl                                 
ester                                                                     
sodium alkylnaphthalenesulfonate                                          
                          2%                                              
sodium ligninsulfonate    2%                                              
synthetic amorphous silica                                                
                          3%                                              
kaolinite                 13%                                             
______________________________________                                    
 
    
     The ingredients are blended, hammer-milled until all the solids are essentially under 50 microns, reblended, and packaged. 
     EXAMPLE 4 
     Low Strength Granule 
     
         ______________________________________                                    
2-[[(4-chloro-6-methoxypyrimidin-2-yl)amino-                              
                          1%                                              
carbonyl]aminosulfonyl]benzoic acid ethyl                                 
ester                                                                     
N,N--dimethylformamide    9%                                              
attapulgite granules      90%                                             
(U.S.S. 20-40 sieve)                                                      
______________________________________                                    
 
    
     The active ingredient is dissolved in the solvent and the solution is sprayed upon dedusted granules in a double cone blender. After spraying of the solution has been completed, the blender is allowed to run for a short period and then the granules are packaged. 
     EXAMPLE 5 
     Aqueous Suspension 
     
         ______________________________________                                    
2-[[(4-chloro-6-methoxypyrimidin-2-yl)amino-                              
                           40%                                            
carbonyl]aminosulfonyl]benzoic acid isopropyl                             
ester                                                                     
polyacrylic acid thickener 0.3%                                           
dodecylphenol polyethylene glycol ether                                   
                           0.5%                                           
disodium phosphate         1%                                             
monosodium phosphate       0.5%                                           
polyvinyl alcohol          1.0%                                           
water                      56.7%                                          
______________________________________                                    
 
    
     The ingredients are blended and ground together in a sand mill to produce particles essentially all under 5 microns in size. 
     EXAMPLE 6 
     Granule 
     
         ______________________________________                                    
2-[[(4-chloro-6-methoxypyrimidin-2-yl)amino-                              
                          80%                                             
carbonyl]aminosulfonyl]benzoic acid isopropyl                             
ester                                                                     
wetting agent              1%                                             
crude ligninsulfonate salt (containing                                    
                          10%                                             
5-20% of the natural sugars)                                              
attapulgite clay           9%                                             
______________________________________                                    
 
    
     The ingredients are blended and milled to pass through a 100 mesh screen. This material is then added to a fluid bed granulator, the air flow is adjusted to gently fluidize the material, and a fine spray of water is sprayed onto the fluidized material. The fluidization and spraying are continued until granules of the desired size range are made. The spraying is stopped, but fluidization is continued, optionally with heat, until the water content is reduced to the desired level, generally less than 1%. The material is then discharged, screened to the desired size range, generally 14-100 mesh (1410-149 microns), and packaged for use. 
     EXAMPLE 7 
     High Strength Concentrate 
     
         ______________________________________                                    
2-[[(4-chloro-6-methoxypyrimidin-2-yl)amino-                              
                           99%                                            
carbonyl]aminosulfonyl]benzoic acid ethyl                                 
ester                                                                     
silica aerogel            0.5%                                            
synthetic amorphous silica                                                
                          0.5%                                            
______________________________________                                    
 
    
     The ingredients are blended and ground in a hammer-mill to produce a material essentially all passing a U.S.S. No. 50 screen (0.3 mm opening). The concentrate may be formulated further if necessary. 
     EXAMPLE 8 
     Wettable Powder 
     
         ______________________________________                                    
2-[[(4-chloro-6-methoxypyrimidin-2-yl)amino-                              
                           90%                                            
carbonyl]aminosulfonyl]benzoic acid isopropyl                             
ester                                                                     
dioctyl sodium sulfosuccinate                                             
                          0.1%                                            
synthetic fine silica     9.9%                                            
______________________________________                                    
 
    
     The ingredients are blended and ground in a hammer-mill to produce particles essentially all below 100 microns. The material is sifted through a U.S.S. No. 50 screen and then packaged. 
     EXAMPLE 9 
     Wettable Powder 
     
         ______________________________________                                    
2-[[(4-chloro-6-methoxypyrimidin-2-yl)amino-                              
                          40%                                             
carbonyl]aminosulfonyl]benzoic acid isopropyl                             
ester                                                                     
sodium ligninsulfonate    20%                                             
montmorillonite clay      40%                                             
______________________________________                                    
 
    
     The ingredients are thoroughly blended, coarsely hammer-milled and then air-milled to produce particles essentially all below 10 microns in size. The material is reblended and then packaged. 
     EXAMPLE 10 
     Wettable Powder 
     
         ______________________________________                                    
2-[[(4-chloro-6-methoxypyrimidin-2-yl)amino-                              
                          50%                                             
carbonyl]aminosulfonyl]benzoic acid ethyl                                 
ester                                                                     
sodium alkylnaphthalenesulfonate                                          
                           2%                                             
low viscosity methyl cellulose                                            
                           2%                                             
diatomaceous earth        46%                                             
______________________________________                                    
 
    
     The ingredients are blended, coarsely hammer-milled and then air-milled to produce particles essentially all below 10 microns in diameter. The product is reblended before packaging. 
     EXAMPLE 11 
     Granule 
     
         ______________________________________                                    
Wettable Powder of Example 10                                             
                        5%                                                
attapulgite granules   95%                                                
(U.S.S. 20-40 mesh; 0.84-0.42 mm)                                         
______________________________________                                    
 
    
     A slurry of wettable powder containing ≈25% solids is sprayed on the surface of attapulgite granules in a double-cone blender. The granules are dried and packaged. 
     EXAMPLE 12 
     Extruded Pellet 
     
         ______________________________________                                    
2-[[(4-chloro-6-methoxypyrimidin-2-yl)amino-                              
                          25%                                             
carbonyl]aminosulfonyl]benzoic acid ethyl                                 
ester                                                                     
anhydrous sodium sulfate  10%                                             
crude calcium ligninsulfonate                                             
                           5%                                             
sodium alkylnaphthalenesulfonate                                          
                           1%                                             
calcium/magnesium bentonite                                               
                          59%                                             
______________________________________                                    
 
    
     The ingredients are blended, hammer-milled and then moistened with about 12% water. The mixture is extruded as cylinders about 3 mm diameter which are cut to produce pellets about 3 mm long. These may be used directly after drying, or the dried pellets may be crushed to pass a U.S.S. No. 20 sieve (0.84 mm openings). The granules held on a U.S.S. No. 40 sieve (0.42 mm openings) may be packaged for use and the fines recycled. 
     EXAMPLE 13 
     Oil Suspension 
     
         ______________________________________                                    
2-[[(4-chloro-6-methoxypyrimidin-2-yl)amino-                              
                          25%                                             
carbonyl]aminosulfonyl]benzoic acid isopropyl                             
ester                                                                     
polyoxyethylene sorbitol hexaoleate                                       
                           5%                                             
highly aliphatic hydrocarbon oil                                          
                          70%                                             
______________________________________                                    
 
    
     The ingredients are ground together in a sand mill until the solid particles have been reduced to under about 5 microns. The resulting thick suspension may be applied directly, but preferably after being extended with oils or emulsified in water. 
     EXAMPLE 14 
     Wettable Powder 
     
         ______________________________________                                    
2-[[(4-chloro-6-methoxypyrimidin-2-yl)amino-                              
                          20%                                             
carbonyl]aminosulfonyl]benzoic acid ethyl                                 
ester                                                                     
sodium alkylnaphthalenesulfonate                                          
                          4%                                              
sodium ligninsulfonate    4%                                              
low viscosity methyl cellulose                                            
                          3%                                              
attapulgite               69%                                             
______________________________________                                    
 
    
     The ingredients are thoroughly blended. After grinding in a hammer-mill to produce particles essentially all below 100 microns, the material is reblended and sifted through a U.S.S. No. 50 sieve (0.3 mm opening) and packaged. 
     EXAMPLE 15 
     Oil Suspension 
     
         ______________________________________                                    
2-[[(4-chloro-6-methoxypyrimidin-2-yl)amino-                              
                          35%                                             
carbonyl]aminosulfonyl]benzoic acid ethyl                                 
ester                                                                     
blend of polyalcohol carboxylic                                           
                           6%                                             
esters and oil soluble petroleum                                          
sulfonates                                                                
xylene                    59%                                             
______________________________________                                    
 
    
     The ingredients are combined and ground together in a sand mill to produce particles essentially all below 5 microns. The product can be used directly, extended with oils, or emulsified in water. 
     EXAMPLE 16 
     Dust 
     
         ______________________________________                                    
2-[[(4-chloro-6-methoxypyrimidin-2-yl)amino-                              
                          10%                                             
carbonyl]aminosulfonyl]benzoic acid ethyl                                 
ester                                                                     
attapulgite               10%                                             
Pyrophyllite              80%                                             
______________________________________                                    
 
    
     The active ingredient is blended with attapulgite and then passed through a hammer-mill to produce particles substantially all below 200 microns. The ground concentrate is then blended with powdered pyrophyllite until homogeneous. 
     EXAMPLE 17 
     Emulsifiable Concentrate 
     
         ______________________________________                                    
2-[[(4-chloro-6-methoxypyrimidin-2-yl)amino-                              
                          20%                                             
carbonyl]aminosulfonyl]benzoic acid ethyl                                 
ester                                                                     
chlorobenzene             74%                                             
sorbitan monostearate and polyoxyethylene                                 
                           6%                                             
condensates thereof                                                       
______________________________________                                    
 
    
     The ingredients are combined and stirred to produce a solution which can be emulsified in water for application. 
     UTILITY 
     The compounds of the present invention have high herbicidal properties. They have utility for broadspectrum pre- and/or post-emergence weed control, in particular selective weed control in soybeans. 
     The rates of application for the compounds of the invention are determined by a number of factors, including the types of weeds to be controlled, weather and climate, formulations selected, mode of application, amount of foliage present, etc. In general terms, the subject compounds should be applied at levels of around 0.002 to 1 kg/ha, the lower rates being suggested for use on lighter soils and/or those having a low organic matter content, or for situations where only short-term persistence is required. 
     The compounds of the invention may be used in combination with any other commercial herbicide, examples of which are those of the triazine, triazole, uracil, urea, amide, diphenylether, carbamate and bipyridylium types. 
     As mentioned previously, compounds of this invention may also be used in combination with herbicides such as those of Formula II. Compound 3 is representative of this class of compounds, and may be used at rates of 0.035 to 1 kg/ha depending upon the above factors. Such combinations or split applications may be useful in obtaining both grass and broadleaf weed control in soybeans. 
     The herbicidal properties of the subject compounds were discovered in a number of greenhouse tests. The test procedures and results follow. 
     TEST A 
     Seeds of crabgrass (Digitaria sp.), barnyardgrass (Echinochloa crusgalli), wild oats (Avena fatua), sicklepod (Cassia obtusifolia), morningglory (Ipomoea sp.), cocklebur (Xanthium pensylvanicum), sorghum, corn, soybean, sugar beet, rice, wheat and purple nutsedge (Cyperus rotundus) tubers were planted and treated pre-emergence with the test chemicals dissolved in a non-phytotoxic solvent. At the same time, these crop and weed species, along with cotton and bush bean, were treated with a soil/foliage application. At the time of treatment, the plants ranged in height from 2 to 18 cm. Treated plants and controls were maintained in a greenhouse for sixteen days, after which all species were compared to controls and visually rated for response to treatment. The ratings, summarized in Table A, are based on a numerical scale extending from 0=no injury, to 10=complete kill. The accompanying descriptive symbols have the following meanings: 
     C=chlorosis/necrosis; 
     D=defoliation; 
     E=emergence inhibition; 
     G=growth retardation; 
     H=formative effects; 
     U=unusual pigmentation; and 
     6Y=abscised buds or flowers. 
     The data indicate the high herbicidal activity of the compounds of the invention and their utility for selective pre-emergence weed control in soybeans. ##STR8## 
     
                       TABLE A                                                     
______________________________________                                    
                   Cmpd. 1   Cmpd. 2                                      
Rate kg/ha         0.05      0.05                                         
______________________________________                                    
POST-EMERGENCE                                                            
Bush bean          9C        9C                                           
Cotton             2C,9G     3C,3H,9G                                     
Morningglory       10C       9C                                           
Cocklebur          10C       9C                                           
Sicklepod          9C        9C                                           
Nutsedge           9C        9G                                           
Crabgrass          2C,4G     2C,5G                                        
Barnyardgrass      5C,9H     3C,9H                                        
Wild Oats          6C,9G     8G                                           
Wheat              6C,9G     2C,9G                                        
Corn               5U,9C     2C,8H                                        
Soybean            4C,9G     2C,6G                                        
Rice               5C,9G     5C,9G                                        
Sorghum            5C,9G     3C,9G                                        
Sugar beet         5C,9G     4C,9G                                        
PRE-EMERGENCE                                                             
Morningglory       9C        9C                                           
Cocklebur          --        9H                                           
Sicklepod          9G        8G                                           
Nutsedge           10E       10E                                          
Crabgrass          0         0                                            
Barnyardgrass      2C,9H     4C,9H                                        
Wild Oats          2C,8G     2C,6G                                        
Wheat              9H        8G                                           
Corn               2C,9G     1C,9G                                        
Soybean            0         1C                                           
Rice               10E       10E                                          
Sorghum            7C,9H     2C,9H                                        
Sugar beet         10E       10E                                          
______________________________________                                    
 
    
     TEST B 
     Two plastic bulb pans were filled with fertilized and limed Woodstown sandy loam. One pan was planted with corn, sorghum, Kentucky bluegrass and several grassy weeds. The other pan was planted with cotton, soybeans, purple nutsedge (Cyperus rotundus), and several broadleaf weeds. The following grassy and broadleaf weeds were planted: crabgrass (Digitaria sanguinalis), barnyardgrass (Echinochloa crusgalli), wild oats (Avena fatua), johnsongrass (Sorghum halepense), dallisgrass (Paspalum dilatatum), giant foxtail (Setaria faberii), cheatgrass (Bromus secalinus), mustard (Brassica arvensis), cocklebur (Xanthium pensylvanicum), morningglory (Ipomoea hederacea), sicklepod (Cassia obtusifolia), teaweed (Sida spinosa), velvetleaf (Abutilon theophrasti), and jimsonweed (Datura stramonium). A 12.5 cm diameter plastic pot was also filled with prepared soil and planted with rice and wheat. Another 12.5 cm pot was planted with sugar beets. The above four containers were treated pre-emergence with the test compounds of the invention. 
     Twenty-eight days after treatment, the plants were evaluated and visually rated for response to the chemical treatments utilizing the rating system described previously for Test A. The data are summarized in Table B. Note that the compounds are useful as pre-emergence treatments for weed control in soybeans. 
     
                                           TABLE B                                 
__________________________________________________________________________
PRE-EMERGENCE ON                                                          
WOODSTOWN SANDY LOAM                                                      
        Compound 1               Compound 2                               
Rate kg/ha                                                                
        0.00175                                                           
            0.0035                                                        
                0.015                                                     
                    0.030                                                 
                         0.060                                            
                             0.500                                        
                                 0.00175                                  
                                      0.0035                              
                                          0.015                           
                                              0.030                       
                                                  0.060                   
                                                       0.120              
                                                           0.500          
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Crabgrass                                                                 
        5G  5G  3G  6G   6G  9G  2G   2G  0   2G  3G   5G  8G             
Barnyardgrass                                                             
        6G  6G  9G  9G,9C                                                 
                         9G,9C                                            
                             10C 4G   5G  6G  7G  8G   8G  9G,9C          
Sorghum 7G  9G,9C                                                         
                10C 10C  10C 10C 5G   7G  10C 10C 10C  10C 10C            
Wild Oats                                                                 
        3G  4G  8G  8G,3C                                                 
                         8G,5C                                            
                             9G,9C                                        
                                 2G   3G  4G  5G  7G   7G  9G             
Johnsongrass                                                              
        0   0   8G  8G   8G  9G,9C                                        
                                 0    0   7G  7G  8G   8G  9G,9C          
Dallisgrass                                                               
        0   2G  5G  7G   8G  9G  0    0   4G  5G  5G   6G  9G             
Giant foxtail                                                             
        0   2G  6G  7G   7G  9G  2G   2G  4G  5G  8G   9G  9G             
Ky. bluegrass                                                             
        0   2G  9G  9G   9G,9C                                            
                             10C 2G   5G  8G  9G  9G   9G  10C            
Cheatgrass                                                                
        8G  9G  9G,9C                                                     
                    10C  10C 10C 7G   8G  9G,9C                           
                                              9G,9C                       
                                                  9G,9C                   
                                                       10C 10C            
Sugar beets                                                               
        9G  9G  10C 10C  10C 10C 9G   9G  9G  9G  9G,9C                   
                                                       10C 10C            
Corn    2G  3G  6G  8G,5H                                                 
                         8G,7H                                            
                             10C 0    2G  4G  3G  6G   8G,5H              
                                                           10C            
Mustard 9G  9G  9G,9C                                                     
                    9G,9C                                                 
                         10C 10C 9G   9G  9G,9C                           
                                              9G,9C                       
                                                  10C  10C 10C            
Cocklebur                                                                 
        7G  8G  9G,3H                                                     
                    9G,5H                                                 
                         9G,7H                                            
                             9G,9C                                        
                                 7G   8G  9G,5H                           
                                              9G,5H                       
                                                  9G,7H                   
                                                       9G,7H              
                                                           9G,9C          
Pigweed --  --  --  --   --  --  --   --  --  --  --   --  --             
Nutsedge                                                                  
        10C 10C 10C 10C  10C 10C 8G   9G  10C 10C 10C  10C 10C            
Cotton  8G  8G  9G  9G   9G  10C 6G   8G  8G  8G  8G   9G  9G,9C          
Morningglory                                                              
        5G  7G  9G  9G   9G  9G,9C                                        
                                 5G   7G  9G  9G  9G   9G  9G,9C          
Sicklepod                                                                 
        4G  6G  8G  9G   9G  9G,9C                                        
                                 0    4G  2G  5G  8G   8G  9G             
Teaweed 0   4G  8G  9G   9G  9G,9C                                        
                                 0    0   8G  8G  9G   9G  9G             
Velvetleaf                                                                
        4G  7G  8G  9G   9G  9G,9C                                        
                                 0    5G  7G  8G  9G   9G  9G,9C          
Jimsonweed                                                                
        7G  9G,9C                                                         
                9G,9C                                                     
                    9G,9C                                                 
                         9G,9C                                            
                             9G,9C                                        
                                 6G   8G  9G  9G  9G,9C                   
                                                       9G,9C              
                                                           9G,9C          
Soybean 0   0   2G  2G   3G  7G  0    0   0   0   2G   2G  6G             
Rice    9G  10C 10C 10C  10C 10C 9G   9G  10C 10C 10C  10C 10C            
Wheat   4G  7G  3G  6G   8G  9G  4G   6G  5G  4G  5G   6G  8G             
__________________________________________________________________________
 
    
     TEST C 
     The test chemicals, dissolved in a non-phytotoxic solvent, were applied in an overall spray to the foliage and surrounding soil of selected plant species. One day after treatment, plants were observed for rapid burn injury. Approximately fourteen days after treatment, all species were visually compared to untreated controls and rated for response to treatment. The rating system was as described previously for Test A. The data are presented in Table C. 
     All plant species were seeded in Woodstown sandy loam soil and grown in a greenhouse. The following species were grown in soil contained in plastic pots (25 cm diameter by 13 cm deep): soybeans, cotton, alfalfa, corn, rice, wheat, sorghum, velvetleaf (Abutilon theophrasti), sesbania (Sesbania exaltata), sicklepod (Cassia obtusifolia), morningglory (Ipomoea hederacea), jimsonweed (Datura stramonium), cocklebur (Xanthium pensylvaicum), crabgrass (Digitaria sp.), nutsedge (Cyperus rotundus), barnyardgrass (Echinochloa crusgalli), giant foxtail (Setaria faberii) and wild oats (Avena fatua). The following species were grown in soil in a paper cup (12 cm diameter by 13 cm deep): sunflower, sugar beets, and mustard. All plants were sprayed approximately 14 days after planting. Additional plant species are sometimes added to this standard test in order to evaluate unusual selectivity. 
     The compounds tested by this procedure are useful for the post-emergence control of weeds in soybeans. 
     
                       TABLE C                                                     
______________________________________                                    
Over-the-Top Soil/Foliage Treatment                                       
       Compound 1    Compound 2                                           
Rate kg/ha                                                                
         .004    .016    .063  .004  .016  .063                           
______________________________________                                    
Soybeans 0       5G      9G    0     7G    8G,6C                          
Velvetleaf                                                                
         9G,4C   10C     10C   9G    10C   10C                            
Sesbania 10C     10C     10C   10C   10C   10C                            
Sicklepod                                                                 
         7G      10C     10G,  6G,4C 10C   10G,                           
                         4C                4C                             
Cotton   8G      10C     10C   10C   10C   10C                            
Morningglory                                                              
         9G,2C   10C     9G,9C 10C   9G,8C 10C                            
Alfalfa  5G      10C     9G,8C 10C   8G,2C 10C                            
Jimsonweed                                                                
         8G      9G,2C   9G    8G    10C   10C                            
Cocklebur                                                                 
         9G,1H   8G,1H   9G    --    9G    10C                            
Sunflower                                                                 
         10C     10C     10C   9G,9C 10C   10C                            
Mustard  9G,5C   10C     10C   9G,6C 9G,6C 9G,4C                          
Sugar beets                                                               
         10C     10C     10C   9G    10C   10C                            
Corn     2G,2C   5G,1U   7G    1C    2G,2C 5G,2H                          
Crabgrass                                                                 
         0       0       0     0     2G    0                              
Rice     8G,2C   9G,8C   9G,8C 6G    9G,7C 9G,4C                          
Nutsedge 9G      8G      8G,6C 7G    7G,6C 7G                             
Barnyard-                                                                 
         6G      8G,6C   9G,6C 5G    7G    8G,6C                          
grass                                                                     
Wheat    4G      8G      9G    0     6G    8G                             
Giant foxtail                                                             
         6G      7G      8G    3G    6G    9G                             
Wild Oats                                                                 
         2G      7G      8G    0     4G    7G                             
Sorghum  6G      8G,1U   9G,2U 7G    7G,2U 7G,2U                          
Johnsongrass                                                              
         5G      8G,1U   8G,1U 5G    7G    7G,4U                          
Field    0       8G      8G    6G    4G    8G                             
Bindweed                                                                  
______________________________________                                    
 
    
     TEST D 
     Four inch round pots were filled with Woodstown soil and various weed seeds were sown in separate pots. The pots containing the seeds were placed in the greenhouse and watered as needed for good plant growth. In addition, they were fertilized once with 10-10-10 Peter&#39;s solution. After about 3 weeks depending on species, when the plants were in the 4-6 true leaf stage, they were sprayed with solutions of Compound 1, Compound 3 or both using a track sprayer calibrated to deliver 60 g.p.a. of the spray solution containing 0.1% X-77 surfactant. The plants were replaced in the greenhouse and watered as needed for optimum growth for about 3 weeks. They were then evaluated for percent weed control where 0=no control and 100=complete kill. The following weeds were in the test. Barnyardgrass (Echinochloa crusgalli), giant foxtail (Setaria faberi), velvetleaf (Abutilon theophrasti), hemp sesbania (Sesbania exaltata), sicklepod (Cassia Obtusifolia), kochia (Kochia scoparia) and Russian thistle (Salsola kali ). The data are summarized in Table D. 
     
                       TABLE D                                                     
______________________________________                                    
        Rate (kg a.i./ha)                                                 
______________________________________                                    
Test 1                                                                    
Compound 3                                                                
          1/16     1/32    1/64   1/128 1/256                             
Compound 2                                                                
          1/64     1/128   1/256  1/512 1/1024                            
Barnyardgrass                                                             
          95       95      90     70    50                                
Giant Foxtail                                                             
          100      100     99     80    50                                
Velvetleaf                                                                
          100      99      90     90    90                                
Hemp sesbania                                                             
          100      100     100    100   90                                
Sicklepod 95       95      95     60    60                                
Kochia    30       30       0      0     0                                
Russian thistle                                                           
          20       20       0      0     0                                
Test 2                                                                    
Compound 3                                                                
          1/16     1/32    1/64   1/128 1/256                             
Compound 2                                                                
          1/64     1/128   1/256  1/512 1/1024                            
Barnyardgrass                                                             
          95       90      80     80    50                                
Giant Foxtail                                                             
          99       99      90     70    50                                
Velvetleaf                                                                
          100      100     100    50    50                                
Hemp sesbania                                                             
          100      100     100    90    100                               
Sicklepod 95       100     85     40    40                                
Kochia    60       50      30      0     0                                
Russian thistle                                                           
          70       50       0      0     0                                
Test 3                                                                    
Compound 3                                                                
           0        0       0      0     0                                
Compound 2                                                                
          1/64     1/128   1/256  1/512 1/1024                            
Barnyardgrass                                                             
            0       0       0      0     0                                
Giant Foxtail                                                             
           0        0       0      0     0                                
Velvetleaf                                                                
          100      99      99     80    80                                
Hemp sesbania                                                             
          100      100     100    90    85                                
Sicklepod 95       95      90     70    60                                
Kochia    50       40      20      0     0                                
Russian thistle                                                           
          90        0       0      0     0                                
Test 4                                                                    
Compound 3                                                                
          1/16     1/32    1/64   1/128 1/256                             
Compound 2                                                                
           0        0       0      0     0                                
Barnyardgrass                                                             
          98       95      90     70    50                                
Giant Foxtail                                                             
          100      100     100    80    60                                
Velvetleaf                                                                
           0        0       0      0     0                                
Hemp sesbania                                                             
           0        0       0      0     0                                
Sicklepod  0        0       0      0     0                                
Kochia     0        0       0      0     0                                
Russian thistle                                                           
           0        0       0      0     0                                
______________________________________