Abstract:
This invention relates to novel N-(heterocyclicaminocarbonyl)arylsulfonamides in which the aryl radical is substituted by two carboxyl radicals. The compounds have utility as herbicides.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is a continuation-in-part of my copending application U.S. Ser. No. 053,977 filed July 2, 1979, now abandoned. 
    
    
     BACKGROUND OF THE INVENTION 
     This invention relates to novel N-(heterocyclicaminocarbonyl)arylsulfonamides in which the aryl radical is substituted by two carboxyl radicals. The compounds of this invention and their agriculturally suitable salts, are useful as agricultural chemicals, e.g. plant growth regulants and herbicides. 
     Netherlands Patent No. 121,788, published Sept. 15, 1966, discloses the preparation of compounds of the following Formula and their use as general or selective herbicides: ##STR1## wherein R 1  and R 2  may independently be alkyl of 1-4 carbon atoms; and 
     R 3  and R 4  may independently be hydrogen, chlorine or alkyl or 1-4 carbon atoms. 
     U.S. Pat. No. 3,637,366 discloses compounds having the formula: ##STR2## wherein R 1  is hydrogen or lower saturated aliphatic acyl and 
     R 2  is hydrogen, 2-pyrimidinyl, pyridyl, amidino, acetyl or carbamoyl. 
     The disclosed compounds are said to provide control of crabgrass, cress, endive, clover and Poa annua. 
     French Patent. No. 1,468,747 discloses the following para-substituted phenylsulfonamides as being useful as antidiabetic agents: ##STR3## wherein R=H, halogen, CF 3  or alkyl. 
     Logemann et al. Chem. Ab., 53 18052 g (1959), disclose a number of sulfonamides, including uracil derivatives and those having the formula: ##STR4## wherein R is butyl, phenyl, or ##STR5##  and R 1  is hydrogen or methyl. 
     When tested for hydroglycemic effect in rats (oral doses of 25 mg/100 g), the compounds in which R is butyl and phenyl were most potent. The others were of low potency or inactive. 
     Wojciechowski, J. Acta. Polon. Pharm 19, p. 121-5 (1962) [Chem. Ab., 59 1633 e] describes the synthesis of N-[(2,6-dimethoxypyrimidin-4-yl)aminocarbonyl]-4-methylbenzenesulfonamide: ##STR6## Based upon similarity to a known compound, the author speculated that the foregoing compound might have a hypoglycemic activity. 
     Substituted-pyrimidinyl sulfonylureas of the following formula, which are also para-substituted on the phenyl ring, are disclosed in Farmco Ed. Sci., 12, 586 (1957) [Chem. Ab., 53, 18052 g (1959)]; ##STR7## wherein R=H or CH 3 . 
     The presence of undesired vegetation causes substantial damage to useful crops, especially agricultural products that satisfy man&#39;s basid food and fiber needs, such as cotton, rice, corn, wheat, and the like. The current population explosion and concomitant world food and fiber shortage demand improvements in the efficiency of producing these crops. Preventing or minimizing loss of a portion of such valuable crops by killing, or inhibiting the growth of undesired vegetation is one way of improving this efficiency. A wide variety of materials useful for killing or inhibiting (controlling) the growth of undesired vegetation is available; such materials are commonly referred to as herbicides. The need still exists however, for more effective herbicides. 
     SUMMARY OF THE INVENTION 
     According to this invention, there are provided novel compounds of Formula I and their agriculturally suitable salts, e.g., Na, K, alkyl ammonium, trichloroacetic acid, suitable agricultural compositions containing them and methods of using these compounds as agricultural chemicals ##STR8## wherein Q is O or ##STR9## W is O or S; when Q is O, then R is C 1  -C 4  alkyl, C 3  -C 4  alkenyl, CH 2  CH 2  Cl or CH 2  CH 2  OCH 3  ; 
     when Q is ##STR10## then R is H, C 1  -C 4  alkyl or C 3  -C 4  alkenyl; R 1  is H, C 1  -C 4  alkyl, and R and R 1  can be taken together to form --(CH 2 ) 4 , --(CH 2 ) 5  --, and --CH 2  CH 2  O--CH 2  CH 2  --; 
     X is CH 3 , CH 3  O, CH 3  CH 2  O or Cl; 
     Y is CH 3 , CH 3  O(CH 2 ) n&#39;  where n&#39; is 0, 1 or 2, CH 3  CH 2  O, or R 2  O 2  CCHR 1  O where R 1  is H or CH 3  and R 2  is H or C 1  -C 3  alkyl; 
     Z is CH, N, or C--CH 3  ; 
     with the proviso that when Q is ##STR11##  then the floating ##STR12##  must be in the 3 position. 
     Preferred compounds for their higher activity and/or ease of synthesis are: 
     (1) those compounds of the generic scope in which W is O; 
     (2) those compounds of Preferred 1 in which Q is oxygen; 
     (3) those compounds of Preferred 2 in which Y is CH 3  --, --OCH 3  or ##STR13##  and X is CH 3 , CH 3  O or CH 3  CH 2  O; (4) those compounds of Preferred 3 in which R is CH 3  or --CH 2  CH 3 . 
     Specifically preferred for their extremely high biological activity or their very highly favorable ease or synthesis, or both, are the following compounds: 
     2-{[(4,6-dimethoxypyrimidin-2-yl)aminocarbonyl]-aminosulfonyl}-1,4-benzenedicarboxylic acid, dimethyl ester; 
     2-{[(4,6-dimethoxy-1,3,5-triazin-2-yl)aminocarbonyl]aminosulfonyl}-1,4-benzenedicarboxylic acid, dimethyl ester; 
     2-{[(4-methoxy-6-methylpyrimidin-2-yl)aminocarbonyl]aminosulfonyl}-1,4-benzenedicarboxylic acid, dimethyl ester; 
     2-{[(4,6-dimethylpyrimidin-2-yl)aminocarbonyl]-aminosulfonyl}-1,4-benzenedicarboxylic acid, dimethyl ester; 
     2-{[(4,6-dimethyl-1,3,5-triazin-2-yl)aminocarbonyl]-aminosulfonyl}-1,4-benzenedicarboxylic acid, dimethyl ester; 
     2-{[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)aminocarbonyl]aminosulfonyl}-1,4-benzenedicarboxylic acid, dimethyl ester; 
     2-{([4-(2-ethoxy-1-methyl-2-oxoethoxy)-6-methyl-1,3,5-triazin-2-yl]aminocarbonyl)aminosulfonyl}-1,4-benzenedicarboxylic acid, dimethyl ester; 
     2-{[(4,6-dimethoxypyrimidin-2-yl)aminocarbonyl]-aminosulfonyl}-1,4-benzenedicarboxylic acid, dipropyl ester; 
     2-{[(4,6-dimethoxy-1,3,5-triazin-2-yl)aminocarbonyl]aminosulfonyl}-1,4-benzenedicarboxylic acid, dipropyl ester; 
     2-{[(4-methoxy-6-methyl-1,3,5-traizin-2-yl)aminocarbonyl]aminosulfonyl}-1,4-benzenedicarboxylic acid, dipropyl ester; 
     2-[[(4,6-dimethoxy-1,3,5-triazin-2-yl)aminocarbonyl]aminosulfonyl]-1,3-benzenedicarboxylate, dimethyl ester. 
     DETAILED DESCRIPTION OF THE INVENTION 
     Synthesis 
     The compounds of Formula I can be prepared as shown in Equations 1 through 4. ##STR14## (R, X, Y and Z are as defined above) 
     Thus 2-(isocyanatosulfonyl)-1,4-benzenedicarboxylates II are important intermediates in preparing the instant compounds. These intermediates are in turn prepared from the corresponding 2-(aminosulfonyl)-1,4-benzenedicarboxylates and phosgene as shown in Equation 2. Using this procedure, compounds of Formula I where the floating carboxylate is in the 4-position can be prepared. ##STR15## 
     The 2-(aminosulfonyl)-1,4-benzenedicarboxylates are converted to the corresponding isocyanate, (Eq. 2) by heating from 120° to 135° C. a mixture of the sulfonamide, an alkyl isocyanate, such as butyl isocyanate, and a catalytic amount of 1,4-diaza[2.2.2]bicyclooctane in xylene, or other inert solvent of sufficiently high boiling point (e.g. 135°), such as o-dichlorobenzene. 
     Phosgene is added until an excess is present as indicated by a drop in the boiling point. The mixture is heated to about 135° C. to drive off excess phosgene then cooled to about 25° C. and filtered to remove any insoluble by-products. The solvent and alkyl isocyanate are distilled in-vacuo giving a residue of crude sulfonyl isocyanate (II). This material can be used directly or purified by appropriate techniques. 
     As shown in Equation 1, compounds of Formula I are conveniently prepared from compounds of Formula II and the appropriately substituted aminopyrimidine or aminotriazine (III). 
     The reaction of Equation 1 is best carried out in inert aprotic solvents such as methylene chloride, tetrahydrofuran or acetonitrile, at ambient pressure and temperature. The mode of addition is not critical; however, it is often convenient to add the sulfonyl isocyanate to a stirred suspension of amine III. Since such isocyanates are liquids, low melting solids or, are readily soluble in solvents such as those listed above, their addition can be easily controlled. 
     The reaction is generally exothermic. In some cases, the desired product is soluble in the warm reaction medium and on cooling crystallizes in pure form. Other products which are soluble in the reaction medium are isolated by evaporation of the solvent, trituration of the solid residue with solvents such as 1-chlorobutane or ethyl ether, and filtration. 
     The synthesis of heterocyclic amines has been reviewed in &#34;The Chemistry of Heterocyclic Compounds&#34; a series published by Interscience Publ., New York and London. 2-Aminopyrimidines are described by D. J. Brown in &#34;The Pyrimidines&#34;, Vol. XVI of this series. The 2-amino-1,3,5-triazines are reviewed by K. R. Huffman and in &#34;The Triazines&#34; of this same series. The synthesis of triazines are also described by F. C. Schaefer, U.S. Pat. No. 3,154,547 and by K. R. Huffman and F. C. Schaefer, J. Org. Chem. 28, 1816-1821 (1963). ##STR16## 
     Compounds of Formula I in which X is OCH 3  or OCH 2  CH 3  can also be prepared as shown in Equation 3A. ##STR17## 
     The heterocyclic isocyanate VI is prepared as described in Angew, Chem. Int. Ed. Engl. 10, 402 (1971). To one equivalent of the appropriately substituted benzenesulfonamide (V) in an inert aprotic solvent such as methylene chloride, tetrahydrofuran or acetonitrile is added one or more equivalents of isocyanate VI followed by refluxing 1 to 24 hours. The product may be isolated by evaporation of the solvent, trituration of the solid residue with solvents such as 1-chlorobutane or ethyl ether, and filtration. 
     To one equivalent of compound VII in alcoholic solvent is added 3 equivalents of the corresponding sodium alkoxide. The mixture is stirred for about 0.5 hours followed by the addition of water and acidification with dilute hydrochloric acid. 
     Compounds of Formula I in which W is S are prepared as shown in Equation 4. ##STR18## 
     The heterocyclic isothiocyanate (VIII) can be prepared according to the methods of Japanese Patent: Kokai No. 51-143686, June 5, 1976, or of W. Abraham and G. Barnikow, Tetrahedron 29, 691-7 (1973). 
     The reaction of Equation 4 is best carried out by dissolving or suspending the sulfonamide and isothiocyanate in a polar solvent such as acetone, acetonitrile, ethyl acetate or methylethylketone, adding an equivalent of a base such as potassium carbonate and stirring the mixture at ambient temperature up to the reflux temperature for 1 to 24 hours. 
     Compounds of Formula IX can be isolated by evaporation of the solvent and trituration of the residue with dilute mineral acid and filtering off the insoluble product. 
     Compounds of Formula I can be prepared by the addition of one equivalent of mercuric oxide to a solution of compound IX in acetone, acetonitrile or tetrahydrofuran and stirred for 1 to 24 hours followed by filtration of mercuric sulfide and evaporation of the solvent. 
     The 2-(aminosulfonyl)-1,4-benzenedicarboxylates above can be prepared according to Scheme 1. This route was described in J. of Pharm. and Pharmacology 14, 679 (1962), the disclosure of which is herein incorporated by reference. ##STR19## 
     Compounds of Formula IV where R is other than CH 2  CH═CH 2  can be prepared according to Scheme 2. ##STR20## 
     Compounds of Formula IV where Q is oxygen and R is CH 2  CH═CH 2  and other alkyls can also be prepared according to Scheme 3. ##STR21## 
     The preparation of agriculturally suitable salts of the compounds of Formula I, as well as starting materials and intermediates for said compounds, not otherwise described herein, is disclosed in U.S. Pat. No. 4,217,405, the contents of which are incorporated herein by reference. 
    
    
     The compounds of this invention and their preparation are further illustrated by the following examples wherein temperatures are given in degrees centigrade and parts by weight unless otherwise indicated. 
     EXAMPLE 1 
     3-(Aminosulfonyl)-4-methylbenzoic Acid 
     To a stirred solution of 200 ml of chlorosulfonic acid cooled to 5°-15° was added 68 g of p-toluic acid. The mixture was heated for 6 hours at 120°-130° and then poured onto ice. The mixture was then extracted with chloroform. The extract was washed with ice water, dried over magnesium sulfate, filtered and stripped to yield 43 g of sulfonyl chloride (m.p. 168°-170°) product. The product was then added, in portions, to 400 ml of liquid ammonia with rapid stirring and then allowed to evaporate at room temperature to dryness, overnight. The resulting residue was dissolved in H 2  O acidified, filtered, washed with H 2  O and dried to give 36.9 g of solid; m.p. 275°-277°, 3-(aminosulfonyl)-4-methyl benzoic acid. 
     EXAMPLE 2 
     2-(Aminosulfonyl)-1,4-benzenedicarboxylic Acid 
     To a solution of 44 g of 3-(aminosulfonyl)-4-methyl benzoic acid (Example 1) in 500 ml H 2  O was added 11.0 g of sodium carbonate and 72 g of potassium permanganate in 8 g portions at 50°-60° over 5.5 hours. Then, 1 ml formic acid was added to decompose excess oxidant and the solution was filtered hot (60°) through Celite. The filter pad was washed with hot water. The combined filtrate was concentrated, in vacuo to approximately 300 ml and brought to pH 6 with concentrated HCl. A small amount of solid was filtered off. The filtrate was brought to pH 3.5 with concentrated HCl. The resulting solid was collected, washed with water and dried to give 33 g of solid; m.p. 259-290 (known m.p. 312-314). This material was used, without further purification, in Example 3. 
     EXAMPLE 3 
     Dimethyl 2-(Aminosulfonyl)-1,4-benzenedicarboxylate 
     To the product isolated in Example 2 was added 300 ml methanol. The mixture was refluxed for 4 hours while HCl was bubbled in, then refluxed, overnight. The solution was filtered (hot), and the filtrate stripped. The residue was recrystallized from isopropanol to give 14 g of product; m.p. 120°-130°. This product was recrystallized three times from 1-chlorobutane and a small amount of acetonitrile to give 2.9 g of dimethyl 2-(aminosulfonyl)-1,4-benzenedicarboxylate; m.p. 165°-170°. A melting point for the same product was found to be 171°-173° in the J. of Pharm. and Pharmacology 14, 679 (1962). 
     EXAMPLE 4 
     Dimethyl 2-Nitro-1,4-benzenedicarboxylate 
     To 150 ml of phosphorous oxychloride was added, with stirring, 211 g of 2-nitro-1,4-benzenedicarboxylic acid. To this mixture was added 425 g of phosphorous pentachloride in portions so that foaming was controlled. The mixture was heated to reflux (108°) until gas evolution ceased, then the phosphorous oxychloride was removed in-vacuo to give 268 g of residue. The residue was added over 0.75 hours to 200 ml of methanol. The solution temperature was allowed to rise to reflux during the addition and refluxing was continued for 1.75 hours longer. The mixture was then stripped and the residue recrystallized from acetonitrile and 1-chlorobutane (1:6) to give 137 g off white solid; m.p. 72.5°-74°, dimethyl 2-nitro-1,4-benzenedicarboxylate. 
     EXAMPLE 5 
     Dimethyl 2-Amino-1,4-benzenedicarboxylate 
     A Parr Shaker was charged with 50 g of dimethyl 2-amino-1,4-benzenedicarboxylate, 250 ml methanol, and 2.0 g of 5% palladium on charcoal. The Shaker bottle was then charged with hydrogen at 50 p.s.i. and shaken until hydrogen uptake had ceased (approximately 1 hour). The reaction mixture was filtered and the filter cake washed with DMF. The combined filtrates were stripped to dryness and the residue washed with methanol, filtered and dried to give 35.3 g solid; m.p. 132°-134°, dimethyl 2-amino-1,4-benzenedicarboxylate. 
     EXAMPLE 6 
     Dimethyl 2-(Aminosulfonyl)-1,4-benzedicarboxylic Acid from Dimethyl 2-Amino-1,4-benzenedicarboxylate 
     To a mixture of 112.8 g of dimethyl 2-amino-1,4-benzenedicarboxylate, in 400 ml concentrated HCl and 120 ml acetic acid, at 0°-3° was added, dropwise, a solution of 51.8 g sodium nitrite in 140 ml water over 0.75 hours. The mixture was then stirred at 0° for 10 minutes and poured into a mixture of 575 ml acetic acid, 14 g cuprous chloride and 100 ml sulfur dioxide at 0°-5° over 10 minutes. The mixture was stirred at 0°-5° for 0.25 hours then warmed to room temperature and stirred for 3 hours. It was poured into 3 liters of ice water and extracted with diethyl ether. The ether was washed three times with water, then with saturated sodium bicarbonate until basic and then washed with water once again. The solution was dried over magnesium sulfate and filtered to give ˜800 ml of solution. The solution was cooled to 10°-20°  and 20 ml of liquid ammonia added dropwise. It was stirred for 0.5 hours at 25°. The solid that formed was collected, washed with diethyl ether, then washed four times with water and finally washed with methanol (50 ml). The product was dried to give 98.5 g; m.p. 167°-170° of dimethyl 2-(aminosulfonyl)-1,4-benzenedicarboxylic acid. 
     EXAMPLE 7 
     Dimethyl 2-(Isocyanatosulfonyl)-1,4-benzenedicarboxylate 
     A stirred mixture of 95.6 g of dimethyl 2-(aminosulfonyl)-1,4-benzenedicarboxylic acid, 35.5 g of n-butylisocyanate, 0.5 g of 1,4-diazabicyclo[2.2.2]octane and 400 ml of xylene was heated to reflux for one half hour. Phosgene gas was then passed into the system under a dry ice reflux condenser allowing the reaction temperature to drop to 120°. This addition was continued until the reflux temperature remained at 120° without further phosgene addition (2.75 hours). The temperature of the reaction mixture was then raised to 136° (by removal of the dry ice reflux condenser) after which it was cooled to room temperature and filtered. Evaporation of the filtrate yielded the desired crude sulfonyl isocyanate, which was used for subsequent reactions without purification. The product is extremely reactive with water so contact with moisture should be avoided. 
     The compound was identified by conversion to the next product. 
     Using the procedure exemplified above, the compounds of Table III can be prepared. 
     EXAMPLE 8 
     Dimethyl 2-[[(4,6-Dimethylpyrimidin-2-yl)aminocarbonyl]-aminosulfonyl]-1,4-benzenedicarboxylate 
     To 32 g of 2-amino-4,6-dimethylpyrimidine in 300 ml of acetonitrile was added a trace of 1,4-diazabicyclo[2.2.2]octane followed by slow addition over 15-20 minutes of 97 g of dimethyl 2-(isocyanatosulfonyl)-1,4o-benzenedicarboxylate in 90 ml of acetonitrile. The temperature rose to 36° and the reaction was stirred at room temperature overnight. The mixture was filtered and the solid washed twice with acetonitrile, once with 1-chlorobutane and dried to give 81.8 g of solid; m.p. 177°-180°, dimethyl 2-[[(4,6-dimethylpyrimidin-2-yl)aminocarbonyl]aminosulfonyl]-1,4-benzenedicarboxylate. 
     EXAMPLE 9 
     Dimethyl 2-[[4-Methoxy-6-methyl-1,3,5-triazin-2-yl)aminocarbonyl]aminosulfonyl]-1,4-benzenedicarboxylate 
     To 1.3 g of 2-amino-4-methoxy-6-methyltriazine in 20 ml acetonitrile containing a trace of 1,4-diazabicyclo[2.2.2.]octane was added by slow addition, 3.75 g of dimethyl-2-(isocyanatosulfonyl)-1,4-benzenedicarboxylate in 3.4 ml acetonitrile. The mixture was stirred overnight at room temperature, filtered and the resulting solid washed with acetonitrile and dried to give 3.1 g white solid; m.p. 173°-175°, dimethyl 2-[[4-methoxy-6-methyl-1,3,5-triazin-2-yl)aminocarbonyl]-aminosulfonyl]-1,4-benzenedicarboxylate. 
     Using the procedures exemplified, the compounds of Tables I and II can be prepared. These tables are not all inclusive but only illustrative of the scope of this application. 
     EXAMPLE 10 
     Dimethyl 2-(chlorosulfonyl)-1,3-benzenedicarboxy] and from 2-amino-1,3-benzenedicarboxylate 
     To a mixture of 20 g dimethyl 2-amino-1,3-benzenedicarboxylate prepared by the procedures of Scheme 3 (Hirsch et al., J. Org. Chem. 39, p. 2044-8 (1974) in 150 ml concentrated HCl at 0°-5° was added, dropwise, a solution of 7.2 g sodium nitrite in 10 ml water over 10 minutes. 
     The mixture was stirred at 0° for 0.5 hours and poured into a mixture of 150 ml acetic acid, 6 g cupric chloride in 6 ml water, and 40 ml sulfur dioxide over 10 minutes and stirred for 2 hours. 
     After adding 100 ml diethyl ether, the solution was stirred 17 hours at room temperature. About 600 ml water was added to this solution and the solid which formed was collected, dissolve in methylene chloride, and dried with magnesium sulfate. Evaporation of the methylene chloride yielded 18.8 g, m.p. 110°-112°, of dimethyl 2-(chlorosulfonyl)-1,3-benzenedicarboxylic acid. 
     EXAMPLE 11 
     Dimethyl 2-(aminosulfonyl)-1,3-benzenedicarboxylic acid from dimethyl 2-(chlorosulfonyl)-1,3-benzenedicarboxylic acid 
     To a mixture of 5 g dimethyl 2-(chlorosulfonyl)-1,3-benzenedicarboxylic acid and 1.4 g sodium bicarbonate in 25 ml tetrahydrofuran (dried over alumina) at 0°-5° was added, dropwise, a solution of 0.4 ml ammonia in 5 ml dry tetrahydrofuran. After stirring for 2 hours, the solution was evaporated, the resulting solid was washed with methylene chloride, then with water to give 2.4 g, m.p. 169° of dimethyl 2-(aminosulfonyl)-1,3-benzenedicarboxylic acid. 
     Using the methods described herein, the compounds of Tables I through VII can be prepared. These tables are not all inclusive but only illustrative of the scope of this application. 
     
                                           TABLE I__________________________________________________________________________ ##STR22##R         X    Y              W m.p.__________________________________________________________________________CH.sub.3  CH.sub.3          OCH.sub.3      O 167-169°CH.sub.2 CH.sub.3     CH.sub.3          OCH.sub.3      OCH.sub.2 CH.sub.2 CH.sub.3     CH.sub.3          OCH.sub.3      O glassCH(CH.sub.3).sub.2     CH.sub.3          OCH.sub.3      OCH.sub.2 CHCH.sub.2     CH.sub.3          OCH.sub.3      OCH.sub.2 CH.sub.2 Cl     CH.sub.3          OCH.sub.3      OCH.sub.3  CH.sub.3           ##STR23##     OCH.sub.2 CH.sub.3     CH.sub.3          CH.sub.3       SCH.sub.2 CH.sub.2 CH.sub.3     CH.sub.3          CH.sub. 3      SCH(CH.sub.3).sub.2     CH.sub.3          CH.sub.2 OCH.sub.3                         OCH.sub.2 CHCH.sub.2     CH.sub.3          CH.sub.2 CH.sub.2 OCH.sub.3                         OCH.sub.2 CH.sub.2 Cl     CH.sub.3          OCH.sub.2 CH.sub.3                         OCH.sub.3  OCH.sub.3          OCH.sub.3      O  99-105°CH.sub.2 CH.sub.3     OCH.sub.3          CH.sub.2 OCH.sub.3                         OCH.sub.2 CH.sub.2 CH.sub.3     OCH.sub.3           ##STR24##     OCH(CH.sub.3).sub.2     OCH.sub.3           ##STR25##     OCH.sub.2 CHCH.sub.2     OCH.sub.3           ##STR26##     OCH.sub.2 CH.sub.2 Cl     OCH.sub.3           ##STR27##     OCH.sub.3  OCH.sub.3          OCH.sub.2 CH.sub.3                         OCH.sub.3  OCH.sub.3           ##STR28##     OCH.sub.3  OCH.sub.3          CH.sub.2 OCH.sub.3                         O__________________________________________________________________________ 
    
     
                       TABLE II______________________________________ ##STR29##R          X        Y               W   m.p.______________________________________CH.sub.3   OCH.sub.3               OCH.sub.2 CH.sub.3                               OCH.sub.2 CH.sub.3      OCH.sub.3               OCH.sub.3       OCH.sub.2 CH.sub.2 CH.sub.3      OCH.sub.3               OCH.sub.3       O   glassCH(CH.sub.3).sub.2      OCH.sub.3               OCH.sub.3       OCH.sub.2 CHCH.sub.2      OCH.sub.3               OCH.sub.2 CH.sub.3                               OCH.sub.2 CH.sub.2 Cl      OCH.sub.3               OCH.sub.3       OCH.sub.3   OCH.sub.3               CH.sub.3        O   173-                                   175°CH.sub.2 CH.sub.3      OCH.sub.3                ##STR30##      OCH.sub.2 CH.sub.2 CH.sub.3      OCH.sub.3               CH.sub.2 OCH.sub.3                               SCH(CH.sub.3).sub.2      OCH.sub.3               CH.sub.2 CH.sub.2 OCH.sub.3                               OCH.sub.2 CHCH.sub.2      Cl       CH.sub.3        OCH.sub.2 CH.sub.2 Cl      OCH.sub.3                ##STR31##      OCH.sub.3    OCH.sub.3               CH.sub.2 CH.sub.2 OCH.sub.3                               OCH.sub.2 CH.sub.3      CH.sub.3 OCH.sub.2 CH.sub.3                               SCH.sub.2 CH.sub.2 CH.sub.3      CH.sub.3                ##STR32##      OCH(CH.sub.3).sub.2      CH.sub.3 CH.sub.2 OCH.sub.3                               OCH.sub.2 CHCH.sub.2      CH.sub.3                ##STR33##      OCH.sub.2 CH.sub.2 Cl      CH.sub.3 OCH.sub.2 CH.sub.3                               OCH.sub.3   CH.sub.3 CH.sub.2 CH.sub.2 OCH.sub.3                               OCH.sub.3   CH.sub.3                ##STR34##      O   70-  80°CH.sub.3   OCH.sub.3                ##STR35##      OCH.sub.3   OCH.sub.3               OCH.sub.3       O   185-                                   186°CH.sub.2 CH.sub.2 CH.sub.3      CH.sub.3 OCH.sub.3       O   glass______________________________________ 
    
     
                       TABLE III______________________________________ ##STR36##R                     IR______________________________________CH.sub.3CH.sub.2 CH.sub.3CH.sub.2 CH.sub.2 CH.sub.3CH.sub.2 CHCH.sub.2CH.sub.2 CH.sub.2 ClCH(CH.sub.3).sub.2______________________________________ 
    
     Using the procedures described in Equations 3 and 4, the followig compounds may be prepared. 
     
                       TABLE IV______________________________________ ##STR37##R          X        Y                W m.p.______________________________________CH.sub.3   CH.sub.3 OCH.sub.3        OCH.sub.2 CH.sub.3      CH.sub.3 OCH.sub.3        OCH.sub.2 CH.sub.2 CH.sub.3      CH.sub.3 OCH.sub.3        OCH(CH.sub.3).sub.2      CH.sub.3 OCH.sub.3        OCH.sub.2 CHCH.sub.2      CH.sub.3 OCH.sub.3        OCH.sub.2 CH.sub.2 Cl      CH.sub.3 OCH.sub.3        OCH.sub.3   CH.sub.3                ##STR38##       OCH.sub.2 CH.sub.3      CH.sub.3 CH.sub.3         SCH.sub.2 CH.sub.2 CH.sub.3      CH.sub.3 CH.sub.3         SCH(CH.sub.3).sub.2       CH.sub.3               CH.sub.2 OCH.sub.3                                OCH.sub.2 CHCH.sub.2      CH.sub.3 CH.sub.2 CH.sub.2 OCH.sub.3                                OCH.sub.2 CH.sub.2 Cl      CH.sub.3 OCH.sub.2 CH.sub.3                                OCH.sub.3   OCH.sub.3               OCH.sub.3        OCH.sub.2 CH.sub.3      OCH.sub.3               CH.sub.2 OCH.sub.3                                OCH.sub.2 CH.sub.2 CH.sub.3      OCH.sub.3                ##STR39##       OCH(CH.sub.3).sub.2      OCH.sub.3                ##STR40##       OCH.sub.2 CHCH.sub.2      OCH.sub.3                ##STR41##       OCH.sub.2 CH.sub.2 Cl      OCH.sub.3                ##STR42##       OCH.sub.3   OCH.sub.3               OCH.sub.2 CH.sub.3                                OCH.sub.3   OCH.sub.3                ##STR43##       OCH.sub.3   OCH.sub.3               CH.sub.2 OCH.sub.3                                S______________________________________ 
    
     
                       TABLE V______________________________________ ##STR44##R          X        Y               W   m.p.______________________________________CH.sub.3   OCH.sub.3               OCH.sub.2 CH.sub.3                               OCH.sub.2 CH.sub.3      OCH.sub.3               OCH.sub.3       OCH.sub.2 CH.sub.2 CH.sub.3      OCH.sub.3               OCH.sub.3       OCH(CH.sub.3).sub.2      OCH.sub.3               OCH.sub.3       OCH.sub.2 CHCH.sub.2      OCH.sub.3               OCH.sub.2 CH.sub.3                               OCH.sub.2 CH.sub.2 Cl      OCH.sub.3               OCH.sub.3       OCH.sub.3   OCH.sub.3               CH.sub.3        OCH.sub.2 CH.sub.3      OCH.sub.3                ##STR45##      OCH.sub.2 CH.sub.2 CH.sub.3      OCH.sub. 3               CH.sub.2 OCH.sub.3                               SCH(CH.sub.3).sub.2      OCH.sub.3               CH.sub.2 CH.sub.2 OCH.sub.3                               SCH.sub.2 CHCH.sub.2      OCH.sub.3               CH.sub.3        OCH.sub.2 CH.sub.2 Cl      OCH.sub.3                ##STR46##      OCH.sub.3   OCH.sub.3               CH.sub.2 CH.sub.2 OCH.sub.3                               OCH.sub.2 CH.sub.3      CH.sub.3 OCH.sub.2 CH.sub.3                               SCH.sub.2 CH.sub.2 CH.sub.3      CH.sub.3                ##STR47##      OCH(CH.sub.3).sub.2      CH.sub.3 CH.sub.2 OCH.sub.3                               OCH.sub.2 CHCH.sub.2      CH.sub.3                ##STR48##      OCH.sub.2 CH.sub.2 Cl      CH.sub.3 OCH.sub.2 CH.sub.3                               OCH.sub.3   CH.sub.3 CH.sub.2 CH.sub.2 OCH.sub.3                               OCH.sub.3   CH.sub.3                ##STR49##      OCH.sub.3   OCH.sub.3                ##STR50##      OCH.sub.3   OCH.sub.3               OCH.sub.3       OCH.sub.2 CH.sub.2 CH.sub.3      CH.sub.3 OCH.sub.3       O______________________________________ 
    
     
                                           TABLE VI__________________________________________________________________________ ##STR51##R        R.sub.1 X    Y               W m.p.__________________________________________________________________________CH.sub.3 CH.sub.3            CH.sub.3                 OCH.sub.3       OCH.sub.2 CH.sub.3    CH.sub.2 CH.sub.3            CH.sub.3                 OCH.sub.3       OCH.sub.2 CH.sub.2 CH.sub.3    CH.sub.2 CH.sub.2 CH.sub.3            CH.sub.3                 OCH.sub.3       OCH(CH.sub.3).sub.2    CH(CH.sub.3).sub.2            CH.sub.3                 OCH.sub.3       OCH.sub.2 CHCH.sub.2    CH.sub.2 CH.sub.3            CH.sub.3                 OCH.sub.3       OCH.sub.3 CH.sub.3            CH.sub.3                  ##STR52##      OCH.sub.2 CH.sub.3     CH.sub.3            CH.sub.3                 CH.sub.3        SCH.sub.2 CH.sub.2 CH.sub.3    CH.sub.2 CH.sub.3            CH.sub.3                 CH.sub.3        SCH(CH.sub.3).sub.2    CH.sub.2 CH.sub.3            CH.sub.3                 CH.sub.2 OCH.sub.3                                 OCH.sub.2 CHCH.sub.2    CH.sub.3            CH.sub.3                 CH.sub.2 CH.sub.2 OCH.sub.3                                 OCH.sub.3 CH.sub.3            OCH.sub.3                 OCH.sub.3       SCH.sub.2 CH.sub.3    H       OCH.sub.3                 CH.sub.2 OCH.sub.3                                 OCH.sub.2 CH.sub.2 CH.sub.3    CH.sub.2 CH.sub.3            OCH.sub.3                  ##STR53##      OCH(CH.sub.3).sub.2    CH.sub.3            OCH.sub.3                  ##STR54##      OCH.sub.2 CHCH.sub.2    CH.sub.3            OCH.sub.3                  ##STR55##      OCH.sub.3 H       CH.sub.3                 OCH.sub.3       OCH.sub.3 H       OCH.sub.3                 OCH.sub.2 CH.sub.3                                 OCH.sub.3 CH.sub.3            OCH.sub.3                  ##STR56##      OCH.sub.3 CH.sub.2 CH.sub.3            OCH.sub.3                 CH.sub.2 OCH.sub.3                                 O ##STR57##    CH.sub.3            OCH.sub.3            O ##STR58##    CH.sub.3            OCH.sub.3            O ##STR59##    CH.sub.3            OCH.sub.3            O ##STR60##    CH.sub.3             ##STR61##           O ##STR62##    CH.sub.3            CH.sub.3             S ##STR63##    CH.sub.3            CH.sub.3             O ##STR64##    OCH.sub.3            OCH.sub.3            O ##STR65##    OCH.sub.3            CH.sub.2 OCH.sub.3   O ##STR66##    OCH.sub.3             ##STR67##           O ##STR68##    OCH.sub.3             ##STR69##           O ##STR70##    OCH.sub.3             ##STR71##           O__________________________________________________________________________ 
    
     Also included in Tables I, IV and VI are compounds in which Z=C--CH 3  such as: ##STR72## 
     These compounds may also be prepared by procedures taught herein. 
     
                                           TABLE VII__________________________________________________________________________ ##STR73##R        R.sub.1   X    Y              W m.p.__________________________________________________________________________CH.sub.3 CH.sub.3  OCH.sub.3                   OCH.sub.2 CH.sub.3                                  OCH.sub.2 CH.sub.3    CH.sub.2 CH.sub.3              OCH.sub.3                   OCH.sub.3      OCH.sub.2 CH.sub.2 CH.sub.3    CH.sub.2 CH.sub.2 CH.sub.3              OCH.sub.3                   OCH.sub.3      OCH(CH.sub.3).sub.2    CH(CH.sub.3).sub.2              OCH.sub.3                   OCH.sub.3      OCH.sub.2 CHCH.sub.2    CH.sub.2 CH.sub.3              OCH.sub.3                   OCH.sub.2 CH.sub.3                                  OCH.sub.3 CH.sub.3  OCH.sub.3                   CH.sub.3       SCH.sub.2 CH.sub.3    CH.sub.3  OCH.sub.3                    ##STR74##     OCH.sub.2 CH.sub.2 CH.sub.3    CH.sub.2 CH.sub.3              OCH.sub.3                   CH.sub.2 OCH.sub.3                                  OCH(CH.sub.3).sub.2    CH.sub.2 CH.sub.3              OCH.sub.3                   CH.sub.2 CH.sub.2 OCH.sub.3                                  OCH.sub.2 CHCH.sub.2    CH.sub.3  OCH.sub.3                   CH.sub.3       OCH.sub.3 CH.sub.3  OCH.sub.3                   CH.sub.2 CH.sub.2 OCH.sub.3                                  OCH.sub.2 CH.sub.3    H         CH.sub.3                   OCH.sub.2 CH.sub.3                                  OCH.sub.2 CH.sub.2 CH.sub.3    CH.sub.2 CH.sub.3              CH.sub.3                    ##STR75##     OCH(CH.sub.3).sub.2    CH.sub.3  CH.sub.3                   CH.sub.2 OCH.sub.3                                  OCH.sub.2 CHCH.sub.2    CH.sub.3  CH.sub.3                    ##STR76##     OCH.sub.3 H         CH.sub.3                   CH.sub.2 CH.sub.2 OCH.sub.3                                  OCH.sub.3 CH.sub.3  CH.sub.3                    ##STR77##     OCH.sub.3 CH.sub.2 CH.sub.3              OCH.sub.3                    ##STR78##     OCH.sub.3 CH.sub.3  OCH.sub.3                   OCH.sub.3      OCH.sub.2 CH.sub.2 CH.sub.3    CH.sub.3  CH.sub.3                   OCH.sub.3      O ##STR79##         CH.sub.3                   OCH.sub.3      O ##STR80##         CH.sub.3                   OCH.sub.3      O ##STR81##         CH.sub.3                   OCH.sub.3      O ##STR82##         CH.sub.3                    ##STR83##     O ##STR84##         CH.sub.3                   CH.sub.3       S ##STR85##         CH.sub.3                   CH.sub.3       O ##STR86##         OCH.sub.3                   OCH.sub.3      O ##STR87##         OCH.sub.3                   CH.sub.2 OCH.sub.3                                  O ##STR88##         OCH.sub.3                    ##STR89##     O ##STR90##         OCH.sub.3                    ##STR91##     O ##STR92##         OCH.sub.3                    ##STR93##     O__________________________________________________________________________ 
    
     FORMULATIONS 
     Useful formulations of the compounds of Formula I can be prepared in conventional ways. They include dusts, granules, pellets, suspensions, emulsions, wettable powders, emulsifiable concentrates and the like. Many of them can 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 used primarily as concentrates which are to be diluted prior to ultimate use. 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 approximate proportions set forth in Table 3. 
     
                       TABLE VIII______________________________________       Weight Percent*       Active       Ingredient               Diluent(s)                         Surfactant(s)______________________________________Wettable Powders         20-90      0-74     1-10Oil Suspensions,Emulsions(includingEmulsifiableConcentrates)  5-50     40-95     0-15Aqueous Suspensions         10-50     40-84     1-20Dusts          1-25     70-99     0-5Granules and Pellets         0.1-95      5-99.9  0-15High Strength 90-99      0-10     0-2Compositions______________________________________ *Active ingredient plus at least one of a Surfactant or a Diluent equals 100 weight percent. 
    
     Lower or higher levels of active ingredient can 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. 
     Some 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, N.Y., 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., N.Y., 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 can be made by spraying the active material on preformed granular carriers or by agglomeration techniques. 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, N.Y., 1973, pp. 8-57 ff. 
     For further information regarding the art of formulation, see for example: 
     H. M. Loux, U.S. Pat. No. 3,235,361, Col. 6, line 16 through Col. 7, line 19 and Examples 10 through 41. 
     R. W. Luckenbaugh, U.S. Pat. No. 3,309,192, 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, 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. 
     J. D. Fryer and S. A. Evans, &#34;Weed Control Handbook&#34;, 5th Ed., Blackwell Scientific Publications, Oxford, 1968, pp. 101-103. 
     Unless indicated otherwise, all parts are by weight in the following examples. 
     EXAMPLE 12 
     Wettable Powder 
     
         ______________________________________2-{[(4,6-Dimethyl-1,3,5-triazin-2-yl)aminocarbonyl]-aminosulfonyl}-1,4-benzenedicarboxylic acid,dimethyl ester                90%dioctyl sodium sulfosuccinate 0.1%sodium ligninsulfonate        1%synthetic fine silica         8.9%______________________________________ 
    
     The ingredients are blended and ground in a hammer-mill to produce particles almost all of which are below 100 microns in size. The product is sifted through a U.S.S. No. 50 screen and packaged. 
     EXAMPLE 13 
     Granule 
     
         ______________________________________wettable powder of Example 12                 10%attapulgite granules  90%(U.S.S. #20-40; 0.84-0.42 mm)______________________________________ 
    
     A slurry of wettable powder containing 50% solids is sprayed on the surface of attapulgite granules in a double-cone blender. The granules are dried and packaged. 
     EXAMPLE 14 
     Wettable Powder 
     
         ______________________________________2-{[(4,6-Dimethylpyrimidin-2-yl)aminocarbonyl]amino-sulfonyl}-1,4-benzenedicarboxylic acid,dimethyl ester               80%sodium alkylnaphthalenesulfonate                        2%sodium ligninsulfonate       2%synthetic amorphous silica   3%kaolinite                    13%______________________________________ 
    
     The ingredients are thoroughly blended and ground in a hammer mill to produce particles essentially all of which are under 100 microns in size; the material is reblended, sifted through a U.S.S. No. 50 sieve and packaged. 
     EXAMPLE 15 
     Granule 
     
         ______________________________________wettable powder of Example 14                 25%gypsum                64%potassium sulfate     11%______________________________________ 
    
     The ingredients are blended in a rotating mixer and water is sprayed onto the powder to accomplish granulation. When most of the material has reached the desired range of 1.0 to 0.42 mm. (U.S.S. #18 to 40 mesh), the granules are removed, dried, and screened. Oversize material is crushed to produce additional material in the desired range. These granules contain 20% active ingredient. 
     EXAMPLE 16 
     Wettable Powder 
     
         ______________________________________2-{[(4,6-Dimethoxy-1,3,5-triazin-2-yl)aminocarbonyl]-aminosulfonyl}-1,4-benzenedicarboxylic acid,dimethyl ester               65%dodecylphenol polyethyleneglycol ether                 2%sodium ligninsulfonate       4%sodium silicoaluminate       6%montmorillonite (calcined)   23%______________________________________ 
    
     The ingredients are thoroughly blended. The liquid surfactant is added by spraying upon the solid ingredients in the blender. After grinding in a hammer mill to produce particles essentially all below 100 microns, the material is reblended, sifted through a U.S.S. No. 50 sieve (0.3 mm opening) and packaged. 
     EXAMPLE 17 
     Wettable Powder 
     
         ______________________________________2-{[(4-Methoxy-5-methylpyrimidin-2-yl)aminocarbonyl]-aminosulfonyl}-1,4-benzenedicarboxylic acid,dimethyl ester                50%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 18 
     Oil Suspension 
     
         ______________________________________2-{([4-(2-Ethoxy-1-methyl-2-oxoethoxy)-6-methyl-1,3,5-triazin-2-yl]aminocarbonyl)aminosulfonyl}-1,4-benzenedicarboxylic acid,dimethyl ester                25%polyoxyethylene sorbitolhexaoleate                     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 suspensions may be applied directly, but preferably after being extended with oils or emulsified in water. 
     EXAMPLE 19 
     Aqueous Suspension 
     
         ______________________________________2-{[(4,6-Dimethoxypyrimidin-2-yl)aminocarbonyl]amino-sulfonyl}-1,4-benzenedicarboxylic acid,dimethyl ester               25%hydrated attapulgite         3%crude calcium ligninsulfonate                        10%sodium dihydrogen phosphate  0.5%water                        61.5%______________________________________ 
    
     The ingredients are ground together in a ball or roller mill until the solid particles have been reduced to diameters under 10 microns. 
     EXAMPLE 20 
     Extruded Pellet 
     
         ______________________________________2-{[(4-Methoxy-6-methyl-1,3,5-triazin-2-yl)aminocarbonyl]-aminosulfonyl}-1,4-benzenedicarboxylic acid,dimethyl ester                25%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 21 
     Solution 
     
         ______________________________________2-{[(4,6-Dimethoxypyrimidin-2-yl)aminocarbonyl]amino-sulfonyl}-1,4-benzenedicarboxylic acid,dipropyl ester                 5%dimethylformamide             95%______________________________________ 
    
     The ingredients are combined and stirred to produce a solution, which can be used for low volume applications. 
     UTILITY 
     The compounds of the present invention are powerful herbicides. They have utility for broad-spectrum pre- and/or post-emergence weed control in areas where complete control of all vegetation is desired, such as around fuel storage tanks, ammunition depots, industrial storage areas, parking lots, drive-in theaters, around billboards, highway and railroad structures. Alternatively, the subject compounds are useful for the selective pre- or post-emergence weed control in crops, such as wheat, cotton, soybeans and corn. The compounds are particularly useful for the post-emergence control of weeds in corn. 
     The rates of application for the compounds of the invention are determined by a number of factors, including their use as selective or general herbicides, the crop species involved, the types of weeds to be controlled, weather and climate, formulations selected, mode of application, amount of foilage present, etc. In general terms, the subject compounds should be applied at levels of around 0.10 to 20 kg/ha, the lower rates being suggested for use on lighter soils and/or those having a low organic matter content, for selective weed control or for situations where only short-term persistence is required. 
     The compounds of Formula I may be combined with other herbicides and are particularly useful in combination with 3-(3,4-dichlorophenyl)-1,1-dimethyl urea; the triazines such as 2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine: the uracils such as 5-bromo-3-sec-butyl-6-methyluracil; N-(phosponomethyl)-glycine; 3-cyclohexyl-1-methyl-6-dimethylamino-s-triazine-2,4(1H,3H)-dione; N,N-dimethyl-2,2-diphenyl-acetamide; 2,4-dichlorophenoxyacetic acid (and closely related compounds); 4-chloro-2-butynyl-3-chlorophenylcarbamate; diisopropylthiolcarbamic acid, ester with 2,3-dichloroallyl alcohol; diisopropylthiolcarbamic acid, S-(2,3,3-trichloroallyl)ester; ethyl-N-benzoyl-N-(3,4-dichlorophenyl)-2-aminopropionate; 1,2-dimethyl-3,5-diphenylpyrazolium methylsulfate; methyl 2-[4-(2,4-dichlorophenoxy)-phenoxy]propanoate; 4-amino-6-tert-butyl-3-(methylthio)-1,2,4-triazin-5(4H)-one; 3-(3,4-dichlorophenyl)-1-methoxy-1-methylurea; 3-isopropyl-1H-2,1,3-benzothiodiazin-(4)-3H-one-2,2-dioxide; α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine; 1,1&#39;-dimethyl-4,4&#39;-bipyridinium ion; monosodium methanearsonate; 2-chloro-2&#39;,6&#39;-diethyl(methoxymethyl)-acetanilide; and 1,1-dimethyl-3-(α,α,α-trifluoro-m-tolyl)-urea. 
     The activity of these compounds was discovered in greenhouse tests. The tests are described and the data resulting from them are shown below. 
     Test Procedure A 
     Seeds of crabgrass (Digitaria spp.), barnyardgrass (Echinochloa crusgalli), wild oats (Avena fatua), cassia (Cassia tora), morningglory (Ipomoea spp.), cocklebur (Xanthium spp.), sorghum, corn, soybean, rice, wheat and nutsedge tubers (Cyperus rotundus) were planted in a growth medium and treated preemergence with a nonphytotoxic solvent solution of the compounds of Test A. At the same time, cotton having five leaves (including cotyledonary ones), bush beans with the third trifoliate leaf expanding, crabgrass with two leaves, barnyardgrass with two leaves, wild oats with two leaves, cassia with three leaves, (including cotyledonary ones), morningglory with four leaves (including the cotyledonary ones), cocklebur with four leaves (including the cotyledonary ones), sorghum with four leaves, corn with four leaves, soy-bean with two cotyledonary leaves, rice with three leaves, wheat with one leaf, and nutsedge with three-five leaves were sprayed with a nonphytotoxic solvent solution of the compounds of Test A. Other containers of the above mentioned weeds and crops were treated pre- or post-emergence with the same nonphytotoxic solvent so as to provide a solvent control. A set of untreated control plants was also included for comparison. Pre-emergence and post-emergence treated plants and controls were maintained in a greenhouse for sixteen days, then all treated plants were compared with their respective controls and rated visually for response to treatment, using the following rating system and symbols. 
     0=no effect 
     10=maximum effect 
     C=chlorosis or necrosis 
     D=defoliation 
     E=emergence inhibition 
     G=growth retardation 
     H=formative effects 
     U=unusual pigmentation 
     
                                           TEST A__________________________________________________________________________        ##STR94##                                  ##STR95##Rate, kg/ha 0.4                       0.4__________________________________________________________________________POST-EMERGENCEBUSHBEAN    9C                        9CCOTTON      9C                        4C,9GMORNINGGLORY       10C                       2C,8GCOCKLEBUR   10C                       5GCASSIA      9C                        2GNUTSEDGE    7C                        0CRABGRASS   1C,7G                     0BARNYARDGRASS       2C,7H                     1CWILD OATS   2C,8G                     2C,5GWHEAT       10C                       2C,6GCORN        2C,9H                     1C,5HSOYBEAN     3C,7G                     2C,5GRICE        3C,8G                     3C,8GSORGHUM     2C,8G                     2C,9GPRE-EMERGENCEMORNINGGLORY       9G                        8GCOCKLEBUR   8G                        1C,5HCASSIA      7G                        1C,5GNUTSEDGE    9G                        10ECRABGRASS   2G                        3GBARNYARDGRASS       1C,6G                     2CWILD OATS   4G                        2C,6GWHEAT       9H                        9HCORN        1C,3G                     2C,8GSOYBEAN     0                         0RICE        10E                       10ESORGHUM     1C,9H                     1C__________________________________________________________________________        ##STR96##                                  ##STR97##Rate, kg/ha 0.4                       0.4__________________________________________________________________________POST-EMERGENCEBUSHBEAN    4C,9G,6Y                  9CCOTTON      4C,9G                     5C,9GMORNINGGLORY       10C                       2C,8GCOCKLEBUR   9C                        2C,6GCASSIA      5C,9G                     2C,8GNUTSEDGE    4G                        3GCRABGRASS   2G                        2GBARNYARDGRASS       1C,2H                     1CWILD OATS   1C,6G                     3C,7GWHEAT       3C,9G                     9CCORN        2C                        1HSOYBEAN     7C                        2HRICE        9C                        2C,8GSORGHUM     2C,9H                     2C,9GPRE-EMERGENCEMORNINGGLORY       9G                        9GCOCKLEBUR   8G                        8GCASSIA      7G                        8GNUTSEDGE    9G                        10ECRABGRASS   1C,8G                     4GBARNYARDGRASS       2C,7G                     5CWILD OATS   2C,8H                     2C,5HWHEAT       9H                        9HCORN        1C,2G                     3GSOYBEAN     1C,4G                     3GRICE        10E                       10ESORGHUM     9G                        9G__________________________________________________________________________        ##STR98##                                  ##STR99##Rate, kg/ha 0.4                       0.4__________________________________________________________________________POST-EMERGENCEBUSHBEAN    3C,7D,6Y                  9CCOTTON      1C                        5C,7GMORNINGGLORY       2C,5G                     9CCOCKLEBUR   2C,7G                     10CCASSIA      2C                        1C,5GNUTSEDGE    0                         1CCRABGRASS   0                         3GBARNYARDGRASS       0                         0WILD OATS   0                         1C,7GWHEAT       1C,3G                     2C,8GCORN        0                         1C,4GSOYBEAN     0                         1H,6GRICE        0                         9GSORGHUM     2C,8G                     9HPRE-EMERGENCEMORNINGGLORY       5G                        9GCOCKLEBUR   6G                        9GCASSIA      2C,5G                     2C,9GNUTSEDGE    0                         3GCRABGRASS   0                         0BARNYARDGRASS       1H                        0WILD OATS   1H                        2C,8HWHEAT       7G                        9HCORN        0                         2C,5GSOYBEAN     0                         1H,5GRICE        9H                        9HSORGHUM     8G                        9H__________________________________________________________________________        ##STR100##                                  ##STR101##Rate, kg/ha 0.4                       0.4__________________________________________________________________________POST-EMERGENCEBUSHBEAN    3C,7G,6Y                  3C,5G,6YCOTTON      0                         3BMORNINGGLORY       1C                        2C,5HCOCKLEBUR   5G                        2C,5GCASSIA      0                         1CNUTSEDGE    0                         0CRABGRASS   0                         0BARNYARDGRASS       0                         1CWILD OATS   0                         0WHEAT       0                         1CCORN        0                         1CSOYBEAN     0                         1C,2HRICE        5G                        2GSORGHUM     7G                        1CPRE-EMERGENCEMORNINGGLORY       7G                        2GCOCKLEBUR   8G                        5GCASSIA      0                         1CNUTSEDGE    0                         2GCRABGRASS   0                         2GBARNYARDGRASS       1H                        2C,5GWILD OATS   0                         2GWHEAT       7G                        2GCORN        1C                        1C,3GSOYBEAN     1C                        0RICE        9H                        2C,9HSORGHUM     6G                        2C,4G__________________________________________________________________________        ##STR102##                                  ##STR103##Rate, kg/ha 0.4                       0.4__________________________________________________________________________POST-EMERGENCEBUSHBEAN    3S,6G,6Y                  2S,8G,6YCOTTON      2B,1H                     1B,2CMORNINGGLORY       1B                        1BCOCKLEBUR   1B                        1BCASSIA      1B                        1BNUTSEDGE    0                         0CRABGRASS   0                         0BARNYARDGRASS       0                         0WILD OATS   0                         0WHEAT       0                         0CORN        2G                        2GSOYBEAN     0                         1CRICE        0                         0SORGHUM     0                         0PRE-EMERGENCEMORNINGGLORY       2G                        2GCOCKLEBUR   3G                        5GCASSIA      0                         0NUTSEDGE    0                         0CRABGRASS   0                         0BARNYARDGRASS       1C                        1CWILD OATS   0                         0WHEAT       0                         0CORN        0                         0SOYBEAN     0                         0RICE        0                         0SORGHUM     0                         0__________________________________________________________________________ 
    
     Test B 
     Two plastic bulb pans were filled with fertilized and limed Fallsington silt loam soil. 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 (Avenua fatua), johnsongrass (Sorghum halepense), dallisgrass (Paspalum dilatatum), giant foxtail (Setaria faberii), cheatgrass (Bromus secalinus), mustard (Brassica arvensis), cocklebur (Xanthium pennsylvanicum), pigweed (Amaranthus retroflexus), morningglory (Ipomoea hederacea), cassia (Cassia tora), 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 sugarbeets. The above four containers were treated pre-emergence with several test compounds within the scope of this 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 Test B. Note that certain compounds are useful as pre-emergence treatments for weed control in crops such as soybeans, corn, wheat and cotton. 
     
                                           Test B__________________________________________________________________________    ##STR104##                                ##STR105##Rate, kg/ha   0.125       0.5         0.125       0.5__________________________________________________________________________Crabgrass   0           0           0           0Barnyardgrass   0           5G          3G          3GSorghum 3G          3G          3G          5GWild Oats   0           4G          0           3GJohnsongrass   0           3G          0           2GDallisgrass   0           0           0           3GGiant foxtail   0           3H          0           0Ky. bluegrass   5G          7G,5C       0           6GCheatgrass   3G          7G,5E       5G          7G,5ESugarbeets   0           4G,5E       2G          6G,8ECorn    0           2G          0           0Mustard 7G          8G,5C       6G          8GCocklebur   --          6G          0           2GPigweed 7G,5C       8G,8C       7G,5C       8G,8CNutsedge   0           6G,3C       0           0Cotton  0           3G          0           0Morningglory   0           8G          0           6GCassia  0           2G          0           0Teaweed 0           0           0           0Velvetleaf   0           0           0           5GJimsonweed   0           0           0           0Soybean 0           0           0           0Rice    5G,3C       8G,8C       3G          7G,4CWheat   0           0           0           0__________________________________________________________________________    ##STR106##Rate, kg/ha   0.125       0.5__________________________________________________________________________Crabgrass   0           0Barnyardgrass   0           0Sorghum 0           0Wild Oats   0           0Johnsongrass   0           2GDallisgrass   0           3GGiant foxtail   0           0Ky. bluegrass   0           0Cheatgrass   0           2GSugarbeets   0           0Corn    0           0Mustard 2G          3GCocklebur   0           0Pigweed 0           3GNutsedge   0           0Cotton  0           3HMorningglory   0           0Cassia  0           0Teaweed 0           0Velvetleaf   0           0Jimsonweed   0           0Soybean 0           0Rice    0           3G,3CWheat   0           0__________________________________________________________________________ 
    
     Test C 
     Twenty-five cm diameter plastic pots filled with Fallsington silt loam were planted to soybeans, cotton, alfalfa, corn, rice, wheat, sorghum, velvetleaf, (Abutilon theophrasti), sesbania (Sesbania exaltata), Cassia (Cassia tora), morningglory (Ipomoea hederacea), jimsonweed (Datura stramonium), cocklebur (Xanthium pennsylvanicum), crabgrass (Digitaria spp.), nutsedge (Cyperus rotundus), barnyardgrass (Echinochloa crusgalli), giant foxtail (Sestaria faberii) and wild oats (Avenua fatua). Approximately 2-1/2 weeks after planting, the young plants and the soil around them were sprayed overall with the test chemical dissolved in a nonphytotoxic solvent. Fourteen days after treatment, all species were compared to untreated controls and visually rated for response to treatment. The rating system was as described previously for Test A. The data are presented in Test C. 
     
                                           Test C__________________________________________________________________________    ##STR107##                                ##STR108##Rate, kg/ha   0.125         0.5           0.125        0.5__________________________________________________________________________Velvetleaf   --            --            --           --Sesbania   --            --            --           --Cassia  --            --            --           --Cotton  10G,9C        10C           10C          10CMorningglory   10C           10C           10C          10CAlfalfa 5G            8G,3C         8G,7C        2GJimsonweed   10G,9C        10G,9C        5G           10G,9CCocklebur   10C           10C           --           10CCorn    0             2C            0            0Crabgrass   0             5G            0            0Rice    --            --            --           --Nutsedge   --            3G            0            2GBarnyardgrass   0             0             0            2GWheat   3G            7G            7G           8GGiant Foxtail   10G,5H        10C           10G,8C       10G,3HWild Oats   8G            8G,3C         8G           9G,2CSorghum 8G,3C         10G,3C        10G,3C       10G,3CSoybean 10G,9C        10C           10C          10G,8C__________________________________________________________________________ 
    
     Test D 
     Two ten-inch in diameter plastic pans lined with polyethylene liners were filled with prepared Fallsington silt loam soil. One pan was planted with seeds of wheat (Triticum aestivum), barley (Hordeum vulgare), wild oats (Avena fatua), downy brome (Bromus tectorum), cheatgrass (Bromus secalinus), blackgrass (Alopecurus myosuroides), annual bluegrass (Poa annua), green foxtail (Setaria viridis), quackgrass (Agropyron repens), Italian ryegrass (Lolium multiflorum) and ripgut brome (Bromus rigidus). The other pan was planted with seeds of Russian thistle (Salsola Kali), tansy mustard (Descurainia pinnata), smartweed (Polygonum pennsylvanicum), jimhill mustard (Sisymbrium altissimum), kochia (Kochia scoparia), shepherd&#39;s purse (Capsella bursapastoris), false chamomile (Matricaria inodora), black nightshade (Solanum nigrum), yellow rocket (Barbarea vulgaris), wild mustard (Brassica kaber) and wild buckwheat (Polygonum convolvulus). The above two pans were treated pre-emergence. At the same time, two pans in which the above plant species were growing were treated post-emergence. Plant height at the time of treatment ranged from 1-15 cm depending on plant species. 
     The compounds applied were diluted with a non-phytotoxic solvent and sprayed over-the-top of the pans. An untreated control and a solvent-alone control were included for comparison. All treatments were maintained in the greenhouse for 20 days at which time the treatments were compared to the controls and the effects visually rated. The recorded date are presented in Test D. 
     
                                           Test D__________________________________________________________________________     ##STR109##__________________________________________________________________________Rate, kg/ha    0.06           0.25__________________________________________________________________________Pre-emergencewheat    0              0barley   0              0wild oats    0              0downy brome    1G             5Gcheatgrass    1G             5Gblackgrass    2G             1C,3Gannual bluegrass    1G             3Ggreen foxtail    0              2C,2Gquackgrass    1G             1C,3GItalian ryegrass    2G             2Gripgut brome    0              0Russian thistle    1G             1Gtansy mustard    8G             7C,9Gsmartweed    3G             5C,5Gjimhill mustard    7G             3C,8Gkochia   5G             5Gshepherd&#39;s purse    8G             7C,8Gfalse chamomile    1C,6G          4C,8Gblack nightshade    1C,2G          3C,3Gyellow rocket    7G             2C,7Gwild mustard    7G             4C,8Gwild buckwheat    2G             3C,3GPost-emergencewheat    1C,2G          7Cbarley   3C,7G          8Cwild oats    0              5C,4Gdowny brome    1C,4G          4C,7Gcheatgrass    6C,5G          8Cblackgrass    4C,5G          7Cannual bluegrass    2C,3G          5C,5Ggreen foxtail    4C,5G          7Cquackgrass    3C,4G          5C,5GItalian ryegrass    2C,2G          5C,7Gripgut brome    1C,4G          7CRussian thistle    5C             8Ctansy mustard    3C,5G          5C,5Gsmartweed    5C,5G          7Cjimhill mustard    9C             9Ckochia   2G             5C,7Gshepherd&#39;s purse    7C             9Cfalse chamomile    8C,8G          9C,9Gblack nightshade    4C,4G          7C,7Gyellow rocket    8C             9Cwild mustard    10C            10Cwild buckwheat    1C,3G          4C,3G__________________________________________________________________________     ##STR110##__________________________________________________________________________Rate, kg/ha    0.06           0.25__________________________________________________________________________Pre-emergencewheat    0              0barley   0              0wild oats    0              0downy brome    0              0cheatgrass    0              0blackgrass    0              0annual bluegrass    0              0green foxtail    0              0quackgrass    0              0Italian ryegrass    0              0ripgut brome    0              0Russian thistle    0              0tansy mustard    0              3Gsmartweed    0              2Gjimhill mustard    0              2Gkochia   0              0shepherd&#39;s purse    0              2Gfalse chamomile    0              0black nightshade    0              0yellow rocket    0              0wild mustard    0              0wild buckwheat    0              0Post-emergencewheat    3C,3G          7Cbarley   9C             9Cwild oats    0              3Cdowny brome    4G             2C,5Gcheatgrass    6C,5G          7Cblackgrass    7C             7Cannual bluegrass    1C,2G          4C,5Ggreen foxtail    6C             7Cquackgrass    4C,4G          5C,5GItalian ryegrass    7C             8Cripgut brome    10C            9CRussian thistle    2C             5Ctansy mustard    0              3C,4Gsmartweed    2G             6Cjimhill mustard    5C,5G          10Ckochia   0              0shepherd&#39;s purse    2G             8Cfalse chamomile    0              2C,3Gblack nightshade    1C,2G          8Cyellow rocket    5C,5G          8Cwild mustard    7C             8Cwild buckwheat    0              2C,3G__________________________________________________________________________