HERBICIDAL PYRIMIDINES

Specific embodiments include compounds of Formula I selected from the group consisting of:

• methyl 6-amino-5-bromo-2-cyclopropyl-4-pyrimidinecarboxylate,
• ethyl 6-amino-5-bromo-2-cyclopropyl-4-pyrimidinecarboxylate,
• phenylmethyl 6-amino-5-bromo-2-cyclopropyl-4-pyrimidinecarboxylate,
• 6-amino-5-bromo-2-cyclopropyl-4-pyrimidinecarboxylic acid monosodium salt,
• methyl 6-amino-5-chloro-2-cyclopropyl-4-pyrimidinecarboxylate,
• phenylmethyl 6-amino-5-chloro-2-cyclopropyl-4-pyrimidinecarboxylate,
• 6-amino-5-chloro-2-cyclopropyl-4-pyrimidinecarboxylic acid monosodium salt,
• ethyl 6-amino-5-chloro-2-cyclopropyl-4-pyrimidinecarboxylate,
• methyl 6-amino-5-chloro-2-(4-chlorophenyl)-4-pyrimidinecarboxylate,
• ethyl 6-amino-5-chloro-2-(4-chlorophenyl)-4-pyrimidinecarboxylate,
• 6-amino-5-chloro-2-(4-chlorophenyl)-4-pyrimidinecarboxylic acid,
• ethyl 6-amino-2-(4-bromophenyl)-5-chloro-4-pyrimidinecarboxylate,
• methyl 6-amino-2-(4-bromophenyl)-5-chloro-4-pyrimidinecarboxylate, and
• 6-amino-2-(4-bromophenyl)-5-chloro-4-pyrimidinecarboxylic acid.

Also noteworthy as embodiments are herbicidal compositions of the present invention comprising the compounds of embodiments described above.

This invention also relates to a method for controlling undesired vegetation comprising applying to the locus of the vegetation herbicidally effective amounts of the compounds of the invention (e.g., as a composition described herein). Of note as embodiments relating to methods of use are those involving the compounds of embodiments described above.

Of note is a compound of Formula I, including all geometric and stereoisomers, N-oxides or agriculturally suitable salts thereof, agricultural compositions containing them and their use as herbicides wherein R² is CO₂R¹², CH₂OR¹³, CHO, C(=NOR14)H, C(R¹⁵)(R¹⁶)CO₂R¹⁷ or C(=O)N(R¹⁸)R¹⁹; each R⁷ is independently halogen, C₁-C₄ alkyl, C₁-C₃ haloalkyl, C₁-C₃ alkoxy, C₁-C₃ haloalkoxy, C₁-C₃ alkylthio or C₁-C₃ haloalkylthio,; R¹² is H; or a radical selected from C₁-C₁₄ alkyl, C₃-C₁₂ cycloalkyl, C₄-C₁₂ alkylcycloalkyl, C₄-C₁₂ cycloalkylalkyl, C₂-C₁₄ alkenyl and C₂-C₁₄ alkynyl, each radical optionally substituted with 1-3 R²⁷; R¹³ is H, C₁-C₁₀ alkyl optionally substituted with 1-3 R²⁸ or benzyl; R¹⁴ is H, C₁-C₄ alkyl or C₁-C₄ haloalkyl; R¹⁵ and R¹⁶ are independently H, halogen, C₁-C₄ alkyl, C₁-C₄ haloalkyl, hydroxy or C₁-C₄ alkoxy; R¹⁷ is C₁-C₁₀ alkyl optionally substituted with 1-3 R²⁹ or benzyl; R¹⁸ and R¹⁹ are independently H or C₁-C₄ alkyl; each R²⁷ is independently halogen, hydroxycarbonyl, C₂-C₄ alkoxycarbonyl, hydroxy, C₁-C₄ alkoxy, C₁-C₄ haloalkoxy, C₁-C₄ alkylthio, C₁-C₄ haloalkylthio, amino, C₁-C₄ alkylamino, C₂-C₄ dialkylamino, -CH⁅O(CH2)_n⁆ or phenyl optionally substituted with 1-3 R⁴⁴; or two R²⁷ are taken together with the carbon atom to which they are attached to form a carbonyl moiety; each R²⁸ and R²⁹ is independently halogen, C₁-C₄ alkoxy, C₁-C₄ haloalkoxy, C₁-C₄ alkylthio, C₁-C₄ haloalkylthio, amino, C₁-C₄ alkylamino or C₂-C₄ dialkylamino; each R³⁰, R³¹ and R³² is independently halogen, hydroxy, C₁-C₄ alkoxy, C₁-C₄ haloalkoxy, C₁-C₄ alkylthio, C₁-C₄ haloalkylthio, amino, C₁-C₄ alkylamino, C₂-C₄ dialkylamino, or C₂-C₄ alkoxycarbonyl; each R³⁸ is independently halogen, C₁-C₃ alkyl, C₁-C₃ alkoxy, C₁-C₃ haloalkoxy, C₁-C₃ alkylthio, C₁-C₃ haloalkylthio, amino, C₁-C₃ alkylamino, C₂-C₄ dialkylamino or C₂-C₄ alkoxycarbonyl; each R⁴⁴ is independently halogen, C₁-C₄ alkyl, C₁-C₃ haloalkyl, hydroxy, C₁-C₄ alkoxy, C₁-C₃ haloalkoxy, C₁-C₄ alkylthio, C₁-C₃ haloalkylthio, amino, C₁-C₃ alkylamino, C₂-C₄ dialkylamino or nitro; m is an integer from 2 to 5; and n is an integer from 1 to 4. Also of note is a compound of Formula I, including all geometric and stereoisomers, N-oxides or agriculturally suitable salts thereof, agricultural compositions containing them and their use as herbicides wherein each R⁵ and R⁶ is independently halogen, C₁-C₂ alkyl or C₁-C₂ haloalkyl; R¹⁵ is H, halogen, C₁-C₄ alkyl, C₁-C₄ haloalkyl, hydroxy, C₁-C₄ alkoxy or C₂-C₄ alkylcarbonyloxy; R¹⁶ is H, halogen, C₁-C₄ alkyl or C₁-C₄ haloalkyl; R²⁴ is H, C₁-C₄ alkyl optionally substituted with 1-2 R³⁰, C₂-C₄ alkenyl optionally substituted with 1-2 R³¹, or C₂-C₄ alkynyl optionally substituted with 1-2 R³²; or R²⁴ is C(=O)R³³, nitro, OR³⁴, S(O)₂R³⁵ or N(R³⁶)R³⁷; each R³³ is independently H, C₁-C₄ alkyl, C₁-C₃ haloalkyl, C₁-C₄ alkoxy, phenoxy or benzyloxy; R³⁴ is H, C₁-C₄ alkyl, C₁-C₃ haloalkyl,; and R³⁶ is H or C₁-C₄ alkyl.

The compounds of Formula I can be prepared by one or more of the following methods and variations as described in Schemes 1 through 7 and accompanying text. The definitions of R, R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R¹², R¹³, R¹⁴, R¹⁵, R¹⁶, R¹⁷, R¹⁸, R¹⁹, R²⁰, R²¹, R²², R²³, R²⁴, R²⁵, R²⁷, R²⁸, R²⁹, R³⁰, R³¹, R³², R³³, R³⁴, R³⁵, R³⁶, R³⁷, R³⁸, R³⁹, R⁴⁰, R⁴¹, R⁴², R⁴³, R⁴⁴, R⁴⁵, R⁴⁶, R⁴⁷, R⁴⁸, R⁴⁹, R⁵⁰, R⁵¹, R⁵², R⁵³, R⁵⁴, R⁵⁵, R⁵⁶, R⁵⁷, R⁵⁸, R⁵⁹, R⁶⁰, R⁶¹, Y, j, k and n in the compounds of Formulae I through 12 below are as defined above in the Summary of the Invention and description of embodiments unless otherwise indicated.

Compounds of Formula I can be prepared from chlorides of Formula 2 by reaction with amines of Formula 3, optionally in the presence of a base such as triethylamine or potassium carbonate as outlined in Scheme 1. The reaction can be run in a variety of solvents including tetrahydrofuran, p-dioxane, ethanol and methanol with optimum temperatures ranging from room temperature to 200 °C. The method of Scheme 1 is illustrated in Step C of Example 1, Steps D1 and D2 of Example 2, and Step B of Example 4.

Compounds of Formula 2 can be prepared from hydroxy compounds of Formula 4 (which may exist in the keto form) by reaction with a chlorination reagent such as phosphorous oxychloride or thionyl chloride, optionally in the presence of a base such as N,N-dimethylaniline as shown in Scheme 2. The reaction can be run neat or in the presence of a solvent such as N,N-dimethylformamide at temperatures ranging from room temperature to 120 °C. The method of Scheme 2 is illustrated in Step C of Example 1, Steps C1 and C2 of Example 2, and Step B of Example 4.

Compounds of Formula 4 can be prepared by the condensation of amidines of Formula 5 with keto esters of Formula 6 in solvents such as methanol or ethanol at temperatures ranging from room temperature to the reflux temperature of the solvent as shown in Scheme 3. Optionally a base such as a metal alkoxide or 1,1,3,3-tetramethylguanidine may be employed. The method of Scheme 3 is illustrated in Step A of Examples 1 and 4, and Steps A1 and A2 of Example 2. wherein R⁸⁰ is a carbon moiety such as alkyl, preferably C₁-C₂ alkyl.

Compounds of Formula 4 wherein R³ is a halogen can be prepared from compounds of Formula 4 wherein R³ is hydrogen by reaction with a halogen such as bromine or a halogenating reagent such as an N-halosuccinimide or a sulfuryl halide in a variety of solvents including acetic acid, N,N-dimethylformamide, dichloromethane and carbon tetrachloride at temperatures ranging from 0-100 °C as shown in Scheme 4. The method of Scheme 4 is illustrated in Step B of Example 1, and Steps B1 and B2 of Example 2.

Also, compounds of Formula I wherein R³ is a halogen can be prepared from compounds of Formula I wherein R³ is hydrogen by reaction with a halogenating reagent analogous to the method of Scheme 4. This alternative method is illustrated in Step C of Example 4.

A particularly useful preparation of compounds of Formula 4 wherein R³ is a halogen and R² is CO₂R¹² is the reaction of compounds of Formula 4 where R³ is hydrogen and R² is CH(OR¹²)₂ with a halogenating reagent and oxidizing reagent such as an N-halosuccinimide or bromine (when R³ is bromine) in a solvent such as dichloromethane, trichloromethane or tetrachloromethane at temperatures ranging from room temperature to the reflux temperature of the solvent as shown in Scheme 5.

Compounds of Formula 5 and 6 are either commercially available or can be prepared by known methods. (For example see: P. J. Dunn in Comprehensive Organic Functional Group Transformations, A. R. Katritzky, O. Meth-Cohn; C.W. Rees Eds, Pergamon Press; Oxford, 1995; vol. 5, pp.741-782; T.L. Gillchrist in Comprehensive Organic Functional Group Transformations, A. R. Katritzky, O. Meth-Cohn, C.W. Rees Eds., Pergamon Press; Oxford, 1995; vol. 6, pp. 601-637 and B. R. Davis, P. J. Garratt in Comprehensive Organic Synthesis, B. M. Trost Ed., Pergamom Press; Oxford, 1991; vol. 2, pp. 795-803.)

Alternatively compounds of Formula I can be prepared from corresponding compounds of Formula 7 wherein X¹ is a leaving group, such as a halogen or alkylsulfonyl group (e.g., methanesulfonyl, trifluoromethanesulfonyl, benzenesulfonyl), as shown in Scheme 6. wherein M¹ is B(OH)₂, Sn(n-Bu)₃, MgX¹ or ZnX¹; R¹ is optionally substituted cyclopropyl, optionally substituted isopropyl or optionally substituted phenyl; and X¹ is a leaving group. This method involves palladium-catalyzed reaction of a compound of Formula 7 with a compound of Formula 8 in the form of a boronic acid (e.g., M¹ is B(OH)₂), an organotin reagent (e.g., M¹ is Sn(n-Bu)₃), a Grignard reagent (e.g., M¹ is MgX¹) or an organozinc reagent (e.g., M¹ is ZnX¹). (For example see: N. Ali, A. McKillop, M. Mitchell, R. Rebelo, A. Ricardo, P. Wallbank, Tetrahedron, 1992, 48, 8117-8126; J. Solberg, K. Undheim, Acta Chem. Scand, 1989, 43, 62-68, V. Bonnet, F. Mongin, F. Trécourt, G. Quéguiner and P. Knochel, Tetrahedron, 2002, 58, 4429-4438.)

Compounds of Formula 7 wherein X¹ is a halogen can be prepared from dihalo compounds of Formula 12 with an amine of Formula 3 optionally catalyzed by a base such as triethylamine or potassium carbonate in a variety of solvents including tetrahydrofuran and dichloromethane at temperatures ranging from 0 °C to the reflux temperature of the solvent as shown in Scheme 7. Compounds of Formula 12 can be prepared by known methods. (For example, see H. Gershon, J. Org. Chem., 1962, 27, 3507-3510.)

As shown in Scheme 8, compounds of Formula I wherein R² is CO₂R¹² can also be prepared from compounds of Formula 13 by means of a carbonylation reaction. Typical conditions are 1-10 atmospheres of carbon monoxide in the presence of a palladium catalyst in a mixture of an alcohol and another solvent such as N,N dimethylformamide, N-methylpyrrolidinone or tetrahydrofuran at temperatures ranging from room temperature to 150 °C:

As shown in Scheme 9, compounds of Formula 13 can be prepared from compounds of Formula 14 by reaction with amines of Formula 3 in a reaction analogous to the method of Scheme 1.

As shown in Scheme 10, compounds of Formula 14 can be prepared from diols of Formula 15 by reaction with a halogenating agent such as phosphorous oxychloride or phosphorous oxybromide in a reaction analogous to the method of Scheme 2. (See H. Gershon, R. Braun, A. Scala and R. Rodin, J. Med Chem 1964, 7, 808-811 and M. H. Norman, N. Chen, Z. Chen, C. Fotsch, N. Han, R. Hurt, T. Jenkins J. Kincaid, L. Liu, Y. Lu, O. Moreno, V. J. Santora, J.D. Sonnenberg and W. Karbon, J. Med Chem, 2000, 43, 4288-4312 for examples of this method and for examples of preparation of compounds of Formula 15.)

Compounds of Formula I wherein R² comprises an ester function (e.g., CO₂R¹² wherein R¹² is other than H) can be prepared from corresponding carboxylic acid compounds of Formula I (e.g., wherein R¹² is H) by a wide variety of esterification methods known in the art. One method is illustrated in Example 3. Conversely, carboxylic acid compounds of Formula I can be prepared from the corresponding ester compounds by a wide variety of hydrolysis methods known in the art, such as saponfication.

It is recognized that some reagents and reaction conditions described above for preparing compounds of Formula I may not be compatible with certain functionalities present in the intermediates. In these instances, the incorporation of protection/deprotection sequences or functional group interconversions into the synthesis will aid in obtaining the desired products. The use and choice of the protecting groups will be apparent to one skilled in chemical synthesis (see, for example, T. W. Greene, P. G. M. Wuts, Protective Groups in Organic Synthesis, 2nd ed.; Wiley: New York, 1991). One skilled in the art will recognize that, in some cases, after the introduction of a given reagent as it is depicted in any individual scheme, it may be necessary to perform additional routine synthetic steps not described in detail to complete the synthesis of compounds of Formula I. One skilled in the art will also recognize that it may be necessary to perform a combination of the steps illustrated in the above schemes in an order other than that implied by the particular sequence presented to prepare the compounds of Formula I.

One skilled in the art will also recognize that compounds of Formula I and the intermediates described herein can be subjected to various electrophilic, nucleophilic, radical, organometallic, oxidation, and reduction reactions to add substituents or modify existing substituents.

Without further elaboration, it is believed that one skilled in the art using the preceding description can utilize the present invention to its fullest extent. The following Examples are, therefore, to be construed as merely illustrative, and not limiting of the disclosure in any way whatsoever. Steps in the following Examples illustrate a procedure for each step in an overall synthetic transformation, and the starting material for each step may not have necessarily been prepared by a particular preparative run whose procedure is described in other Examples or Steps. Percentages are by weight except for chromatographic solvent mixtures or where otherwise indicated. Parts and percentages for chromatographic solvent mixtures are by volume unless otherwise indicated. ¹H NMR spectra are reported in ppm downfield from tetramethylsilane; "s" means singlet, "d" means doublet, "t" means triplet, "q" means quartet, "m" means multiplet, "dd" means doublet of doublets, "ddd" means doublet of doublets of doublets, "dt" means doublet of triplets, "dq" means doublet of quartets, "br s" means broad singlet, "br d" means broad doublet.

To a mixture of ethyl 4,4-diethoxy-3-oxobutanoate (prepared according to the method of E. Graf, R. Troschutz, Synthesis, 1999, 7, 1216; 10.0 g, 46 mmol) and cyclopropanecarboximidamide monohydrochloride (Lancaster Synthesis, 5.0 g, 41 mmol) in methanol (100 mL) was added a methanol solution of sodium methoxide (5.4 M, 8.4 mL, 46 mmol). The reaction mixture was stirred overnight. The solvent was removed with a rotary evaporator. Dichloromethane was added and the mixture was filtered. The solvent from the filtrate was removed with a rotary evaporator. The residue was purified by medium pressure liquid chromatography (MPLC) (35→100% ethyl acetate in hexanes as eluant) to afford the title compound as a white solid (4.67 g).
¹H NMR (CDCl₃) δ 6.55 (s, 1H), 5.10 (s, 1H), 3.61 (m, 4H), 1.91 (m, 1H), 1.23 (m, 8H), 1.09 (m, 2H).

Additionally 3.24 g of an undehydrated product was obtained. This material could be converted to the title compound by refluxing it in methanol with a catalytic amount of pyridinium p-toluenesulfonate.

To a solution of 2-cyclopropyl-6-(diethoxymethyl)-4(1H)-pyrimidinone (i.e. the title product of Step A) (2.9 g, 12.1 mmol) in dichloromethane (75 mL) was added N-bromosuccinimide (4.76 g, 26.8 mmol). The reaction mixture was stirred overnight. The solvent was removed with a rotary evaporator. The residue was purified by MPLC (1→4% methanol in dichloromethane as eluant) to afford the title compound as a white solid (2.68 g).
¹H NMR (CDCl₃) δ 4.43 (q, 2H), 1.90 (m, 1H), 1.41 (t, 3H), 1.30 (m, 2H), 1.20 (m, 2H).

To a, solution of ethyl 5-bromo-2-cyclopropyl-1,6-dihydro-6-oxo-4-pyrimidine-carboxylate (i.e. the product of Step B) (1.07 g, 3.7 mmol) in N,N-dimethylformamide (15 mL) was added thionyl chloride (0.54 mL, 7.5 mmol). The reaction mixture was stirred for 2 h. The solvent was removed with a rotary evaporator. The residue was dissolved in dichloromethane, washed with saturated aqueous sodium bicarbonate and dried (Na₂SO₄). The solvent was removed with a rotary evaporator. The residue was dissolved in tetrahydrofuran (2 mL), and a methanolic solution of ammonia (7 N, 2 mL) was added. The reaction mixture was placed in a sealed vial and heated in a microwave reactor at 125°C for 2h. The reaction mixture was allowed to stand over the weekend. Dichloromethane was added and the reaction mixture was filtered. The solvent was removed with a rotary evaporator. The residue was purified by MPLC (10→30% ethyl acetate in hexanes as eluant) to afford the title product, a compound of the present invention, as a white solid (0.52 g).
¹H NMR (CDCl₃) δ 5.40 (br s, 2H), 4.44 (q, 2H), 2.05 (m, 1H), 1.01 (t, 3H), 1.05 (m, 2H), 0.99 (m, 2H).

Also isolated from the MPLC purification was the corresponding methyl ester, i.e. methyl 6-amino-5-bromo-2-cyclopropyl-4-pyrimidinecarboxylate, a further compound of the present invention, as a white solid (0.06 g).
¹H NMR (CDCl₃) δ 5.40 (br s, 2H), 3.97 (s, 3H) 2.05 (m, 1H), 1.05 (m, 2H), 0.99 (m, 2H).

To a mixture of diethyl oxalacetate sodium salt (150 g, 714 mmol) in methanol (300 mL) and water (150 mL) warmed to 30 °C was added 50% aqueous sodium hydroxide (56 g, 700 mmol) in water (60 mL) over 30 minutes, over which time the temperature remained at 25-30 °C and the pH at 11-12. Then the stirred mixture was heated for an additional 30 min at 35°C. To this mixture was added cyclopropanecarboximidamide monohydrochloride (64 g, 530 mol) in portions over 15 minutes. The orange solution was heated to 50 °C over 30 minutes and held at that temperature for 3 h. The reaction mixture was cooled to 35 °C, and concentrated hydrochloric acid (ca. 70 g, 0.7 mol) was added gradually (resulting in foaming) over 30 minutes at 30-40 °C until the pH was about 1.5-2.5. The mixture was concentrated with a rotary evaporator at 35-40 °C to remove alcohols, stirred for 3-4 h at 25 °C to complete crystallization of the product. After the mixture was cooled to 0 °C the solid was collected by filtration. The solid was washed with water (2 x 60 mL), suction-dried, and then dried in a vacuum-oven at 60°C to afford the title compound as a beige solid (ca. 60 g).
¹H NMR (DMSO-d₆) δ 6.58 (s, 1H), 1.95 (m, 1H), 1.0 (m, 4H).

To a mixture of diethyl oxalacetate sodium salt (210 g, 950 mmol) in methanol (500 mL) and water (400 mL) was added 50% aqueous sodium hydroxide (80 g, 1.0 mol) in water (60 mL) over 30 minutes, over which time the temperature remained at 25-30 °C and the pH at 11-12. Then the stirred mixture was heated for an additional 30 min at 30 °C. To this mixture was added cyclopropanecarboximidamide monohydrochloride (110 g, 910 mol). The orange solution was heated to 50 °C over 30 minutes and held at that temperature for 5 h. The reaction mixture was cooled to 30°C and concentrated to half volume at reduced pressure at 35-40 °C and concentrated hydrochloric acid (140 g, 1.4 mol) was added gradually (resulting in foaming) over 30 minutes at 25-30 °C until the pH was about 1-2. The mixture was stirred at 5 °C for 1 h to complete crystallization of the product. After the mixture was cooled to 0 °C the solid was collected by filtration. The solid was washed with water (3 x 60 mL), suction-dried, and then dried in a vacuum-oven at 70°C to afford the title compound as a beige solid (100 g); m.p. 235-236 °C (dec.).
¹H NMR (DMSO-d₆) δ 6.58 (s, 1H), 1.95 (m, 1H), 1.0 (m, 4H).

To a mixture of 2-cyclopropyl-1,6-dihydro-6-oxo-4-pyrimidinecarboxylic acid (i.e. the product of Step A1 or A2) (9.2 g, 52 mmol) in water (30 mL) and concentrated hydrochloric acid (22 g, 220 mmol) at 15°C was added dropwise aqueous sodium hypochlorite solution (11%, 40 g, 59 mmol) over 15 minutes so that with cooling the reaction mixture was maintained at 15-20 °C. The mixture was then held at 20-25 °C for 1 h. Solid sodium bisulfite (ca. 2 g) was added, and then aqueous sodium hydroxide solution (50%, 8 g, 0.10 mol) was added dropwise so that with cooling the reaction mixture was maintained at about 25 °C. The mixture was cooled to 10 °C, and the suspended product was isolated by filtration and washed with a minimum amount of cold water. The product was then dried to constant weight in vacuum-oven at 50 °C to afford the title compound (7.5 g).
¹H NMR (DMSO-d₆) δ 13.4 (br s, 1H), 1.95 (m, 1H), 1.0 (m, 4H).

To a mixture of 2-cyclopropyl-1,6-dihydro-6-oxo-4-pyrimidinecarboxylic acid (i.e.. the product of Step A1 or A2) (184 g, 1.02 mol) in water (45 mL) and concentrated hydrochloric acid (292 g, 3 mol) at 8-12 °C was added dropwise aqueous sodium hypochlorite solution (8.4%, 1.02 kg, 1.15 mol) over 2 h so that with cooling the reaction mixture was maintained at 8-10 °C. The mixture was then held at 10-12 °C for 1 h and the conversion was monitored by HPLC. When less than 5% of the starting material remained solid sodium bisulfite was added until a negative KI starch paper test was obtained. The mixture was cooled to 5 °C, and the suspended product was isolated by filtration and washed with a minimum amount of cold water. The product was then dried to constant weight in vacuum-oven at 50 °C to afford the title compound (194 g); m.p. 189-190 °C.
¹H NMR (DMSO-d₆) δ 13.4 (br s, 1H), 1.95 (m, 1H), 1.0 (m, 4H).

Phosphorus oxychloride (14 mL, 23 g, 0.15 mol) and 5-chloro-2-cyclopropyl-1,6-dihydro-6-oxo-4-pyrimidinecarboxylic acid (i.e. the product of Step B1 or B2) (75 g, 300 mmol) were combined and heated at 85 °C for 3 h. The reaction mixture was cooled to 30 °C and added over 30 minutes to a mixture of acetonitrile (50 mL) and ice water (80 mL), with the temperature maintained at 5-10 °C and the pH maintained in the range 1-3 by co-feeding aqueous ammonia (28%). The pH was adjusted to about 2, the mixture was concentrated at 25°C with a rotary evaporator to remove acetonitrile, and the precipitated product was isolated by filtration and washed with water (2 x 25 mL). The solid was dried in a vacuum oven to afford the title compound (ca. 7.0 g).
¹H NMR (DMSO-d₆) δ 2.23 (m, 1H), 1.2 (m, 2H), 1.0 (m, 2H).

Phosphorus oxychloride (200 mL, 328 g, 2.14 mol) and 5-chloro-2-cyclopropyl-1,6-dihydro-6-oxo-4-pyrimidinecarboxylic acid (i.e. the product of Step B1 or B2) (96.8 g, 451 mmol) were combined and heated at 90°C for 5 h. The reaction mixture was cooled to 50-60 °C and concentrated at reduced pressure to half volume. After cooling to 30°C the reaction mixture was added over 60 minutes to a mixture of t-butanol (200 mL) and water (300 mL), with the temperature maintained at 8-10 °C. The mixture was seeded, water (300 mL) was added gradually at 10-15 °C and the mixture was stirred for 1 h. After cooling to 5 °C the precipitated product was isolated by filtration and washed with water (3 x 50 mL). The solid was dried in a vacuum oven to afford the title compound (93 g).
¹H NMR (DMSO-d₆) δ 2.23 (m, 1H), 1.2 (m, 2H), 1.0 (m, 2H).

A mixture of 5,6-dichloro-2-cyclopropyl-4-pyrimidinecarboxylic acid (i.e. the product of Step Cl or C2) (5.1 g, 22 mmol), water (30 mL) and aqueous ammonia (28%, 8 g, 130 mmol) was heated at 80 °C for 3 h. The solution was concentrated at 50°C and 70 torr (9.3 kPa) pressure to about half volume to remove most of the excess ammonia. The resulting slurry was stirred at 20 °C, acidified to pH 2 with aqueous hydrochloric acid, cooled to 5 °C and filtered. The isolated solid was dried in a vacuum oven to afford the title product (4.2 g), a compound of the present invention.
¹H NMR (DMSO-d₆) δ 13.4 (br s, 1H), 1.95 (m, 1H), 1.0 (m, 4H).

A mixture of 5,6-dichloro-2-cyclopropyl-4-pyrimidinecarboxylic acid (i.e. the product of Step C1 or C2) (280 g, 1.2 mol), water (1.26 L) and aqueous ammonia (28%, 350 g, 5.76 mol) was heated at 80 °C for 5 h. The solution was concentrated at 50 °C and 70 torr (9.3 kPa) pressure to about half volume to remove most of the excess ammonia. The resulting slurry was stirred at 20°C, acidified to pH 1-2 with aqueous hydrochloric acid, cooled to 5 °C and filtered. The isolated solid was dried in a vacuum oven to afford the title product (270 g), a compound of the present invention.
¹H NMR (DMSO-d₆) δ 13.4 (br s, 1H), 1.95 (m, 1H), 1.0 (m, 4H).

To a solution of 6-amino-5-chloro-2-cyclopropyl-4-pyrimidinecarboxylic acid (i.e. the product of Step D1 or D2 of Example 2) (2.0 g, 8.5 mmol) in methanol (20 mL) was added dropwise thionyl chloride (4 mL, 70 mmol). The mixture was heated at reflux for 24 h. Concentrated sulfuric acid (5 drops) was added, and the reaction mixture was heated at reflux for 16 h. After the mixture was cooled, water (30 mL) was added, and aqueous ammonia (28%, 10 mL) was added dropwise. The mixture was cooled to 5 °C, and the solid was isolated by filtration, washed with water and dried in a vacuum oven at 40 °C to afford the title product (2.3 g), a compound of the present invention.
¹H NMR (CDCl₃) δ 5.41 (br s, 2H), 3.98 (s, 3H), 2.06 (m, 1H), 1.04 (m, 2H), 1.00 (m, 2H).

To a solution of 6-amino-5-chloro-2-cyclopropyl-4-pyrimidinecarboxylic acid (i.e. the product of Step D1 or D2 of Example 2) (8.5 g, 40 mmol) in methanol (120 mL) was added dropwise with cooling thionyl chloride (15 mL, 200 mmol). The mixture was heated at 60°C four 24 h. The mixture was concentrated to 25% of the original volume and diluted with water (100 mL). Phenolphthalein pH indicator was added, and 10% aqueous sodium hydroxide was added dropwise with cooling at 10-20 °C to bring the pH to 8-10. The solid was isolated by filtration, washed with water and dried in a vacuum oven at 50-60 °C to afford the title product (7.3 g), a compound of the present invention.
¹H NMR (CDCl₃) δ 5.41 (br s, 2H), 3.98 (s, 3H), 2.06 ,(m, 1H), 1.04 (m, 2H), 1.00 (m, 2H).

To a mixture of diethyl oxalacetate sodium salt (123.2 g, 586 mmol) in water (750 mL) was slowly added aqueous sodium hydroxide (50%, 47 g, 586 mmol). After 1 h the solids had dissolved. 4-Chlorobenzenecarboximidamide monohydrochloride (111.95 g, 586 mmol) was then added, and the mixture was heated at 70 °C overnight. After cooling to room temperature concentrated hydrochloric acid was slowly added (causing foaming) until the pH was lowered to 1.5. The solid was isolated by filtration and washed with water and methanol. The solid was then triturated twice with hot methanol, washed repeatedly with 1 N hydrochloric acid, then once with methanol and dried to afford the title compound (66.07 g).
¹H NMR (DMSO-d₆) δ 8.23 (d, 2H), 7.65 (d, 2H), 6.90 (s, 1H).

To phosphorus oxychloride (180 mL) was added 2-(4-chlorophenyl)-1,6-dihydro-6-oxo-4-pyrimidinecarboxylic acid (i.e. the product of Step A) (81.81 g, 326 mmol). The mixture was heated to 90 °C for 2.5 h. After cooling to room temperature the reaction mixture was slowly added to 1:2 acetonitrile:water (1.5 L) while keeping the temperature between 35 and 45°C. After the reaction mixture was stirred at room temperature for 30 minutes the resulting solid was isolated by filtration and washed with water. The solid was then combined with aqueous ammonia (5%, 2.1 L) and heated to 80 °C for 18 h. After 2 days at room temperature the solid was isolated by filtration and washed with water. A second crop was obtained by cooling the filtrate and refiltering. The combined solids were dried to afford the title compound (58.8 g).
¹H NMR (DMSO-d₆) δ 8.33 (d, 2H), 7.51 (d, 2H). 6.89 (s, 2H), 6.81 (s, 1H).

To a solution of 6-amino-2-(4-chlorophenyl)-4-pyrimidinecarboxylic acid (i.e. the product of Step B) (75 g, 300 mmol) in N,N dimethylformamide (300 mL) at 50°C was added portionwise N-chlorosuccinimide (44.1 g, 330 mmol). The temperature of the reaction mixture increased exothermically to 65 °C. Then the reaction mixture was heated at 55 °C for 3 h. Additional N-chlorosuccinimide (14 g, 90 mmol) was added portionwise, and the reaction mixture was maintained at 55 °C for 30 minutes. After the reaction mixture was cooled water was added. The resulting solid was isolated by filtration, washed with water, dissolved in ethyl acetate, washed with water and dried. The solvent was removed using a rotary evaporator to afford the title product, a compound of the present invention, as a tan solid (73.68 g).
¹H NMR (DMSO-d₆) δ 8.28 (d, 2H), 7.70 (br s, 2H), 7.58 (d, 2H).

To a solution of 6-amino-5-chloro-2-(4-chlorophenyl)-4-pyrimidinecarboxylic acid (i.e. the product of Example 4, Step C) (20.0 g, 70.4 mmol) in ethanol (70 mL) was added thionyl chloride (5.14 mL, 70.4 mmol) while maintaining the temperature below 15°C using an ice bath. The reaction mixture was then heated at reflux overnight. Water was added. Then with external cooling aqueous sodium hydroxide (50%) was added to adjust the pH to 7. The resulting solid was isolated by filtration and dried to afford the title product, a compound of the present invention, as a light beige solid (20.1 g).
¹H NMR (CDCl₃) δ 8.31 (d, 2H), 7.42 (d, 2H), 5.50 (br s, 2H), 4.50 (q, 2H), 1.47 (t, 3H).

By the procedures described herein together with methods known in the art, the following compounds of Tables 1 to 4 can be prepared. The following abbreviations are used in the Tables which follow: t means tertiary, i means iso, Me means methyl, Et means ethyl, Pr means propyl, i-Pr means isopropyl, Bu means butyl, t-Bu means tert-butyl, CN means cyano, and S(O)₂Me means methylsulfonyl. "⊖" means negative formal charge, and "⊕" means positive formal charge.

Compounds of this invention will generally be used as a formulation or composition with an agriculturally suitable carrier comprising at least one of a liquid diluent, a solid diluent or a surfactant. The formulation or composition ingredients are selected to be consistent with the physical properties of the active ingredient, mode of application and environmental factors such as soil type, moisture and temperature. Useful formulations include liquids such as solutions (including emulsifiable concentrates), suspensions, emulsions (including microemulsions and/or suspoemulsions) and the like which optionally can be thickened into gels. Useful formulations further include solids such as dusts, powders, granules, pellets, tablets, films (including seed coatings), and the like which can be water-dispersible ("wettable") or water-soluble. Active ingredient can be (micro)encapsulated and further formed into a suspension or solid formulation; alternatively the entire formulation of active ingredient can be encapsulated (or "overcoated"). Encapsulation can control or delay release of the active ingredient. Sprayable formulations can be extended in suitable media and used at spray volumes from about one to several hundred liters per hectare. High-strength compositions are primarily used as intermediates for further formulation.

The formulations will typically contain effective amounts of active ingredient, diluent and surfactant within the following approximate ranges which add up to 100 percent by weight.

Typical solid diluents are described in Watkins, et al., Handbook of Insecticide Dust Diluents and Carriers, 2nd Ed., Dorland Books, Caldwell, New Jersey. Typical liquid diluents are described in Marsden, Solvents Guide, 2nd Ed., Interscience, New York, 1950. McCutcheon's Detergents and Emulsifiers Annual, Allured Publ. Corp., Ridgewood, New Jersey, as well as Sisely and Wood, Encyclopedia of Surface Active Agents, Chemical Publ. Co., Inc., New York, 1964, list surfactants and recommended uses. All formulations can contain minor amounts of additives to reduce foam, caking, corrosion, microbiological growth and the like, or thickeners to increase viscosity.

Surfactants include, for example, polyethoxylated alcohols, polyethoxylated alkylphenols, polyethoxylated sorbitan fatty acid esters, dialkyl sulfosuccinates, alkyl sulfates, alkylbenzene sulfonates, organosilicones, N,N-dialkyltaurates, lignin sulfonates, naphthalene sulfonate formaldehyde condensates, polycarboxylates, glycerol esters, polyoxyethylene/polyoxypropylene block copolymers, and alkylpolyglycosides where the number of glucose units, referred to as degree of polymerization (D.P.), can range from 1 to 3 and the alkyl units can range from C₆ to C₁₄ (see Pure and Applied Chemistry 72, 1255-1264). Solid diluents include, for example, clays such as bentonite, montmorillonite, attapulgite and kaolin, starch, sugar, silica, talc, diatomaceous earth, urea, calcium carbonate, sodium carbonate and bicarbonate, and sodium sulfate. Liquid diluents include, for example, water, N,N-dimethylformamide, dimethyl sulfoxide, N-alkylpyrrolidone, ethylene glycol, polypropylene glycol, propylene carbonate, dibasic esters, paraffins, alkylbenzenes, alkylnaphthalenes, glycerine, triacetine, oils of olive, castor, linseed, tung, sesame, corn, peanut, cotton-seed, soybean, rape-seed and coconut, fatty acid esters, ketones such as cyclohexanone, 2-heptanone, isophorone and 4-hydroxy-4-methyl-2-pentanone, acetates such as hexyl acetate, heptyl acetate and octyl acetate, and alcohols such as methanol, cyclohexanol, decanol, benzyl and tetrahydrofurfuryl alcohol.

Useful formulations of this invention may also contain materials well known to those skilled in the art as formulation aids such as antifoams, film formers and dyes. Antifoams can include water dispersible liquids comprising polyorganosiloxanes like Rhodorsil® 416. The film formers can include polyvinyl acetates, polyvinyl acetate copolymers, polyvinylpyrrolidone-vinyl acetate copolymer, polyvinyl alcohols, polyvinyl alcohol copolymers and waxes. Dyes can include water dispersible liquid colorant compositions like Pro-Ized® Colorant Red. One skilled in the art will appreciate that this is a non-exhaustive list of formulation aids. Suitable examples of formulation aids include those listed herein and those listed in McCutcheon's 2001, Volume 2: Functional Materials published by MC Publishing Company and PCT Publication WO 03/024222WO03024222A.

Solutions, including emulsifiable concentrates, can be prepared by simply mixing the ingredients. Dusts and powders can be prepared by blending and, usually, grinding as in a hammer mill or fluid-energy mill. Suspensions are usually prepared by wet-milling; see, for example, U.S. 3,060,084US3060084A. Granules and pellets can be prepared by spraying the active material upon preformed granular carriers or by agglomeration techniques. See Browning, "Agglomeration", Chemical Engineering, December 4, 1967, pp 147-48, Perry's Chemical Engineer's Handbook, 4th Ed., McGraw-Hill, New York, 1963, pages 8-57 and following, and WO 91/13546WO9113546A. Pellets can be prepared as described in U.S. 4,172,714US4172714A. Water-dispersible and water-soluble granules can be prepared as taught in U.S. 4,144,050US4144050A, U.S. 3,920,442US3920442A and DE 3,246,493DE3246493. Tablets can be prepared as taught in U.S. 5,180,587US5180587A, U.S. 5,232,701US5232701A and U.S. 5,208,030US5208030A. Films can be prepared as taught in GB 2,095,558GB2095558A and U.S. 3,299,566US3299566A.

For further information regarding the art of formulation, see T. S. Woods, "The Formulator's Toolbox - Product Forms for Modem Agriculture" in Pesticide Chemistry and Bioscience, The Food-Environment Challenge, T. Brooks and T. R. Roberts, Eds., Proceedings of the 9th International Congress on Pesticide Chemistry, The Royal Society of Chemistry, Cambridge, 1999, pp. 120-133. See also U.S. 3,235,361US3235361A, Col. 6, line 16 through Col. 7, line 19 and Examples 10-41; U.S. 3,309,192US3309192A, 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; U.S. 2,891,855US2891855A, Col. 3, line 66 through Col. 5, line 17 and Examples 1-4; Klingman, Weed Control as a Science, John Wiley and Sons, Inc., New York, 1961, pp 81-96; Hance et al., Weed Control Handbook, 8th Ed., Blackwell Scientific Publications, Oxford, 1989; and Developments in formulation technology, PJB Publications, Richmond, UK, 2000.

In the following Examples, all percentages are by weight and all formulations are prepared in conventional ways. Compound numbers refer to compounds in Index Tables A-D.

Test results indicate that the compounds of the present invention are highly active preemergent and/or postemergent herbicides and/or plant growth regulants. Many of them have utility for broad-spectrum pre- and/or postemergence weed control in areas where complete control of all vegetation is desired such as around fuel storage tanks, industrial storage areas, parking lots, drive-in theaters, air fields, river banks, irrigation and other waterways, around billboards and highway and railroad structures. Many of the compounds of this invention, by virtue of selective metabolism in crops versus weeds, or by selective activity at the locus of physiological inhibition in crops and weeds, or by selective placement on or within the environment of a mixture of crops and weeds, are useful for the selective control of grass and broadleaf weeds within a crop/weed mixture. One skilled in the art will recognize that the preferred combination of these selectivity factors within a compound or group of compounds can readily be determined by performing routine biological and/or biochemical assays. Compounds of this invention may show tolerance to important agronomic crops including, but is not limited to, alfalfa, barley, cotton, wheat, rape, sugar beets, corn (maize), sorghum, soybeans, rice, oats, peanuts, vegetables, tomato, potato, perennial plantation crops including coffee, cocoa, oil palm, rubber, sugarcane, citrus, grapes, fruit trees, nut trees, banana, plantain, pineapple, hops, tea and forests such as eucalyptus and conifers (e.g., loblolly pine), and turf species (e.g., Kentucky bluegrass, St. Augustine grass, Kentucky fescue and Bermuda grass). Compounds of this invention can be used in crops genetically transformed or bred to incorporate resistance to herbicides, express proteins toxic to invertebrate pests (such as Bacillus thuringiensis toxin), and/or express other useful traits. Those skilled in the art will appreciate that not all compounds are equally effective against all weeds. Alternatively, the subject compounds are useful to modify plant growth.

As the compounds of the invention have both preemergent and postemergent herbicidal activity, to control undesired vegetation by killing or injuring the vegetation or reducing its growth, the compounds can be usefully applied by a variety of methods involving contacting a herbicidally effective amount of a compound of the invention, or a composition comprising said compound and at least one of a surfactant, a solid diluent or a liquid diluent, to the foliage or other part of the undesired vegetation or to the environment of the undesired vegetation such as the soil or water in which the undesired vegetation is growing or which surrounds the seed or other propagule of the undesired vegetation.

A herbicidally effective amount of the compounds of this invention is determined by a number of factors. These factors include: formulation selected, method of application, amount and type of vegetation present, growing conditions, etc. In general, a herbicidally effective amount of compounds of this invention is about 0.0001 to 20 kg/ha with a preferred range of about 0.001 to 5 kg/ha and a more preferred range of about 0.004 to 3 kg/ha. One skilled in the art can easily determine the herbicidally effective amount necessary for the desired level of weed control.

Compounds of this invention can be used alone or in combination with other herbicides, insecticides and fungicides, and other agricultural chemicals such as fertilizers. Mixtures of the compounds of the invention with other herbicides can broaden the spectrum of activity against additional weed species, and suppress the proliferation of any resistant biotypes. A mixture of one or more of the following herbicides with a compound of this invention may be particularly useful for weed control: acetochlor, acifluorfen and its sodium salt, aclonifen, acrolein (2-propenal), alachlor, alloxydim, ametryn, amicarbazone, amidosulfuron, aminopyralid, amitrole, ammonium sulfamate, anilofos, asulam, atrazine, azimsulfuron, beflubutamid, benazolin, benazolin-ethyl, benfluralin, benfuresate, bensulfuron-methyl, bensulide, bentazone, benzobicyclon, benzofenap, bifenox, bilanafos, bispyribac and its sodium salt, bromacil, bromobutide, bromofenoxim, bromoxynil, bromoxynil octanoate, butachlor, butafenacil, butamifos, butralin, butroxydim, butylate, cafenstrole, carbetamide, carfentrazone-ethyl, catechin, chlomethoxyfen, chloramben, chlorbromuron, chlorflurenol-methyl, chloridazon, chlorimuron-ethyl, chlorotoluron, chlorpropham, chlorsulfuron, chlorthal-dimethyl, chlorthiamid, cinidon-ethyl, cinmethylin, cinosulfuron, clefoxydim, clethodim, clodinafop-propargyl, clomazone, clomeprop, clopyralid, clopyralid-olamine, cloransulam-methyl, copper sulfate, CUH-35 (2-methoxyethyl 2-[[[4-chloro-2-fluoro-5-[(1-methyl-2-propynyl)oxy]phenyl](3-fluorobenzoyl)amino]carbonyl]-1-cyclohexene-1-carboxylate), cumyluron, cyanazine, cycloate, cyclosulfamuron, cycloxydim, cyhalofop-butyl, 2,4-D and its butotyl, butyl, isoctyl and isopropyl esters and its dimethylammonium, diolamine and trolamine salts, daimuron, dalapon, dalapon-sodium, dazomet, 2,4-DB and its dimethylammonium, potassium and sodium salts, desmedipham, desmetryn, dicamba and its diglycolammonium, dimethylammonium, potassium and sodium salts, dichlobenil, dichlorprop, diclofop-methyl, diclosulam, difenzoquat metilsulfate, diflufenican, diflufenzopyr, dimefuron, dimepiperate, dimethachlor, dimethametryn, dimethenamid, dimethenamid-P, dimethipin, dimethylarsinic acid and its sodium salt, dinitramine, dinoterb, diphenamid, diquat dibromide, dithiopyr, diuron, DNOC, endothal, epoprodan, EPTC, esprocarb, ethalfluralin, ethametsulfuron-methyl, ethofumesate, ethoxyfen, ethoxysulfuron, etobenzanid, fenoxaprop-ethyl, fenoxaprop-P-ethyl, fentrazamide, fenuron, fenuron-TCA, flamprop-methyl, flamprop-M-isopropyl, flamprop-M-methyl, flazasulfuron, florasulam, fluazifop-butyl, fluazifop-P-butyl, flucarbazone, flucarbazone-sodium, flucetosulfuron, fluchloralin, flufenacet, flufenpyr, flufenpyr-ethyl, flumetsulam, flumiclorac-pentyl, flumioxazin, fluometuron, fluoroglycofen-ethyl, flupyrsulfuron-methyl and its sodium salt, flurenol, flurenol-butyl, fluridone, flurochloridone, fluroxypyr, flurtamone, fluthiacet-methyl, fomesafen, foramsulfuron, fosamine-ammonium, glufosinate, glufosinate-ammonium, glyphosate and its salts such as ammonium, isopropylammonium, potassium, sodium (including sesquisodium) and trimesium (alternatively named sulfosate), halosulfuron-methyl, haloxyfop-etotyl, haloxyfop-methyl, hexazinone, HOK-201 (N-(2,4-difluorophenyl)-1,5-dihydro-N-(1-methylethyl)-5-oxo-1-[(tetrahydro-2H-pyran-2-yl)-methyl]-4H-1,2,4-triazole-4-carboxamide), imazamethabenz-methyl, imazamox, imazapic, imazapyr, imazaquin, imazaquin-ammonium, imazethapyr, imazethapyr-ammonium, imazosulfuron, indanofan, iodosulfuron-methyl, ioxynil, ioxynil octanoate, ioxynil-sodium, isoproturon, isouron, isoxaben, isoxaflutole, isoxachlortole; isoxadifen, KUH-021 (N-[2-[(4,6-dimethoxy-2-pyrimidinyl)hydroxymethyl]-6-(methoxymethyl)phenyl]-1,1-difluoromethanesulfonamide), lactofen, lenacil, linuron, maleic hydrazide, MCPA and its salts (e.g., MCPA-dimethylammonium, MCPA-potassium and MCPA-sodium), esters (e.g., MCPA-2-ethylhexyl, MCPA-butotyl) and thioesters (e.g., MCPA-thioethyl), MCPB and its salts (e.g., MCPB-sodium) and esters (e.g., MCPB-ethyl), mecoprop, mecoprop-P, mefenacet, mefluidide, mesosulfuron-methyl, mesotrione, metam-sodium, metamifop, metamitron, metazachlor, methabenzthiazuron, methylarsonic acid and its calcium, monoammonium, monosodium and disodium salts, methyldymron, metobenzuron, metobromuron, metolachlor, S-metholachlor, metosulam, metoxuron, metribuzin, metsulfuron-methyl, molinate, monolinuron, naproanilide, napropamide, naptalam, neburon, nicosulfuron, norflurazon, orbencarb, oryzalin, oxadiargyl, oxadiazon, oxasulfuron, oxaziclomefone, oxyfluorfen, paraquat dichloride, pebulate, pelargonic acid, pendimethalin, penoxsulam, pentanochlor, pentoxazone, perfluidone, pethoxyamid, phenmedipham, picloram, picloram-potassium, picolinafen, pinoxaden, piperofos, pretilachlor, primisulfuron-methyl, prodiamine, profoxydim, prometon, prometryn, propachlor, propanil, propaquizafop, propazine, propham, propisochlor, propoxycarbazone, propoxycarbazone-sodium propyzamide, prosulfocarb, prosulfuron, pyraclonil, pyraflufen-ethyl, pyrazogyl, pyrazolate, pyrazolynate, pyrazoxyfen, pyrazosulfuron-ethyl, pyribenzoxim, pyributicarb, pyridate, pyriftalid, pyriminobac-methyl, pyrithiobac, pyrithiobac-sodium, quinclorac, quinmerac, quinoclamine, quizalofop-ethyl, quizalofop-P-ethyl, quizalofop-P-tefuryl, rimsulfuron, sethoxydim, siduron, simazine, simetryn, sulcotrione, sulfentrazone, sulfometuron-methyl, sulfosulfuron, 2,3,6-TBA, TCA, TCA-sodium, tebutam, tebuthiuron, tepraloxydim, terbacil, terbumeton, terbuthylazine, terbutryn, thenylchlor, thiazopyr, thifensulfuron-methyl, thiobencarb, tiocarbazil, tralkoxydim, tri-allate, triasulfuron, triaziflam, tribenuron-methyl, triclopyr, triclopyr-butotyl, triclopyr-triethylammonium, tridiphane, trietazine, trifloxysulfuron, trifluralin, triflusulfuron-methyl, tritosulfuron and vernolate. Other herbicides also include bioherbicides such as Alternaria destruens Simmons, Colletotrichum gloeosporiodes (Penz.) Penz. & Sacc., Drechsiera monoceras (MTB-951), Myrothecium verrucaria (Albertini & Schweinitz) Ditmar: Fries, Phytophthora palmivora (Butl.) Butl. and Puccinia thlaspeos Schub. Combinations of compounds of the invention with other herbicides can result in a greater-than-additive (i.e. synergistic) effect on weeds and/or a less-than-additive: effect (i.e. safening) on crops or other desirable plants. In certain instances, combinations with other herbicides having a similar spectrum of control but a different mode of action will be particularly advantageous for preventing the development of resistant weeds. Herbicidally effective amounts of compounds of the invention as well as herbicidally effective amounts of other herbicides can be easily determined by one skilled in the art through simple experimentation.

Preferred for better control of undesired vegetation (e.g., lower use rate, broader spectrum of weeds controlled, or enhanced crop safety) or for preventing the development of resistant weeds are mixtures of a compound of this invention with a herbicide selected from the group consisting of diuron, hexazinone, terbacil, bromacil, glyphosate (particularly glyphosate-isopropylammonium, glyphosate-sodium, glyphosate-potassium, glyphosate-trimesium), glufosinate (particularly glufosinate-ammonium), azimsulfuron, chlorsulfuron, ethametsulfuron-methyl, chlorimuron-ethyl, bensulfuron-methyl, rimsulfuron, sulfometuron-methyl, metsulfuron-methyl, nicosulfuron, tribenuron-methyl, thifensulfuron-methyl, flupyrsulfuron-methyl, flupyrsulfuron-methyl-sodium, halosulfuron-methyl, primisulfuron-methyl, trifloxysulfuron, foramsulfuron, mesosulfuron-methyl, iodosulfuron-methyl, isoproturon, ametryn, amitrole, paraquat dichloride, diquat dibromide, atrazine, metribuzin, acetochlor, metolachlor, S-metolachlor, alachlor, pretilachlor, sethoxydim, tralkoxydim, clethodim, cyhalofop-butyl, quizalofop-ethyl, diclofop-methyl, clodinafop-propargyl, fenoxaprop-ethyl, dimethenamid, flufenacet, picloram, prodiamine, fosamine-ammonium, 2,4-D, 2,4-DB, dicamba, penoxsulam, flumetsulam, naptalam, pendimethalin, oryzalin, MCPA (and its dimethylammonium, potassium and sodium salts), MCPA-isoctyl, MCPA-thioethyl, mecoprop, clopyralid, aminopyralid, triclopyr, fluroxypyr, diflufenzopyr, imazapyr, imazethapyr, imazamox, picolinafen, oxyfluorfen, oxadiazon, carfentrazone-ethyl, sulfentrazone, flumioxazin, diflufenican, bromoxynil, propanil, thiobencarb, molinate, fluridone, mesotrione, sulcotrione, isoxaflutole, isoxaben, clomazone, anilofos, beflubutamid, benfuresate, bentazone, benzobicyclon, benzofenap, bromobutide, butachlor, butamifos, cafenstrole, clomeprop, dimepiperate, dimethametryn, daimuron, esprocarb, etobenzanide, fentrazamid, indanofan, cumyluron, mefenacet, oxaziclomefone, oxadiargyl, pentoxazone, pyraclonil, pyrazolate, pyributicarb, pyriftalid, pyriminobac-methyl, thenylehlor, bispyribac-sodium, clefoxydim, copper sulfate, cinosulfuron, cyclosulfamuron, ethoxysulfuron, epoprodan, flucetosulfuron, imazosulfuron, metamifop, pyrazosulfuron-ethyl, quinclorac, flucarbazone-sodium, propoxycarbazone-sodium, amicarbazone, florasulam, triasulfuron, triaziflam, pinoxaden, tritosulfuron, amidosulfuron, metosulam, sulfosulfuron, pyraflufen-ethyl, HOK-201, KUH-021 and CUH-35. Specifically preferred mixtures (compound numbers refer to compounds in Index Tables A-D) are selected from the group: compound 4 and diuron; compound 9 and diuron; compound 58 and diuron; compound 64 and diuron; compound 65 (and salts thereof) and diuron; compound 94 and diuron; compound 95 (and salts thereof) and diuron; compound 96 and diuron; compound 135 (and salts thereof) and diuron; compound 4 and hexazinone; compound 9 and hexazinone; compound 58 and hexazinone; compound 64 and hexazinone; compound 65 (and salts thereof) and hexazinone; compound 94 and hexazinone; compound 95 (and salts thereof) and hexazinone; compound 96 and hexazinone; compound 135 (and salts thereof) and hexazinone; compound 4 and terbacil; compound 9 and terbacil; compound 58 and terbacil; compound 64 and terbacil; compound 65 (and salts thereof) and terbacil; compound 94 and terbacil; compound 95 (and salts thereof) and terbacil; compound 96 and terbacil; compound 135 (and salts thereof) and terbacil; compound 4 and bromacil; compound 9 and bromacil; compound 58 and bromacil; compound 64 and bromacil; compound 65 (and salts thereof) and bromacil; compound 94 and bromacil; compound 95 (and salts thereof) and bromacil; compound 96 and bromacil; compound 135 (and salts thereof) and bromacil; compound 4 and glyphosate; compound 9 and glyphosate; compound 58 and glyphosate; compound 64 and glyphosate; compound 65 (and salts thereof) and glyphosate; compound 94 and glyphosate; compound 95 (and salts thereof) and glyphosate; compound 96 and glyphosate; compound 135 (and salts thereof) and glyphosate; compound 4 and glufosinate; compound 9 and glufosinate; compound 58 and glufosinate; compound 64 and glufosinate; compound 65 (and salts thereof) and glufosinate; compound 94 any glufosinate; compound 95 (and salts thereof) and glufosinate; compound 96 and glufosinate; compound 135 (and salts thereof) and glufosinate; compound 4 and azimsulfuron; compound 9 and azimsulfuron; compound 58 and azimsulfuron; compound 64 and azimsulfuron; compound 65 (and salts thereof) and azimsulfuron; compound 94 and azimsulfuron; compound 95 (and salts thereof) and azimsulfuron; compound 96 and azimsulfuron; compound 135 (and salts thereof) and azimsulfuron; compound 4 and chlorsulfuron; compound 9 and chlorsulfuron; compound 58 and chlorsulfuron; compound 64 and chlorsulfuron; compound 65 (and salts thereof) and chlorsulfuron; compound 94 and chlorsulfuron; compound 95 (and salts thereof) and chlorsulfuron; compound 96 and chlorsulfuron; compound 135 (and salts thereof) and chlorsulfuron; compound 4 and ethametsufuron-methyl; compound 9 and ethametsufuron-methyl; compound 58 and ethametsufuron-methyl; compound 64 and ethametsufuron-methyl; compound 65 (and salts thereof) and ethametsufuron-methyl; compound 94 and ethametsufuron-methyl; compound 95 (and salts thereof) and ethametsufuron-methyl; compound 96 and ethametsufuron-methyl; compound 135 (and salts thereof) and ethametsufuron-methyl; compound 4 and chlorimuron-ethyl; compound 9 and chlorimuronethyl; compound 58 and chlorimuron-ethyl, compound 94 and chlorimuron-ethyl; compound 65 (and salts thereof) and chlorimuron-ethyl; compound 94 and chlorimuron-ethyl; compound 95 (and salts thereof) and chlorimuron-ethyl; compound 96 and chlorimuron-ethyl; compound 135 (and salts thereof) and chlorimuron-ethyl; compound 4 and bensulfuron-methyl; compound 9 and bensulfuron-methyl; compound 58 and bensulfuron-methyl; compound 64 and bensulfuron-methyl; compound 65 (and salts thereof) and bensulfuron-methyl; compound 94 and bensulfuron-methyl; compound 95 (and salts thereof) and bensulfuron-methyl; compound 96 and bensulfuron-methyl; compound 135 (and salts thereof) and bensulfuron-methyl; compound 4 and rimsulfuron; compound 9 and rimsulfuron; compound 58 and rimsulfuron; compound 64 and rimsulfuron; compound 65 (and salts thereof) and rimsulfuron; compound 94 and rimsulfuron; compound 95 (and salts thereof) and rimsulfuron; compound 96 and rimsulfuron; compound 135 (and salts thereof) and rimsulfuron; compound 4 and sulfometuron-methyl; compound 9 and sulfometuron-methyl; compound 58 and sulfometuron-methyl; compound 64 and sulfometuron-methyl; compound 65 (and salts thereof) and sulfometuron-methyl; compound 94 and sulfometuron-methyl; compound 95 (and salts thereof) and sulfometuron-methyl; compound 96 and sulfometuron-methyl; compound 135 (and salts thereof) and sulfometuron-methyl; compound 4 and metsulfuron-methyl; compound 9 and metsulfuron-methyl; compound 58 and metsulfuron-methyl; compound 64 and metsulfuron-methyl; compound 65 (and salts thereof) and metsulfuron-methyl; compound 94 and metsulfuron-methyl; compound 95 (and salts thereof) and metsulfuron-methyl; compound 96 and metsulfuron-methyl; compound 135 (and salts thereof) and metsulfuron-methyl; compound 4 and nicosulfuron; compound 9 and nicosulfuron; compound 58 and nicosulfuron; compound 64 and nicosulfuron; compound 65 (and salts thereof) and nicosulfuron; compound 94 and nicosulfuron; compound 95 (and salts thereof) and nicosulfuron; compound 96 and nicosulfuron; compound 135 (and salts thereof) and nicosulfuron; compound 4 and tribenuron-methyl; compound 9 and tribenuron-methyl; compound 58 and tribenuron-methyl; compound 64 and tribenuron-methyl; compound 65 (and salts thereof) and tribenuron-methyl; compound 94 and tribenuron-methyl; compound 95 (and salts thereof) and tribenuron-methyl; compound 96 and tribenuron-methyl; compound 135 (and salts thereof) and tribenuron-methyl; compound 4 and thifensulfuron-methyl; compound 9 and thifensulfuron-methyl; compound 58 and thifensulfuron-methyl; compound 64 and thifensulfuron-methyl; compound 65 (and salts thereof) and thifensulfuron-methyl; compound 94 and thifensulfuron-methyl; compound 95 (and salts thereof) and thifensulfuron-methyl; compound 96 and thifensulfuron-methyl; compound 135 (and salts thereof) and thifensulfuron-methyl; compound 4 and flupyrsulfuron-methyl; compound 9 and flupyrsulfuron-methyl; compound 58 and flupyrsulfuron-methyl; compound 64 and flupyrsulfuron-methyl; compound 65 (and salts thereof) and flupyrsulfuron-methyl; compound 94 and flupyrsulfuron-methyl; compound 95 (and salts thereof) and flupyrsulfuron-methyl; compound 96 and flupyrsulfuron-methyl; compound 135 (and salts thereof) and flupyrsulfuron-methyl; compound 4 and flupyrsulfuron-methyl-sodium; compound 9 and flupyrsulfuron-methyl-sodium; compound 58 and flupyrsulfuron-methyl-sodium; compound 64 and flupyrsulfuron-methyl-sodium; compound 65 (and salts thereof) and flupyrsulfuron-methyl-sodium; compound 94 and flupyrsulfuron-methyl-sodium; compound 95 (and salts thereof) and flupyrsulfuron-methyl-sodium; compound 96 and flupyrsulfuron-methyl-sodium; compound 135 (and salts thereof) and flupyrsulfuron-methyl-sodium; compound 4 and halosulfuron-methyl; compound 9 and halosulfuron-methyl; compound 58 and halosulfuron-methyl; compound 64 and halosulfuron-methyl; compound 65 (and salts thereof) and halosulfuron-methyl; compound 94 and halosulfuron-methyl; compound 95 (and salts thereof) and halosulfuron-methyl; compound 96 and halosulfuron-methyl; compound 135 (and salts thereof) and halosulfuron-methyl; compound 4 and primisulfuron-methyl; compound 9 and primisulfuron-methyl; compound 58 and primisulfuron-methyl; compound 64 and primisulfuron-methyl; compound 65 (and salts thereof) and primisulfuron-methyl; compound 94 and primisulfuron-methyl; compound 95 (and salts thereof) and primisulfuron-methyl; compound 96 and primisulfuron-methyl; compound 135 (and salts thereof) and primisulfuron-methyl; compound 4 and trifloxysulfuron; compound 9 and trifloxysulfuron; compound 58 and trifloxysulfuron; compound 64 and trifloxysulfuron; compound 65 (and salts thereof) and trifloxysulfuron; compound 94 and trifloxysulfuron; compound 95 (and salts thereof) and trifloxysulfuron; compound 96 and trifloxysulfuron; compound 135 (and salts thereof) and trifloxysulfuron; compound 4 and foramsulfuron; compound 9 and foramsulfuron; compound 58 and foramsulfuron; compound 64 and foramsulfuron; compound 65 (and salts thereof) and foramsulfuron; compound 94 and foramsulfuron; compound 95 (and salts thereof) and foramsulfuron; compound 96 and foramsulfuron; compound 135 (and salts thereof) and foramsulfuron; compound 4 and mesosulfuron-methyl; compound 9 and mesosulfuron-methyl; compound 58 and mesosulfuron-methyl; compound 64 and mesosulfuron-methyl; compound 65 (and salts thereof) and mesosulfuron-methyl; compound 94 and mesosulfuron-methyl; compound 95 (and salts thereof) and mesosulfuron-methyl; compound 96 and mesosulfuron-methyl; compound 135 (and salts thereof) and mesosulfuron-methyl; compound 4 and iodosulfuron-methyl; compound 9 and iodosulfuron-methyl; compound 58 and iodosulfuron-methyl; compound 64 and iodosulfuron-methyl; compound 65 (and salts thereof) and iodosulfuron-methyl; compound 94 and iodosulfuron-methyl; compound 95 (and salts thereof) and iodosulfuron-methyl; compound 96 and iodosulfuron-methyl; compound 135 (and salts thereof) and iodosulfuron-methyl; compound 4 and isoproturon; compound 9 and isoproturon; compound 58 and isoproturon; compound 64 and isoproturon; compound 65 (and salts thereof) and isoproturon; compound 94 and isoproturon; compound 95 (and salts thereof) and isoproturon; compound 96 and isoproturon; compound 135 (and salts thereof) and isoproturon; compound 4 and ametryn; compound 9 and ametryn; compound 58 and ametryn; compound 64 and ametryn; compound 65 (and salts thereof) and ametryn; compound 94 and ametryn; compound 95 (and salts thereof) and ametryn; compound 96 and ametryn; compound 135 (and salts thereof) and ametryn; compound 4 and amitrole; compound 9 and amitrole; compound 58 and amitrole; compound 64 and amitrole; compound 65 (and salts thereof) and amitrole; compound 94 and amitrole; compound 95 (and salts thereof) and amitrole; compound 96 and amitrole; compound 135 (and salts thereof) and amitrole; compound 4 and paraquat dichloride; compound 9 and paraquat dichloride; compound 58 and paraquat dichloride; compound 64 and paraquat dichloride; compound 65 (and salts thereof) and paraquat dichloride; compound 94 and paraquat dichloride; compound 95 (and salts thereof) and paraquat dichloride; compound 96 and paraquat dichloride; compound 135 (and salts thereof) and paraquat dichloride; compound 4 and diquat dibromide; compound 9 and diquat dibromide; compound 58 and diquat dibromide; compound 64 and diquat dibromide; compound 65 (and salts thereof) and diquat dibromide; compound 94 and diquat dibromide; compound 95 (and salts thereof) and diquat dibromide; compound 96 and diquat dibromide; compound 135 (and salts thereof) and diquat dibromide; compound 4 and atrazine; compound 9 and atrazine; compound 58 and atrazine; compound 64 and atrazine; compound 65 (and salts thereof) and atrazine; compound 94 and atrazine; compound 95 (and salts thereof) and atrazine; compound 96 and atrazine; compound 135 (and salts thereof) and atrazine; compound 4 and metribuzin; compound 9 and metribuzin; compound 58 and metribuzin; compound 64 and metribuzin; compound 65 (and salts thereof) and metribuzin; compound 94 and metribuzin; compound 95 (and salts thereof) and metribuzin; compound 96 and metribuzin; compound 135 (and salts thereof) and metribuzin; compound 4 and acetochlor; compound 9 and acetochlor; compound 58 and acetochlor; compound 64 and acetochlor; compound 65 (and salts thereof) and acetochlor; compound 94 and acetochlor, compound 95 (and salts thereof) and acetochlor, compound 96 and acetochlor, compound 135 (and salts thereof) and acetochlor; compound 4 and metolachlor; compound 9 and metolachlor, compound 58 and metolachlor, compound 64 and metolachlor; compound 65 (and salts thereof) and metolachlor, compound 94 and metolachlor, compound 95 (and salts thereof) and metolachlor; compound 96 and metolachlor; compound 135 (and salts thereof) and metolachlor; compound 4 and S-metolachlor, compound 9 and S-metolachlor; compound 58 and S-metolachlor; compound 64 and S-metolachlor, compound 65 (and salts thereof) and S-metolachlor; compound 94 and S-metolachlor; compound 95 (and salts thereof) and S-metolachlor; compound 96 and S-metolachlor; compound 135 (and salts thereof) and S-metolachlor; compound 4 and alachlor; compound 9 and alachlor, compound 58 and alachlor; compound 64 and alachlor; compound 65 (and salts thereof) and alachlor; compound 94 and alachlor, compound 95 (and salts thereof) and alachlor; compound 96 and alachlor; compound 135 (and salts thereof) and alachlor; compound 4 and pretilachlor; compound 9 and pretilachlor; compound 58 and pretilachlor; compound 64 and pretilachlor; compound 65 (and salts thereof) and pretilachlor; compound 94 and pretilachlor; compound 95 (and salts thereof) and pretilachlor; compound 96 and pretilachlor; compound 135 (and salts thereof) and pretilachlor; compound 4 and sethoxydim; compound 9 and sethoxydim; compound 58 and sethoxydim; compound 64 and sethoxydim; compound 65 (and salts thereof) and sethoxydim; compound 94 and sethoxydim; compound 95 (and salts thereof) and sethoxydim; compound 96 and sethoxydim; compound 135 (and salts thereof) and sethoxydim; compound 4 and tralkoxydim; compound 9 and tralkoxydim; compound 58 and tralkoxydim; compound 64 and tralkoxydim; compound 65 (and salts thereof) and tralkoxydim; compound 94 and tralkoxydim; compound 95 (and salts thereof) and tralkoxydim; compound 96 and tralkoxydim; compound 135 (and salts thereof) and tralkoxydim; compound 4 and clethodim; compound 9 and clethodim; compound 58 and clethodim; compound 64 and clethodim; compound 65 (and salts thereof) and clethodim; compound 94 and clethodim; compound 95 (and salts thereof) and clethodim; compound 96 and clethodim; compound 135 (and salts thereof) and clethodim; compound 4 and cyhalofop-butyl; compound 9 and cyhalofop-butyl; compound 58 and cyhalofop-butyl; compound 64 and cyhalofop-butyl; compound 65 (and salts thereof) and cyhalofop-butyl; compound 94 and cyhalofop-butyl; compound 95 (and salts thereof) and cyhalofop-butyl; compound 96 and cyhalofop-butyl; compound 135 (and salts thereof) and cyhalofop-butyl; compound 4 and quizalofop-ethyl; compound 9 and quizalofop-ethyl; compound 58 and quizalofop-ethyl; compound 64 and quizalofop-ethyl; compound 65 (and salts thereof) and quizalofop-ethyl; compound 94 and quizalofop-ethyl; compound 95 (and salts thereof) and quizalofop-ethyl; compound 96 and quizalofop-ethyl; compound 135 (and salts thereof) and quizalofop-ethyl; compound 4 and diclofop-methyl; compound 9 and diclofop-methyl; compound 58 and diclofop-methyl; compound 64 and diclofop-methyl; compound 65 (and salts thereof) and diclofop-methyl; compound 94 and diclofop-methyl; compound 95 (and salts thereof) and diclofop-methyl; compound 96 and diclofop-methyl; compound 135 (and salts thereof) and diclofop-methyl; compound 4 and clodinafop-propargyl; compound 9 and clodinafop-propargyl; compound 58 and clodinafop-propargyl; compound 64 and clodinafop-propargyl; compound 65 (and salts thereof) and clodinafop-propargyl; compound 94 and clodinafop-propargyl; compound 95 (and salts thereof) and clodinafop-propargyl; compound 96 and clodinafop-propargyl; compound 135 (and salts thereof) and clodinafop-propargyl; compound 4 and fenoxaprop-ethyl; compound 9 and fenoxaprop-ethyl; compound 58 and fenoxaprop-ethyl; compound 64 and fenoxaprop-ethyl; compound 65 (and salts thereof) and fenoxaprop-ethyl; compound 94 and fenoxaprop-ethyl; compound 95 (and salts thereof) and fenoxaprop-ethyl; compound 96 and fenoxaprop-ethyl; compound 135 (and salts thereof) and fenoxaprop ethyl; compound 4 and dimethenamid; compound 9 and dimethenamid; compound 58 and dimethenamid; compound 64 and dimethenamid; compound 65 (and salts thereof) and dimethenamid; compound 94 and dimethenamid; compound 95 (and salts thereof) and dimethenamid; compound 96 and dimethenamid; compound 135 (and salts thereof) and dimethenamid; compound 4 and flufenacet; compound 9 and flufenacet; compound 58 and flufenacet; compound 64 and flufenacet; compound 65 (and salts thereof) and flufenacet; compound 94 and flufenacet; compound 95 (and salts thereof) and flufenacet; compound 96 and flufenacet; compound 135 (and salts thereof) and flufenacet; compound 4 and picloram; compound 9 and picloram; compound 58 and picloram; compound 64 and picloram; compound 65 (and salts thereof) and picloram; compound 94 and picloram; compound 95 (and salts thereof) and picloram; compound 96 and picloram; compound 135 (and salts thereof) and picloram; compound 4 and prodiamine; compound 9 and prodiamine; compound 58 and prodiamine; compound 64 and prodiamine; compound 65 (and salts thereof) and prodiamine; compound 94 and prodiamine; compound 95 (and salts thereof) and prodiamine; compound 96 and prodiamine; compound 135 (and salts thereof) and prodiamine; compound 4 and fosamine-ammonium; compound 9 and fosamine-ammonium; compound 58 and fosamine-ammonium; compound 64 and fosamine-ammonium; compound 65 (and salts thereof) and fosamine-ammonium; compound 94 and fosamine-ammonium; compound 95 (and salts thereof) and fosamine-ammonium; compound 96 and fosamine-ammonium; compound 135 (and salts thereof) and fosamine-ammonium; compound 4 and 2,4-D; compound 9 and 2,4-D; compound 58 and 2,4-D; compound 64 and 2,4-D; compound 65 (and salts thereof) and 2,4-D; compound 94 and 2,4-D; compound 95 (and salts thereof) and 2,4-D; compound 96 and 2,4-D; compound 135 (and salts thereof) and 2,4-D; compound 4 and 2,4-DB; compound 9 and 2,4-DB; compound 58 and 2,4-DB; compound 64 and 2,4-DB; compound 65 (and salts thereof) and 2,4-DB; compound 94 and 2,4-DB; compound 95 (and salts thereof) and 2,4-DB; compound 96 and 2,4-DB; compound 135 (and salts thereof) and 2,4-DB; compound 4 and dicamba; compound 9 and dicamba; compound 58 and dicamba; compound 64 and dicamba; compound 65 (and salts thereof) and dicamba; compound 94 and dicamba; compound 95 (and salts thereof) and dicamba; compound 96 and dicamba; compound 135 (and salts thereof) and dicamba; compound 4 and penoxsulam; compound 9 and penoxsulam; compound 58 and penoxsulam; compound 64 and penoxsulam; compound 65 (and salts thereof) and penoxsulam; compound 94 and penoxsulam; compound 95 (and salts thereof) and penoxsulam; compound 96 and penoxsulam; compound 135 (and salts thereof) and penoxsulam; compound 4 and flumetsulam; compound 9 and flumetsulam; compound 58 and flumetsulam; compound 64 and flumetsulam; compound 65 (and salts thereof) and flumetsulam; compound 94 and flumetsulam; compound 95 (and salts thereof) and flumetsulam; compound 96 and flumetsulam; compound 135 (and salts thereof) and flumetsulam; compound 4 and naptalam; compound 9 and naptalam; compound 58 and naptalam; compound 64 and naptalam; compound 65 (and salts thereof) and naptalam; compound 94 and naptalam; compound 95 (and salts thereof) and naptalam; compound 96 and naptalam; compound 135 (and salts thereof) and naptalam; compound 4 and pendimethalin; compound 9 and pendimethalin; compound 58 and pendimethalin; compound 64 and pendimethalin; compound 65 (and salts thereof) and pendimethalin; compound 94 and pendimethalin; compound 95 (and salts thereof) and pendimethalin; compound 96 and pendimethalin; compound 135 (and salts thereof) and pendimethalin; compound 4 and oryzalin; compound 9 and oryzalin; compound 58 and oryzalin; compound 64 and oryzalin; compound 65 (and salts thereof) and oryzalin; compound 94 and oryzalin; compound 95 (and salts thereof) and oryzalin; compound 96 and oryzalin; compound 135 (and salts thereof) and oryzalin; compound 4 and MCPA (and salts and (thio)esters thereof); compound 9 and MCPA (and salts and (thio)esters thereof); compound 58 and MCPA (and salts and (thio)esters thereof); compound 64 and MCPA (and salts and (thio)esters thereof); compound 65 (and salts thereof) and MCPA.(and salts and (thio)esters thereof); compound 94 and MCPA (and salts and (thio)esters thereof); compound 95 (and salts thereof) and MCPA (and salts and (thio)esters thereof); compound 96 and MCPA (and salts and (thio)esters thereof); compound 135 (and salts thereof) and MCPA (and salts and (thio)esters thereof); compound 4 and mecoprop; compound 9 and mecoprop; compound 58 and mecoprop; compound 64 and mecoprop; compound 65 (and salts thereof) and mecoprop; compound 94 and mecoprop; compound 95 (and salts thereof) and mecoprop; compound 96 and mecoprop; compound 135 (and salts thereof) and mecoprop; compound 4 and clopyralid; compound 9 and clopyralid; compound 58 and clopyralid; compound 64 and clopyralid; compound 65 (and salts thereof) and clopyralid; compound 94 and clopyralid; compound 95 (and salts thereof) and clopyralid; compound 96 and clopyralid; compound 135 (and salts thereof) and clopyralid; compound 4 and aminopyralid; compound 9 and aminopyralid; compound 58 and aminopyralid; compound 64 and aminopyralid; compound 65 (and salts thereof) and aminopyralid; compound 94 and aminopyralid; compound 95 (and salts thereof) and aminopyralid; compound 96 and aminopyralid; compound 135 (and salts thereof) and aminopyralid; compound 4 and triclopyr, compound 9 and triclopyr, compound 58 and triclopyr; compound 64 and triclopyr; compound 65 (and salts thereof) and triclopyr; compound 94 and triclopyr; compound 95 (and salts thereof) and triclopyr; compound 96 and triclopyr; compound 135 (and salts thereof) and triclopyr; compound 4 and fluroxypyr, compound 9 and fluroxypyr; compound 58 and fluroxypyr; compound 64 and fluroxypyr; compound 65 (and salts thereof) and fluroxypyr; compound 94 and fluroxypyr; compound 95 (and salts thereof) and fluroxypyr; compound 96 and fluroxypyr; compound 135 (and salts thereof) and fluroxypyr; compound 4 and diflufenzopyr; compound 9 and diflufenzopyr; compound 58 and diflufenzopyr; compound 64 and diflufenzopyr; compound 65 (and salts thereof) and diflufenzopyr; compound 94 and diflufenzopyr; compound 95 (and salts thereof) and diflufenzopyr; compound 96 and diflufenzopyr; compound 135 (and salts thereof) and diflufenzopyr; compound 4 and imazapyr; compound 9 and imazapyr; compound 58 and imazapyr; compound 64 and imazapyr; compound 65 (and salts thereof) and imazapyr; compound 94 and imazapyr; compound 95 (and salts thereof) and imazapyr; compound 96 and imazapyr; compound 135 (and salts thereof) and imazapyr; compound 4 and imazethapyr; compound 9 and imazethapyr; compound 58 and imazethapyr; compound 64 and imazethapyr; compound 65 (and salts thereof) and imazethapyr; compound 94 and imazethapyr; compound 95 (and salts thereof) and imazethapyr; compound 96 and imazethapyr; compound 135 (and salts thereof) and imazethapyr; compound 4 and imazamox; compound 9 and imazamox; compound 58 and imazamox; compound 64 and imazamox; compound 65 (and salts thereof) and imazamox; compound 94 and imazamox; compound 95 (and salts thereof) and imazamox; compound 96 and imazamox; compound 135 (and salts thereof) and imazamox; compound 4 and picolinafen; compound 9 and picolinafen; compound 58 and picolinafen; compound 64 and picolinafen; compound 65.(and salts thereof) and picolinafen; compound 94 and picolinafen; compound 95 (and salts thereof) and picolinafen; compound 96 and picolinafen; compound 135 (and salts thereof) and picolinafen; compound 4 and oxyfluorfen; compound 9 and oxyfluorfen; compound 58 and oxyfluorfen; compound 64 and oxyfluorfen; compound 65 (and salts thereof) and oxyfluorfen; compound 94 and oxyfluorfen; compound 95 (and salts thereof) and oxyfluorfen; compound 96 and oxyfluorfen; compound 135 (and salts thereof) and oxyfluorfen; compound 4 and oxadiazon; compound 9 and oxadiazon; compound 58 and oxadiazon; compound 64 and oxadiazon; compound 65 (and salts thereof) and oxadiazon; compound 94 and oxadiazon; compound 95 (and salts thereof) and oxadiazon; compound 96 and oxadiazon; compound 135 (and salts thereof) and oxadiazon; compound 4 and carfentrazone-ethyl; compound 9 and carfentrazone-ethyl; compound 58 and carfentrazone-ethyl; compound 64 and carfentrazone-ethyl; compound 65 (and salts thereof) and carfentrazone-ethyl; compound 94 and carfentrazone-ethyl; compound 95 (and salts thereof) and carfentrazone-ethyl; compound 96 and carfentrazone-ethyl; compound 135 (and salts thereof) and carfentrazone-ethyl; compound 4 and sulfentrazone; compound 9 and sulfentrazone; compound 58 and sulfentrazone; compound 64 and sulfentrazone; compound 65 (and salts thereof) and sulfentrazone; compound 94 and sulfentrazone; compound 95 (and salts thereof) and sulfentrazone; compound 96 and sulfentrazone; compound 135 (and salts thereof) and sulfentrazone; compound 4 and flumioxazin; compound 9 and flumioxazin; compound 58 and flumioxazin; compound 64 and flumioxazin; compound 65 (and salts thereof) and flumioxazin; compound 94 and flumioxazin; compound 95 (and salts thereof) and flumioxazin; compound 96 and flumioxazin; compound 135 (and salts thereof) and flumioxazin; compound 4 and diflufenican; compound 9 and diflufenican; compound 58 and diflufenican; compound 64 and diflufenican; compound 65 (and salts thereof) and diflufenican; compound 94 and diflufenican; compound 95 (and salts thereof) and diflufenican; compound 96 and diflufenican; compound 135 (and salts thereof) and diflufenican; compound 4 and bromoxynil; compound 9 and bromoxynil; compound 58 and bromoxynil; compound 64 and bromoxynil; compound 65 (and salts thereof) and bromoxynil; compound 94 and bromoxynil; compound 95 (and salts thereof) and bromoxynil; compound 96 and bromoxynil; compound 135 (and salts thereof) and bromoxynil; compound 4 and propanil; compound 9 and propanil; compound 58 and propanil; compound 64 and propanil; compound 65 (and salts thereof) and propanil; compound 94 and propanil; compound 95 (and salts thereof) and propanil; compound 96 and propanil; compound 135 (and salts thereof) and propanil; compound 4 and thiobencarb; compound 9 and thiobencarb; compound 58 and thiobencarb; compound 64 and thiobencarb; compound 65 (and salts thereof) and thiobencarb; compound 94 and thiobencarb; compound 95 (and salts thereof) and thiobencarb; compound 96 and thiobencarb; compound 135 (and salts thereof) and thiobencarb; compound 4 and fluridone; compound 9 and fluridone; compound 58 and fluridone; compound 64 and fluridone; compound 65 (and salts thereof) and fluridone; compound 94 and fluridone; compound 95 (and salts thereof) and fluridone; compound 96 and fluridone; compound 135 (and salts thereof) and fluridone; compound 4 and mesotrione; compound 9 and mesotrione; compound 58 and mesotrione; compound 64 and mesotrione; compound 65 (and salts thereof) and mesotrione; compound 94 and mesotrione; compound 95 (and salts thereof) and mesotrione; compound 96 and mesotrione; compound 135 (and salts thereof) and mesotrione; compound 4 and sulcotrione; compound 9 and sulcotrione; compound 58 and sulcotrione; compound 64 and sulcotrione; compound 65 (and salts thereof) and sulcotrione; compound 94 and sulcotrione; compound 95 (and salts thereof) and sulcotrione; compound 96 and sulcotrione; compound 135 (and salts thereof) and sulcotrione; compound 4 and isoxaflutole; compound 9 and isoxaflutole; compound 58 and isoxaflutole; compound 64 and isoxaflutole; compound 65 (and salts thereof) and isoxaflutole; compound 94 and isoxaflutole; compound 95 (and salts thereof) and isoxaflutole; compound 96 and isoxaflutole; compound 135 (and salts thereof) and isoxaflutole; compound 4 and isoxaben; compound 9 and isoxaben; compound 58 and isoxaben; compound 64 and isoxaben; compound 65 (and salts thereof) and isoxaben; compound 94 and isoxaben; compound 95 (and salts thereof) and isoxaben; compound 96 and isoxaben; compound 135 (and salts thereof) and isoxaben; compound 4 and clomazone; compound 9 and clomazone; compound 58 and clomazone; compound 64 and clomazone; compound 65 (and salts thereof) and clomazone; compound 94 and clomazone; compound 95 (and salts thereof) and clomazone; compound 96 and clomazone; compound 135 (and salts thereof) and clomazone; compound 4 and beflubutamid; compound 9 and beflubutamid; compound 58 and beflubutamid; compound 64 and beflubutamid; compound 65 (and salts thereof) and beflubutamid; compound 94 and beflubutamid; compound 95 (and salts thereof) and beflubutamid; compound 96 and beflubutamid; compound 135 (and salts thereof) and beflubutamid; compound 4 and benfuresate; compound 9 and benfuresate; compound 58 and benfuresate; compound 64 and benfuresate; compound 65 (and salts thereof) and benfuresate; compound 94 and benfuresate; compound 95 (and salts thereof) and benfuresate; compound 96 and benfuresate; compound 135 (and salts thereof) and benfuresate; compound 4 and bentazone; compound 9 and bentazone; compound 58 and bentazone; compound 64 and bentazone; compound 65 (and salts thereof) and bentazone; compound 94 and bentazone; compound 95 (and salts thereof) and bentazone; compound 96 and bentazone; compound 135 (and salts thereof) and bentazone; compound 4 and benzobicyclon; compound 9 and benzobicyclon; compound 58 and benzobicyclon; compound 64 and benzobicyclon; compound 65 (and salts thereof) and benzobicyclon; compound 94 and benzobicyclon; compound 95 (and salts thereof) and benzobicyclon; compound 96 and benzobicyclon; compound 135 (and salts thereof) and benzobicyclon; compound 4 and benzofenap; compound 9 and benzofenap; compound 58 and benzofenap; compound 64 and benzofenap; compound 65 (and salts thereof) and benzofenap; compound 94 and benzofenap; compound 95 (and salts thereof) and benzofenap; compound 96 and benzofenap; compound 135 (and salts thereof) and benzofenap; compound 4 and bromobutide; compound 9 and bromobutide; compound 58 and bromobutide; compound 64 and bromobutide; compound 65 (and salts thereof) and bromobutide; compound 94 and bromobutide; compound 95 (and salts thereof) and bromobutide; compound 96 and bromobutide; compound 135 (and salts thereof) and bromobutide; compound 4 and butachlor; compound 9 and butachlor; compound 58 and butachlor; compound 64 and butachlor; compound 65 (and salts thereof) and butachlor; compound 94 and butachlor; compound 95 (and salts thereof) and butachlor; compound 96 and butachlor; compound 135 (and salts thereof) and butachlor; compound 4 and cafenstrole; compound 9 and cafenstrole; compound 58 and cafenstrole; compound 64 and cafenstrole; compound 65 (and salts thereof) and cafenstrole; compound 94 and cafenstrole; compound 95 (and salts thereof) and cafenstrole; compound 96 and cafenstrole; compound 135 (and salts thereof) and cafenstrole; compound 4 and clomeprop; compound 9 and clomeprop; compound 58 and clomeprop; compound 64 and clomeprop; compound 65 (and salts thereof) and clomeprop; compound 94 and clomeprop; compound 95 (and salts thereof) and clomeprop; compound 96 and clomeprop; compound 135 (and salts thereof) and clomeprop; compound 4 and dimepiperate; compound 9 and dimepiperate; compound 58 and dimepiperate; compound 64 and dimepiperate; compound 65 (and salts thereof) and dimepiperate; compound 94 and dimepiperate; compound 95 (and salts thereof) and dimepiperate; compound 96 and dimepiperate; compound 135 (and salts thereof) and dimepiperate; compound 4 and dimethametryn; compound 9 and dimethametryn; compound 58 and dimethametryn; compound 64 and dimethametryn; compound 65 (and salts thereof) and dimethametryn; compound 94 and dimethametryn; compound 95 (and salts thereof) and dimethametryn; compound 96 and dimethametryn; compound 135 (and salts thereof) and dimethametryn; compound 4 and diamuron; compound 9 and diamuron; compound 58 and diamuron; compound 64 and diamuron; compound 65 (and salts thereof) and diamuron; compound 94 and diamuron; compound 95 (and salts thereof) and diamuron; compound 96 and diamuron; compound 135 (and salts thereof) and diamuron; compound 4 and esprocarb; compound 9 and esprocarb; compound 58 and esprocarb; compound 64 and esprocarb; compound 65 (and salts thereof) and esprocarb; compound 94 and esprocarb; compound 95 (and salts thereof) and esprocarb; compound 96 and esprocarb; compound 135 (and salts thereof) and esprocarb; compound 4 and etobenzanide; compound 9 and etobenzanide; compound 58 and etobenzanide; compound 64 and etobenzanide; compound 65 (and salts thereof) and etobenzanide; compound 94 and etobenzanide; compound 95 (and salts thereof) and etobenzanide; compound 96 and etobenzanide; compound 135 (and salts thereof) and etobenzanide; compound 4 and fentrazamid; compound 9 and fentrazamid; compound 58 and fentrazamid; compound 64 and fentrazamid; compound 65 (and salts thereof) and fentrazamid; compound 94 and fentrazamid; compound 95 (and salts thereof) and fentrazamid; compound 96 and fentrazamid; compound 135 (and salts thereof) and fentrazamid; compound 4 and indanofan; compound 9 and indanofan; compound 58 and indanofan; compound 64 and indanofan; compound 65 (and salts thereof) and indanofan; compound 94 and indanofan; compound 95 (and salts thereof) and indanofan; compound 96 and' indanofan; compound 135 (and salts thereof) and indanofan; compound 4 and cumyluron; compound 9 and cumyluron; compound 58 and cumyluron; compound 64 and cumyluron; compound 65 (and salts thereof) and cumyluron; compound 94 and cumyluron; compound 95 (and salts thereof) and cumyluron; compound 96 and cumyluron; compound 135 (and salts thereof) and cumyluron; compound 4 and mefenacet; compound 9 and mefenacet; compound 58 and mefenacet; compound 64 and mefenacet; compound 65 (and salts thereof) and mefenacet; compound 94 and mefenacet; compound 95 (and salts thereof) and mefenacet; compound 96 and mefenacet; compound 135 (and salts thereof) and mefenacet; compound 4 and oxaziclomefone; compound 9 and oxaziclomefone; compound 58 and oxaziclomefone; compound 64 and oxaziclomefone; compound 65 (and salts thereof) and oxaziclomefone; compound 94 and oxaziclomefone; compound 95 (and salts thereof) and oxaziclomefone; compound 96 and oxaziclomefone; compound 135 (and salts thereof) and oxaziclomefone; compound 4 and oxadiargyl; compound 9 and oxadiargyl; compound 58 and oxadiargyl; compound 64 and oxadiargyl; compound 65 (and salts thereof) and oxadiargyl; compound 94 and oxadiargyl; compound 95 (and salts thereof) and oxadiargyl; compound 96 and oxadiargyl; compound 135 (and salts thereof) and oxadiargyl; compound 4 and pentoxazone; compound 9 and pentoxazone; compound 58 and pentoxazone; compound 64 and pentoxazone; compound 65 (and salts thereof) and pentoxazone; compound 94 and pentoxazone; compound 95 (and salts thereof) and pentoxazone; compound 96 and pentoxazone; compound 135 (and salts thereof) and pentoxazone; compound 4 and pyraclonil; compound 9 and pyraclonil; compound 58 and pyraclonil; compound 64 and pyraclonil; compound 65 (and salts thereof) and pyraclonil; compound 94 and pyraclonil; compound 95 (and salts thereof) and pyraclonil; compound 96 and pyraclonil; compound 135 (and salts thereof) and pyraclonil; compound 4 and pyrazolate; compound 9 and pyrazolate; compound 58 and pyrazolate; compound 64 and pyrazolate; compound 65 (and salts thereof) and pyrazolate; compound 94 and pyrazolate; compound 95 (and salts thereof) and pyrazolate; compound 96 and pyrazolate; compound 135 (and salts thereof) and pyrazolate; compound 4 and pyributicarb; compound 9 and pyributicarb; compound 58 and pyributicarb; compound 64 and pyributicarb; compound 65 (and salts thereof) and pyributicarb; compound 94 and pyributicarb; compound 95 (and salts thereof) and pyributicarb; compound 96 and pyributicarb; compound 135 (and salts thereof) and pyributicarb; compound 4 and pyriftalid; compound 9 and pyriftalid; compound 58 and pyriftalid; compound 64 and pyriftalid; compound 65 (and salts thereof) and pyriftalid; compound 94 and pyriftalid; compound 95 (and salts thereof) and pyriftalid; compound 96 and pyriftalid; compound 135 (and salts thereof) and pyriftalid; compound 4 and pyriminobac-methyl; compound 9 and pyriminobac-methyl; compound 58 and pyriminobac-methyl; compound 64 and pyriminobac-methyl; compound 65 (and salts thereof) and pyriminobac-methyl; compound 94 and pyriminobac-methyl; compound 95 (and salts thereof) and pyriminobac-methyl; compound 96 and pyriminobac-methyl; compound 135 (and salts thereof) and pyriminobac-methyl; compound 4 and thenylchlor; compound 9 and thenylchlor, compound 58 and thenylchlor; compound 64 and thenylchlor, compound 65 (and salts thereof) and thenylchlor, compound 94 and thenylchlor, compound 95 (and salts thereof) and thenylchlor; compound 96 and thenylchlor; compound 135 (and salts thereof) and thenylchlor; compound 4 and bispyribac-sodium; compound 9 and bispyribac-sodium; compound 58 and bispyribac-sodium; compound 64 and bispyribac-sodium; compound 65 (and salts thereof) and bispyribac-sodium; compound 94 and bispyribac-sodium; compound 95 (and salts thereof) and bispyribac-sodium; compound 96 and bispyribac-sodium; compound 135 (and salts thereof) and bispyribac-sodium; compound 4 and clefoxydim; compound 9 and clefoxydim; compound 58 and clefoxydim; compound 64 and clefoxydim; compound 65 (and salts thereof) and clefoxydim; compound 94 and clefoxydim; compound 95 (and salts thereof) and clefoxydim; compound 96 and clefoxydim; compound 135 (and salts thereof) and clefoxydim; compound 4 and cinosulfuron; compound 9 and cinosulfuron; compound 58 and cinosulfuron; compound 64 and cinosulfuron; compound 65 (and salts thereof) and cinosulfuron; compound 94 and cinosulfuron; compound 95 (and salts thereof) and cinosulfuron; compoun 96 and cinosulfuron; compound 135 (and salts thereof) and cinosulfuron; compound 4 and cyclosulfamuron; compound 9 and cyclosulfamuron; compound 58 and cyclosulfamuron; compound 64 and cyclosulfamuron; compound 65 (and salts thereof) and cyclosulfamuron; compound 94 and cyclosulfamuron; compound 95 (and salts thereof) and cyclosulfamuron; compound 96 and cyclosulfamuron; compound 135 (and salt thereof) and cyclosulfamuron; compound 4 and ethoxysulfuron,; compound . 9 and ethoxysulfuron; compound 58 and ethoxysulfuron; compound 64 and ethoxysulfuron; compound 65 (and salts thereof) and ethoxysulfuron; compound 94 and ethoxysulfuron; compound 95 (and salts thereof) and ethoxysulfuron; compound 96 and ethoxysulfuron; compound 135 (and salts thereof) and ethoxysulfuron; compound 4 and epoprodan; compound 9 and epoprodan; compound 58 and epoprodan; compound 64 and epoprodan; compound 65 (and salts thereof) and epoprodan; compound 94 and epoprodan; compound 95 (and salts thereof) and epoprodan; compound 96 and epoprodan; compound 135 (and salts thereof) and epoprodan; compound 4 and flucetosulfuron; compound 9 and flucetosulfuron; compound 58 and flucetosulfuron; compound 64 and flucetosulfuron; compound 65 (and salts thereof) and flucetosulfuron; compound 94 and flucetosulfuron; compound 95 (and salts thereof) and flucetosulfuron; compound 96 and flucetosulfuron; compound 135 (and salts thereof) and flucetosulfuron; compound 4 and imazosulfuron; compound 9 and imazosulfuron; compound 58 and imazosulfuron; compound 64 and imazosulfuron; compound 65 (and salts thereof) and imazosulfuron; compound 94 and imazosulfuron; compound 95 (and salts thereof) and imazosulfuron; compound 96 and imazosulfuron; compound 135 (and salts thereof) and imazosulfuron; compound 4 and metamifop; compound 9 and metamifop; compound 58 and metamifop; compound 64 and metamifop; compound 65 (and salts thereof) and metamifop; compound 94 and metamifop; compound 95 (and salts thereof) and metamifop; compound 96 and metamifop; compound 135 (and salts thereof) and metamifop; compound 4 and pyrazosulfuron-ethyl; compound 9 and pyrazosulfuron-ethyl; compound 58 and pyrazosulfuron-ethyl; compound 64 and pyrazosulfuron-ethyl; compound 65 (and salts thereof) and pyrazosulfuron-ethyl; compound 94 and pyrazosulfuron-ethyl; compound 95 (and salts thereof) and pyrazosulfuron-ethyl; compound 96 and pyrazosulfuron-ethyl; compound 135 (and salts thereof) and pyrazosulfuron-ethyl; compound 4 and quinclorac; compound 9 and quinclorac; compound 58 and quinclorac; compound 64 and quinclorac; compound 65 (and salts thereof) and quinclorac; compound 94 and quinclorac; compound 95 (and salts thereof) and quinclorac; compound 96 and quinclorac; compound 135 (and salts thereof) and quinclorac; compound 4 and flucarbazone-sodium; compound 9 and flucarbazone-sodium; compound 58 and flucarbazone-sodium; compound 64 and flucarbazone-sodium; compound 65 (and salts thereof) and flucarbazone-sodium; compound 94 and flucarbazone-sodium; compound 95 (and salts, thereof) and flucarbazone-sodium; compound 96 and flucarbazone-sodium; compound 135 (and salts thereof) and flucarbazone-sodium; compound 4 and propoxycarbazone-sodium; compound 9 and propoxycarbazone-sodium; compound 58 and propoxycarbazone-sodium; compound 64 and propoxycarbazone-sodium; compound 65 (and salts thereof) and propoxycarbazone-sodium; compound 94 and propoxycarbazone-sodium; compound 95 (and salts thereof) and propoxycarbazone-sodium; compound 96 and propoxycarbazone-sodium; compound 135 (and salts thereof) and propoxycarbazone-sodium; compound 4 and amicarbazone; compound 9 and amicarbazone; compound 58 and amicarbazone; compound 64 and amicarbazone; compound 65 (and salts thereof) and amicarbazone; compound 94 and amicarbazone; compound 95 (and salts thereof) and amicarbazone; compound 96 and amicarbazone; compound 135 (and salts thereof) and amicarbazone; compound 4 and florasulam; compound 9 and florasulam; compound 58 and florasulam; compound 64 and florasulam; compound 65 (and salts thereof) and florasulam; compound 94 and florasulam; compound 95 (and salts thereof) and florasulam; compound 96 and florasulam; compound 135 (and salts thereof) and florasulam; compound 4 and triasulfuron; compound 9 and triasulfuron; compound 58 and triasulfuron; compound 64 and triasulfuron; compound 65 (and salts thereof) and triasulfuron; compound 94 and triasulfuron; compound 95 (and salts thereof) and triasulfuron; compound 96 and triasulfuron; compound 135 (and salts thereof) and triasulfuron; compound 4 and triaziflam; compound 9 and triaziflam; compound 58 and triaziflam; compound 64 and triaziflam; compound 65 (and salts thereof) and triaziflam; compound 94 and triaziflam; compound 95 (and salts thereof) and triaziflam; compound 96 and triaziflam; compound 135 (and salts thereof) and triaziflam; compound 4 and pinoxaden; compound 9 and pinoxaden; compound 58 and pinoxaden; compound 64 and pinoxaden; compound 65 (and salts thereof) and pinoxaden; compound 94 and pinoxaden; compound 95 (and salts thereof) and pinoxaden; compound 96 and pinoxaden; compound 135 (and salts thereof) and pinoxaden; compound 4 and tritosulfuron; compound 9 and tritosulfuron; compound 58 and tritosulfuron; compound 64 and tritosulfuron; compound 65 (and salts thereof) and tritosulfuron; compound 94 and tritosulfuron; compound 95 (and salts thereof) and tritosulfuron; compound 96 and tritosulfuron; compound 135 (and salts thereof) and tritosulfuron; compound 4 and amidosulfuron; compound 9 and amidosulfuron; compound 58 and amidosulfuron; compound 64 and amidosulfuron; compound 65 (and salts thereof) and amidosulfuron; compound 94 and amidosulfuron; compound 95 (and salts thereof) and amidosulfuron; compound 96 and amidosulfuron; compound 135 (and salts thereof) and amidosulfuron; compound 4 and metosulam; compound 9 and metosulam; compound 58 and metosulam; compound 64 and metosulam; compound 65 (and salts thereof) and metosulam; compound 94 and metosulam; compound 95 (and salts thereof) and metosulam; compound 96 and metosulam; compound 135 (and salts thereof) and metosulam; compound 4 and sulfosulfuron; compound 9 and sulfosulfuron; compound 58 and sulfosulfuron; compound 64 and sulfosulfuron; compound 65 (and salts thereof) and sulfosulfuron; compound 94 and sulfosulfuron; compound 95 (and salts thereof) and sulfosulfuron; compound 96 and sulfosulfuron; compounds 135 (and salts thereof) and sulfosulfuron; compound 4 and pyraflufen-ethyl; compound 9 and pyraflufen-ethyl; compound 58 and pyraflufen-ethyl; compound 64 and pyraflufen-ethyl; compound 65 (and salts thereof) and pyraflufen-ethyl; compound 94 and pyraflufen-ethyl; compound 95 (and salts thereof) and pyraflufen-ethyl; compound 96 and pyraflufen-ethyl; compound 135 (and salts thereof) and pyraflufen-ethyl; compound 4 and HOK-201; compound 9 and HOK-201; compound 58 and HOK-201; compound 64 and HOK-201; compound 65 (and salts thereof) and HOK-201; compound 94 and HOK-201; compound 95 (and salts thereof) and HOK-201; compound 96 and HOK-201; compound 135 (and salts thereof) and HOK-201; compound 4 and KUH-021; compound 9 and KUH-021; compound 58 and KUH-021; compound 64 and KUH-021; compound 65 (and salts thereof) and KUH-021; compound 94 and KUH-021; compound 95 (and salts thereof) and KUH-021; compound 96 and KUH-021; compound 135 (and salts thereof) and KUH-021; compound 4 and CUH-35; compound 9 and CH-35; compound 58 and CUH-35; compound 64 and CUH-35; compound 65 (and salts thereof) and CUH-35; compound 94 and CUH-35; compound 95 (and salts thereof) and CUH-35; compound 96 and CUH-35; compound 135 (and salts thereof) and CUH-35. The proportions of the compounds of the invention with other herbicidal active ingredients in herbicidal compositions are generally in the ratio of 100:1 to 1:100, more commonly 10:1 to 1:10 and most commonly 5:1 to 1:5 by weight. The optimum ratios can be easily determined by those skilled in the art based on the weed control spectrum desired.

Particularly noteworthy because of greater than additive (i.e. synergistic) efficacy on certain weeds are mixtures of compounds of the invention with auxin transport inhibitors (phytotropins), an example being the combination of compound 1 (ethyl 6-amino-5-bromo-2-cyclopropyl-4-pyrimidinecarboxylate) with diflufenzopyr. Auxin transport inhibitors are chemical substances that inhibit auxin transport in plants, such as by binding with an auxin-carrier protein. Other examples of auxin transport inhibitors include naptalam (also known as N-(1-naphthyl)phthalamic acid and 2-[(1-naphthalenylamino)carbonyl]benzoic acid), 9-hydroxyfluorene-9-carboxylic acid and 2,3,5-triiodobenzoic acid. Therefore an aspect of the present invention relates to a herbicidal mixture comprising synergistically effective amounts of a compound of Claim 1 and an auxin transport inhibitor. Synergistically effective amounts of auxin transport inhibitors with the compounds of the invention can be easily determined.

Compounds of this invention can also be used in combination with herbicide safeners such as benoxacor, BCS (1-bromo-4-[(chloromethyl)sulfonyl]benzene), cloquintocet-mexyl, cyometrinil, dichlormid, 2-(dichloromethyl)-2-methyl-1,3-dioxolane (MG 191), fenchlorazole-ethyl, fenclorim, flurazole, fluxofenim, furilazole, isoxadifen-ethyl, mefenpyr-ethyl, methoxyphenone ((4-methoxy-3-methylphenyl)(3-methylphenyl)methanone), naphthalic anhydride (1,8-naphthalic anhydride) and oxabetrinil to increase safety to certain crops. Antidotally effective amounts of the herbicide safeners can be applied at the same time as the compounds of this invention, or applied as seed treatments. Therefore an aspects of the present invention relates to a herbicidal mixture comprising a compound of this invention and an antidotally effective amount of a herbicide safener. Seed treatment is particularly useful for selective weed control, because it physically restricts antidoting to the crop plants. Therefore a particularly useful embodiment of the present invention is a method for selectively controlling the growth of undesired vegetation in a crop comprising contacting the locus of the crop with a herbicidally effective amount of a compound of this invention wherein seed from which the crop is grown is treated with an antidotally effective amount of safener. Antidotally effective amounts of safeners can be easily determined by one skilled in the art through simple experimentation.

Compounds of this invention can also be used in combination with plant growth regulators such as aviglycine, N-(phenylmethyl)-1H-purin-6-amine, epocholeone, gibberellic acid, gibberellin A₄ and A₇, harpin protein, mepiquat chloride, prohexadione calcium, prohydrojasmon, sodium nitrophenolate and trinexapac-methyl, and plant growth modifying organisms such as Bacillus cereus strain BP01.

The following Tests demonstrate the control efficacy of the compounds of this invention against specific weeds. The weed control afforded by the compounds is not limited, however, to these species. See Index Tables A-D for compound descriptions. The following abbreviations are used in the Index Tables which follow: t means tertiary, s means secondary, n means normal, i means iso, c means cyclo, Me means methyl, Et means ethyl, Pr means propyl, i-Pr means isopropyl, Bu means butyl, Ph means phenyl, MeO means methoxy, EtO means ethoxy, and CN means cyano. "⊖" means negative formal charge, and "⊕" means positive formal charge. The abbreviation "dec." indicates that the compound appeared to decompose on melting. The abbreviation "Ex." stands for "Example" and is followed by a number indicating in which example the compound is prepared.

Seeds of barnyardgrass (Echinochloa crus-galli), crabgrass (Digitaria sanguinalis), giant foxtail (Setaria faberi), morningglory (Ipomoea spp.), redroot pigweed (Amaranthus retroflexus) and velvetleaf (Abutilon theophrasti) were planted into a blend of loam soil and sand and treated preemergence with a directed soil spray using test chemicals formulated in a non-phytotoxic solvent mixture which included a surfactant. At the same time these species were also treated with postemergence applications of test chemicals formulated in the same manner.

Plants ranged in height from 2 to 10 cm and were in the 1- to 2-leaf stage for the postemergence treatment. Treated plants and untreated controls were maintained in a greenhouse for approximately ten days, after which time all treated plants were compared to untreated controls and visually evaluated for injury. Plant response ratings, summarized in Table A, are based on a 0 to 100 scale where 0 is no effect and 100 is complete control. A dash (-) response means no test results.