JP2010006798A - Benzoylpyrazole-based compound, method for producing the same, and herbicide containing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new herbicide which can be applied to arable lands, non-arable lands and others, has a wide variety of use applications including the treatment of soils and the treatment of stems/leaves, and has an excellent herbicidal effect. <P>SOLUTION: A pyrazole-based compound is represented by formula (I) (wherein R<SP>1</SP>, R<SP>3</SP>and R<SP>4</SP>are each an alkyl; R<SP>2</SP>is H or an alkyl; R<SP>5</SP>is one alkoxy, one alkenyloxy or the like; R<SP>6</SP>is an alkylsulfonyl; and A is an alkylene optionally substituted with one or more alkyl groups) or a salt thereof. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a novel benzoylpyrazole compound useful as an active ingredient of a herbicide.

  Patent Documents 1 and 2 disclose benzoylpyrazole compounds, respectively. However, they do not specifically disclose benzoylpyrazole compounds represented by the following formula (I).

European Patent Application Publication No. 0352543 European Patent Application Publication No. 0282944

  Conventionally, there has been a demand for a herbicide that has excellent herbicidal performance against weeds and safety for cultivated crops in order to save labor in controlling weeds and improve productivity of agricultural and horticultural crops. Yes. In the development of new herbicides in the future, there is a demand for the creation of compounds that can exhibit the desired herbicidal effect while keeping the amount of applied herbage low. In addition, there is a demand for the creation of a compound that exhibits practical residual effects but does not remain in the soil more than necessary. Furthermore, the creation of compounds with high animal safety is desired. However, the search for new compounds suitable for such purposes relies on trial and error.

  The inventors of the present invention have completed the present invention as a result of various studies on benzoylpyrazole compounds in order to find better herbicides that solve the above problems. That is, the present invention relates to formula (I):

Wherein R ¹ is alkyl, R ² is a hydrogen atom or alkyl, R ³ is alkyl, R ⁴ is alkyl, R ⁵ is one alkoxy, one alkenyloxy or one alkynyl. Alkyl substituted with oxy; 1 alkoxy, 1 alkenyloxy or alkoxy optionally substituted with 1 alkynyloxy; alkenyloxy; alkynyloxy; or alkoxycarbonyl, R ⁶ is alkylsulfonyl, A is A benzoylpyrazole compound or a salt thereof, a method for producing them, a herbicide containing them as an active ingredient, and an effective herbicidal amount thereof. Apply to no plants or where it grows to prevent unwanted plants Or it relates to a method of inhibiting their growth.
In addition, the present invention is useful as an intermediate for producing the benzoylpyrazole compound represented by the above formula (I) or a salt thereof, and also useful as a herbicidal active ingredient:

(Wherein R ¹ , R ² , R ⁴ , R ⁵ and R ⁶ are as described above) or a salt thereof, a production method thereof, a herbicide containing them as an active ingredient, and The present invention relates to a method of applying an herbicidally effective amount of the above to an undesired plant or a place where it grows to control or suppress the undesired plant.

  The benzoylpyrazole compound represented by the above formula (I) or formula (II) or a salt thereof realizes a significant improvement in herbicidal activity against weeds as compared with similar conventional compounds, and also has a high safety against crops. Have sex.

In the above formula (I) or formula (II), the alkyl or alkyl moiety may be linear or branched, and specific examples thereof include methyl, ethyl, n-propyl, iso-propyl, and n-butyl. , Iso-butyl, sec-butyl, tert-butyl, n-pentyl, iso-pentyl, neopentyl, tert-pentyl, n-hexyl, iso-hexyl, n-heptyl, n-octyl, n-nonyl _1-9 are listed.

In the above formula (I) or formula (II), the alkenyl moiety may be linear or branched, and specific examples thereof include —CH═CH ₂ , —CH ₂ CH═CH ₂ , —CH _{2. CH 2 CH = CH 2, -CH} 2 C (CH 3) = CH 2, - (CH 2) 3 CH = CH 2, - (CH 2) 4 CH = CH 2, - (CH 2) 5 CH = CH _{2, - (CH 2) 6} CH = CH 2, - include those of the _(CH 2) 7 _{C 2-9} such as CH = CH _2.
In the above formula (I) or formula (II), the alkynyl moiety may be linear or branched, and specific examples thereof include —C≡CH, —CH ₂ C≡CH, —CH ₂ CH _2. C≡CH, —CH (CH ₃ ) C≡CH, — (CH ₂ ) ₃ C≡CH ₂ , — (CH ₂ ) ₄ C≡CH ₂ , — (CH ₂ ) ₅ C≡CH ₂ , — (CH ₂ ) C _2-9 such as ₆ C≡CH ₂ , — (CH ₂ ) ₇ C≡CH ₂ .

In the above formula (I), the alkylene moiety, for example, methylene, ethylene, trimethylene, tetramethylene, pentamethylene, hexamethylene, heptamethylene, octamethylene, include the C _1-9, such as nonamethylene.

  The salt of the benzoylpyrazole compound represented by the above formula (I) or formula (II) includes any one that is agriculturally acceptable, for example, an alkali such as sodium salt or potassium salt. Metal salts; alkaline earth metal salts such as magnesium salts and calcium salts; amine salts such as dimethylamine salts and triethylamine salts; inorganic acid salts such as hydrochlorides, perchlorates, sulfates and nitrates; acetates And organic acid salts such as methanesulfonate.

  The benzoylpyrazole compound represented by the above formula (I) or formula (II) may have optical isomers, and the present invention includes all the isomers. In the present specification, unless otherwise specified, it is described as an isomer mixture.

The benzoylpyrazole compound represented by the above formula (I) or formula (II) or a salt thereof (hereinafter abbreviated as the compound of the present invention) can be produced according to the following production method and normal salt production method.
The benzoylpyrazole compound represented by the above formula (I) can be produced according to the following reaction [A].

(In the formula, R ¹ , R ² , R ³ , R ⁴ , R ⁵ , R ⁶ and A are as described above, and Hal is halogen.)
The above reaction can be performed in the presence of a solvent, if necessary. The solvent may be any solvent that is inert to the reaction, for example, ketones such as acetone, ethyl methyl ketone, and diethyl ketone; halogenated hydrocarbons such as methylene chloride, chloroform, dichloroethane, and trichloroethane. Aromatic hydrocarbons such as benzene, toluene, xylene and nitrobenzene; esters such as methyl acetate, ethyl acetate and propyl acetate; acetonitrile, N, N-dimethylformamide (DMF), dimethyl sulfoxide (DMSO), Examples include aprotic polar solvents such as dimethylacetamide (DMA), hexamethylphosphoric triamide (HMPA), and sulfolane; ethers such as diethyl ether, dioxane, tetrahydrofuran (THF), and dimethoxyethane. As the solvent, one or more of these can be appropriately selected.

  The above reaction can be performed in the presence of a base, if necessary. The base may be an organic base or an inorganic base. Examples of the organic base include tertiary amines such as triethylamine and diisopropylethylamine; pyridine, 4- (dimethylamino) pyridine, 2,6-lutidine and the like. Examples of the inorganic base include alkali metal carbonates such as sodium carbonate and potassium carbonate; alkali metal hydrogen carbonates such as sodium hydrogen carbonate and potassium hydrogen carbonate; alkaline earth metal carbonates such as calcium carbonate and barium carbonate An alkali metal hydroxide such as sodium hydroxide or potassium hydroxide; an alkali metal cyanide such as sodium cyanide or potassium cyanide; These bases can be used by appropriately selecting and mixing one or more of them in an amount of 0.01 to 100 equivalents with respect to the compound of formula (II).

The above reaction can be carried out in the presence of a catalyst, if necessary. Examples of the catalyst include n-butylammonium bromide, n-butylammonium chloride, tetra-n-butylphosphonium bromide, sodium iodide, potassium iodide and the like.
The reaction temperature for the above reaction is usually from 0 ° C to 150 ° C, and the reaction time is usually from 1 minute to 48 hours.
The benzoylpyrazole compound represented by the above formula (II) contains a novel compound and can be produced according to the following reaction [B].

(Wherein R ¹ , R ² , R ⁴ , R ⁵ and R ⁶ are as described above.)
That is, the compound represented by the formula (II) can be produced by a rearrangement reaction of the compound represented by the formula (IV).
The above reaction can be performed in the presence of a solvent, if necessary. The solvent may be any solvent as long as it is inert to the reaction. For example, halogenated hydrocarbons such as methylene chloride, chloroform, dichloroethane, and trichloroethane; aromatics such as benzene, toluene, xylene, and nitrobenzene. Hydrocarbons; esters such as methyl acetate, ethyl acetate, propyl acetate; aprotic polar solvents such as acetonitrile, DMF, DMSO, DMA, HMPA, sulfolane; such as diethyl ether, dioxane, THF, dimethoxyethane And ethers. As the solvent, one or more of these can be appropriately selected.

The above reaction can be performed in the presence of a base, if necessary. The base may be either an organic base or an inorganic base, and examples include those exemplified in the above reaction [A]. These bases can be used by appropriately selecting and mixing one or more of them in an amount of 0.01 to 100 equivalents with respect to the compound of formula (IV).
In the above reaction, a catalyst can be added as necessary. As the catalyst, acetone cyanohydrin can be used in an amount of 0.01 to 10 equivalents with respect to the compound of formula (IV).

The reaction temperature for the above reaction is usually from 0 ° C to 150 ° C, and the reaction time is usually from 1 minute to 48 hours.
The compound represented by the above formula (IV) can be produced according to the following reaction [C].

(In the formula, R ¹ , R ² , R ⁴ , R ⁵ , R ⁶ and Hal are as described above.)
That is, the compound represented by the formula (IV) is obtained by reacting the compound represented by the formula (V) or a salt thereof such as hydrochloride, sulfate, nitrate, etc. with the compound represented by the formula (VI). Can be manufactured.
The above reaction can be carried out in the presence of a solvent, if necessary. The solvent may be any solvent as long as it is inert to the reaction, and examples include those exemplified in the above reaction [B]. One or more of these can be selected as appropriate.

The above reaction can be performed in the presence of a base, if necessary. The base may be either an organic base or an inorganic base, and examples include those exemplified in the above reaction [A]. These bases can be used by appropriately selecting and mixing one or more of them in an amount of 1 to 100 equivalents relative to the compound of formula (VI).
The reaction temperature for the above reaction is usually from 0 ° C to 150 ° C, and the reaction time is usually from 1 minute to 48 hours.
The compound represented by the above formula (VI) can be produced according to the following reaction [D].

(In the formula, R ⁴ , R ⁵ , R ⁶ and Hal are as described above.)
In the above reaction, a halogenating agent such as thionyl chloride or oxalyl chloride can be reacted for 1 to 100 equivalents with respect to the compound represented by the formula (VII).

The above reaction can be performed in the presence of a solvent, if necessary. The solvent may be any solvent as long as it is inert to the reaction, and examples include those exemplified in the above reaction [B]. One or more of these can be selected as appropriate.
In the above reaction, a catalyst can be used as necessary. Examples of the catalyst include DMF.
The reaction temperature for the above reaction is usually from 0 ° C to 150 ° C, and the reaction time is usually from 1 minute to 48 hours.
In addition to the above method, the compound represented by the formula (IV) can be produced according to the following reaction [E].

(Wherein R ¹ , R ² , R ⁴ , R ⁵ and R ⁶ are as described above.)
That is, the compound represented by the formula (IV) is obtained by dehydrating the compound represented by the formula (V) or a salt thereof, such as hydrochloride, sulfate, nitrate, and the compound represented by the formula (VII). It can manufacture by making it react using an agent.
Examples of the dehydrating agent used in the above reaction include DCC (dicyclohexylcarbodiimide) and 1-ethyl 3- (3-dimethylaminopropyl) -carbodiimide hydrochloride.

The above reaction can be performed in the presence of a solvent, if necessary. The solvent may be any solvent as long as it is inert to the reaction, and examples include those exemplified in the above reaction [B]. One or more of these can be selected as appropriate.
The above reaction can be performed in the presence of a base, if necessary. Examples of the base include tertiary amines such as triethylamine and diisopropylethylamine; pyridine, 4- (dimethylamino) pyridine, 2,6-lutidine and the like. These bases can be used by appropriately selecting and mixing one or more of them in an amount of 1 to 100 equivalents with respect to the compound represented by the formula (VII).

The reaction temperature for the above reaction is usually from 0 ° C to 150 ° C, and the reaction time is usually from 1 minute to 48 hours.
The compound represented by the formula (VII) can be produced according to the following reaction [F].

(In the formula, R ⁴ , R ⁵ and R ⁶ are as described above, and L is a protecting group such as alkyl.)
The compound represented by the formula (VII) can be produced by hydrolyzing the compound represented by the formula (VIII) in the presence of water.
The above reaction can be performed in the presence of a solvent, if necessary. The solvent may be any solvent as long as it is inert to the reaction. For example, aromatic hydrocarbons such as benzene, toluene and xylene; acetonitrile, DMF, DMSO, DMA, HMPA, sulfolane and the like. Aprotic polar solvent; ethers such as diethyl ether, dioxane, THF, dimethoxyethane; methanol, ethanol, normal propanol, isopropanol, butyl alcohol (1-butanol), isobutyl alcohol, secondary butyl alcohol (2-butanol), Examples include alcohols such as tertiary butyl alcohol (2-methyl-2-propanol); water and the like. As a solvent, these 1 type (s) or 2 or more types can be selected suitably.

The above reaction can be performed in the presence of a base or an acid, if necessary. The base may be either an organic base or an inorganic base, and examples include those exemplified in the above reaction [A]. Examples of the acid include hydrochloric acid, sulfuric acid, perchloric acid and the like. These bases or acids can be used by appropriately selecting and mixing one or more of them in an amount of 1 to 100 equivalents with respect to the compound represented by the formula (VIII).
The reaction temperature for the above reaction is usually from 0 ° C to 150 ° C, and the reaction time is usually from 1 minute to 48 hours.
Among the compounds represented by the above formula (VIII), a compound in which R ⁵ is R ^5-a-1 can be produced according to the following reaction [G].

Wherein R ^5-a-1 is one alkoxy, one alkenyloxy or one alkynyloxy substituted alkoxy; alkenyloxy; or alkynyloxy, R ^6-a-1 is alkylthio Yes, L, R ⁴ , R ⁶ and Y ² are as described above.)
That is, the compound represented by the formula (VIII-a-1) can be produced by reacting the compound represented by the formula (IX) with an oxidizing agent in the presence of a solvent.

Examples of the oxidizing agent used in the above reaction include hydrogen peroxide, peracetic acid, metachloroperbenzoic acid, and the like.
The solvent used in the above reaction may be any solvent as long as it is inert to the reaction. For example, halogenated hydrocarbons such as methylene chloride, chloroform, dichloroethane, and trichloroethane; ketones such as acetone and methyl ethyl ketone. Ethers such as diethyl ether, dioxane, THF, dimethoxyethane; acetic acid and the like. As the solvent, one or more of these can be appropriately selected.

The reaction temperature for the above reaction is usually from 0 ° C to 150 ° C, and the reaction time is usually from 1 minute to 48 hours.
The above reaction can be carried out in the presence of a catalyst, if necessary. Examples of the catalyst include sodium tungstate or a hydrate thereof.
The compound represented by the above formula (IX) can be produced according to the following reaction [H].

(In the formula, L, R ⁴ , R ^5-a-1 and R ^6-a-1 are as described above.)
That is, the compound represented by the formula (IX) can be produced by reacting the compound represented by the formula (X) with an alkali metal thioalkoxide.
Examples of the alkali metal thioalkoxide used in the above reaction include sodium thiomethoxide and sodium thioethoxide.

  The above reaction can be performed in the presence of a solvent, if necessary. The solvent may be any solvent as long as it is inert to the reaction, and examples thereof include aprotic polar solvents such as acetonitrile, DMF, DMSO, DMA, HMPA, sulfolane, and dimethoxyethane. As the solvent, one or more of these can be appropriately selected.

The reaction temperature for the above reaction is usually from 0 ° C to 150 ° C, and the reaction time is usually from 1 minute to 48 hours.
The compound represented by the above formula (X) can be produced according to the following reaction [I].

Wherein R ^α is one alkoxy, one alkenyloxy or one alkyl optionally substituted with one alkynyloxy; alkenyl; or alkynyl, and X is a leaving group such as a halogen or a methanesulfonyloxy group , L, R ⁴ , R ^5-a-1 and Y ² are as described above.)
That is, the compound represented by the formula (X) can be produced by reacting the compound represented by the formula (XI) and the compound represented by the formula (XII) in the presence of a base.

  The base that can be used in the above reaction may be either an inorganic base or an organic base. Examples of the organic base include triethylamine, diisopropylethylamine, pyridine, 4- (dimethylamino) pyridine, 2,6-lutidine and the like. Examples of the inorganic base include alkali metal carbonates such as sodium carbonate and potassium carbonate; alkali metal hydroxides such as sodium hydroxide and potassium hydroxide; alkali metal hydrides such as sodium hydride and potassium hydride. Etc. These bases can be used by appropriately selecting and mixing one or two or more of them in an amount of 0.5 to 100 equivalents relative to the compound of formula (XI).

The above reaction can be carried out in the presence of a solvent, if necessary. The solvent may be any solvent as long as it is inert to the reaction, and examples include those exemplified in the above reaction [B]. One or more of these can be selected as appropriate.
The above reaction can be carried out in the presence of a catalyst, if necessary. Examples of the catalyst include potassium iodide and tetranormal butyl ammonium iodide.

The reaction temperature for the above reaction is usually from 0 ° C to 150 ° C, and the reaction time is usually from 1 minute to 48 hours.
In addition to the above method, the compound represented by the formula (VIII-a-1) can be produced according to the following reaction [J].

(In the formula, L, R ⁴ , R ^5-a-1 , R ⁶ , R ^α and X are as described above.)
That is, the compound represented by the formula (VIII-a-1) can be produced by reacting the compound represented by the formula (XIII) with the compound represented by the formula (XII) in the presence of a base. it can.
The above reaction can be carried out in the same manner as in the above reaction [I].
The compound represented by the above formula (XIII) can be produced according to the following reaction [K].

(Wherein R ⁴ , R ⁶ and L are as described above.)
That is, the compound represented by the formula (XIII) can be produced by reacting the compound represented by the formula (XIV) with a Lewis acid such as boron tribromide, aluminum chloride, or iron bromide. .

  The above reaction can be carried out in the presence of a solvent, if necessary. Any solvent may be used as long as it is inert to the reaction. For example, halogenated hydrocarbons such as methylene chloride, chloroform, dichloroethane, and trichloroethane; aromatic hydrocarbons such as benzene, toluene, and xylene. And esters such as methyl acetate, ethyl acetate, and propyl acetate. As the solvent, one or more of these can be appropriately selected.

The reaction temperature for the above reaction is usually from 0 ° C to 150 ° C, and the reaction time is usually from 1 minute to 48 hours.
The compound represented by the above formula (XIV) can be produced according to the following reaction [L].

(Wherein R ⁴ , R ⁶ and L are as described above.)
That is, the compound represented by the formula (XIV) can be produced by a reaction in which the protective group L is introduced into the compound represented by the formula (XV).
The above reaction can be performed in the presence of a solvent, if necessary. The solvent may be any solvent that is inert to the reaction, for example, aromatic hydrocarbons such as benzene, toluene, and xylene; esters such as methyl acetate, ethyl acetate, and propyl acetate; Halogenated hydrocarbons such as methylene, chloroform, dichloroethane, and trichloroethane; aprotic polar solvents such as acetonitrile, DMF, DMSO, DMA, HMPA, and sulfolane. As the solvent, one or more of these can be appropriately selected.

The above reaction can be carried out in the presence of an acid, if necessary. Examples of the acid that can be used in the above reaction include hydrochloric acid and sulfuric acid.
The reaction temperature for the above reaction is usually from 0 ° C to 150 ° C, and the reaction time is usually from 1 minute to 48 hours.
Among the compounds represented by the above formula (VIII), a compound in which R ⁵ is R ^5-a-2 can be produced according to the following reaction [M].

Wherein R ^5-a-2 is alkyl substituted with one alkoxy, one alkenyloxy or one alkynyloxy, R ^5-a-3 is bromoalkyl, L, R ⁴ , R ⁶ and Y ¹ are as described above.)
The above reaction can be performed in the presence of a solvent, if necessary. The solvent may be any solvent as long as it is inert to the reaction, such as methanol, ethanol, normal propanol, isopropanol, butyl alcohol (1-butanol), isobutyl alcohol, secondary butyl alcohol (2-butanol). , Alcohols such as tertiary butyl alcohol (2-methyl-2-propanol); esters such as methyl acetate, ethyl acetate, propyl acetate; ethers such as diethyl ether, dioxane, THF, dimethoxyethane; acetonitrile And aprotic polar solvents such as DMF, DMSO, DMA, HMPA, and sulfolane. As the solvent, one or more of these can be appropriately selected.

The above reaction can be performed in the presence of a base, if necessary. Examples of the base include alkali metal hydrides such as sodium hydride and potassium hydride.
The reaction temperature for the above reaction is usually from 0 ° C to 150 ° C, and the reaction time is usually from 1 minute to 48 hours.
Among the compounds represented by the formula (VII), the compound represented by the formula (VII-a-1) in which R ⁵ is R ^5-a-1 can be produced according to the following reaction [N]. it can.

(In the formula, R ⁴ , R ^5-a-1 , R ⁶ and Hal are as described above.)
That is, the compound represented by the formula (VII-a-1) comprises a compound represented by the formula (XVII), carbon monoxide or an equivalent thereof, and H ₂ O in the presence of a catalyst and a base. It can be produced by reacting.
The base used in the above reaction may be either an inorganic base or an organic base. Examples of the organic base include triethylamine, tributylamine, diisobutylethylamine, pyridine, 4- (dimethylamino) pyridine, 2,6-lutidine and the like. Examples of the inorganic base include alkali metal carbonates such as sodium carbonate, potassium carbonate and cesium carbonate; alkali metal hydroxides such as sodium hydroxide and potassium hydroxide; alkaline earths such as calcium hydroxide and barium hydroxide Metal hydroxides; alkali metal acetates such as sodium acetate and potassium acetate. These bases can be used by appropriately selecting and mixing one or more of them in an amount of 0.1 to 100 equivalents with respect to the compound represented by the formula (XVII).
Examples of the catalyst used in the above reaction include palladium chloride, palladium acetate, tetrakis (triphenylphosphine) palladium, dichlorobis (triphenylphosphine) palladium, trans-di (μ-acetate) bis [o- (di-o-tolylphosphino). )] Palladium catalysts such as benzyl] dipalladium and palladium carbon; ruthenium catalysts such as triruthenium dodecacarbonyl; and rhodium catalysts such as chlorobis (cyclooctene) rhodium (I). These catalysts can be used by appropriately selecting and mixing one or two or more of them in an amount of 10 ⁻¹⁰ to 1 equivalent to the compound represented by the formula (XVII).
Examples of carbon monoxide equivalents that can be used in the above reaction include hexacarbonylmolybdenum, formic acid, chloroform, and the like. Carbon monoxide or an equivalent thereof can be reacted with the compound represented by the formula (XVII) at 1 to 1000 equivalents under pressure as necessary. The pressure can be appropriately selected within a range of 1 to 100 MPa.

The above reaction can be performed in the presence of a solvent, if necessary. The solvent may be any solvent as long as it is inert to the reaction, such as water; methanol, ethanol, normal propanol, isopropanol, butyl alcohol (1-butanol), isobutyl alcohol, secondary butyl alcohol (2-butanol). ), Alcohols such as tertiary butyl alcohol (2-methyl-2-propanol); aromatic hydrocarbons such as benzene, toluene, xylene and nitrobenzene; esters such as methyl acetate, ethyl acetate and propyl acetate Aprotic polar solvents such as acetonitrile, DMF, DMSO, DMA, HMPA, sulfolane; those exemplified in diethyl ether, dioxane, THF, dimethoxyethane, and the like. As a solvent, these 1 type (s) or 2 or more types can be selected suitably.
The said reaction can be performed in presence of a ligand as needed. As a ligand, tri-t-butylphosphine, tricyclohexylphosphine, triphenylphosphine, tri (o-tolyl) phosphine, 1,4-bis (diphenylphosphino) butane, 1,3-bis (diphenylphosphino) Examples include pentane and 1,1′-bis (diphenylphosphino) ferrocene. These ligands can be used by appropriately selecting and mixing one or two or more of these in an amount of 10 ⁻¹⁰ to 1 equivalent to the compound represented by the formula (XVII).
The above reaction can be carried out in the presence of a promoter as required. Examples of the cocatalyst include alkali metal halides such as sodium chloride, potassium chloride, sodium bromide and potassium bromide; and quaternary ammonium salts such as tetra (normal butyl) ammonium bromide. These cocatalysts can be used by appropriately selecting and mixing one or more of them in an amount of 0.001 to 1 equivalent to the compound represented by the formula (XVII).
The above reaction can be carried out under an inert gas as necessary. Examples of the inert gas include nitrogen gas and argon gas.
The reaction temperature for the above reaction is usually from 0 ° C to 300 ° C, and the reaction time is usually from 1 minute to 72 hours.
The compound represented by the above formula (XVII) can be produced according to the following reaction [O].

(In the formula, R ^α , R ⁴ , R ^5-a-1 , R ⁶ and Hal are as described above, and Hal-1 is halogen.)
The above reaction can be performed in the presence of a base as necessary. Bases include alkali metal carbonates such as sodium carbonate, potassium carbonate and cesium carbonate; alkaline earth metal carbonates such as calcium carbonate and barium carbonate; alkalis such as lithium hydroxide, sodium hydroxide and potassium hydroxide Metal hydroxides; alkaline earth metal hydroxides such as calcium hydroxide and barium hydroxide; alkali metal hydrides such as lithium hydride, sodium hydride or potassium hydride; alkali lithium reagents such as normal butyl lithium Sodium amide (NaNH ₂ ); and Grignard reagents such as methylmagnesium bromide and isopropylmagnesium chloride.
Examples of the metal salt of the compound represented by the formula (XIX) that can be used in the above reaction include alkali metal salts such as sodium salt and potassium salt.
The above reaction can be performed in the presence of a solvent, if necessary. Any solvent may be used as long as it is inert to the reaction, such as methanol, ethanol, normal propanol, isopropanol, butyl alcohol (1-butanol), isobutyl alcohol, secondary butyl alcohol (2-butanol), and tertiary. Alcohols such as butyl alcohol (2-methyl-2-propanol) and methoxyethanol; ethers such as diethyl ether, tetrahydrofuran, dioxane, dimethoxyethane, and cyclohexyl methyl ether; non-such as DMF, DMSO, DMA, and sulfolane Protic polar solvents; non-polar solvents such as benzene and toluene. In addition, the compound represented by the formula (XIX) can also serve as a reaction reagent and a solvent. As the solvent, one or more of these can be appropriately selected.
The above reaction can be carried out under an inert gas as necessary. Examples of the inert gas include nitrogen gas and argon gas.
The reaction temperature for the above reaction is usually from 0 ° C to 200 ° C, and the reaction time is usually from 1 minute to 48 hours.

  The compound of the present invention exhibits an excellent herbicidal effect when used as an active ingredient of a herbicide. The range of application ranges widely from agricultural fields such as paddy fields, upland fields, orchards, mulberry fields, and non-agricultural land such as forests, farm roads, grounds, and factory sites. Applicable methods include soil treatment, foliage treatment, and flooding treatment as appropriate. You can choose.

The compound of the present invention, for example barnyard grass or barnyardgrass (barnyardgrass (Echinochloa crus-galli L. , Echinochloa oryzicola vasing.)), Crabgrass (crabgrass (Digitaria sanguinalis L., Digitaria ischaemum Muhl., Digitaria adscendens Henr., Digitaria microbachne Henr., Digitaria horizontalis Willd.)), Green foxtail ( Setaria viridis L.)), Akino foxtail ( Setaria faberi Herrm.)), Yellow foxtail ( Setaria lutescens Hubb.), Goosegrass ( Eleusine indica ) .)), Oats (wild oat ( Avena fatua L.)), sorghum sorghum (johnsongrass ( Sorghum halepense L.)), shibamugi (quackgrass ( Agropyron repens L.)), velvet millet (alexandergrass ( Brachiaria plantaginea )), guinea millet guineagrass ( Panicum maximum Jacq.)), Paragrass ( Panicum purpurascens ), Azegaya (sprangletop ( Leptochloa chinensis ))), Red sprangletop ( Lept ochloa panicea)), annual bluegrass (annual bluegrass (Poa annua L.) ), foxtail (black grass (Alopecurus myosuroides Huds. )), Kamojigusa (cholorado bluestem (Agropyron tsukushiense (Honda ) Ohwi)), Meriken Nik millet (broadleaf signalgrass ( .. Brachiaria platyphylla Nash)), Shinkurinoiga (southern sandbur (Cenchrus echinatus L.) ), darnel (italian ryegrass (Lolium multiflorum Lam) ), bermudagrass (bermudagrass (Cynodon dactylon Pers)) grass weeds (gramineae) such as; Kogomegatsutsu (rice flatsedge ( Cyperus iria L.)), Hamasuge (purple nutsedge ( Cyperus rotundus L.)), Yellow jasmine (yellow nutsedge ( Cyperus esculentus L.)), Firefly (Japanese bulrush ( Scirpus juncoides )), Japanese bulrush ( flatsedge ) (Cyperus serotinus )), Tamagayatsuri (small-flower umbrellaplant ( Cyperus difformis )), Matsubai (slender spikerush ( Eleocharis acicularis )), Krogwai (water chestnut ( Eleochari) s sedge weeds such as kuroguwai)) (cyperaceae); arrowhead (Japanese ribbon waparo (Sagittaria pygmaea) ), Alismataceae (arrow-head (Sagittaria trifolia) ), Alismataceae family such as alisma canaliculatum (narrowleaf waterplantain (Alisma canaliculatum)) weeds (alismataceae); vaginalis (monochoria (monochoria vaginalis)), monochoria korsakowii pontederiaceae weeds such as (monochoria species (monochoria korsakowii)) (pontederiaceae); false pimpernel (false pimpernel (Lindernia pyxidaria)) , Abunome (abunome (Dopatrium junceum) Scrophulariaceae such as); lythraceae such as toothcup ( Rotala india ), red stem ( Ammannia multiflora ); long stem waterwort ( Elatine triandra SCHK) ), Velvetleaf ( Abutilon theophrasti MEDIC.), American king deer (prickly sida ( Sida spinosa L.)) Mulberry weed (malvaceae); Onamomi (common cocklebur ( Xanthium strumarium L.)), Ragweed (common ragweed ( Ambrosia elatior L.)), Ezo fox thistle (thistle ( Breea setosa (BIEB.) KITAM.)), Hakudameiku (hairy galinsoga ( Galinsoga ciliata Blake)), Compositae, such as chamomile (wild chamomile ( Matricaria chamomilla L.)); black nightshade ( Solanum nigrum L.), white nightshade (Jmsonweed ( Datura solanaceae such as stramonium ); slender amaranth ( Amaranthus viridis L.), amaranthaceae such as red root pigweed ( Amaranthus retroflexus L.); pale smartweed Polygonaceea such as ( Polygonum lapathifolium L.)), Hartade (ladysthumb ( Polygonum persicaria L.)), Buckwheat (wild buckwheat ( Polygonum convolvulus L.))), Polygonum aviculare (knotweed ( Polygonum aviculare L.)) e); cruciferae such as cruciferae (flexuous bittercress ( Cardamine flexuosa WITH.)), mushrooms (shepherd's-purse ( Capsella bursa-pastoris Medik.)), mustard ( Brassica juncea Czern.)) ); Convolvulaceae, such as tall morningglory ( Ipomoea purpurea L.), convolvulus (field bindweed ( Calystegia arvensis L.)), American morning glory (ivyleaf morningglory ( Ipomoea hederacea Jacq.)); Weeds such as common lambsquarters ( Chenopodium album L.), red weeds such as mexican burningbush ( Kochia scoparia Schrad.), Common purslane ( Portulaca oleracea L.) (Portulacaceae); sicklepod (sicklepod (Cassia obtusifolia L.)) Leguminosae weeds (Leguminosae) such as; chickweed (common chickweed (Stellaria media L.) ) Caryophyllaceae weeds such as (Caryophyllace ae); Lamiaceae weeds (labiatae) such as henbit ( Lamium amplexicaule L.); Rubiaceae weeds (catchweed ( Galium spurium L.)); threeseeded copperleaf ( Acalypha australis) Various harmful weeds such as Euphorbiaceae such as L.)) and Commelinaaceae such as common dayflower ( Commelina communis L.) can be controlled. Therefore, useful crops such as corn (corn ( Zea mays L.)), soybean (soybean ( Glycine max Merr.)), Cotton (cotton ( Gossypium spp.)), Wheat (wheat ( Triticum spp.)), Rice ( rice ( Oryza sativa L.)), barley (barley ( Hordeum Vulgare L.)), rye (rye ( Secale cereale L.)), oat (oat ( Avena sativa L.)), sorghum (sorgo ( Sorghum bicolor Moench)) ), Oilseed rape (rape ( Brassica napus L.)), sunflower (sunflower ( Helianthus annuus L.)), sugar beet (suger beet ( Beta Vulgaris L.)), sugar cane (suger cane ( Saccharum officinarum L.)), turf ( japanese lawngrass ( Zoysia japonica stend )), peanuts (peanut ( Arachis hypogae a L.)), flax (flax ( Linum usitatissimum L.)), tobacco (tobacco ( Nicotiana tabacum L.)), coffee (coffee ( Coffea spp. )) Is used effectively when harmful weeds are controlled selectively or when it is non-selectively controlled harmful weeds. The compound of the present invention is selected for cultivation of corn, soybean, cotton, wheat, rice, rape, sunflower, sugar beet, sugar cane, turf, peanut, flax, tobacco, coffee, etc., among them corn, wheat, rice, turf, etc. It is effectively used when controlling harmful weeds. In the cultivation of these crops, for example, in the cultivation of corn, among the above-mentioned harmful weeds, grass weeds and mallow weeds are typical harmful weeds. One of them. While the compound of the present invention has the safety of crops, it can be used effectively not only for controlling the above-mentioned harmful weeds but also for controlling difficult-to-control harmful weeds such as Enocorosa, Guinea millet and Ichibi.

The compounds of the present invention are usually mixed with various agricultural adjuvants, powders, granules, granule wettable powders, wettable powders, tablets, pills, capsules (including forms packaged in water-soluble films), aqueous suspensions. It can be formulated and applied in the form of a suspension, oily suspension, microemulsion formulation, suspoemulsion formulation, aqueous solvent, emulsion, solution, paste, etc. It can be in any formulation form commonly used in the art.
Adjuvants used in the formulation include solid carriers such as diatomaceous earth, slaked lime, calcium carbonate, talc, white carbon, kaolin, bentonite, kaolinite and sericite, clay, sodium carbonate, sodium bicarbonate, sodium sulfate, zeolite, starch, etc. Solvent such as water, toluene, xylene, solvent naphtha, dioxane, acetone, isophorone, methyl isobutyl ketone, chlorobenzene, cyclohexane, dimethyl sulfoxide, dimethylformamide, dimethylacetamide, N-methyl-2-pyrrolidone, alcohol; fatty acid salt, benzoic acid Acid salt, alkylsulfosuccinate, dialkylsulfosuccinate, polycarboxylate, alkylsulfate, alkylsulfate, alkylarylsulfate, alkyldiglycolethersulfate, alcohol Sulfate ester salt, alkyl sulfonate salt, alkyl aryl sulfonate salt, aryl sulfonate salt, lignin sulfonate salt, alkyl diphenyl ether disulfonate salt, polystyrene sulfonate salt, alkyl phosphate ester salt, alkyl aryl phosphate salt, styryl aryl Phosphate, polyoxyethylene alkyl ether sulfate, polyoxyethylene alkyl aryl ether sulfate, polyoxyethylene alkyl aryl ether sulfate, polyoxyethylene alkyl ether phosphate, polyoxyethylene alkyl aryl phosphate Such as polyoxyethylene aryl ether phosphate ester salt, naphthalene sulfonate formalin condensate, alkyl naphthalene sulfonate formalin condensate Surfactants and spreading agents: sorbitan fatty acid ester, glycerin fatty acid ester, fatty acid polyglyceride, fatty acid alcohol polyglycol ether, acetylene glycol, acetylene alcohol, oxyalkylene block polymer, polyoxyethylene alkyl ether, polyoxyethylene alkylaryl Ether, polyoxyethylene styryl aryl ether, polyoxyethylene glycol alkyl ether, polyethylene glycol, polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene glycerin fatty acid ester, polyoxyethylene hydrogenated castor oil, polyoxypropylene fatty acid Nonionic surfactants and spreading agents such as esters; olive oil, kapok oil, sunflower Examples thereof include vegetable oil, palm oil, coconut oil, coconut oil, sesame oil, corn oil, rice bran oil, peanut oil, cottonseed oil, soybean oil, rapeseed oil, flaxseed oil, linseed oil, liquid paraffin and other vegetable oils and mineral oils. These adjuvants can be used by appropriately selecting one or two or more kinds without departing from the object of the present invention. For example, extenders, thickeners, anti-settling agents, antifreeze agents, dispersion agents Various commonly used adjuvants such as stabilizers, safeners, antifungal agents, foaming agents, disintegrants, binders and the like can also be used. The compounding ratio of the compound of the present invention and various adjuvants is 0.1: 99.9 to 95: 5, preferably 0.2: 99.8 to 85:15.

  The application rate of the herbicide containing the compound of the present invention cannot be defined unconditionally due to differences in weather conditions, soil conditions, formulation forms, types of target weeds, application time, etc., but generally the compound of the present invention is 0.1 to 5,000 per hectare. g, preferably 0.5 to 1,000 g, more preferably 1 to 500 g. The present invention includes a method for controlling harmful weeds by application of such a herbicide.

  In addition, the herbicide containing the compound of the present invention can be mixed or used in combination with other agricultural chemicals, fertilizers, safeners and the like, and in this case, more excellent effects and functions may be exhibited. Other pesticides include herbicides, fungicides, antibiotics, plant hormones, insecticides and the like. In particular, a mixed herbicidal composition in which the compound of the present invention and one or more active ingredient compounds of other herbicides are mixed or used in combination has a range of applicable herb species, timing of chemical treatment, herbicidal activity, etc. It is possible to improve in the preferred direction. In addition, the compound of the present invention and other herbicidal active ingredient compounds may be prepared separately and mixed at the time of spraying, or both may be used together. The above-described mixed herbicidal composition is also included in the present invention.

  The mixing ratio of the compound of the present invention and the active ingredients of other herbicides cannot be defined unconditionally due to differences in weather conditions, soil conditions, drug formulation, application time, application method, etc. On the other hand, other herbicides contain 0.001 to 10,000 parts by weight, preferably 0.01 to 1,000 parts by weight of the active ingredient per one kind. In addition, the appropriate amount to be applied is 0.1 to 10,000 g, preferably 0.2 to 5,000 g, more preferably 10 to 3,000 g as the total amount of active ingredient compounds per hectare. The present invention also includes a method for controlling harmful weeds by application of such a mixed herbicidal composition.

Examples of the active ingredients of other herbicides include those listed below (generic names; including those for which some ISO applications have been filed), but salts, alkyl esters, etc. exist in these compounds even if not specifically described. Of course, they are also included.
(1) 2,4-D, 2,4-D-butotyl, 2,4-D-butyl, 2,4-D dimethylammonium (2 , 4-D-dimethylammonimum), 2,4-D-diolamine (2,4-D-diolamine), 2,4-D-ethyl, 2,4-D-2-ethylhexyl (2,4-D-2-ethylhexyl), 2,4-D-isobutyl, 2,4-D-isooctyl, 2,4-D-isopropyl (2,4-D-isopropyl), 2,4-D-isopropylammonium, 2,4-D sodium (2,4-D-sodium), 2,4-D isopropanolammonium (2,4-D-isopropanolammonium), 2,4-D-trolamine (2,4-D-trolamine), 2,4-DB, 2,4-DB-butyl, 2, , 4-DB-dimethylammonium, 2,4-DB iso-o Chill (2,4-DB-isoctyl), 2,4-DB potassium (2,4-DB-potassium), 2,4-DB sodium (2,4-DB-sodium), dichloroprop (dichlorprop), dichloro Propbutyl (dichlorprop-butotyl), dichloroprop-dimethylammonium, dichloroprop-isoctyl, dichlorprop-potassium, dichloroprop-P, dichloroprop -P dimethylammonium, dichloroprop-P-potassium, dichloroprop-P-sodium, MCPA, MCPA-butotyl, MCPA dimethyl Ammonium (MCPA-dimethylammonium), MCPA-2-ethylhexyl, MCPA potassium MCPA-potassium), MCPA sodium (MCPA-sodium), MCPA thioethyl (MCPA-thioethyl), MCPB, MCPB ethyl (MCPB-ethyl), MCPB sodium (MCPB-sodium), mecoprop (mecoprop), mecoprop butyl (mecoprop -butotyl), mecoprop-sodium, mecoprop-P, mecoprop-P-butotyl, mecoprop-P-dimethylammonium, mecoprop-P Phenoxy systems such as 2-ethylhexyl, mecoprop-P-potassium, naproanilide, and clomeprop; 2,3,6-TBA, dicamba (Dicamba), dicamba-butotyl, dicamba-diglycolamine Dicamba-dimethylammonium, dicamba-diolamine, dicamba-isopropylammonium, dicamba-potassium, dicamba-sodium, diclobenil ( dichlobenil, picloram, picloram-dimethylammonium, picloram-isoctyl, picloram-potassium, picloram-triisopropanolammonium ), Picloram-triisopropylammonium, picloram-trolamine, triclopyr, triclopyr-butotyl, triclopyr-trietammonium (triclopyr-triet) aromatic carboxylic acids such as hylammonium, clopyralid, clopyralid-olamine, clopyralid-potassium, clopyralid-triisopropanolammonium, aminopyralid; other naptalams (Naptalam), sodium naptalam (naptalam-sodium), benazolin, benazolin-ethyl, quinclorac, quinmerac, diflufenzopyr, diflufenzopyr Pyrsodium (diflufenzopyr-sodium), fluoxypyr (fluroxypyr), fluoxypyr-2-butoxy-1-methylethyl (fluroxypyr-2-butoxy-1-methylethyl), fluoxypyrmeptyl (fluroxypyr-meptyl), chloroflurenol ( chlorflurenol) Chloro Hulhule Nord methyl (chlorflurenol-methyl) What is showing a herbicidal activity by disrupting hormone action in plants, such as.

  (2) chlorotoluron, diuron, fluometuron, linuron, isoproturon, metobenzuron, tebuthiuron, dimefuron, isouron, isouron Ureas such as karbutilate, methabenzthiazuron, metoxuron, monolinuron, neburon, siduron, terbumeton, trietazine; simazine (Simazine), atrazine, atratone, simetryn, promethrin, dimethametryn, hexazinone, metribuzin, terbuthylazine, cyananadin e) Triazines such as ametryn, cybutryne, triaziflam, terbutryn, propazine, metamitron, prometon; bromacil, bromacil Uracils like lithium (bromacyl-lithium), lenacil, terbacil; anilides like propanil, cypromid; swep, desmedipham, fen Carbamates such as phenmedipham; bromoxynil, bromoxynil-octanoate, bromoxynil-heptanoate, ioxynil, ioxynyloctano Ate (ioxynil-octanoate) Hydroxybenzonitriles such as ioxynil-potassium, ioxynil-sodium; other pyridates, bentazone, bentazone-sodium, amicarbazone, methazole ( Methazole), pentanochlor (pentanochlor), etc. that are said to show herbicidal efficacy by inhibiting plant photosynthesis.

  (3) Quaternary ammonium salt systems such as paraquat and diquat, which are said to themselves become free radicals in the plant body and generate active oxygen to show rapid herbicidal efficacy.

  (4) Nitrofen, Chlomethoxyfen, bifenox, acifluorfen, acifluorfen-sodium, fomesafen, fomesafen-sodium ), Oxyfluorfen, lactofen, aclonifen, ethoxyfen-ethyl, HC-252, fluoroglycofen-ethyl, fluoroglycofen Diphenyl ether type: Chlorphthalim, flumioxazin, flumiclorac, flumiclorac-pentyl, cinidon-ethyl, fluthiacet-methyl Other cyclic imides; other oxadiargyl, oxadiazon, sulfentrazone, carfentrazone-ethyl, thidiazimin, pentoxazone, azafenidin, Isopropazole, pyraflufen-ethyl, benzfendizone, butafenacil, saflufenacil, saflufenacil, flupoxam, fluazolate, profluazol ), Pyraclonil, flufenpyr-ethyl, bencarbazone, and other substances that inhibit the biosynthesis of plants and cause abnormal accumulation of photosensitized peroxides in the plant body. Shows herbicidal efficacy What is being

  (5) pyridazinones such as norflurazon, chloridazon, metflurazon; pyrazolynate, pyrazoloxyfen, benzofenap, topramezone, BAS-670H, pyra Pyrazoles such as pyrasulfotole; other amitrole, fluridone, flurtamone, diflufenican, methoxyphenone, clomazone, sulcotrione, Mesotrione, tembotrione, tefuryltrione, AVH-301, isoxaflutole, difenzoquat, difenzoquat methyl sulfate (d Inhibits pigment biosynthesis of carotenoids such as ifenzoquat-metilsulfate, isoxachlortole, benzobicyclon, picolinafen, biflubutamide (beflubutamid), etc. It is supposed to show herbicidal efficacy.

  (6) Dicloofop-methyl, diclofop, pyriphenop-sodium, fluazifop-butyl, fluazifop, fluazifop-P (fluazifop-P) Fluazifop-P-butyl, haloxyfop-methyl, haloxyfop, haloxyfop-etotyl, haloxyfop-P, haloxyhop -P-methyl, quizalofop-ethyl, quizalofop-P, quizalofop-P-ethyl, quizalofop-P-ethyl (quizalofop-P-ethyl) quizalofop-P-tefuryl), cyhalofop-butyl, fenoxaprop-ethyl, phenoxaprop-P fenoxaprop-P), fenoxaprop-P-ethyl, metamifop-propyl, metamifop, clodinafop-propargyl, clodinafop, Aryloxyphenoxypropionic acid systems such as propaquizafop; alloxydim-sodium, alloxydim, clethodim, sethoxydim, tralkoxydim, butroxydim, Cyclohexanediones such as tepraloxydim, profoxydim, cycloxydim; others, flamprop-M-methyl, flamprop-M, flamprop Prop-M-isopropyl ( flamprop-M-isopropyl), etc., which have a strong herbicidal effect specifically on gramineous plants.

  (7) Chlorimuron-ethyl, chlorimuron, sulfometuron-methyl, sulfometuron, primisulfuron-methyl, primisulfuron, Bensulfuron-methyl, bensulfuron, chlorsulfuron, methsulfuron-methyl, metsulfuron, cinosulfuron, pyrazosulfuron-ethyl , Pyrazosulfuron, azimsulfuron, flazasulfuron, rimsulfuron, nicosulfuron, imazosulfuron, cyclosulfamuron, prosulfuron (p) rosulfuron), flupirsulfuron-methyl-sodium, flupirsulfuron, triflusulfuron-methyl, triflusulfuron, halosulfuron-methyl, halos Ruflon (halosulfuron), thifensulfuron-methyl, thifensulfuron (thifensulfuron), ethoxysulfuron, oxasulfuron, etamethsulfuron, ethametsulfuron- ethametsulfuron- methyl), iodosulfuron, iodosulfuron-methyl-sodium, sulfosulfuron, triasulfuron, tribenuron-methyl, tribenuron uron, tritosulfuron, foramsulfuron, trifloxysulfuron, trifloxysulfuron-sodium, mesosulfuron-methyl, mesosulfuron, Sulfonylureas such as orthosulfamuron, flucetosulfuron, amidosulfuron, TH-547, compounds described in International Publication WO2005092104; flumetsulam, metosulam ), Diazolam, triazolopyrimidinesulfonamides such as cloransulam-methyl, florasulam, penoxsulam; imazapyr, imazapyr isopropyl Imazapyr-isopropylammonium, imazethapyr, imazethapyr-ammonium, imazaquin, imazaquin-ammonium, imazamox, imazamox-ammonium ), Imazamethabenz, imazamethabenz-methyl, imazapic, imidazolinones such as pyrithiobac-sodium, bispyribac-sodium, pyri Pyrimidinyl salicylic acid series such as pyriminobac-methyl, pyribenzoxim, pyrifalid, pyrimisulfan, KUH-021; flucarbazone, flucarbazone sodium sulfonylaminocarbonyltriazolinones such as zone-sodium, propoxycarbazone-sodium, propoxycarbazone; other glyphosate, glyphosate-sodium, glyphosate potassium -potassium), glyphosate-ammonium, glyphosate-diammonium, glyphosate-isopropylammonium, glyphosate-trimesium, glyphosate-sesquisonate, glyphosate-sesquisodium such as glufosinate, glufosinate-ammonium, vilanafos, bilanafos-sodium, cinmethylin What is showing the herbicidal activity by inhibiting an amino acid biosynthesis of plants.

  (8) Trifluralin, oryzalin, oryzalin, nitalin, pendimethalin, ethalluralin, benfluralin, prodiamine, butralin, dinitramine ( dinitroaniline such as dinitramine); amide such as bensulide, napropamide, propyzamide, pronamide; amiprofos-methyl, butamifos, anilophos (Anilofos), organic phosphorus systems such as piperophos; phenyl carbamate systems such as propham, chlorpropham, barban, carbetamide; daimuron, cumylron ( cumyluron), Bromob Cumylamines such as bromobutide, methyldymron; other asuram, asuram-sodium, dithiopyr, thiazopyr, chlorthal-dimethyl, chlortal (Chlorthal), diphenamid (diphenamid), etc. that are said to show herbicidal efficacy by inhibiting plant cell mitosis.

  (9) alachlor, metazachlor, butachlor, pretilachlor, metolachlor, S-metolachlor, tenylchlor, petoxamide Chloroacetamides such as acetochlor, propachlor, dimethenamid, dimethenamid-P, propisochlor, dimethachlor; molinate, Dimepiperate, pyributicarb, EPTC, butyrate, vernolate, pebulate, cycloate, prosulfocarb, esprocarb, thiobencar Thiocarbamate systems such as thiobencarb, diallate, tri-allate, orbencarb; other etobanzanid, mefenacet, flufenacet, toridiphan (Tridiphane), caffenstrole, fentrazamide, oxaziclomefone, indanofan, benfuresate, pyroxasulfone, KIH-485, dalapon, dalapon What is said to show herbicidal efficacy by inhibiting plant protein biosynthesis or lipid biosynthesis, such as sodium (dalapon-sodium), TCA sodium (TCA-sodium), and trichloroacetic acid.

  (10) MSMA, DSMA, CMA, endothal (endothall), endothal dipotassium, endothal sodium (endothall-sodium), endtal mono (N, N-dimethylalkylammonium) (endothall-mono ( N, N-dimethylalkylammonium)), etofumesate, sodium chlorate, pelargonic acid, nonanoic acid), phosamine, fosamine-ammonium, pinoxaden ( pinoxaden), HOK-201, aclolein, ammonium sulfamate, borax, chloroacetic acid, sodium chloroacete, cyanamide, methylarsonic acid), dimethylarsone Acid (dimethylarsinic acid), sodium dimethylarsinate, dinoterb, dinoterb-ammonium, dinoterb-diolamine, dinoterb-acetate, DNOC, Ferrous sulfate, flupropanate, sodium flupropanate (flupropanate-sodium), isoxaben, mefluidide, mefluidide-diolamine, metam ), Metam-ammonium, metam-potassium, metam-sodium, methyl isothiocyanate, pentachlorophenol, sodium pentachlorophenoxide , Penta Lolo phenol laurate (pentachlorophenol laurate), quinoclamine (quinoclamine), sulfuric acid (sulfuric acid), such as urea sulfate (urea sulfate).

(11) Xanthomonas campestris (Xanthomonas campestris), epi heart Sils Nematosorusu (Epicoccosirus nematosorus), epi heart Sils Nematosuperasu (Epicoccosirus nematosperus), Ekiserohiramu monoceras (Exserohilum monoseras), parasitic plants such as Drechslera monoceras (Drechsrela monoceras) It is supposed to show herbicidal efficacy by doing.

Next, although an example of the desirable aspect of the present invention is described, the present invention is not limited to these.
(1) A benzoylpyrazole compound or a salt thereof, wherein, in the above formula (I), R ² is a hydrogen atom, R ⁵ is alkoxycarbonyl, and A is alkylene.
(2) In the above formula (I), R ¹ is methyl, R ² is a hydrogen atom, R ³ is tertiary butyl, R ⁴ is methyl, R ⁵ is methoxycarbonyl, R A benzoylpyrazole compound (Compound No. a6-1 below), wherein ⁶ is methylsulfonyl and A is methylene.
(3) A benzoylpyrazole compound or a salt thereof, wherein, in the above formula (I), R ⁵ is alkoxy.
(4) A benzoylpyrazole compound or a salt thereof, wherein, in the above formula (I), R ² is a hydrogen atom, R ⁵ is alkoxy, and A is alkylene.
(5) In the above formula (I), R ¹ is methyl, R ² is a hydrogen atom, R ³ is tertiary butyl, R ⁴ is methyl, R ⁵ is normal propoxy, R A benzoylpyrazole compound (Compound No. a6-7 below), wherein ⁶ is methylsulfonyl and A is methylene.
(6) A benzoylpyrazole compound or a salt thereof, wherein, in the formula (I), R ² is a hydrogen atom, R ⁵ is alkoxy substituted with one alkoxy, and A is alkylene.
(7) In the above formula (I), R ¹ is ethyl, R ² is a hydrogen atom, R ³ is tertiary butyl, R ⁴ is methyl, and R ⁵ is 2-methoxyethoxy , R ⁶ is methylsulfonyl, and A is methylene, a benzoylpyrazole compound (the following compound No. a12-13).

(8) A benzoylpyrazole compound or a salt thereof, wherein, in the above formula (II), R ⁵ is alkoxy.
(9) (5-Hydroxy-1-methyl-1H-pyrazol-4-yl) (2-methyl-4- (methylsulfonyl) -3-normalpropoxyphenyl) ketone (the following compound No. c-1).
(10) (3-Normal butoxy-2-methyl-4- (methylsulfonyl) phenyl) (5-hydroxy-1-methyl-1H-pyrazol-4-yl) ketone (the following compound No. c-2).
(11) (5-Hydroxy-1-methyl-1H-pyrazol-4-yl) (3-isobutoxy-2-methyl-4- (methylsulfonyl) phenyl) ketone (the following compound No. c-3).

(12) A herbicidal composition containing the benzoylpyrazole compound or salt thereof of (1) to (11) above and an agricultural auxiliary.
(13) A method of applying a herbicidally effective amount of the benzoylpyrazole compound or salt thereof of (1) to (11) to an undesired plant or a place where it grows, and controlling or inhibiting the growth of the undesired plant .
(14) The method according to (13), wherein an undesirable plant is controlled or its growth is suppressed in a corn field.
(15) The method according to (14) above, wherein corn is transformed.
(16) The method according to (13), wherein an undesirable plant is controlled or its growth is suppressed in a wheat field.
(17) The method according to (13) above, wherein an undesirable plant is controlled or its growth is suppressed in a rice field.
(18) The method according to (13) above, wherein undesired plants are controlled or their growth is suppressed in non-agricultural land.
(19) The benzoylpyrazole compound of formula (I), the benzoylpyrazole compound of formula (II) or the benzoylpyrazole compounds of (1) to (11) above as an active ingredient of a selective herbicide in a corn field Use of a compound or salt thereof.

  Next, examples of the present invention will be described, but the present invention is not limited thereto. Hereafter, the synthesis example of this invention compound is described.

Synthesis example 1
Synthesis of methyl 2-methyl-3- (1-methyl-5- (pivaloyloxymethoxy) -1H-pyrazole-4-carbonyl) -6- (methylsulfonyl) benzoate (compound No.a6-1 below)
Methyl 3- (5-hydroxy-1-methyl-1H-pyrazole-4-carbonyl) -2-methyl-6- (methylsulfonyl) benzoate (200 mg) was dissolved in methyl ethyl ketone (30 mL), and potassium carbonate ( 80 mg), chloromethyl pivalate (170 mg) and a catalytic amount of tetranormalbutylammonium bromide were added, and the mixture was heated to reflux for 3 hours. The reaction mixture was cooled to room temperature, ethyl acetate (250 mL) was added, and the mixture was washed once with saturated brine. The organic layer was dried over anhydrous sodium sulfate, the solvent was distilled off under reduced pressure, and the resulting residue was purified by silica gel column chromatography (developing solvent / ethyl acetate: normal hexane = 1: 1) to obtain the desired product ( 220 mg) was obtained.

Synthesis example 2
Synthesis of (1-methyl-4- (2-methyl-4- (methylsulfonyl) -3-normalpropoxybenzoyl) -1H-pyrazol-5-yloxy) methyl pivalate (the following compound No. a6-7) (1) Under a nitrogen atmosphere, 60 wt% sodium hydride-paraffin dispersion (920 mg) was dispersed in anhydrous tetrahydrofuran (50 mL), and normal propanol (1.51 g) was added thereto. After stirring at room temperature for 2 hours and further at 50 ° C. for 15 minutes, 1,3-dichloro-2-methyl-4- (methylsulfonyl) benzene (5 g) was added, and the mixture was stirred at room temperature for 12 hours. The reaction mixture was poured into water and extracted with ethyl acetate (250 mL). The organic layer was dried over anhydrous sodium sulfate and the solvent was distilled off under reduced pressure to obtain 1-chloro-2-methyl-4- (methylsulfonyl) -3-normalpropoxybenzene (5.6 g) as white crystals.
¹ H-NMR 400 MHz (CDCl ₃ , δppm): 1.01 (3H, t, J = 7.6Hz), 1.83 (2H, m), 2.29 (3H, s), 3.15 (3H, s), 4.03 (2H, q, J = 7.2Hz), 7.23 (1H, d, J = 8.8Hz), 7.67 (1H, d, J = 8.8Hz).
(2) Dissolve 1-chloro-2-methyl-4- (methylsulfonyl) -3-normalpropoxybenzene (5.5 g) obtained in step (1) above in isopropanol (50 mL) in a stainless steel autoclave. Sodium carbonate (3.3 g), 5 wt% palladium carbon (200 mg), water (5 mL) and 1,4-bis (diphenylphosphino) butane (200 mg) were added thereto. The mixture was stirred at 180 ° C. for 12 hours in a carbon monoxide (2 MPa) atmosphere, and then cooled to room temperature. To the mixture were added 1N aqueous sodium hydroxide solution (100 mL) and tertiary butyl methyl ether (100 mL), and the insoluble material was removed by filtration through celite. The aqueous layer was acidified with 2N hydrochloric acid and extracted with ethyl acetate. The organic layer was dried over anhydrous sodium sulfate, and the solvent was distilled off under reduced pressure. The obtained solid was recrystallized (ethyl acetate-normal hexane) to give 2-methyl-4- (methylsulfonyl) -3-normalpropoxybenzoic acid (2.5 g) as white crystals.
¹ H-NMR 400 MHz (Acetone-d ₆ , δppm): 1.08 (3H, t, J = 7.2Hz), 1.90 (2H, qt, J = 7.2Hz, 6.8Hz), 2.53 (3H, s), 3.27 (3H, s), 4.02 (2H, t, J = 6.8Hz), 7.81 (2H, s).
(3) 2-Methyl-4- (methylsulfonyl) -3-normalpropoxybenzoic acid (1 g) obtained in the above step (2) is dissolved in anhydrous chloroform (20 mL), and oxalyl chloride (930 mg) and A catalytic amount of dimethylformamide was added and stirred at room temperature for 2 hours. The solvent and excess reagent were distilled off under reduced pressure, and the residue was dissolved in anhydrous tetrahydrofuran (25 mL). 5-hydroxy-1-methyl-1H-pyrazole (400 mg) and triethylamine (740 mg) were added, and the mixture was stirred at room temperature for 1 hour, and then insoluble matters were removed by filtration through celite. The filtrate was concentrated under reduced pressure, the residue was dissolved in acetonitrile (25 mL), catalytic amounts of acetone cyanohydrin and triethylamine (740 mg) were added, and the mixture was stirred at room temperature for 12 hours. The solvent was distilled off under reduced pressure, and the residue was dissolved in 1N aqueous sodium hydroxide solution (150 mL) and extracted with tertiary butyl methyl ether. The aqueous layer was acidified with 2N hydrochloric acid and extracted twice with ethyl acetate. The organic layer was dried over anhydrous sodium sulfate, and the solvent was distilled off under reduced pressure to obtain (5-hydroxy-1-methylpyrazol-4-yl) (2-methyl-4- (methylsulfonyl) -3-normalpropoxyphenyl. ) Ketone (the following compound No. c-1, 750 mg) was obtained.
(4) The (5-hydroxy-1-methylpyrazol-4-yl) (2-methyl-4- (methylsulfonyl) -3-normalpropoxyphenyl) ketone (470 mg) obtained in the above step (3) was converted to methyl ethyl ketone. (30 mL), chloromethyl pivalate (400 mg), potassium carbonate (185 mg) and a catalytic amount of tetranormalbutylammonium bromide were added, and the mixture was heated to reflux for 3 hours. The reaction solution was cooled to room temperature, ethyl acetate (250 mL) was added, and the mixture was washed once with saturated brine. The organic layer was dried over anhydrous sodium sulfate, the solvent was distilled off under reduced pressure, and the obtained residue was purified by silica gel column chromatography (developing solvent / ethyl acetate: normal hexane = 1: 1) to obtain the desired product (200 mg).

Synthesis example 3
Synthesis of (1-ethyl-4- (3- (2-methoxyethoxy) -2-methyl-4- (methylsulfonyl) benzoyl) -1H-pyrazol-5-yloxy) methyl pivalate (compound No. a12-13 below) )
(1) (1-Ethyl-5-hydroxy-1H-pyrazol-4-yl) (3- (2-methoxyethoxy) -2-methyl-4- (methylsulfonyl) phenyl) ketone (430 mg) 30 mL), potassium carbonate (150 mg), chloromethyl pivalate (340 mg) and a catalytic amount of tetranormalbutylammonium bromide were added, and the mixture was heated to reflux with stirring. After stirring for 3 hours, the oil bath was removed and the mixture was cooled to room temperature. Ethyl acetate (200 mL) was added to the reaction mixture, and the mixture was washed twice with saturated brine. The organic layer was dried over anhydrous magnesium sulfate and the solvent was distilled off under reduced pressure. The resulting residue was purified by silica gel column chromatography (developing solvent / ethyl acetate: normal hexane = 1: 1) to obtain the desired product ( 120 mg) was obtained.

Next, representative examples of the compounds represented by the above formula (I) are listed in Tables a1 to a66, and their ¹ H-NMR spectral data are listed in Table b. These compounds can be synthesized based on the above synthesis examples or various production methods of the above-described compounds of the present invention. In the table, No. indicates a compound number.
Moreover, some novel compounds exist in the compound represented by the above formula (II). They are listed in Table c and their ¹ H-NMR spectral data are listed in Table d.
In the table, Me represents a methyl group, Et represents an ethyl group, n-Pr represents a normal propyl group, i-Pr represents an isopropyl group, n-Bu represents a normal butyl group, and s-Bu represents a secondary class. A butyl group, i-Bu represents an isobutyl group, and t-Bu represents a tertiary butyl group.

Next, test examples are described.
Test example 1
A field crop soil was filled in a 1 / 170,000 hectare pot and seeds of various plants were sown. After that, the plant had a certain leaf age ((1) barnyardgrass ( Echinochloa crus-galli L.); 1.2-3.1 leaf stage, (2) barbyard (crabgrass ( Digitaria sanguinalis L.)); 1.1-3.2 leaf stage (3) Green foxtail ( Setaria viridis L.); 1.5-4.0 leaf stage, (4) Red root pigweed ( Amaranthus retroflexus L.); Cotyledon-2.1 leaf stage, (5) American golden beet ( prickly sida ( Sida spinosa L.)); cotyledon to 1.3 leaves, (6) velvetleaf ( Abutilon theophrasti MEDIC.); cotyledons to 2.0 leaves, (7) rice (rice ( Oryza sativa L.)); 1.2 to 2.3 leaf stage, (8) Corn ( Zea mays L.); 2.2 to 4.0 leaf stage, (9) soybean ( Glycine max Merr.); Primary leaf to 0.3 leaf stage, (9) When wheat (wheat ( Triticum spp.); 2.0-3.2 leaf stage) is reached, a wettable powder or emulsion prepared according to the conventional method of preparation of the compound of the present invention is weighed so as to have a predetermined active ingredient amount. 1 Diluted in water equivalent to 500 liters per kutar (contains 0.1% by volume of agricultural spreading agent (xalino: manufactured by Nippon Agricultural Chemicals Co., Ltd.)). The prepared spray was treated with a small spray.
14 to 24 days after drug treatment, the growth state of various plants was observed with the naked eye, and the herbicidal effect was evaluated at a growth inhibition rate (%) of 0 (equivalent to the untreated group) to 100 (completely killed). The table results were obtained.

Test example 2
1 / 170,000 hectare pot filled with upland field soil, seeds of various plants (barnyardgrass ( Echinochloa crus-galli L.), barkyard (crabgrass ( Digitaria sanguinalis L.))), green foxtail ( Setaria viridis L.) ), Red root pigweed ( Amaranthus retroflexus L.), American deer (prickly sida ( Sida spinosa L.)), green velvetleaf ( Abutilon theophrasti MEDIC.), Rice (rice ( oryza sativa L.)), Corn (corn ( Zea mays L.)), soybean (soybean ( Glycine max Merr.)) And wheat (wheat ( Triticum spp.)) Were sown.The day after sowing, the compound of the present invention was prepared according to the usual formulation method. The wettable powder or emulsion was weighed so as to have a predetermined amount of active ingredient, diluted in water equivalent to 500 liters per hectare, and soil-treated with a small spray.
On the 20th to 21st day after the chemical treatment, the state of growth of various plants was observed with the naked eye, and the herbicidal effect was evaluated at a growth inhibition rate (%) of 0 (equivalent to the untreated group) to 100 (completely killed). The table results were obtained.

Test example 3
Paddy soil was stuffed into 1 / 1,000,000 hectare pots, seeds of barnyardgrass ( Echinochloa oryzicola vasing.) And firefly (Japanese bulrush ( Scirpus juncoides )) were sown and lightly covered with soil. Thereafter, the tube was left in a greenhouse at a water depth of 0.5 to 1 cm, and a tuber of Urikawa (Japanese ribbon waparo ( Sagittaria pygmaea )) was implanted the next day or 2 days later. Thereafter, the water depth was maintained at 3 to 4 cm, and when the Tainubier and Firefly reached the 0.5 leaf stage and Urikawa reached the primary leaf stage, the compound of the present invention was diluted in water with a wettable powder or emulsion prepared according to the usual formulation method. The liquid was dropped evenly with a pipette so as to obtain a predetermined active ingredient amount. In addition, paddy soil is packed in 1 / 1,000,000 hectare pots, paddling is carried out, the water depth is 3-4 cm, and the next leaf rice (rice ( Oryza sativa L.)) (variety: Nipponbare) is transplanted 3 cm Transplanted. On the 4th day after transplantation, the compound of the present invention was treated as described above.
Gross growth of Tainubie, firefly and urikawa 13 to 15 days after drug treatment, and rice growth state 20 to 23 days after drug treatment, and 0 (equivalent to untreated area) to 100 (completely) The results are shown in Table g.

Test example 4
1 / 1,000,000 ha Pot is filled with upland field soil and seeds of various plants are sown. Then, plants ((1) green foxtail ( Setaria viridis L.)), (4) velvetleaf ( Abutilon theophrasti MEDIC.), (2) guineagrass ( Panicum maximum Jacq.), ) When the corn ( Zea mays L.)) reaches a certain leaf age, the wettable powder of the compound No.a12-13 of the present invention prepared according to the usual formulation method, the following control compound 1 Weighed the emulsion and the wettable powder of the following control compound 2 to the prescribed active ingredient amount (3.5 to 15 g / ha) and water equivalent to 300 liters per hectare (MSO Concentrate; Cognis Dilute to 0.5 vol%). Treat the prepared spray with a small spray.
The growth state of various plants is visually observed 14 to 28 days after the chemical treatment, and the herbicidal effect is evaluated at a growth inhibition rate (%) of 0 (equivalent to the untreated group) to 100 (completely killed). The compound No.a12-13 of the present invention exhibits an excellent herbicidal effect and excellent crop safety compared to the following target compounds.

Next, formulation examples of the present invention will be described.
Formulation Example 1
(1) Compound of the present invention 75 parts by weight (2) Geropone T-77 (trade name; manufactured by Rhone-Poulenc) 14.5 parts by weight (3) NaCl 10 parts by weight (4) dextrin 0.5 parts by weight or more The ingredients are put into a high-speed mixing fine granulator, 20% water is further added thereto, and granulated and dried to obtain a granulated wettable powder.

Formulation Example 2
(1) Kaolin 78 parts by weight (2) Labelin FAN (trade name; manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) 2 parts by weight (3) Solpol 5039 (trade name; manufactured by Toho Chemical Industry Co., Ltd.) 5 parts by weight (4 ) Carplex (trade name; manufactured by DSL Japan Co., Ltd.) 15 parts by weight or more, the mixture of the components (1) to (4) and the compound of the present invention are mixed at a weight ratio of 9: 1 to obtain a wettable powder. can get.

Formulation Example 3
(1) High filler No. 10 (trade name; manufactured by Matsumura Sangyo Co., Ltd.) 33 parts by weight (2) Solpol 5050 (trade name; manufactured by Toho Chemical Co., Ltd.) 3 parts by weight (3) Solpol 5073 (trade name; Toho Chemical Industries, Ltd.) Product) 4 parts by weight (4) Compound of the present invention 60 parts by weight or more of (1) to (4) are mixed to obtain a wettable powder.

Formulation Example 4
(1) Compound of the present invention 4 parts by weight (2) bentonite 30 parts by weight (3) calcium carbonate 61.5 parts by weight (4) Toxanone GR-31A (trade name; manufactured by Sanyo Chemical Industries, Ltd.) 3 parts by weight (5 ) Calcium lignin sulfonate 1.5 parts by weight Premixed (1), (2) and (3), mixed with (4), (5) and water, and extruded Grain. Thereafter, the granules are obtained by drying and sizing.

Formulation Example 5
(1) Compound of the present invention 30 parts by weight (2) Siegrite (trade name; manufactured by Siegrite Co., Ltd.) 60 parts by weight (3) New Calgen WG-1 (trade name; manufactured by Takemoto Yushi Co., Ltd.) 5 parts by weight (4) New Calgen FS-7 (trade name; manufactured by Takemoto Yushi Co., Ltd.) 5 parts by weight (1), (2) and (3) are mixed, passed through a pulverizer, and (4) is added. After kneading, extrusion granulation is performed. Thereafter, it is dried and sized to obtain a granulated wettable powder.

Formulation Example 6
(1) Compound of the present invention 28 parts by weight (2) Sopropol FL (trade name; manufactured by Rhone-Poulein) 2 parts by weight (3) Solpol 355 (trade name; manufactured by Toho Chemical Co., Ltd.) 1 part by weight (4) IP solvent 1620 (trade name; manufactured by Idemitsu Petrochemical Co., Ltd.) 32 parts by weight (5) ethylene glycol 6 parts by weight (6) water 31 parts by weight or more of components (1) to (6) are mixed and wet pulverized An aqueous suspension is obtained by pulverization using a machine (Dyno-Mill).

Claims (9)

Formula (I):

Wherein R ¹ is alkyl, R ² is a hydrogen atom or alkyl, R ³ is alkyl, R ⁴ is alkyl, R ⁵ is one alkoxy, one alkenyloxy or one alkynyl. Alkyl substituted with oxy; 1 alkoxy, 1 alkenyloxy or alkoxy optionally substituted with 1 alkynyloxy; alkenyloxy; alkynyloxy; or alkoxycarbonyl, R ⁶ is alkylsulfonyl, A is A benzoylpyrazole compound or a salt thereof, which is an alkylene which may be substituted with one or more alkyls. The benzoylpyrazole compound or a salt thereof according to claim 1, wherein in formula (I), R ² is a hydrogen atom, R ⁵ is alkoxy substituted with one alkoxy, and A is alkylene. In formula (I), R ¹ is ethyl, R ² is a hydrogen atom, R ³ is tertiary butyl, R ⁴ is methyl, R ⁵ is 2-methoxyethoxy, and R ⁶ is The benzoylpyrazole compound or a salt thereof according to claim 1, which is methylsulfonyl and A is methylene. The benzoylpyrazole-type compound or its salt of Claim 1 whose R < ⁵ > is alkoxy in Formula (I). Formula (II):

(Wherein, R ¹ is alkyl, R ² is a hydrogen atom or an alkyl, R ⁴ is alkyl, R ⁵ is substituted by one alkoxy, one alkenyloxy or one alkynyloxy; 1 alkoxy, 1 alkenyloxy or 1 alkynyloxy substituted alkoxy; alkenyloxy; alkynyloxy; or alkoxycarbonyl, and R ⁶ is alkylsulfonyl). Formula (III):

Wherein R ³ is alkyl, Hal is halogen, and A is alkylene which may be substituted with one or two or more alkyls. Formula (I):

(Wherein R ¹ , R ² , R ³ , R ⁴ , R ⁵ , R ⁶ and A are as described above), or a method for producing a salt thereof. Formula (II):

Wherein R ¹ is alkyl, R ² is a hydrogen atom or alkyl, R ⁴ is alkyl, R ⁵ is alkyl substituted with one alkoxy, one alkenyloxy or one alkynyloxy; 1 alkoxy, 1 alkenyloxy or alkoxy optionally substituted by 1 alkynyloxy; alkenyloxy; alkynyloxy; or alkoxycarbonyl, R ⁶ is alkylsulfonyl) Its salt.   The benzoylpyrazole compound of formula (II) is (5-hydroxy-1-methyl-1H-pyrazol-4-yl) (2-methyl-4- (methylsulfonyl) -3-normalpropoxyphenyl) ketone, (3 -Normalbutoxy-2-methyl-4- (methylsulfonyl) phenyl) (5-hydroxy-1-methyl-1H-pyrazol-4-yl) ketone or (5-hydroxy-1-methyl-1H-pyrazol-4- The benzoylpyrazole compound or a salt thereof according to claim 6, which is yl) (3-isobutoxy-2-methyl-4- (methylsulfonyl) phenyl) ketone.   A herbicide containing the benzoylpyrazole compound according to claim 1, 2, 3, 4, 6, or 7 or a salt thereof as an active ingredient.   A herbicidally effective amount of the benzoylpyrazole compound or salt thereof according to claim 1, 2, 3, 4, 6, or 7 is applied to an undesirable plant or a place where it grows to control or inhibit the growth of the undesirable plant. how to.