CN108586357B

CN108586357B - Substituted pyrimidineformyl oxime derivatives, preparation method thereof, herbicidal composition and application

Info

Publication number: CN108586357B
Application number: CN201810729510.0A
Authority: CN
Inventors: 连磊; 张辽宁; 崔琦; 程传斌; 刘鹏
Original assignee: Qingdao Qing Yuan Compound Co Ltd
Current assignee: Qingdao Qing Yuan Compound Co Ltd
Priority date: 2018-07-05
Filing date: 2018-07-05
Publication date: 2020-01-21
Anticipated expiration: 2038-07-05
Also published as: CN108586357A; AU2018430945B2; WO2020006869A1; AU2018430945A1

Abstract

The invention belongs to the technical field of pesticides, and particularly relates to a substituted pyrimidine formyl oxime derivative, a preparation method thereof, a weeding composition and application. A substituted pyrimidineformyl oxime derivative represented by general formula I:

，R₁and R₂Independently represent H, halogen, cyano, nitro, alkyl, etc.; x represents an alkyl group, an alkoxy group or the like; y represents nitro or NR₃R₄(ii) a A represents halogen and amino; b represents hydrogen, halogen, alkoxy, alkylthio, alkylamino or dialkylamino which may or may not be substituted by halogen; c represents halogen and halogenated alkyl. The compound has excellent herbicidal activity and higher crop safety, and especially establishes good selectivity for corn, rice and other key crops.

Description

Substituted pyrimidineformyl oxime derivatives, preparation method thereof, herbicidal composition and application

Technical Field

The invention belongs to the technical field of pesticides, and particularly relates to a substituted pyrimidine formyl oxime derivative, a preparation method thereof, a weeding composition and application.

Background

The control of weeds is a crucial step in the realization of efficient agricultural processes, despite the variety of herbicides on the market, for example WO2005/063721a1, WO2007/082076a1, US7863220B2, US7300907B2, US7642220B2 and US7786044B2 disclose certain 6-amino-2-substituted-pyrimidine-4-carboxylic acids and derivatives thereof and their use as herbicides. However, due to the expanding market, the resistance of weeds, the life span of the drugs, and the economic nature of the drugs, and the growing environmental importance, scientists are required to research and develop new herbicide varieties with high efficiency, safety, economy, and different modes of action.

Disclosure of Invention

The invention provides a substituted pyrimidyl formyl oxime derivative, a preparation method thereof, a weeding composition and application thereof.

The technical scheme adopted by the invention is as follows:

a substituted pyrimidineformyl oxime derivative represented by general formula I:

wherein the content of the first and second substances,

R₁and R₂Independently represents H, halogen, cyano, nitro, alkyl, haloalkyl, alkenyl, cycloalkyl, alkoxy, acyloxy, alkylthio, unsubstituted or substituted aryl, benzyl, heteroaryl, aryloxy, arylthio, heteroaryloxy and heteroarylthio, and also has the formula-COR₅A group shown in the formula, wherein R₅Represents alkyl, haloalkyl, alkenyl, cycloalkyl, alkoxy, alkenyloxy, cycloalkoxy, alkylthio, alkenylthio, cycloalkylthio, unsubstituted or substituted benzyl, aryl, heteroaryl, aryloxy, heteroaryloxy, arylmethoxy, heteroarylmethoxy, benzylthio, arylthio, heteroarylthio and amino which may be substituted by alkyl, acyl, acyloxy, unsubstituted or substituted aryl, heteroaryl, arylalkyl, heteroarylalkyl; or R₁And R₂Are linked to form a 5-or 6-membered saturated or unsaturated ring;

x represents alkyl, alkoxy, alkylthio, halogen, alkenyl, alkynyl;

y represents nitro or NR₃R₄Wherein R is₃Represents H, optionally substituted by 1-2R₁₁Substituted alkyl, alkenyl or alkynyl, -COR₁₂Nitro, OR₁₃，SO₂R₁₄，NR₁₅R₁₆，N＝CR₁₇R₁₈An alkylcarbamoyl group, a dialkylcarbamoyl group, a trialkylsilyl group or a dialkylphosphono group; r₄Represents H, optionally substituted by 1-2R₁₁Substituted alkyl or-COR₁₂(ii) a Or NR₃R₄Represents N ═ CR₂₁NR₂₂R₂₃，N＝CR₂₄OR₂₅A 5-or 6-membered saturated or unsaturated ring which is unsubstituted or substituted by 1 to 2 groups independently selected from halogen, alkyl, alkoxy, haloalkoxy, alkylthio, haloalkylthio, amino, alkylamino, dialkylamino, alkoxycarbonyl, which ring contains no or no oxygen, sulfur or other nitrogen atom;

wherein R is₁₁Independently represent halogen, hydroxy, alkoxy, haloalkoxy, alkylthio, haloalkylthio, amino, alkylamino, dialkylamino, alkoxycarbonyl, unsubstituted or substituted aryl, heteroaryl;

R₁₂represents H, alkyl, haloalkyl, alkoxy, phenyl, phenoxy or benzyloxy;

R₁₃represents H, alkyl, haloalkyl, phenyl, benzyl or CHR₃₁C(O)OR₃₂；R₃₁Represents H, alkyl or alkoxy; r₃₂Represents H, alkyl or benzyl;

R₁₄represents alkyl, haloalkyl;

R₁₅represents H, alkyl, formyl, alkanoyl, haloalkylacyl, alkoxycarbonyl, phenylcarbonyl, phenoxycarbonyl or benzyloxycarbonyl; r₁₆Represents H, alkyl;

R₁₇represents H, alkyl, phenyl which is unsubstituted or substituted by 1 to 3 groups of halogen, alkyl and alkoxy; r₁₈Represents H, alkyl; or N ═ CR₁₇R₁₈Represents

R₂₁、R₂₄Each independently represents H or alkyl;

R₂₂、R₂₃each independently represents H or alkyl; or NR₂₂R₂₃Represents a 5-or 6-membered saturated or unsaturated ring which contains no or no oxygen, sulfur or other nitrogen atoms;

R₂₅represents an alkyl group;

a represents halogen and amino;

b represents hydrogen, halogen, alkoxy, alkylthio, alkylamino or dialkylamino which may or may not be substituted by halogen;

c represents halogen and halogenated alkyl.

Preferably, R₁And R₂Independently represent H, cyano, C1-C8 alkyl, halogeno C1-C8 alkyl, C2-C8 alkenyl, C3-C8 cycloalkyl, C1-C8 alkoxy, C1-C8 acyloxy, C1-C8 alkylthio, unsubstituted or substituted aryl, benzyl, heteroaryl, aryloxy, arylthio, heteroaryloxy and heteroarylthio, and also of the formula-COR₅A group shown in the formula, wherein R₅Represents C1-C8 alkyl, halogenated C1-C8 alkyl, C2-C8 alkenyl, C3-C8 cycloalkyl, C1-C8 alkoxy, C2-C8 alkenyloxy, C3-C8 cycloalkoxy, C1-C8 alkylthio, C2-C8 alkenylthio, C3-C8 cycloalkylthio, unsubstituted or substituted benzyl, aryl, heteroaryl, aryloxy, heteroaryloxy, arylmethoxy, heteroarylmethoxy, benzylthio, arylthio, heteroarylthio and amino which may be substituted by C1-C8 alkyl, C1-C8 acyl, C1-C8 acyloxy, unsubstituted or substituted aryl, heteroaryl, arylC 1-C8 alkyl, heteroarylC 1-C8 alkyl; wherein said "substituted" is selected from the group consisting of halogen, cyano, nitro, C1-C8 alkyl, halo C1-C8 alkyl, C3-C8 cycloalkyl, C1-C8 alkoxy, C2-C8 alkeneOxy, C1-C8 alkylthio, aryl, aryloxy, benzyl, benzyloxy, C1-C8 acyl, C1-C8 acyloxy, C2-C8 alkenyl, and amino which may be substituted with one or more of C1-C8 alkyl, aryl, aryloxy, C1-C8 acyl, C1-C8 acyloxy, and C2-C8 alkenyl;

x represents C1-C8 alkyl, C1-C8 alkoxy, C1-C8 alkylthio, halogen, C2-C8 alkenyl, C2-C8 alkynyl;

y represents nitro or NR₃R₄Wherein R is₃Represents H, optionally substituted by 1-2R₁₁Substituted C1-C8 alkyl, C2-C8 alkenyl or C2-C8 alkynyl, -COR₁₂Nitro, OR₁₃，SO₂R₁₄，NR₁₅R₁₆，N＝CR₁₇R₁₈C1-C8 alkylcarbamoyl, di-C1-C8 alkylcarbamoyl, tri-C1-C8 alkylsilyl or di-C1-C8 alkylphosphonyl; r₄Represents H, optionally substituted by 1-2R₁₁Substituted C1-C8 alkyl or-COR₁₂(ii) a Or NR₃R₄Represents N ═ CR₂₁NR₂₂R₂₃，N＝CR₂₄OR₂₅Unsubstituted or substituted by 1 to 2 radicals independently selected from halogen, C1-C8 alkyl, C1-C8 alkoxy, halogenated C1-C8 alkoxy, C1-C8 alkylthio, halogenated C1-C8 alkylthio, amino, C1-C8 alkylamino, di-C1-C8 alkylamino, C1-C8 alkoxycarbonyl

Wherein R is₁₁Independently represent halogen, hydroxy, C1-C8 alkoxy, halogenated C1-C8 alkoxy, C1-C8 alkylthio, halogenated C1-C8 alkylthio, amino, C1-C8 alkylamino, di-C1-C8 alkylamino, C1-C8 alkoxycarbonyl, phenyl, naphthyl, unsubstituted or substituted by 1-3 of halogen, C1-C8 alkyl, C1-C8 alkoxy and nitro,

R₁₂Represents H, C1-C18 alkyl, halogenated C1-C8 alkyl, C1-C8 alkoxy, phenyl, phenoxy or benzyloxy;

R₁₃represents H, C1-C8 alkyl, halogeno-C1-C8 alkyl, phenyl, benzyl or CHR₃₁C(O)OR₃₂；R₃₁Represents H, C1-C8 alkyl or C1-C8 alkoxy; r₃₂Represents H, C1-C8 alkyl or benzyl;

R₁₄represents C1-C8 alkyl, halogenated C1-C8 alkyl;

R₁₅represents H, C1-C8 alkyl, formyl, C1-C8 alkanoyl, halogeno-C1-C8 alkanoyl, C1-C8 alkoxycarbonyl, phenylcarbonyl, phenoxycarbonyl or benzyloxycarbonyl; r₁₆Represents H, C1-C8 alkyl;

R₁₇represents H, C1-C8 alkyl, phenyl which is unsubstituted or substituted by 1-3 of halogen, C1-C8 alkyl and C1-C8 alkoxy; r₁₈Represents H, C1-C8 alkyl; or N ═ CR₁₇R₁₈Represents

R₂₁、R₂₄Each independently represents H or C1-C8 alkyl;

R₂₂、R₂₃each independently represents H or C1-C8 alkyl; or NR₂₂R₂₃Represents

R₂₅Represents a C1-C8 alkyl group;

a represents halogen and amino;

b represents hydrogen, halogen, C1-C8 alkoxy, C1-C8 alkylthio, C1-C8 alkylamino, di-C1-C8 alkylamino, with or without halogen substitution;

c represents halogen, halogenated C1-C8 alkyl.

In the definitions of the compounds of the general formula given above, the terms used are collectively defined as follows:

the R is₁And R₂The aryl group in the group preferably includes phenyl, 2, 3-indanyl, naphthyl or the like; the heteroaryl group includes 5-to 10-membered heteroaryl groups containing 1 to 3O, S, N heteroatoms, such as pyridyl, pyrimidinyl, pyrazinyl, furyl, thienyl, pyrrolyl, pyrazolyl, thiazolyl, oxazolyl, isoxazolyl, imidazolyl, triazolyl, oxadiazolyl, thiadiazolyl, pyridazinyl, triazinyl, quinolyl, quinoxalyl, indolyl, benzotriazolyl, benzothienyl, benzofuryl, isoquinolyl, tetrahydroquinolyl and the like.

More preferably, R₁And R₂Independently represent hydrogen, C1-C6 alkyl, C1-C6 alkoxy, C1-C6 alkylthio, cyano, C1-C6 alkoxycarbonyl, and phenyl which is unsubstituted or substituted by one or more groups selected from halogen, halogeno C1-C6 alkyl, C1-C6 alkyl, C1-C6 alkoxy and C2-C6 alkenyl;

x represents C1-C6 alkyl, C1-C6 alkoxy, C1-C6 alkylthio, halogen, C2-C6 alkenyl, C2-C6 alkynyl;

y represents nitro or NR₃R₄Wherein R is₃Represents H, optionally substituted by 1-2R₁₁Substituted C1-C6 alkyl, C2-C6 alkenyl or C2-C6 alkynyl, -COR₁₂Nitro, OR₁₃，SO₂R₁₄，NR₁₅R₁₆，N＝CR₁₇R₁₈C1-C6 alkylcarbamoyl, di-C1-C6 alkylcarbamoyl, tri-C1-C6 alkylsilyl or di-C1-C6 alkylphosphonyl; r₄Represents H, optionally substituted by 1-2R₁₁Substituted C1-C6 alkyl or-COR₁₂(ii) a Or NR₃R₄Represents N ═ CR₂₁NR₂₂R₂₃，N＝CR₂₄OR₂₅Unsubstituted or substituted by 1 to 2 radicals independently selected from halogen, C1-C6 alkyl, C1-C6 alkoxy, halogenated C1-C6 alkoxy, C1-C6 alkylthio, halogenated C1-C6 alkylthio, amino, C1-C6 alkylamino, di-C1-C6 alkylamino, C1-C6 alkoxycarbonyl

Wherein R is₁₁Independently represent halogen, hydroxy, C1-C6 alkoxy, halogenated C1-C6 alkoxy, C1-C6 alkylthio, halogenated C1-C6 alkylthio, amino, C1-C6 alkylamino, di-C1-C6 alkylamino, C1-C6 alkoxycarbonyl, phenyl, naphthyl, unsubstituted or substituted by 1-3 of halogen, C1-C6 alkyl, C1-C6 alkoxy and nitro,

R₁₂Represents H, C1-C14 alkyl, halogenated C1-C6 alkyl, C1-C6 alkoxy, phenyl, phenoxy or benzyloxy;

R₁₃represents H, C1-C6 alkyl, halogeno-C1-C6 alkyl, phenyl, benzyl or CHR₃₁C(O)OR₃₂；R₃₁Represents H, C1-C6 alkyl or C1-C6 alkoxy; r₃₂Represents H, C1-C6 alkyl or benzyl;

R₁₄represents C1-C6 alkyl, halogenated C1-C6 alkyl;

R₁₅represents H, C1-C6 alkyl, formyl, C1-C6 alkanoyl, halogeno-C1-C6 alkanoyl, C1-C6 alkoxycarbonyl, phenylcarbonyl, phenoxycarbonyl or benzyloxycarbonyl; r₁₆Represents H, C1-C6 alkyl;

R₁₇represents H, C1-C6 alkyl, phenyl which is unsubstituted or substituted by 1-3 of halogen, C1-C6 alkyl and C1-C6 alkoxy; r₁₈Represents H, C1-C6 alkyl; or N ═ CR₁₇R₁₈Represents

R₂₁、R₂₄Each independently represents H or C1-C6 alkyl;

R₂₂、R₂₃each independently represents H or C1-C6 alkyl; or NR₂₂R₂₃Represents

R₂₅Represents a C1-C6 alkyl group;

a represents halogen and amino;

b represents hydrogen, halogen, C1-C6 alkoxy, C1-C6 alkylthio, C1-C6 alkylamino, di-C1-C6 alkylamino, with or without halogen substitution;

c represents halogen, halogenated C1-C6 alkyl.

More preferably, R₁And R₂Independently represent hydrogen, C1-C4 alkyl, C1-C4 alkoxy, C1-C4 alkylthio, cyano, C1-C4 alkoxycarbonyl, and phenyl which is unsubstituted or substituted by one or more groups selected from halogen, halogeno C1-C4 alkyl, C1-C4 alkyl, C1-C4 alkoxy and C2-C4 alkenyl;

x represents C1-C4 alkyl, C1-C4 alkoxy, C1-C4 alkylthio, halogen, C2-C4 alkenyl, C2-C4 alkynyl;

y represents nitro or NR₃R₄Wherein R is₃Represents H, optionally substituted by 1-2R₁₁Substituted C1-C4 alkyl, C2-C4 alkenyl or C2-C4 alkynyl, -COR₁₂Nitro, OR₁₃，SO₂R₁₄，NR₁₅R₁₆，N＝CR₁₇R₁₈C1-C4 alkylcarbamoyl, di-C1-C4 alkylcarbamoyl, tri-C1-C4 alkylsilyl or di-C1-C4 alkylphosphonyl; r₄Represents H, optionally substituted by 1-2R₁₁Substituted C1-C4 alkyl or-COR₁₂(ii) a Or NR₃R₄Represents N ═ CR₂₁NR₂₂R₂₃，N＝CR₂₄OR₂₅Unsubstituted or substituted by 1 to 2 radicals independently selected from halogen, C1-C4 alkyl, C1-C4 alkoxy, halogenated C1-C4 alkoxy, C1-C4 alkylthio, halogenated C1-C4 alkylthio, amino, C1-C4 alkylamino, di-C1-C4 alkylamino, C1-C4 alkoxycarbonyl

Wherein R is₁₁Independently represent halogen, hydroxy, C1-C4 alkoxy, halogenated C1-C4 alkoxy, C1-C4 alkylthio, halogenated C1-C4 alkylthio, amino, C1-C4 alkylamino, di-C1-C4 alkylamino, C1-C4 alkoxycarbonyl, phenyl, naphthyl, unsubstituted or substituted by 1-3 of halogen, C1-C4 alkyl, C1-C4 alkoxy and nitro,

R₁₂Represents H, C1-C8 alkyl, halogenated C1-C4 alkyl, C1-C4 alkoxy, phenyl, phenoxy or benzyloxy;

R₁₃represents H, C1-C4 alkyl, halogeno-C1-C4 alkyl, phenyl, benzyl or CHR₃₁C(O)OR₃₂；R₃₁Represents H, C1-C4 alkyl or C1-C4 alkoxy; r₃₂Represents H, C1-C4 alkyl or benzyl;

R₁₄represents C1-C4 alkyl, halogenated C1-C4 alkyl;

R₁₅represents H, C1-C4 alkyl, formyl, C1-C4 alkanoyl, halogeno-C1-C4 alkanoyl, C1-C4 alkoxycarbonyl, phenylcarbonyl, phenoxycarbonyl or benzyloxycarbonyl; r₁₆Represents H, C1-C4 alkyl;

R₁₇represents H, C1-C4 alkyl, phenyl which is unsubstituted or substituted by 1-3 of halogen, C1-C4 alkyl and C1-C4 alkoxy; r₁₈Represents H, C1-C4 alkyl; or N ═ CR₁₇R₁₈Represents

R₂₁、R₂₄Each independently represents H or C1-C4 alkyl;

R₂₂、R₂₃each independently represents H or C1-C4 alkyl;or NR₂₂R₂₃Represents

R₂₅Represents a C1-C4 alkyl group;

a represents halogen and amino;

b represents hydrogen, halogen, C1-C4 alkoxy, C1-C4 alkylthio, C1-C4 alkylamino, di-C1-C4 alkylamino, with or without halogen substitution;

c represents halogen, halogenated C1-C4 alkyl.

Further preferably, R₁And R₂Independently represent hydrogen, methyl, ethyl, propyl, isopropyl, n-butyl, tert-butyl, cyclopropyl, methylthio, ethylthio, cyano, methoxycarbonyl, ethoxycarbonyl, and optionally are selected from halogen, CF₃Phenyl substituted with one or more of methyl, ethyl, propyl, isopropyl, n-butyl, tert-butyl, cyclopropyl, methoxy and ethoxy;

x represents chlorine, bromine, methoxy, ethoxy, methylthio, ethylthio, methyl, ethyl, propyl, isopropyl, n-butyl and tert-butyl;

y represents NH₂、NHMe、N(Me)₂、

A represents fluorine, chlorine, amino;

b represents hydrogen, fluorine, chlorine, methoxy, ethoxy, methylthio with or without fluorine;

c represents fluorine, chlorine and trifluoromethyl.

The preparation method of the substituted pyrimidineformyl oxime derivative comprises the following steps:

the compound shown in the general formula I is prepared by reacting the compound shown in the general formula II with the compound shown in the general formula III, wherein the reaction equation is as follows:

the reaction is carried out in an aprotic solvent under the action of a base and a condensing agent.

The reaction temperature is 0 ℃ to 90 ℃, preferably 25 ℃ to 30 ℃.

The solvent is one or more mixed solvents selected from dichloromethane, dichloroethane, acetonitrile, N-dimethylformamide, N-dimethylacetamide, dimethyl sulfoxide, tetrahydrofuran, toluene and xylene.

The alkali is selected from one or more of organic alkali such as triethylamine, trimethylamine, DIPEA, DBU and the like.

The condensing agent is PyBop, HATU or HOBt-EDCI.

A herbicidal composition comprising a herbicidally effective amount of at least one of said substituted pyrimidineformyl oxime derivatives.

The herbicide composition also comprises a preparation auxiliary agent.

A method for controlling harmful plants, which comprises applying a herbicidally effective amount of at least one of said substituted pyrimidinylcarboxyloxime derivatives or said herbicidal composition on plants or in the area of harmful plants.

The use of at least one of said substituted pyrimidineformyl oxime derivatives or said herbicidal composition for controlling harmful plants.

Preferably, the substituted pyrimidineformyl oxime derivatives are used for controlling harmful plants in crops of useful plants.

More preferably, the useful crop is a transgenic crop or a crop treated with genome editing techniques.

The compounds of the formula I according to the invention have outstanding herbicidal activity against a large number of economically important monocotyledonous and dicotyledonous harmful plants. The active substances according to the invention are also effective against perennial weeds which grow from rhizomes, or other perennial organs and are difficult to control. In this connection, it is generally immaterial whether the substance is used before sowing, before germination or after germination. Mention is made in particular of representative examples of the monocotyledonous and dicotyledonous weed groups which the compounds of the invention can control, without being restricted to a defined species. Examples of weed species for which the active substance acts effectively include monocotyledons: annual avena, rye, grass, alopecurus, farris, barnyard grass, digitaria, setaria and sedge, and perennial agropyron, bermudagrass, cogongrass and sorghum, and perennial sedge.

With regard to dicotyledonous weed species, the action can be extended to species such as the annual cleavers, viola, veronica, picea, chickweed, amaranthus, sinapis, ipomoea, sida, matricaria and abutilon species, and the perennial weeds cyclocarya, thistle, sorrel and artemisia. The active substances according to the invention are effective in controlling harmful plants, such as barnyard grass, sagittaria, alisma, eleocharis, saccharum and cyperus, in this particular condition of sowing of rice. If the compounds of the present invention are applied to the soil surface before germination, seedlings of weeds can be completely prevented before the weeds grow out, or the weeds stop growing when they grow out of cotyledons and finally die completely after three to four weeks. The compounds of the invention are particularly active against plants such as, for example, alpinia, sesamum indicum, polygonum convolvulus, chickweed, veronica vinifera, veronica albo, viola tricolor and amaranth, cleavers and kochia.

Although the compounds of the invention have excellent herbicidal activity against monocotyledonous and dicotyledonous weeds, they are not at all harmful or only insignificantly harmful to the important economic crop plants, such as wheat, barley, rye, rice, maize, sugar beet, cotton and soybean. Especially good compatibility with cereal crops such as wheat, barley and maize, especially wheat. The compounds according to the invention are therefore very suitable for selectively controlling unwanted vegetation in agricultural crops or ornamental plants.

Due to their herbicidal properties, these active substances can be used for controlling harmful plants in the cultivation of genetically engineered plants which are known or are to occur. Transgenic plants often have advantageous traits, such as resistance to specific insecticides, particularly to specific herbicides, resistance to plant diseases or to microorganisms pathogenic to plant diseases, such as specific insects or microorganisms of fungi, bacteria or viruses. Other specific traits are related to the conditions of the product, such as quantity, quality, storage stability, composition and specific ingredients. Thus, it is known that the resulting transgenic plant products have an increased starch content or an improved starch quality or a different fatty acid composition.

The compounds of the formula I according to the invention or their salts are preferably used for economically important transgenic crops and ornamentals, for example cereals, such as wheat, barley, rye, oats, millet, rice, cassava and maize, or for the cultivation of sugar beet, cotton, soybean, rapeseed, potato, tomato, pea and other vegetable plants. The compounds of the formula I are preferably used as herbicides for cultivating useful plants which are resistant to the action of the herbicide or which are resistant to the toxic action of the herbicide by genetic engineering.

Conventional methods for breeding plants having improved shape over known plants include, for example, conventional mating methods and mutant breeding. In other words, new plants with improved traits may be obtained by means of methods of genetic engineering (see, for example, EP-0221044A, EP-0131624A). For example, several methods have been described:

to improve starch synthesis in plants, crop plants are modified by genetic engineering (e.g. WO 92/11376, WO92/14827, WO 91/19806);

transgenic crop plants which are resistant to particular herbicides, to glufosinate herbicides (e.g. EP-0242236A, EP-0242246A) or to glyphosate-type herbicides (WO 92/00377), or to sulfonylurea-type herbicides (EP-0257993A, US-5013659A);

transgenic crop plants, such as cotton, which produce Bacillus thuringiensis toxins (Bt toxins) which protect against attack on plants by specific pests (EP-0142924A, EP-0193259A);

-transgenic crop plants with improved fatty acid composition (WO 91/13972).

A number of molecular biotechnologies are known which enable the production of transgenic plants with improved traits (see, for example, Sambrook et al, 1989, molecular amplification, second edition of the laboratory Manual, Cold spring harbor laboratory publications in USA, Cold spring harbor, New York; or Winnacker "Gene und Klone" [ genes and clones ], VCH Weinheim, second edition 1996 or Christou, "trends in plant science" 1(1996)423- "431)). In order to carry out the manipulation of genetic engineering, it is possible to introduce nucleic acid molecules into plasmids, which undergo mutations or sequence changes by recombination of DNA sequences. Using standard methods as described above, it is possible, for example, to exchange substrates, remove partial sequences or add natural or synthetic sequences. In order to ligate the DNA fragments to each other, it is possible to attach a binder or a linker to the fragments.

Plant cells of reduced activity gene products can be prepared, for example, by expressing at least one suitable antisense-RNA, sense-RNA to achieve a cosuppression effect, or by expressing at least one suitably configured ribozyme which specifically cleaves transcripts of the gene products.

For this purpose, it is possible to use DNA molecules which contain the entire coding sequence of the gene product, including any flanking sequences which may be present, and to use DNA molecules which contain only a part of the coding sequence which has to be long enough to achieve an antisense effect in the cell. Sequences that are highly homologous but not identical to the coding sequence of the gene product may also be used.

When expressing the nucleic acid molecule in a plant, the synthetic protein can be localized in any desired plant cell compartment. However, for localization in a specific chamber, it is possible, for example, to link the coding region to a DNA sequence in order to ensure localization in a specific location. These sequences are known to those skilled in the art (see, for example, Braun et al, EMBO J.11(1992) 3219-3227; Wolter et al, Proc. Natl. Acad. Sci. USA 85(1988), 846-850; Sonnewald et al Plant J.1(1991), 95-106).

Transgenic plant cells can be recombined into whole plants using known techniques. The transgenic plant may be of any desired plant variety, i.e., monocotyledonous and dicotyledonous plants. In this way, it is possible to obtain transgenic plants with improved traits by overexpressing, inhibiting or suppressing homologous (═ natural) genes or gene sequences, or by expressing heterologous (═ external) genes or gene sequences.

When the active substances according to the invention are used on transgenic crops, in addition to the harmful-plant-inhibiting effects observed on other crops, special effects are often observed on the corresponding transgenic crops, for example an improved or enlarged spectrum of weed control, improved application rates in the application, preferably a good combination of resistance of the transgenic crop and herbicide performance, and an influence on the growth and yield of the transgenic crop plants. The invention therefore also provides for the use of the compounds as herbicides for controlling harmful plants in transgenic crop plants.

In addition, the compound of the invention can obviously regulate the growth of crop plants. These compounds are used to target the control of plant components and to promote harvesting, such as desiccation and stunting of plants, by regulating the metabolism of plants involved. They are also suitable for regulating and inhibiting undesirable vegetation without destroying the growth of the crop plants. Inhibiting plant growth plays a very important role in many monocotyledonous and dicotyledonous crop plants, since this reduces or completely prevents lodging.

The compounds of the present invention may be applied using a general formulation, wettable powders, concentrated emulsions, sprayable solutions, powders or granules may be used, so the present invention also provides herbicidal compositions comprising compounds of formula I. depending on the general biological and/or chemical physical parameters, the compounds of formula I may be formulated in a variety of ways. examples of suitable formulation choices are Wettable Powders (WP), water Soluble Powders (SP), water soluble concentrates, concentrated Emulsions (EC), emulsions such as oil dispersed in water and water dispersed in oil (EW), sprayable solutions, Suspension Concentrates (SC), dispersible oil suspensions (OD), suspensions with oil or water as diluents, miscible oil solutions, powders (DP), Capsule Suspensions (CS), core encapsulated (casing) compositions, granules for broadcasting and soil application, Spray granules, coated granules and absorbent granules, water dispersible granules (WG), water Soluble Granules (SG), water soluble granules (formula), microcapsules and wax preparations, these individual formulations are known in the literature, published as "mineral, published under" market, 9, published ", published by" company.

The necessary formulation auxiliaries, such as inerts, surfactants, solvents and other additives, are likewise known and are described in the documents mentioned below, for example in Watkins, "handbook of powdered diluents pesticides and carriers", second edition, Darland book Caldwell n.j.; h.v.01phen, "entry to clay colloid chemistry," second edition, j.wiley and Sons, n.y.; marsden, second edition "solvent guide", Interscience, n.y.1963; "annual report of detergents and emulsifiers" by McCutcheon, MC issues, Ridgewood n.j.; sisley and Wood, "surfactant encyclopedia", chemical publishing company, n.y.1964;

is/are as follows

[ ethylene oxide adduct surfactant]"Chemische Technologie" of Wiss.Verlagagesell.Stuttgart 1976, Winnacker-K ü chler [ chemical Process]Volume 7, c.hauser Verlag Munich, 4 th edition 1986.

Wettable powders can be uniformly dispersed in water and, in addition to the active substance, include diluents or inert substances, ionic and nonionic surfactants (wetting agents, dispersants), such as polyethoxylated alkylphenols, polyethoxylated fatty alcohols, polyoxyethylated fatty amines, fatty alcohol polyglycol ether sulfates, alkylsulfonates, alkylphenylsulfonates, sodium lignosulfonates, sodium 2,2 '-dinaphthylmethane-6, 6' -disulfonate, sodium dibutylnaphthalenesulfonate or sodium oleoylmethyltaurate. To prepare wettable powders, the active substances of the herbicides are finely ground, for example using customary instruments, such as hammer mills, fan mills and jet mills, with simultaneous or sequential incorporation of the adjuvants.

Emulsions are prepared by dissolving the active substance in an organic solvent, such as butanol, cyclohexanone, dimethylformamide, xylene or higher boiling aromatics or hydrocarbons or mixtures of solvents, and adding one or more ionic and/or nonionic surfactants (emulsifiers). Examples of emulsifiers which may be used are calcium alkylarylsulfonates, for example calcium dodecylbenzenesulfonate, or nonionic emulsifiers, for example polyglycol esters of fatty acids, alkylarylpolyglycol ethers, fatty alcohol polyglycol ethers, propylene oxide-ethylene oxide condensation products, alkyl polyethers, sorbitan esters, for example sorbitan fatty acid esters, or polyoxyethylene sorbitan esters, for example polyoxyethylene sorbitan fatty acid esters.

The active substance and finely divided solid substances, for example talc, natural clays such as kaolin, bentonite and pyrophyllite, or diatomaceous earth, are ground to give a powder. Water or oil based suspensions may be prepared, for example, by wet milling using a commercially available bead mill, with or without the addition of a surfactant of the other formulation type described above.

For preparing emulsions, for example oil-in-water Emulsions (EW), it is possible to use aqueous organic solvents, using stirrers, colloid mills and/or static mixers, and, if desired, to add surfactants of another formulation type as described above.

Granules are prepared by spraying the active substance onto the adsorbate, granulating with inert material, or concentrating the active substance onto the surface of a carrier, for example sand, kaolinite, and granulating the inert material with a binder, for example polyvinyl alcohol, sodium polyacrylate or mineral oil. Suitable active substances can be granulated by the process for preparing fertilizer granules, if desired mixed with fertilizers. The preparation of water-suspendable granules is carried out by customary methods, for example spray-drying, fluidized-bed granulation, millstone granulation, mixing using high-speed mixers and extrusion without solid inert materials.

For the preparation of granules using a millstone, a fluidized bed, an extruder and Spray coating, see the following processes, for example "Spray Drying handbook", third edition 1979, g.goodwin ltd, london; browning, "Agglomeration", chemical and engineering 1967, page 147 ff; "Perry's handbook of Engineers of chemistry", fifth edition, McGraw-Hill, New York 1973, pages 8-57. If preparations for crop protection products are to be known, see, for example, G.C. Klingman, "Weed Control as a Science", John Wiley and Sons, New York, pages 196181-96 and J.D. Freyer, S.A. Evans "Weed Control Manual", fifth edition, Blackwell scientific rules, Oxford university 1968, page 101-.

Agrochemical formulations generally comprise from 0.1 to 99%, in particular from 0.1 to 95% by weight of active substance of formula I. The concentration of active substance in wettable powders is, for example, from about 10 to 99% by weight, with usual formulation components making up the remainder to 100% by weight. The concentration of the active substance in the emulsion concentrate may be about 1 to 90%, preferably 5 to 80% by weight. Powder formulations contain from 1 to 30% by weight of active, usually preferably from 5 to 20% by weight of active, whereas sprayable solutions contain from about 0.05 to 80%, preferably from 2 to 50% by weight of active. The content of active substance in the aqueous suspension granules depends primarily on whether the active substance is liquid or solid, and the auxiliaries, fillers and the like used in granulation. The content of active substance in the water-suspendable granule formulation is, for example, between 1 and 95% by weight, preferably between 10 and 80% by weight.

The active substance formulations mentioned may additionally comprise tackifiers, wetting agents, dispersants, emulsifiers, penetrants, preservatives, antifreezes, solvents, fillers, carriers, colorants, antifoams, evaporation inhibitors and generally customary pH and viscosity regulators in all cases.

On the basis of these formulations, it is also possible to mix them with other insecticide active substances, such as insecticides, acaricides, herbicides and fungicides, and also with safeners, fertilizers and/or plant growth regulators, either premixed or mixed in containers.

Suitable active substances which can be mixed with the active substances according to the invention in a compounded or tank-mixed formulation are, for example, the substances known from "the world Wide Specification of New agricultural chemical products", from the national agricultural science and technology Press, 2010.9 and the documents cited therein. For example, the herbicidal active substances mentioned below may be mixed with the mixtures of the formula I (remarks: name of the compound, either by common name according to the International organization for standardization (ISO), or by chemical name, where appropriate with a code number): acetochlor, butachlor, alachlor, propisochlor, metolachlor, s-metolachlor, pretilachlor, propyzamide, pretilachlor, napropamide, R-levulinyl-propyzamide, propanil, mefenacet, dibenzamide, diflufenican, flumetsulam, bromobutyrolac, dimethenamid, mefenacet, metazachlor, isoxaflutole, ryegrass methyl ester, loflutolane, diacrylamide, pethoxamide, butachlor, propisochlor, cyprosulfamide, flumetsulam, heptanoyl, isobutramine, propyzamide, terbutamid, dimethenamid, larvamide, trimethylcyclam, clofenamid, propyzamide, penoxulamide, carpronide, diflormid, trinitrol, butachlor, butafenacet, butachlor, benfluralin, bencarbzamide, pencyhalonil, metolachlor, bencarbzamide, pencyhalonil, buta, Grazing amine, bensulfuron, quinoxalamine, bensulfuron-methyl, naproxen, acetochlor, naphazel, thiachlor, pyraflufen, bensulfuron-methyl, prochloraz, clofenamide, butamidam, flupiram, atrazine, simazine, prometryn, cyanazine, simetryn, ametryn, prometryn, ipratron, flurazin, terbutryn, triazineone-flumetsulam, ciprofloxacin, glycazine, pradapazine, prometryn, simatong, azidezin, diuron, isopentetryn, cycloprozine, ametryn, terbuthylazine, terbuton, metocloprid, cyanazine, bentazon, clonazine, atrazine, metribuzin, cyanuric acid, indaziflazaflam, chlorsulfuron, meturon, bensulfuron, chlorimuron, tribenuron-methyl, thifensulfuron-methyl, pyrazosulfuron-methyl, sulfosulfuron-methyl, sulfometuron, Cinosulfuron, triasulfuron, sulfometuron-methyl, nicosulfuron, ethametsulfuron, amidosulfuron, ethoxysulfuron, cyclosulfamuron, rimsulfuron, azimsulfuron, primisulfuron-methyl, flusulfuron-methyl, flupyrsulfuron-methyl, epoxysulfuron, imazosulfuron, primisulfuron-methyl, prosulfuron, sulfosulfuron, trifloxysulfuron, triflusulfuron, metsulfuron-methyl sodium, flupyrazosulfuron, methisulfuron-methyl, primisulfuron, propysilfuron (Propyrisulfuron), metribusulfuron, acifluorfen-methyl, fomesafen, lactofen, fluoroglycofen-ethyl, oxyfen, prosulfuron, benfuresafen, trifloxysulfuron, metofen-ethyl, metofen, trifloxysulfuron, fluroxypyr, fluridone, benfop, benfluridone, benfurazolin, benfluridone, benfurbenflur, Dimethofen, oxyfluorfen, clofenflurate, Halosafen, chlortoluron, isoproturon, linuron, diuron, sifenuron, fluometuron, benzthiauron, methabenzuron, prosulfuron, sulfosulfuron, clomauron, clodinafuron, clofensulfuron, metoxuron, bromuron, metoxuron, meturon, fensulfuron, prosulfuron, subtilon, cuarone, metolachlor, cycloaroron, cyclouron, thifluuron, buthiuron, kuron, cumuron, metoxuron, methamidothion, metominosulfuron, trifolium, isoxafluron, isoxauron, moneuronon, aniron, methicuron, chloretron, clotururon, teuron, benuron, pennison, phenmedibensulfuron, bensulfuron, benazolin, propham, buthan, thiuron, buthan, benazolin, buthan, benazolin, buthan, benazol, Thiobencarb, merthiolane, diclofop, triallate, penoxsulam, pyributicarb, dichlorfon, edifenphos, ethiofen, prosulfocarb, clenbuterol, prosulfocarb, dichotomene, thiobencarb, promethazine, Isopolinate, Methiobencarb, 2, 4-d butyl ester, 2 methyl 4-sodium chloride, 2, 4-d isooctyl ester, 2 methyl 4-chloroisooctyl ester, 2, 4-d sodium salt, 2, 4-d dimethylamine salt, 2 methyl 4-chloroethyl thioester, 2 methyl 4 chloride, 2, 4-d propionic acid, 2, 4-d propionate, 2, 4-d butyric acid, 2 methyl 4-chloropropionic acid, 2 methyl 4-chlorobutyric acid, 2,4, 5-d nasal discharge, 2,4, 5-d propionic acid, 2,4, 5-d butyric acid, 2 methyl 4-chloropropionic acid, 2 methyl 4-d propionic acid, 2-d propionic acid, 2-cloroprionic acid, triclocarb, triclopyr, triclop, Aminodiclofenac, metocloprofenac, diclofop-methyl, fluazifop-p-butyl, haloxyfop-methyl, haloxyfop-p-butyl, quizalofop-ethyl, quizalofop-p-ethyl, fenoxaprop-p-ethyl, propaquizafop-ethyl, fenoxaprop-ethyl, clodinafop-ethyl, benazolin, clodinafop-ethyl, haloxyfop-methyl, benazolin, propalaxyl, butyfen-ethyl, chloroethafloxacin, aminofluanid, benazolin, dichlofop-ethyl, methamphetalin, propamocarb-ethyl, benfop-methyl, thiophosphine, pirimiphos-methyl, benfop-ethyl, benazolin, benfop-methyl, imax-methyl, mefenofos, mefeno, Imazamox ammonium salt, imazapic acid, imazamethabenz ester, fluroxypyr, clopyralid, picloram, triclopyr, dithiopyr, haloxydine, triclopyril, thiazopyr, fluridone, aminopyralid, diflufenzopyr, butoxyethyl triclopyr, Clodinate, sethoxydim, clethodim, cycloxydim, clethodim, topramezone, Buthidazole, metribuzin, hexazinone, metamitron, metribuzin, amitridione, Amibuzin, bromoxynil, octanoyl ioxynil, dichlobenitrile, pyraclonil, hydroxybensulam, Iodobonil, flumetsulam, penoxsulam, clofenapyr, pyraclonil, pyraflufen-ethyl, pyraoxystrobin, flumetsulam, pyraclonil, pyraoxystrobin, isoxathion, pyriftalid, pyriminobac-methyl, pyrithiobac-methyl, benzobicylon, mesotrione, sulcotrione, Tembotrione, Tefuryltrione, Bicyclopyrone, ketodradox, isoxaflutole, isoxaclomazone, fenoxasulfofone, methiozoline, isopyrafen, pyraflufen, pyrazote, difenzoquat, pyrazoxazole, pyroxaflutole, pyroxsulam, pyraclofos, pyraclonil, amicarbazone, carfentrazone, flumiclone, sulfentrazone, bencarane, bisphenomezone, butafenacil, isoxaflutole, cyclam, triclopyr, fluroxypyr, flumethazine, parnaprox, flumiclone, flumethol, carfentrazone, carzone, carfentrazone, car, Fluazifop-methyl, pyriminostrobin, bromopicrin, didaphylm, pyridaben, Pyridafol, quinclorac, chloroquine, bentazon, pyridate, oxaziclomefone, benazolin, clomazone, isoprox, isoproxypyrim, propyribac, cumylfen, clomazone, sodium chlorate, thatch, trichloroacetic acid, monochloroacetic acid, hexachloroacetone, tetrafluoropropionic acid, mequat, bromophenol oxime, triazasulam, imazazole, flurtamone, mesotrione, ethofumesate, pyrimethanil, clodinafop-methyl, clodinium, pyributaine, benfurazolin, meton, metamitron, metolachlor, dichlorvofen, triclopyr, aloac, Dietmquat, Etpronil, ipriflam, iprimazam, iprodione, Trizopyr, Thiaclonifen, chlorpyrifos, pyradifquat, chlorpyrifos, propiram, pyradifurone, pyradifon, pyradifurone, pyrazone, thion, pyrazone, clomazone, fenclorim, cloquintocet-mexyl, mefenpyr-diethyl, DOWFAUC, UBH-509, D489, LS 82-556, KPP-300, NC-324, NC-330, KH-218, DPX-N8189, SC-0744, DOWCO535, DK-8910, V-53482, PP-600, MBH-001, KIH-9201, ET-751, KIH-6127 and KIH-2023.

When used, the commercially available formulations are diluted in the usual manner, if desired, for example in wettable powders, concentrated emulsions, suspensions and granules suspended in water, using water. Powders, granules for soil application or solutions for spreading and spraying generally do not require further dilution with inert substances before use. The required amount of the compound of formula I to be used varies with the external conditions, such as temperature, humidity, the nature of the herbicide used, etc. It may vary widely, for example between 0.001 and 1.0kg/ha, or more of active substance, but preferably between 0.005 and 750g/ha, in particular between 0.005 and 250 g/ha.

Detailed Description

The following examples are intended to illustrate the invention and should not be construed as limiting it in any way. The scope of the invention is indicated by the appended claims.

In view of the economic and diversity of the compounds, we prefer to synthesize some of the compounds, a selection of which are listed in table 1 below. Specific compound structures and corresponding compound information are shown in tables 1-2. The compounds in table 1 are only for better illustrating the present invention, but not for limiting the present invention, and it should not be understood to limit the scope of the above-mentioned subject matter of the present invention to the following compounds for those skilled in the art.

Table 1 Structure of the Compounds

TABLE 2 Compounds¹HNMR data

Examples of representative compounds are as follows:

1. preparation of compound 98:

and (3) constructing a device: a 50mL round bottom single-neck flask, a stirrer and a constant temperature stirrer.

At 8 mmTo a liter of DCM were added in the order compound a (0.4g,1.2mmol,1.0eq), PyBOP (0.69g,1.32mmol,1.1eq), Et₃N (0.16g,1.6mmol,1.3eq) and stirring at room temperature for 30min, then compound b (0.16g,1.3mmol,1.1eq) was added and the reaction was stirred for 12 h. And (5) detecting by TLC, and finishing the reaction. The reaction was poured into 10 ml of water, the layers were separated, the aqueous layer was extracted three times with 10 ml of DCM, the organic layer was dried, spun dried and isolated by column chromatography to give compound 98(0.35g, 67% yield) (white solid).

2. Preparation of compound 99:

and (3) constructing a device: a 50mL round bottom single-neck flask, stir bar, constant temperature magnetic stirrer.

To 10 ml of ACN were added compound a (0.4g,1.2mmol,1.0eq), HATU (0.50g,1.32mmol,1.1eq), DBU (0.24g,1.6mmol,1.3eq) in this order, and after stirring at room temperature for 30min, compound c (0.15g,1.3mmol,1.1eq) was added, and then the reaction was stirred for 12 hours. And (5) detecting by TLC, and finishing the reaction. The reaction solution was poured into 10 ml of water, separated, the aqueous phase was extracted three times with 10 ml of ethyl acetate, the organic phase was dried, spin-dried, and column chromatography was performed to obtain compound 99(0.38g, 74% yield) (white solid).

Several methods for preparing the compounds of the present invention are illustrated in the schemes and examples below. The starting materials are commercially available or can be prepared by methods known in the literature or as shown in detail. It will be appreciated by those skilled in the art that other synthetic routes may also be utilized to synthesize the compounds of the present invention. Although specific starting materials and conditions for the synthetic route are described below, they can be readily substituted with other similar starting materials and conditions, and variations or modifications of the preparation process of the present invention, such as various isomers of the compounds, are included in the scope of the present invention. In addition, the preparation methods described below may be further modified in accordance with the present disclosure using conventional chemical methods well known to those skilled in the art. For example, protecting the appropriate groups during the reaction, and the like.

The following process examples are provided to facilitate a further understanding of the methods of preparation of the present invention, and the particular materials, species and conditions used are intended to be further illustrative of the invention and are not intended to limit the reasonable scope thereof. The reagents used in the synthesis of the compounds indicated in the following table are either commercially available or can be readily prepared by one of ordinary skill in the art.

Examples of representative compounds are as follows:

evaluation of biological Activity:

the activity level criteria for harmful plant destruction (i.e. growth control rate) are as follows:

10 level: death is complete;

and 9, stage: the growth control rate is more than 95 percent;

and 8, stage: the growth control rate is more than 90%;

and 7, stage: the growth control rate is more than 80 percent;

and 6, level: the growth control rate is more than 70%;

and 5, stage: the growth control rate is more than 60 percent;

4, level: the growth control rate is more than 50%;

and 3, level: the growth control rate is more than 20 percent;

and 2, stage: the growth control rate is 5-20%;

level 1: the growth control rate is below 5%;

level 0: no effect is produced.

The growth control rate is the fresh weight control rate.

Post-emergence test experiments: placing monocotyledonous and dicotyledonous weed seeds and main crop seeds (wheat, corn, rice, soybean, cotton, rape, millet and sorghum) in a plastic pot filled with soil, then covering the plastic pot with 0.5-2 cm of soil to make the plastic pot grow in a good greenhouse environment, treating test plants in a 4-5 leaf period after sowing for 2-3 weeks, respectively dissolving the compound of the invention to be tested by acetone, then adding Tween 80, diluting the solution into a solution with certain water to a certain concentration, and spraying the solution onto the plants by a spray tower. The weeds were cultured in the greenhouse for 3 weeks after application, and the experimental effects of the weeds after 3 weeks are shown in tables 3-4.

TABLE 3 post-emergence weed test

Note: the application dose is 45 g/hectare of the active ingredient, and the water adding amount is 450 kg/hectare;

control compound a:

(from patent CN 102675218B).

TABLE 4 post-emergence weed test

Serial number	Corn (corn)	Rice (Oryza sativa L.) with improved resistance to stress	Edible tulip	Herb of veronica	Indian rorippa herb	All-grass of Japanese stephania	Barnyard grass
								9	1	1	10	10	6	7	10
99	1	1	10	10	7	8	10
								Control Compound A	3	2	5	3	6	2	3
Control Compound B	8	5	10	9	3	5	8
								Control Compound C	7	5	10	2	2	3	8

Note: the application dose is 30 g/hectare of the active ingredient, and the water adding amount is 450 kg/hectare;

control compound B:control compound C: and (3) fluorochloropyridine ester.

As can be seen from tables 3 and 4, compared with the control compound, the compound of the present invention significantly improves the safety and herbicidal activity of crops by changing the structure of the mother ring, the type of the substituent, and the type of the carboxyl derivative, and particularly establishes good selectivity for key crops such as corn and rice, while the control compound has poor selectivity for main crops, which indicates that the present invention achieves excellent technical effects.

Pre-emergence test experiment:

placing the monocotyledon and dicotyledon weed seeds and main crop seeds (wheat, corn, rice, soybean, cotton, rape, millet and sorghum) in a plastic pot filled with soil, then covering the plastic pot with 0.5-2 cm of soil, respectively dissolving the compound of the invention to be tested by acetone, then adding Tween 80, diluting the solution into solution with a certain concentration by using a certain amount of water, and immediately spraying the solution after sowing. After the application, the mixture is cultured in a greenhouse for 4 weeks, and after 3 weeks, experimental results are observed, so that the medicament has a superior effect under the measurement of 250 g/hectare, particularly on weeds such as cockspur grass, kukukuh, piemarker and the like, and a plurality of compounds have good selectivity on corn, wheat, rice, soybean and rape.

Experiments show that the compound has better weed control effect generally, has good effect on main gramineous weeds such as cockspur grass, digitaria sanguinalis and setaria viridis and main broadleaf weeds such as piemarker, rorippa rorifolia and sponish needles herb which are widely generated in corn fields, paddy fields and wheat fields, and has good commercial value. Particularly, the broadleaf weeds such as rorippa rorifolia, descurainia sophia, capsella bursa-pastoris, ophiopogon japonicus, cleavers and chickweed which have resistance to ALS inhibitors have extremely high activity.

Evaluating the safety of transplanted rice and the weed control effect of paddy field:

after the paddy field soil was filled in a tank of 1/1,000,000 hectare, seeds of barnyard grass, japanese iris, bidens tripartita and edible tulip were sown, and soil was lightly covered thereon. Standing in a state of water storage depth of 0.5-1 cm in a greenhouse, and implanting tuber of Pseudobulbus Cremastrae seu pleiones in the next or 2 days. Thereafter, the water storage depth was maintained at 3 to 4 cm, and an aqueous dilution of a wettable powder or a suspension, which was prepared by a usual formulation method, was dropped uniformly by a pipette at a time point when barnyard grass, japanese iris, or burley reached 0.5 leaf and the bulb reached the primary leaf stage to obtain a predetermined amount of active ingredient.

In addition, after filling the 1/1,000,000 hectare pot with paddy field soil, leveling is carried out to ensure that the water storage depth is 3-4 cm, and the rice (japonica rice) at the 3-leaf stage is transplanted with the transplanting depth of 3 cm on the next day. The compound of the present invention was treated on the 5 th day after transplantation in the same manner as described above.

The growth states of cockspur grass, Chinese iris, bidens tripartita and edible tulip on 14 th day after the treatment with the medicament and the growth state of rice on 21 th day after the treatment with the medicament are respectively observed by naked eyes, the weeding effect is evaluated according to the activity standard level of 1-10, and a plurality of compounds show excellent activity and selectivity.

Note: the seeds of barnyard grass, Chinese iris, edible tulip and bidens tripartita are all collected from Heilongjiang in China, and are detected to have drug resistance to pyrazosulfuron-ethyl with conventional dosage.

Meanwhile, a plurality of tests show that the compound has good selectivity on gramineous lawns such as zoysia japonica, bermuda grass, tall fescue, blue grass, ryegrass, seashore paspalum and the like, and can prevent and kill a plurality of key gramineous weeds and broadleaf weeds. Tests on soybeans, cotton, sunflower, potatoes, fruit trees, vegetables and the like under different application modes also show excellent selectivity and commercial value.

Claims

1. A substituted pyrimidineformyl oxime derivative represented by general formula I:

wherein the content of the first and second substances,

R₁and R₂Independently represent H, halogen, cyano, nitro, C1-C8 alkyl, halogeno C1-C8 alkyl, C2-C8 alkenyl, C3-C8 cycloalkyl, C1-C8 alkoxy, C1-C8 alkylthio, unsubstituted or substituted phenyl, naphthyl, benzyl, phenoxy or phenylthio, and also compounds of formula-COR₅A group shown;

wherein R is₅Represents C1-C8 alkyl, halogenated C1-C8 alkyl, C2-C8 alkenyl, C3-C8 cycloalkyl, C1-C8 alkoxy, C2-C8 alkenyloxy, C3-C8 cycloalkoxy, C1-C8 alkylthio, C2-C8 alkenylthio, C3-C8 cycloalkylthio, phenoxy, benzyloxy, pyrrolylmethoxy, and amino which may be substituted by C1-C8 alkyl, unsubstituted or substituted phenyl or phenyl C1-C8 alkyl or furyl C1-C8 alkyl;

wherein "substituted phenyl, naphthyl, benzyl, phenoxy or phenylthio", "substituted phenyl or phenyl C1-C8 alkyl or furyl C1-C8 alkyl" means respectively "phenyl, naphthyl, benzyl, phenoxy or phenylthio", "substituted phenyl or phenyl C1-C8 alkyl or furyl C1-C8 alkyl" substituted by one or more groups selected from halogen, cyano, nitro, C1-C8 alkyl, halogenated C1-C8 alkyl, C3-C8 cycloalkyl, C1-C8 alkoxy, C2-C8 alkenyloxy, C1-C8 alkylthio, C2-C8 alkenyl and amino which may be substituted by C1-C8 alkyl, phenyl, phenyloxy, C1-C8 acyl or C2-C8 alkenyl "," phenyl or phenyl C1-C8 alkyl or furyl C1-C8 alkyl ";

or R₁And R₂Are linked to form a 5-or 6-membered saturated ring;

y represents nitro or NR₃R₄Wherein R is₃Represents H, optionally substituted by 1-2R₁₁Substituted C1-C8 alkyl, -COR₁₂Nitro, OR₁₃，SO₂R₁₄，NR₁₅R₁₆，N＝CR₁₇R₁₈；R₄Represents H, optionally substituted by 1-2R₁₁Substituted C1-C8 alkyl or-COR₁₂(ii) a Or NR₃R₄Represents N ═ CR₂₁NR₂₂R₂₃，N＝CR₂₄OR₂₅Unsubstituted or substituted by 1 to 2 radicals independently selected from halogen, C1-C8 alkyl, C1-C8 alkoxy, halogenated C1-C8 alkoxy, C1-C8 alkylthio, halogenated C1-C8 alkylthio, amino, C1-C8 alkylamino, di-C1-C8 alkylamino, C1-C8 alkoxycarbonyl

R₁₂Represents H, C1-C8 alkyl, halogeno-C1-C8 alkyl or C1-C8 alkoxy;

R₁₄represents C1-C8 alkyl, halogenated C1-C8 alkyl;

R₁₅represents H, C1-C8 alkyl, formyl, C1-C8 alkanoyl, halogeno-C1-C8 alkanoyl or C1-C8 alkoxycarbonyl; r₁₆Represents H, C1-C8 alkyl;

R₁₇represents H, C1-C8 alkyl; r₁₈Represents H, C1-C8 alkyl;

R₂₁、R₂₄each independently represents H or C1-C8 alkyl;

R₂₂、R₂₃each independently represents H or C1-C8 alkyl;

R₂₅represents a C1-C8 alkyl group;

a represents halogen and amino;

c represents halogen, halogenated C1-C8 alkyl.

2. A substituted pyrimidineformyl oxime derivative as claimed in claim 1,

R₁and R₂Independently represent H, halogen, cyano, nitro, C1-C6 alkyl, halogenated C1-C8 alkyl, C2-C8 alkenyl, C3-C8 cycloalkyl, C1-C6 alkoxy, C1-C6 alkylthio, naphthyl, benzyl, phenoxy, phenylthio, phenyl which is unsubstituted or substituted by one or more groups selected from halogen, cyano, nitro, C1-C6 alkyl, halogenated C1-C6 alkyl, C3-C8 cycloalkyl, C1-C6 alkoxy, C2-C6 alkenyloxy, C1-C8 alkylthio and amino which may be substituted by C1-C8 alkyl, phenyl, phenyloxy or C1-C8 acyl, and phenyl of formula-COR₅A group shown;

wherein R is₅Represents C1-C8 alkyl, C1-C8 alkoxy, C2-C8 alkenyloxy, C1-C8 alkylthio, phenoxy, benzyloxy, pyrrolylmethoxy, and amino which may be substituted by C1-C8 alkyl, phenyl, furyl C1 alkyl, phenyl C1-C8 alkyl which is unsubstituted or substituted by one or more groups selected from halogen, C1-C8 alkyl, C1-C8 alkoxy;

or R₁And R₂Are linked to form a 5-or 6-membered saturated ring;

y represents nitro or NR₃R₄Wherein R is₃Represents H, optionally substituted by 1-2R₁₁Substituted C1-C6 alkyl, -COR₁₂Nitro, OR₁₃，SO₂R₁₄，NR₁₅R₁₆，N＝CR₁₇R₁₈；R₄Represents H, optionally substituted by 1-2R₁₁Substituted C1-C6 alkyl or-COR₁₂(ii) a Or NR₃R₄Represents N ═ CR₂₁NR₂₂R₂₃Unsubstituted or not substituted

R₁₂Represents H, C1-C8 alkyl, halogeno-C1-C6 alkyl or C1-C6 alkoxy;

R₁₃represents H, C1-C6 alkyl, halogeno-C1-C6 alkyl, benzyl or CHR₃₁C(O)OR₃₂；R₃₁Represents H or C1-C6 alkyl; r₃₂Represents H or C1-C6 alkyl;

R₁₄represents C1-C6 alkyl, halogenated C1-C6 alkyl;

R₁₅represents H, C1-C6 alkyl, formyl, C1-C6 alkanoyl or halogeno C1-C6 alkanoyl; r₁₆Represents H, C1-C6 alkyl;

R₁₇represents H, C1-C6 alkyl; r₁₈Represents H, C1-C6 alkyl;

R₂₁represents H or C1-C6 alkyl;

R₂₂、R₂₃each independently represents H or C1-C6 alkyl;

a represents halogen and amino;

c represents halogen, halogenated C1-C6 alkyl.

3. A substituted pyrimidineformyl oxime derivative as claimed in claim 2,

R₁and R₂Independently represent hydrogen, C1-C4 alkyl, C1-C4 alkoxy, C1-C4 alkylthio, cyano, C1-C4 alkoxycarbonyl, C3-C8 cycloalkyl, and phenyl which is unsubstituted or substituted by one or more groups selected from halogen, haloC 1-C4 alkyl, C1-C4 alkyl, C3-C8 cycloalkyl and C1-C4 alkoxy;

y represents nitro or NR₃R₄Wherein R is₃Represents H, optionally substituted by 1R₁₁Substituted C1-C4 alkyl, -COR₁₂Nitro, OR₁₃，SO₂R₁₄，NR₁₅R₁₆，N＝CR₁₇R₁₈；R₄Represents H or C1-C4 alkyl; or NR₃R₄Represents N ═ CR₂₁NR₂₂R₂₃Unsubstituted or not substituted

Wherein R is₁₁Independently represents hydroxy, C1-C4 alkoxy, di-C1-C4 alkylamino, C1-C4 alkoxycarbonyl,

phenyl unsubstituted or substituted by 1 to 3 groups of halogen, C1-C4 alkoxy, nitro, naphthyl unsubstituted or substituted by 1 to 3 groups of C1-C4 alkyl;

R₁₂represents C1-C8 alkyl or C1-C4 alkoxy;

R₁₃represents H, C1-C4 alkyl, benzyl or CHR₃₁C(O)OR₃₂；R₃₁Represents H; r₃₂Represents H;

R₁₄represents a C1-C4 alkyl group;

R₁₅represents H, C1-C4 alkanoyl; r₁₆Represents H;

R₁₇represents H; r₁₈Represents a C1-C4 alkyl group;

R₂₁represents H;

R₂₂、R₂₃each independently represents a C1-C4 alkyl group;

a represents halogen and amino;

c represents halogen, halogenated C1-C4 alkyl.

4. A substituted pyrimidineformyl oxime derivative as claimed in claim 3 wherein,

R₁and R₂Independently represent hydrogen, methyl, ethyl, propyl, isopropyl, n-butyl, tert-butyl, cyclopropyl, methylthio, ethylthio, cyano, methoxycarbonyl, ethoxycarbonyl, and optionally are selected from halogen, CF₃Phenyl substituted with one or more of methyl, ethyl, propyl, isopropyl, n-butyl, tert-butyl, cyclopropyl, methoxy and ethoxy;

y represents NH₂、NHMe、N(Me)₂、

A represents fluorine, chlorine, amino;

c represents fluorine, chlorine and trifluoromethyl.

5. A substituted pyrimidineformyl oxime derivative as claimed in claim 4 wherein,

R₁and R₂Independently represent hydrogen, methyl, ethyl, propyl, isopropyl, n-butyl, tert-butyl, and optionally be selected from halogen, CF₃Phenyl substituted with one or more of methyl, ethyl, propyl, isopropyl, n-butyl, tert-butyl, cyclopropyl, methoxy and ethoxy;

x represents chlorine;

y represents NH₂；

A represents fluorine;

b represents methoxy;

c represents chlorine.

6. A substituted pyrimidineformyl oxime derivative according to claim 1 having any one of the following structural formulas:

7. a process for the preparation of substituted pyrimidineformyl oxime derivatives as claimed in any one of claims 1 to 5 comprising the steps of: the compound shown in the general formula I is prepared by reacting the compound shown in the general formula II with the compound shown in the general formula III, wherein the reaction equation is as follows:

wherein, X, Y, A, B, C, R₁、R₂Is as defined inThe method according to any one of claims 1 to 5.

8. The process for producing a substituted pyrimidineformyl oxime derivative according to claim 7 wherein the reaction is carried out in an aprotic solvent under the action of a base and a condensing agent.

9. The process for preparing substituted pyrimidineformyl oxime derivative according to claim 8, wherein the reaction temperature is 0 ℃ to 90 ℃; the solvent is one or more mixed solvents selected from dichloromethane, dichloroethane, acetonitrile, N-dimethylformamide, N-dimethylacetamide, dimethyl sulfoxide, tetrahydrofuran, toluene and xylene; the base is selected from one or more of triethylamine, trimethylamine, DIPEA and DBU; the condensing agent is PyBop, HATU or HOBt-EDCI.

10. The process for preparing substituted pyrimidineformyl oxime derivative according to claim 9 wherein the reaction temperature is 25 ℃ to 30 ℃.

11. A herbicidal composition comprising a herbicidally effective amount of at least one of the substituted pyrimidineformyl oxime derivatives of any one of claims 1 to 6.

12. A herbicidal composition according to claim 11, further comprising a formulation adjuvant.

13. A method for controlling harmful plants, which comprises applying a herbicidally effective amount of at least one of the substituted pyrimidinyloxime derivatives as claimed in any of claims 1 to 6 or of the herbicidal composition as claimed in claim 11 or 12 to plants or to the locus of harmful plants.

14. Use of at least one of the substituted pyrimidineformyl oxime derivatives as claimed in any of claims 1 to 6 or the herbicidal composition as claimed in claim 11 or 12 for controlling harmful plants.

15. The use according to claim 14, characterized in that the substituted pyrimidineformyl oxime derivative is used for combating harmful plants in crops of useful plants, which are transgenic or genome editing technology treated crops.