WO2013031671A1 - 有害生物防除剤の製造法 - Google Patents
有害生物防除剤の製造法 Download PDFInfo
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- WO2013031671A1 WO2013031671A1 PCT/JP2012/071399 JP2012071399W WO2013031671A1 WO 2013031671 A1 WO2013031671 A1 WO 2013031671A1 JP 2012071399 W JP2012071399 W JP 2012071399W WO 2013031671 A1 WO2013031671 A1 WO 2013031671A1
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/34—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom
- A01N43/40—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom six-membered rings
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
- A01N43/54—1,3-Diazines; Hydrogenated 1,3-diazines
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/72—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms
- A01N43/74—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms five-membered rings with one nitrogen atom and either one oxygen atom or one sulfur atom in positions 1,3
- A01N43/78—1,3-Thiazoles; Hydrogenated 1,3-thiazoles
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D211/00—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings
- C07D211/04—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D211/80—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having two double bonds between ring members or between ring members and non-ring members
- C07D211/84—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having two double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen directly attached to ring carbon atoms
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
- C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
- C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D213/72—Nitrogen atoms
- C07D213/75—Amino or imino radicals, acylated by carboxylic or carbonic acids, or by sulfur or nitrogen analogues thereof, e.g. carbamates
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
- C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
- C07D401/06—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D417/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00
- C07D417/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings
- C07D417/06—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
Definitions
- the present invention relates to a method for producing a novel pesticide having a 2-acyliminopyridine structure.
- Non-Patent Document 1 neonicotinoids represented by imidacloprid, and main insecticides including phenylpyrazoles represented by fipronil, etc.
- phenylpyrazoles represented by fipronil
- Patent Documents 1 to 3 and Non-patent Document 2 are known as methods for producing a pest control agent having a 2-acyliminopyridine structure.
- Patent Document 1 discloses a herbicide having a ring structure similar to that of a compound represented by the following formula (I).
- Patent Document 2 and Patent Document 3 disclose insecticides having the same ring structure as the compound represented by the formula (I).
- Non-Patent Document 2 discloses a compound having a ring structure similar to that of the compound represented by formula (I) as a synthetic intermediate.
- Patent Literature 1, Patent Literature 2, Patent Literature 3, and Non-Patent Literature 2 are production methods in which a compound represented by the formula (Ba) described below is used as an intermediate. There is no description about the production using the compound represented by (B) as an intermediate. Further, Patent Document 1, Patent Document 2, Patent Document 3, and Non-Patent Document 2 disclose a production method using a compound represented by the formula (Ba) as an intermediate, but in the formula (Ia) described later. There is no specific description regarding the preparation of the indicated compounds.
- Patent Document 3 discloses the structural formula of N- [1-((6-chloropyridin-3-yl) methyl) pyridine-2 (1H) -ylidene] -2,2,2-trifluoroacetamide. Although disclosed and described as a physical property value of the compound having a melting point of 60 to 62 ° C. (Example No. 12 in Table 7 of Patent Document 3), examples of compounds having pest control activity in Examples Not listed. Patent Document 2 and Patent Document 3 disclose specific examples of N- [1-((6-chloropyridin-3-yl) methyl) pyridine-2 (1H) -ylidene] -2,2,2-trifluoroacetamide. There is no disclosure of a typical manufacturing method.
- Non-Patent Document 3 discloses N- (pyridine-2 (1H) -ylidene] -acetamide as a tautomer of 2-acetamidopyridine, a specific production method thereof, A method for producing a haloacyl derivative is not described.
- An object of the present invention is to provide a production method that provides a stable and inexpensive amount of -2,2,2-trifluoroacetamide required as a pest control agent.
- the present inventors use the compound represented by the formula (A) as a starting material and use the compound represented by the formula (B) as an intermediate to achieve the following useful useful
- the present invention was completed by obtaining a compound of formula (I).
- Ar represents an optionally substituted phenyl group, or an optionally substituted 5- to 6-membered heterocycle, and R 1 represents an optionally substituted C 1-6 alkyl group
- Y is a hydrogen atom, a halogen atom, a hydroxyl group, optionally substituted by halogen atom C 1-6 alkyl group, optionally substituted C 1-6 alkyl group by a halogen atom, a cyano group, a formyl group, a nitro Group
- R 1 and Y represent the same meaning as described above, and R 2 represents (1) a trifluoroacetoxy group, (2) a C 1-6 alkyloxy group optionally substituted with a halogen atom, Benzyloxy group optionally substituted by a halogen atom, methyl group, cyano group, nitro group, methoxy group, (3) a C 1-6 alkylcarbonyloxy group optionally substituted by a halogen atom (provided that Represents a phenylcarbonyloxy group optionally substituted by a halogen atom, a methyl group, a cyano group, a nitro group or a methoxy group, (4) a hydroxyl group, or (5) a halogen atom, except a trifluoroacetoxy group)
- R 4 is a halogen atom, optionally substituted by a halogen atom C 1-6 alkyl sulfoxy group, substituted with a halogen
- the present invention provides a method comprising the step of further alkylating the 1-position nitrogen atom of the compound represented by (B) with Ar—CH 2 —R 4 .
- R 3 represents a halogen atom, a cyano group, a nitro group or a trifluoromethyl group
- X represents a carbon atom or a nitrogen atom
- R 1a represents a C 1-6 alkyl group substituted with a halogen.
- R 1a , R 4 , R 3 and X represent the same meaning as described above, and R 2a represents (1) a trifluoroacetoxy group, (2) C 1-6 optionally substituted with a halogen atom
- the compound represented by the formula (I ′) is N- [1-((6-chloropyridine-3) having the following physical properties (a) or (b) or (a) and (b)]: -Yl) methyl) pyridine-2 (1H) -ylidene] -2,2,2-trifluoroacetamide.
- A In powder X-ray diffraction, it has a diffraction angle peak at least at the following diffraction angle (2 ⁇ ).
- a 2-acyliminopyridine derivative useful as a pesticidal agent can be efficiently produced in a single pot and in a high yield as required.
- N- [1-((6-chloropyridin-3-yl) methyl) pyridine-2 (1H) -ylidene] -2,2,2-trifluoroacetamide crystal powder prepared by the first production method It is a graph which shows the result of a X ray crystal analysis. Difference in crystals of N- [1-((6-chloropyridin-3-yl) methyl) pyridine-2 (1H) -ylidene] -2,2,2-trifluoroacetamide prepared by the first production method It is a graph which shows the result of a scanning calorimetric analysis.
- N- [1-((6-chloropyridin-3-yl) methyl) pyridine-2 (1H) -ylidene] -2,2,2-trifluoroacetamide crystal powder prepared by the second production method It is a graph which shows the result of a X ray crystal analysis. Differential of crystals of N- [1-((6-chloropyridin-3-yl) methyl) pyridine-2 (1H) -ylidene] -2,2,2-trifluoroacetamide prepared by the second production method It is a graph which shows the result of a scanning calorimetric analysis.
- alkyl as a substituent or a part of a substituent means linear, branched, cyclic, or a combination thereof unless otherwise defined.
- halogen atom means an atom selected from fluoro, chloro, bromo and iodo.
- the “equivalent” of the base is, for example, 2 equivalents when 1 mol of potassium carbonate is used per 1 mol of the compound represented by the formula (A), and sodium hydroxide or sodium bicarbonate 1 When the mole is used, it is 1 equivalent, and when 1 mole of the organic base is used, it is 1 equivalent.
- salt refers to inorganic acid salts such as hydrochloride, sulfate and nitrate, and organic acid salts such as trifluoroacetate, difluoroacetate and dichloroacetate.
- the “reagent” used simultaneously with the acylating agent R 1 COR 2 may be a hydrate thereof.
- “condensing agent” means N, N′-dicyclohexylcarbodiimide, 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide hydrochloride, 1,1′-carbonyldiimidazole, dipyridyl disulfide, di Imidazolyl disulfide, 1,3,5-trichlorobenzoyl chloride, 1,3,5-trichlorobenzoyl anhydride, PyBop (registered trademark, hexafluorophosphoric acid (benzotriazol-1-yloxy) tripyrrolidinophosphonium), PyBrop (registered) Reagents for synthesizing carboxylic acid derivatives such as esters and amides such as trademark, bromotri (pyrrolidino) phosphonium hexafluorophosphate) are shown.
- C ab attached to a substituent means that the number of carbon atoms contained in the substituent is a to b.
- Ar represents an optionally substituted phenyl group or an optionally substituted 5- to 6-membered heterocycle
- examples of the 5- to 6-membered heterocycle include pyridine, pyrimidine, thiazole, tetrahydrofuran, furan and the like.
- Preferred examples include 3-pyridyl group, 5-pyrimidyl group, 3-thiazolyl group and 5-thiazolyl group, and more preferred is 3-pyridyl group.
- Examples of the phenyl or heterocyclic ring introduced may have a substituent, a halogen atom, C 1-4 alkyl group optionally substituted by a halogen atom, optionally substituted by halogen atom C 1-4
- substituent a halogen atom, C 1-4 alkyl group optionally substituted by a halogen atom, optionally substituted by halogen atom C 1-4
- examples thereof include an alkyloxy group, a hydroxyl group, a cyano group and a nitro group, preferably a halogen atom, a C 1-4 alkyl group which may be substituted with a halogen atom, particularly preferably a chlorine atom.
- the optionally substituted phenyl group and the optionally substituted 5- to 6-membered heterocyclic ring include phenyl group, 3-chlorophenyl group, 4-chlorophenyl group, 3-cyanophenyl group, 4 -Cyanophenyl group, 3-nitrophenyl group, 4-nitrophenyl group, 3,5-dichlorophenyl group, 4-methylphenyl group, 4-methoxyphenyl group, 3,5-dibromophenyl group, 2,4-dibromophenyl Group, 4-fluorophenyl group, 4-bromophenyl group, 3-nitro-5-bromophenyl group, 3,5-bistrifluoromethylphenyl group, 6-chloro-3-pyridyl group, 2-chloro-5-thiazolyl Group, 6-chloro-5-fluoro-3-pyridyl group, 6-bromo-3-pyridyl group, 6-fluoro-3-pyridyl group, 5,6
- R 1 is substituted represents a C 1-6 alkyl group, said C 1-6 is a substituent which may be introduced into the alkyl group, halogen atom, C 1-6 halogenated alkyl group , Cyano group, nitro group, hydroxyl group, specifically, trifluoromethyl group, difluorochloromethyl group, trichloromethyl group, pentafluoroethyl group, difluoromethyl group, dichloromethyl group, dibromomethyl group, chloromethyl group , Difluoroethyl group, dichloroethyl group, 2,2,2-trifluoroethyl group, difluorocyclopropyl group, bromodifluoromethyl group, trifluoromethoxymethyl group, etc., preferably trifluoromethyl group, difluorochloromethyl group , Difluoromethyl group, trichloromethyl group, pentafluoroethyl group, and more preferred Or a trifluoromethyl
- R 1a represents a C 1-6 alkyl group substituted by halogen, and is a trifluoromethyl group, trichloromethyl group, difluorochloromethyl group, difluoromethyl group, dichloromethyl group, dibromomethyl group, chloromethyl group, difluoroethyl Group, dichloroethyl group, 2,2,2-trifluoroethyl group, pentafluoroethyl group, difluorocyclopropyl group and the like, preferably trifluoromethyl group, trichloromethyl group, dichloromethyl group, difluoromethyl group, A difluorochloromethyl group, a chloromethyl group and a pentafluoroethyl group, more preferably a trifluoromethyl group, a difluoromethyl group, a difluorochloromethyl group, a chloromethyl group and a pentafluoroethyl group, particularly preferably a trifluoro
- Y is a hydrogen atom, a halogen atom, a hydroxyl group, a C 1-6 alkyl group optionally substituted by a halogen atom, a C 1-6 alkyl group optionally substituted by a halogen atom, a cyano group, a formyl group, A nitro group, preferably a hydrogen atom, a halogen atom or a hydroxyl group, more preferably a hydrogen atom;
- R 2 and R 2a are (1) a trifluoroacetoxy group, (2) an optionally substituted C 1-6 alkyloxy group, or a phenyl group is a halogen atom, methyl group, cyano group, nitro group Benzyloxy group optionally substituted with a methoxy group, (3) a C 1-6 alkylcarbonyloxy group optionally substituted with a halogen atom (excluding trifluoroacetoxy group), and a phenyl group as a halogen atom , A phenylcarbonyloxy group optionally substituted with a methyl group, a cyano group, a nitro group or a methoxy group, (4) a hydroxyl group, or (5) a halogen atom.
- R 3 represents a substituent substituted on a carbon atom of a pyridine ring or a pyrimidine ring, and the number thereof is clearly 0 to 4 in the case of pyridine and 0 to 3 in the case of a pyrimidine ring.
- the substituent represented by R 3 is a halogen atom, a cyano group, a nitro group, or a trifluoromethyl group, and each may be the same or different.
- R 4 represents halogen, a C 1-6 alkylsulfoxy group which may be substituted with a halogen atom, a phenylsulfoxy group which may be substituted with a halogen atom or a methyl group.
- the compound represented by the formulas (I) and (Ia) is preferably Compound No. 1: N- [1-((6-chloropyridin-3-yl) methyl) pyridine-2 (1H) -ylidene] -2 , 2,2-trifluoroacetamide, compound no.
- Preferred examples of the compound represented by the formula (B) include 2,2,2-trifluoro-N- (pyridine-2 (1H) -ylidene) acetamide, 2-chloro-2,2-difluoro-N— (Pyridine-2 (1H) -ylidene) acetamide, 2,2,3,3,3-pentafluoro-N- (pyridine-2 (1H) -ylidene) propanamide, 2,2-difluoro-N- (pyridine- 2 (1H) -ylidene) acetamide, and a more preferred example is 2,2,2-trifluoro-N- (pyridine-2 (1H) -ylidene) acetamide represented by the following formula (B1).
- the compound represented by the formula (A) is present in the absence of a solvent or in a solvent that does not affect the reaction in the presence of a base.
- it can be obtained by reacting with an acylating agent R 1 COR 2 (R 1 and R 2 have the same meaning as defined above) in the absence.
- the number of equivalents of the reagent referred to here is the number of equivalents of the compound represented by the formula (A).
- Usable solvents include aromatic hydrocarbon solvents such as toluene, xylene and ethylbenzene, ester solvents such as ethyl acetate and butyl acetate, ether solvents such as diethyl ether, diisopropyl ether, tetrahydrofuran and dioxane, N, N -Aprotic polar organic solvents such as dimethylformamide, dimethyl sulfoxide, N, N-dimethylacetamide, N-methyl-2-pyrrolidinone, acetonitrile, halogen solvents such as dichloromethane and chloroform, hydrocarbon solvents such as cyclohexane, acetone , Ketone solvents such as methyl ethyl ketone, water, or a mixed solvent thereof.
- aromatic hydrocarbon solvents such as toluene, xylene and ethylbenzene
- ester solvents such as ethyl acetate
- Usable bases include sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, sodium hydroxide, magnesium hydroxide, calcium hydroxide, lithium hydroxide, barium hydroxide and other inorganic bases, 1,8-diazabicyclo [5.4.0] undec-7-ene, 1,5-diazabicyclo [4.3.0] non-5-ene, triethylamine, diisopropylethylamine, pyridine, picoline, dimethylaminopyridine and other organic bases, sodium ethoxy And alcoholates such as sodium methoxide and tert-butoxypotassium.
- a base may not be used, but the amount used in the presence of a base can be 0.01 to 20.0 equivalents.
- Examples of the acylating agent R 1 COR 2 include trifluoroacetic anhydride, trifluoroacetic acid, ethyl trifluoroacetate, trifluoroacetic acid chloride, or mixed acid anhydride. Such acylating agents may be used alone or in admixture of two or more. Among these, preferably, trifluoroacetic anhydride, trifluoroacetic acid, ethyl trifluoroacetate, or trifluoroacetic acid chloride can be used.
- R 2 represents a hydroxyl group
- iron, cobalt, copper, nickel, zinc, aluminum, lithium or magnesium halides, sulfates, nitrates or oxides include zinc chloride, copper chloride, magnesium chloride, cobalt chloride, nickel chloride, secondary chloride Examples include iron, aluminum chloride, iron sulfate, and aluminum sulfate. Further, these metal compounds may be their anhydrides or hydrates.
- the amount of the acylating agent used is preferably 0.5 to 10.0 equivalents, more preferably 1.0 to 5.0 equivalents.
- the reaction temperature is preferably in the range of ⁇ 80 ° C. to 200 ° C.
- the reaction time is preferably in the range of 0.1 hour to 7 days.
- R 2 represents a trifluoroacetoxy group
- preferred solvents include ester solvents such as ethyl acetate and butyl acetate, dichloromethane, chloroform and the like And an aromatic hydrocarbon solvent such as toluene, xylene, and ethylbenzene, more preferably toluene.
- the reaction is preferably carried out in the absence of a base, but preferred bases when using a base include sodium carbonate, potassium carbonate, potassium hydrogen carbonate, triethylamine, pyridine and the like, and more preferably potassium carbonate.
- the amount of the acylating agent used is preferably 1.0 to 5.0 equivalents, more preferably 1.0 to 1.5 equivalents.
- the amount of the base used is preferably 1.0 to 4.5 equivalents, more preferably 1.0 to 3.0 equivalents.
- the reaction temperature is preferably in the range of ⁇ 20 ° C. to 50 ° C., more preferably ⁇ 10 ° C. to 30 ° C.
- the reaction time is preferably in the range of 0.1 hour to 7 days, and more preferably in the range of 0.5 hour to 4 hours.
- Particularly preferred conditions are trifluoroacetic anhydride as the acylating agent, toluene as the solvent, the amount of the acylating agent used is 1.0 to 1.5 equivalents, the reaction temperature is ⁇ 10 ° C. to 30 ° C., and the reaction time Is a condition of 0.5 to 4 hours.
- the base is in the absence, or when the base is used, potassium carbonate is used, and the equivalent number is 1.0 to 3.0 equivalents.
- the reaction is preferably carried out in the absence of a base, but preferred bases when using a base include potassium carbonate, triethylamine, dimethylaminopyridine and the like, and more preferred are potassium carbonate and dimethylaminopyridine.
- the amount of the acylating agent used is preferably 1.0 to 5.0 equivalents, more preferably 1.5 to 5.0 equivalents.
- the amount of the base used is preferably 0.01 to 3.0 equivalents, more preferably 0.01 to 2.0 equivalents.
- the reaction temperature is preferably in the range of 20 ° C to 100 ° C, more preferably 40 ° C to 80 ° C.
- the reaction time is preferably in the range of 0.1 hour to 7 days, more preferably in the range of 1 hour to 2 days.
- Particularly preferred conditions are ethyl trifluoroacetate as the acylating agent, N, N-dimethylformamide or a mixed solvent of N, N-dimethylformamide and toluene as the solvent, and the amount of acylating agent used is 1.5 to 5
- the reaction temperature is 40 ° C. to 80 ° C., and the reaction time is 2 hours to 2 days.
- the base is in the absence, or when a base is used, potassium carbonate or dimethylaminopyridine is used, and the equivalent number is 0.01 to 2.0 equivalents.
- R 1 is a C 1-6 alkylcarbonyloxy group (excluding trifluoroacetoxy group) optionally substituted with a halogen atom, a phenyl group is a halogen atom, a methyl group, a cyano group, a nitro group, When showing the phenylcarbonyloxy group which may be substituted by the methoxy group, a pivaloyl group is specifically mentioned.
- the reaction temperature is preferably in the range of ⁇ 20 ° C. to 50 ° C., more preferably ⁇ 10 ° C. to 30 ° C.
- the reaction time is preferably in the range of 0.1 hour to 7 days, and more preferably in the range of 0.5 hour to 4 hours.
- specific acylating agents include trifluoroacetic acid, difluorochloroacetic acid, trichloroacetic acid, difluoroacetic acid, dichloroacetic acid, dibromoacetic acid, chloroacetic acid, difluoropropionic acid, dichloropropionic acid, 2,2,2-trifluoropropionic acid, pentafluoropropionic acid, difluorocyclopropanecarboxylic acid, etc.
- trifluoroacetic acid preferably trifluoroacetic acid, trichloroacetic acid, dichloroacetic acid, difluoroacetic acid, difluorochloroacetic acid, chloroacetic acid, pentafluoro Propionic acid, more preferably trifluoroacetic acid, difluoroacetic acid, difluorochloroacetic acid, and pentafluoropropionic acid, and particularly preferably trifluoroacetic acid.
- preferred solvents include aromatic hydrocarbon solvents such as toluene, xylene, and ethylbenzene, and N, N-dimethylformamide, dimethyl sulfoxide, N, N-dimethylacetamide, N-methyl-2-pyrrolidinone.
- aromatic hydrocarbon solvents such as toluene, xylene, and ethylbenzene
- N, N-dimethylformamide, dimethyl sulfoxide N, N-dimethylacetamide, N-methyl-2-pyrrolidinone
- aprotic polar organic solvents such as acetonitrile, more preferably toluene, xylene, N, N-dimethylformamide, N-methyl-2-pyrrolidinone, N, N-dimethylacetamide, toluene and N, N-dimethyl.
- Reagents used at the same time include N, N′-dicyclohexylcarbodiimide, 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide hydrochloride, phosphorus pentoxide, sulfuric acid, polyphosphoric acid, thionyl chloride, phosphorus oxychloride, oxalic acid Examples thereof include dichloride, and it is preferable to use 0.2 to 5.0 equivalents of these.
- zinc chloride copper chloride, magnesium chloride, cobalt chloride, nickel chloride, ferric chloride, aluminum chloride, iron sulfate, aluminum sulfate, boron trifluoride, paratoluenesulfonic acid, etc. Is preferably used in an amount of 0.0001 to 1.0 equivalent.
- Reaction is phosphorus pentoxide, sulfuric acid, polyphosphoric acid, thionyl chloride, phosphorus oxychloride, oxalic acid dichloride, zinc chloride, copper chloride, magnesium chloride, cobalt chloride, nickel chloride, ferric chloride, aluminum chloride, iron sulfate, sulfuric acid
- aluminum, boron trifluoride, or paratoluenesulfonic acid it is preferably in the presence of a non-base, and in the case of using N, N′-dicyclohexylcarbodiimide or 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide hydrochloride In the presence of a base is preferred.
- Preferred bases when using a base include sodium carbonate, potassium carbonate, potassium hydrogen carbonate, triethylamine, pyridine, dimethylaminopyridine, and the like, more preferably triethylamine.
- the amount of the acylating agent used is preferably 1.0 to 5.0 equivalents, more preferably 1.0 to 3.0 equivalents.
- thionyl chloride, phosphorus oxychloride and oxalic acid dichloride 0.2 to 5.0 equivalents of these reagents are used, and the reaction temperature is preferably in the range of ⁇ 30 ° C. to 80 ° C., more preferably ⁇ 10 ° C to 40 ° C.
- reaction temperature is preferably in the range of ⁇ 30 ° C. to 200 ° C., more preferably ⁇ 10 ° C. ⁇ 160 ° C.
- N, N′-dicyclohexylcarbodiimide or 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide hydrochloride is used, 0.2 to 5.0 equivalents of these reagents are used and the reaction temperature is from ⁇ 30 ° C. to The temperature is preferably in the range of 80 ° C., more preferably ⁇ 10 ° C.
- reaction temperature is preferably in the range of 20 ° C to 200 ° C, more preferably 80 ° C to 160 ° C.
- reaction time is preferably in the range of 0.1 hour to 7 days, and more preferably in the range of 0.5 hour to 2 days.
- Particularly preferred conditions are trifluoroacetic acid as the acylating agent, toluene, N, N-dimethylformamide, xylene, N-methyl-2-pyrrolidinone, N, N-dimethylacetamide, N, N-dimethylformamide and toluene as the acylating agent.
- a mixed solvent a mixed solvent of N, N-dimethylformamide and xylene, a mixed solvent of xylene and N-methyl-2-pyrrolidinone or a mixed solvent of xylene and N, N-dimethylacetamide
- the amount of acylating agent used is 1 0.0 to 3.0 equivalents.
- Particularly preferred conditions when using thionyl chloride, phosphorus oxychloride, and oxalic acid dichloride are 0.3 to 3.0 equivalents of these reagents, the reaction temperature is ⁇ 10 ° C. to 40 ° C., and the reaction time is in the presence of a non-base. The conditions are 0.5 hours to 1 day. Particularly preferred conditions when using phosphorus pentoxide, sulfuric acid, and polyphosphoric acid are 0.2 to 2.0 equivalents of these reagents, the reaction temperature is ⁇ 10 ° C. to 160 ° C., and the reaction time is 0.5 hours to 1. The condition of the day.
- N, N′-dicyclohexylcarbodiimide and 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide hydrochloride are 0.5 to 3 equivalents of these reagents, and the reaction temperature is ⁇ 10.
- the reaction temperature is 0.5 to 3.0 equivalents using triethylamine as a base and the reaction time is 0.5 to 1 day.
- Particularly preferred conditions when using zinc chloride, copper chloride, magnesium chloride, cobalt chloride, nickel chloride, ferric chloride, aluminum chloride, iron sulfate, aluminum sulfate, boron trifluoride, paratoluenesulfonic acid are those reagents.
- the reaction temperature is 80 ° C. to 160 ° C.
- the reaction time is 2 hours to 2 days.
- R 2 represents a halogen atom
- preferred solvents include halogen solvents such as chloroform and dichloromethane, Aromatic hydrocarbon solvents such as toluene, xylene and ethylbenzene, and aprotic polar organic solvents such as N, N-dimethylformamide, dimethyl sulfoxide, N, N-dimethylacetamide, N-methyl-2-pyrrolidinone and acetonitrile More preferred are toluene, N, N-dimethylformamide, N-methyl-2-pyrrolidinone, or a mixed solvent thereof.
- the reaction is preferably carried out in the absence of a base, but preferred bases when using a base include sodium carbonate, potassium carbonate, potassium hydrogen carbonate, triethylamine, pyridine and the like, and more preferably potassium carbonate.
- the amount of the acylating agent used is preferably 1.0 to 5.0 equivalents, more preferably 1.0 to 3.0 equivalents.
- the amount of the base used is preferably 1.0 to 5.0 equivalents, more preferably 1.0 to 3.0 equivalents.
- the reaction temperature is preferably in the range of ⁇ 80 ° C. to 40 ° C., more preferably ⁇ 30 ° C. to 30 ° C.
- the reaction time is preferably in the range of 0.1 hour to 7 days, and more preferably in the range of 0.5 hour to 8 hours.
- R 2 represents a chlorine atom, trifluoroacetic acid and thionyl chloride, phosphorus oxychloride, oxalic acid dichloride, etc. are simultaneously used outside the system for reacting with the compound represented by the formula (A).
- the produced R 1 COCl can also be used.
- Particularly preferred conditions are: trifluoroacetic chloride as the acylating agent, toluene, N, N-dimethylformamide, N-methyl-2-pyrrolidinone or a mixed solvent thereof as the solvent, and the amount of acylating agent used is 1.0.
- the reaction temperature is ⁇ 30 ° C. to 30 ° C., and the reaction time is 0.5 hour to 8 hours. It is particularly preferable that the base is absent or that potassium carbonate is used when a base is used, and the equivalent number is 1.0 to 3.0 equivalents.
- bases include sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, sodium hydroxide, magnesium hydroxide, calcium hydroxide, lithium hydroxide, barium hydroxide and other inorganic bases, 1,8-diazabicyclo [5.4.0] undec-7-ene, 1,5-diazabicyclo [4.3.0] non-5-ene, triethylamine, diisopropylethylamine, pyridine, picoline, dimethylaminopyridine and other organic bases, sodium ethoxy Alcohol, sodium methoxide, tert-butoxy potassium, and the like, and potassium carbonate, sodium ethoxide, and triethylamine are preferable.
- Usable solvents include ether solvents such as diethyl ether, diisopropyl ether, tetrahydrofuran and dioxane, N, N-dimethylformamide, dimethyl sulfoxide, N, N-dimethylacetamide, acetonitrile, N-methyl-2-pyrrolidinone, N -Aprotic polar organic solvents such as methyl-2-piperazinone, N, N-dimethyl-2-imidazolidinone, acetonitrile, halogen solvents such as dichloromethane and chloroform, aromatic hydrocarbons such as toluene, xylene and ethylbenzene Examples thereof include a solvent and a mixed solvent thereof, and preferably an aprotic polar organic solvent.
- ether solvents such as diethyl ether, diisopropyl ether, tetrahydrofuran and dioxane
- N, N-dimethylformamide dimethyl
- bases examples include inorganic carbonates such as sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, sodium hydroxide, magnesium hydroxide, calcium hydroxide, lithium hydroxide, and barium hydroxide.
- the amount of Ar—CH 2 —R 4 (Ar, R 4 has the same meaning as defined above) is preferably 0. 0 to the compound represented by formula (B) or formula (B ′). 7 to 2.0 equivalents, more preferably 0.8 to 1.5 equivalents.
- the amount of the base used is preferably 1.0 to 10.0 equivalents, more preferably 1.0 to 5 with respect to the compound represented by formula (B) or formula (B ′). 0.0 equivalents.
- the reaction temperature is preferably in the range of 20 ° C. to 100 ° C., more preferably 40 ° C. to 80 ° C.
- the reaction time is preferably in the range of 0.1 hour to 3 days, and more preferably in the range of 1 hour to 2 days.
- R 4 is a chlorine atom, N, N-dimethylformamide, N-methyl-2-pyrrolidinone, N, N-dimethylacetamide, a mixed solvent of N, N-dimethylformamide and toluene, N, N
- the amount of Ar—CH 2 —R 4 used is represented by the formula ( B) or 0.8 to 1.5 equivalents relative to the compound represented by formula (B ′)
- the reaction temperature is 40 ° C. to 80 ° C.
- the reaction time is 1 hour to 2 days
- the base is This is a condition using 1.0 to 5.0 equivalents of potassium carbonate or triethylamine.
- One pot for obtaining a compound represented by formula (I) or formula (I ′) from a compound represented by formula (A) or formula (A ′) via a compound represented by formula (B) or (B ′) When synthesizing a compound represented by formula (I) or formula (I ′) from a compound represented by production formula (A) or formula (A ′), a compound represented by formula B or formula (B ′) It is possible to obtain the compound represented by the formula (I) or the formula (I ′) by performing the next step without isolating.
- reaction product represented by the formula (B) or the formula (B ′) is used as it is or after excess reagent is removed under reduced pressure, and then Ar—CH 2 —R 4 (Ar and R 4 are the above-described ones). And a base are added and reacted under the above conditions to obtain a compound represented by formula (I) or formula (I ′).
- a compound represented by formula (I) or formula (I ′) is obtained from a compound represented by formula (A) or formula (A ′) via a compound represented by formula (B) or formula (B ′).
- the compound represented by the formula (A) or the formula (A ′) in the presence of a non-base, is used with an aromatic hydrocarbon solvent or an aprotic polar solvent, or a mixed solvent thereof.
- a compound represented by the formula (I) or the formula (I ′) is prepared by adding a solvent, Ar—CH 2 —R 4 and a base, and reacting with or without distilling off the aromatic hydrocarbon solvent under reduced pressure. How to get.
- R 2 is a CF 3 COO group, an OEt group, a hydroxyl group or It is particularly preferable to use R 1 COR 2 or CF 3 COR 2 which is a chlorine atom.
- R 2 is a CF 3 COO group (for example, trifluoroacetic anhydride)
- toluene is used as a solvent
- the amount of acylating agent used is 1.0 to 1.5 equivalents
- the reaction temperature is from ⁇ 10 ° C. to 30 ° C.
- reaction time is 0.5 to 4 hours
- the base is absent
- potassium carbonate is used when a base is used
- the equivalent number is 1.0 to 3.0 equivalents Conditions are particularly preferred.
- R 2 is an OEt group (ethyl trifluoroacetate)
- N, N-dimethylformamide or a mixed solvent of N, N-dimethylformamide and toluene is used as the solvent, and the amount of acylating agent used is 1.5 to 5.0 equivalents
- the reaction temperature is 40 to 80 ° C.
- the reaction time is 2 hours to 2 days
- the base is absent
- potassium carbonate or dimethylaminopyridine is used when a base is used.
- the number of equivalents is particularly preferably 0.01 to 2.0 equivalents.
- R 2 is a hydroxyl group
- Particularly preferred conditions when R 2 is a hydroxyl group are toluene, N, N-dimethylformamide, xylene, N-methyl-2-pyrrolidinone, N, N-dimethylacetamide, N, N as a solvent.
- the amount of the agent used is 1.0 to 3.0 equivalents.
- Particularly preferred conditions when using thionyl chloride, phosphorus oxychloride, and oxalic acid dichloride are 0.3 to 3.0 equivalents of these reagents, the reaction temperature is ⁇ 10 ° C. to 40 ° C., and the reaction time is in the presence of a non-base. The conditions are 0.5 hours to 1 day. Particularly preferable conditions when using phosphorus pentoxide, sulfuric acid, and polyphosphoric acid are 0.5 to 2.0 equivalents of these reagents, the reaction temperature is ⁇ 10 ° C. to 160 ° C., and the reaction time is 0.5 hours to 1. The condition of the day.
- N, N′-dicyclohexylcarbodiimide and 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide hydrochloride are 0.5 to 3.0 equivalents of these reagents, and the reaction temperature is The reaction temperature is ⁇ 10 ° C. to 40 ° C., 0.5 to 3.0 equivalents of triethylamine is used as a base, and the reaction time is 0.5 to 1 day.
- Particularly preferred conditions when using zinc chloride, copper chloride, magnesium chloride, cobalt chloride, nickel chloride, ferric chloride, aluminum chloride, iron sulfate, aluminum sulfate, boron trifluoride, paratoluenesulfonic acid are those reagents.
- the reaction temperature is 80 ° C. to 160 ° C.
- the reaction time is 2 hours to 2 days.
- R 2 is a chlorine atom (for example, trifluoroacetic acid chloride), toluene, N, N-dimethylformamide, N-methyl-2-pyrrolidinone or a mixed solvent thereof is used as a solvent, and the amount of acylating agent used is
- the conditions are 1.0 to 3.0 equivalents, the reaction temperature is ⁇ 30 ° C. to 30 ° C., and the reaction time is 0.5 hours to 8 hours. It is particularly preferable that the base is in the absence or if potassium is used, potassium carbonate is used, and the number of equivalents is 1.0 to 3.0 equivalents.
- R 4 is a chlorine atom, N, N-dimethylformamide, N-methyl-2-pyrrolidinone, N, N-dimethylacetamide, mixed solvent of N, N-dimethylformamide and toluene, mixed solvent of N, N-dimethylformamide and xylene, mixed solvent of xylene and N-methyl-2-pyrrolidinone or xylene and N, N-dimethylacetamide
- the amount of Ar—CH 2 —R 4 used is 0.8 to 1.5 equivalents relative to the compound represented by formula (B) or formula (B ′), and the reaction temperature is 40 ⁇ 80 ° C., the reaction time is for one hour to two days, the base is
- the acylating agent R 1a COR 2a R 1a , R 2a represents the same meaning as defined above in the presence or absence of a base in the compound represented by the formula (Ba) in a solvent that does not affect the reaction.
- the number of equivalents of the reagent referred to here is the number of equivalents of the compound represented by the formula (Ba).
- Usable solvents include aromatic hydrocarbon solvents such as toluene, xylene and ethylbenzene, ester solvents such as ethyl acetate and butyl acetate, ether solvents such as diethyl ether, diisopropyl ether, tetrahydrofuran and dioxane, N, N -Aprotic polar organic solvents such as dimethylformamide, dimethyl sulfoxide, N, N-dimethylacetamide, N-methyl-2-pyrrolidinone, acetonitrile, halogen solvents such as dichloromethane and chloroform, hydrocarbon solvents such as cyclohexane, acetone , Ketone solvents such as methyl ethyl ketone, water, or a mixed solvent thereof.
- aromatic hydrocarbon solvents such as toluene, xylene and ethylbenzene
- ester solvents such as ethyl acetate
- Usable bases include sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, sodium hydroxide, magnesium hydroxide, calcium hydroxide, lithium hydroxide, barium hydroxide and other inorganic bases, 1,8-diazabicyclo [5.4.0] undec-7-ene, 1,5-diazabicyclo [4.3.0] non-5-ene, triethylamine, diisopropylethylamine, pyridine, picoline, dimethylaminopyridine and other organic bases, sodium ethoxy And alcoholates such as sodium methoxide and tert-butoxypotassium.
- a base may not be used, but the amount used in the presence of a base can be 0.01 to 20.0 equivalents.
- Examples of the acylating agent R 1 COR 2 include trifluoroacetic anhydride, trifluoroacetic acid, ethyl trifluoroacetate, trifluoroacetic acid chloride, or mixed acid anhydride. Such acylating agents may be used alone or in admixture of two or more. Among these, preferably, trifluoroacetic anhydride, trifluoroacetic acid, ethyl trifluoroacetate, or trifluoroacetic acid chloride can be used.
- R 2 represents a hydroxyl group
- the reaction temperature is preferably in the range of ⁇ 80 ° C. to 200 ° C.
- the reaction time is preferably in the range of 0.1 hour to 7 days.
- R 2 represents a trifluoroacetoxy group
- preferred solvents include ester solvents such as ethyl acetate and butyl acetate, dichloromethane, chloroform and the like And an aromatic hydrocarbon solvent such as toluene, xylene, and ethylbenzene, more preferably toluene.
- the reaction is preferably carried out in the absence of a base, but preferred bases when using a base include sodium carbonate, potassium carbonate, potassium hydrogen carbonate, triethylamine, pyridine and the like, and more preferably potassium carbonate.
- the amount of the acylating agent used is preferably 1.0 to 5.0 equivalents, more preferably 1.0 to 1.5 equivalents.
- the amount of the base used is preferably 1.0 to 4.5 equivalents, more preferably 1.0 to 3.0 equivalents.
- the reaction temperature is preferably in the range of ⁇ 20 ° C. to 50 ° C., more preferably ⁇ 10 ° C. to 30 ° C.
- the reaction time is preferably in the range of 0.1 hour to 7 days, and more preferably in the range of 0.5 hour to 4 hours.
- Particularly preferred conditions are trifluoroacetic anhydride as the acylating agent, toluene as the solvent, the amount of the acylating agent used is 1.0 to 1.5 equivalents, the reaction temperature is ⁇ 10 ° C. to 30 ° C., and the reaction time Is a condition of 0.5 to 4 hours.
- the base is in the absence, or when the base is used, potassium carbonate is used, and the equivalent number is 1.0 to 3.0 equivalents.
- the reaction is preferably carried out in the absence of a base, but preferred bases when using a base include potassium carbonate, triethylamine, dimethylaminopyridine and the like, and more preferred are potassium carbonate and dimethylaminopyridine.
- the amount of the acylating agent used is preferably 1.0 to 5.0 equivalents, more preferably 1.5 to 5.0 equivalents.
- the amount of the base used is preferably 0.01 to 3.0 equivalents, more preferably 0.01 to 2.0 equivalents.
- the reaction temperature is preferably in the range of 20 ° C to 100 ° C, more preferably 40 ° C to 80 ° C.
- the reaction time is preferably in the range of 0.1 hour to 7 days, more preferably in the range of 1 hour to 2 days.
- Particularly preferred conditions are ethyl trifluoroacetate as the acylating agent, N, N-dimethylformamide or a mixed solvent of N, N-dimethylformamide and toluene as the solvent, and the amount of acylating agent used is 1.0 to 5
- the reaction temperature is 40 ° C. to 80 ° C., and the reaction time is 2 hours to 2 days.
- the base is in the absence, or when a base is used, potassium carbonate or dimethylaminopyridine is used, and the equivalent number is 0.01 to 2.0 equivalents.
- R 1 is a C 1-6 alkylcarbonyloxy group (excluding trifluoroacetoxy group) optionally substituted with a halogen atom, a phenyl group is a halogen atom, a methyl group, a cyano group, a nitro group, When showing the phenylcarbonyloxy group which may be substituted by the methoxy group, a pivaloyl group is specifically mentioned.
- the reaction temperature is preferably in the range of ⁇ 20 ° C. to 50 ° C., more preferably ⁇ 10 ° C. to 30 ° C.
- the reaction time is preferably in the range of 0.1 hour to 7 days, and more preferably in the range of 0.5 hour to 4 hours.
- specific acylating agents include trifluoroacetic acid, difluorochloroacetic acid, trichloroacetic acid, difluoroacetic acid, dichloroacetic acid, dibromoacetic acid, chloroacetic acid, difluoropropionic acid, dichloropropionic acid, 2,2,2-trifluoropropionic acid, pentafluoropropionic acid, difluorocyclopropanecarboxylic acid, etc.
- trifluoroacetic acid preferably trifluoroacetic acid, trichloroacetic acid, dichloroacetic acid, difluoroacetic acid, difluorochloroacetic acid, chloroacetic acid, pentafluoro Propionic acid, more preferably trifluoroacetic acid, difluoroacetic acid, difluorochloroacetic acid, and pentafluoropropionic acid, and particularly preferably trifluoroacetic acid.
- preferred solvents include aromatic hydrocarbon solvents such as toluene, xylene, and ethylbenzene, and N, N-dimethylformamide, dimethyl sulfoxide, N, N-dimethylacetamide, N-methyl-2-pyrrolidinone.
- aprotic polar organic solvents such as acetonitrile, more preferably toluene, xylene, N, N-dimethylformamide, N-methyl-2-pyrrolidinone, a mixed solvent of toluene and N, N-dimethylformamide, xylene and A mixed solvent of N, N-dimethylformamide or a mixed solvent of xylene and N-methyl-2-pyrrolidinone.
- Reagents used at the same time include N, N′-dicyclohexylcarbodiimide, 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide hydrochloride, phosphorus pentoxide, sulfuric acid, polyphosphoric acid, thionyl chloride, phosphorus oxychloride, oxalic acid Examples thereof include dichloride, and it is preferable to use 0.2 to 5.0 equivalents of these.
- zinc chloride copper chloride, magnesium chloride, cobalt chloride, nickel chloride, ferric chloride, aluminum chloride, iron sulfate, aluminum sulfate, boron trifluoride, paratoluenesulfonic acid, etc. Is preferably used in an amount of 0.0001 to 1.0 equivalent.
- Reaction is phosphorus pentoxide, sulfuric acid, polyphosphoric acid, thionyl chloride, phosphorus oxychloride, oxalic acid dichloride, zinc chloride, copper chloride, magnesium chloride, cobalt chloride, nickel chloride, ferric chloride, aluminum chloride, iron sulfate, sulfuric acid
- aluminum, boron trifluoride, or paratoluenesulfonic acid it is preferably in the presence of a non-base, and in the case of using N, N′-dicyclohexylcarbodiimide or 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide hydrochloride In the presence of a base is preferred.
- Preferred bases when using a base include sodium carbonate, potassium carbonate, potassium hydrogen carbonate, triethylamine, pyridine, dimethylaminopyridine, and the like, more preferably triethylamine.
- the amount of the acylating agent used is preferably 1.0 to 5.0 equivalents, more preferably 1.0 to 3.0 equivalents.
- thionyl chloride, phosphorus oxychloride and oxalic acid dichloride 0.2 to 5.0 equivalents of these reagents are used, and the reaction temperature is preferably in the range of ⁇ 30 ° C. to 80 ° C., more preferably ⁇ 10 ° C to 40 ° C.
- reaction temperature is preferably in the range of ⁇ 30 ° C. to 200 ° C., more preferably ⁇ 10 ° C. ⁇ 160 ° C.
- N, N′-dicyclohexylcarbodiimide or 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide hydrochloride is used, 0.2 to 5.0 equivalents of these reagents are used and the reaction temperature is from ⁇ 30 ° C. to The temperature is preferably in the range of 80 ° C., more preferably ⁇ 10 ° C.
- reaction temperature is preferably in the range of 20 ° C to 200 ° C, more preferably 80 ° C to 160 ° C.
- reaction time is preferably in the range of 0.1 hour to 7 days, and more preferably in the range of 0.5 hour to 2 days.
- Particularly preferred conditions are trifluoroacetic acid as the acylating agent, toluene, N, N-dimethylformamide, xylene, N-methyl-2-pyrrolidinone, N, N-dimethylacetamide, N, N-dimethylformamide and toluene as the acylating agent.
- the amount of acylating agent used is 1 0.0 to 3.0 equivalents.
- Particularly preferred conditions when using thionyl chloride, phosphorus oxychloride, and oxalic acid dichloride are 0.3 to 3.0 equivalents of these reagents, the reaction temperature is ⁇ 10 ° C. to 40 ° C., and the reaction time is in the presence of a non-base. The conditions are 0.5 hours to 1 day. Particularly preferred conditions when using phosphorus pentoxide, sulfuric acid, and polyphosphoric acid are 0.2 to 2.0 equivalents of these reagents, the reaction temperature is ⁇ 10 ° C. to 160 ° C., and the reaction time is 0.5 hours to 1. The condition of the day.
- N, N′-dicyclohexylcarbodiimide and 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide hydrochloride are 0.5 to 3.0 equivalents of these reagents, and the reaction temperature is The temperature is ⁇ 10 ° C. to 40 ° C., 0.5 to 3.0 equivalents of triethylamine is used as a base, and the reaction time is 0.5 to 1 day.
- Particularly preferred conditions when using zinc chloride, copper chloride, magnesium chloride, cobalt chloride, nickel chloride, ferric chloride, aluminum chloride, iron sulfate, aluminum sulfate, boron trifluoride, paratoluenesulfonic acid are those reagents.
- the reaction temperature is 80 ° C. to 160 ° C.
- the reaction time is 2 hours to 2 days.
- R 2 represents a halogen atom
- trifluoroacetic acid chloride trifluoroacetic acid bromide, preferably trifluoroacetic acid chloride
- preferred solvents include aromatics such as toluene, xylene, and ethylbenzene.
- Hydrocarbon solvents such as dichloromethane and chloroform
- aprotic polar organic solvents such as N, N-dimethylformamide, dimethyl sulfoxide, N, N-dimethylacetamide, N-methyl-2-pyrrolidinone and acetonitrile More preferred are toluene, N, N-dimethylformamide, N-methyl-2-pyrrolidinone, or a mixed solvent thereof.
- the reaction is preferably carried out in the absence of a base, but preferred bases when using a base include sodium carbonate, potassium carbonate, potassium hydrogen carbonate, triethylamine, pyridine and the like, and more preferably potassium carbonate.
- the amount of the acylating agent used is preferably 1.0 to 5.0 equivalents, more preferably 1.0 to 3.0 equivalents.
- the amount of the base used is preferably 1.0 to 5.0 equivalents, more preferably 1.0 to 3.0 equivalents.
- the reaction temperature is preferably in the range of ⁇ 80 ° C. to 40 ° C., more preferably ⁇ 30 ° C. to 30 ° C.
- the reaction time is preferably in the range of 0.1 hour to 7 days, and more preferably in the range of 0.5 hour to 8 hours.
- R 2 represents a chlorine atom
- trifluoroacetic acid, thionyl chloride, phosphorus oxychloride, oxalic acid dichloride and the like are simultaneously used outside the system for reacting with the compound represented by the formula (Aa).
- the produced R 1 COCl can also be used.
- Particularly preferred conditions are trifluoroacetic acid chloride as an acylating agent, toluene, N, N-dimethylformamide, N-methyl-2-pyrrolidinone or a mixed solvent thereof as a solvent, and the amount of acylating agent used is 1.0.
- the reaction temperature is ⁇ 30 ° C. to 30 ° C., and the reaction time is 0.5 hour to 8 hours. It is particularly preferable that the base is absent or that potassium carbonate is used when a base is used, and the equivalent number is 1.0 to 3.0 equivalents.
- the compound represented by the formula (Ba) can be obtained by the method described in Patent Document 3 and the like. That is, as a method for producing the compound represented by the formula (Ba) from the compound represented by the formula (Aa), the compound represented by the formula (Aa) is base-free in a solvent-free or solvent that does not affect the reaction. It can be obtained by reacting with a compound represented by the formula (Ca) (X, R 3 , R 4 have the same meaning as defined above) in the presence or absence.
- Usable solvents include ether solvents such as diethyl ether, diisopropyl ether, tetrahydrofuran and dioxane, N, N-dimethylformamide, dimethyl sulfoxide, N, N-dimethylacetamide, acetonitrile, N-methyl-2-pyrrolidinone, N -Aprotic polar organic solvents such as methyl-2-piperazinone and N, N-dimethyl-2-imidazolidinone, halogen solvents such as dichloromethane and chloroform, aromatic hydrocarbon solvents such as toluene, xylene and ethylbenzene, And a mixed solvent thereof, preferably an aprotic polar organic solvent. More preferred are N, N-dimethylformamide, N, N-dimethylacetamide and toluene.
- usable bases when using a base include sodium carbonate, potassium carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate, sodium hydroxide, potassium hydroxide, water Inorganic bases such as magnesium oxide, calcium hydroxide, lithium hydroxide, barium hydroxide, 1,8-diazabicyclo [5.4.0] undec-7-ene, 1,5-diazabicyclo [4.3.0] nona Organic bases such as -5-ene, triethylamine, diisopropylethylamine, pyridine, lutidine, N, N-dimethylaniline, N, N-diethylaniline, dimethylaminopyridine, and the like, preferably potassium carbonate, triethylamine, pyridine, etc. More preferably, triethylamine and potassium carbonate are preferable. It is.
- the amount of the base used is preferably 1.0 to 3.0 equivalents, more preferably 1.1 to 2.5 equivalents, relative to the compound represented by the formula (Aa).
- the reaction temperature is preferably in the range of ⁇ 20 ° C. to 150 ° C., more preferably ⁇ 10 ° C. to 100 ° C.
- the reaction time is preferably in the range of 0.1 hour to 7 days, more preferably 1 hour to 2 days.
- Usable solvents include ether solvents such as diethyl ether, diisopropyl ether, tetrahydrofuran and dioxane, N, N-dimethylformamide, dimethyl sulfoxide, N, N-dimethylacetamide, acetonitrile, N-methyl-2-pyrrolidinone, N -Aprotic polar organic solvents such as methyl-2-piperazinone and N, N-dimethyl-2-imidazolidinone, halogen solvents such as dichloromethane and chloroform, aromatic hydrocarbon solvents such as toluene, xylene and ethylbenzene, Examples include alcohol solvents such as methanol and ethanol, water, and mixed solvents thereof, preferably aromatic hydrocarbon solvents, aprotic polar organic solvents, or mixed solvents of alcohol solvents and water, More preferable , N, N-dimethylformamide and water, methanol and water or a mixed solvent of toluen
- the acid mineral acids such as hydrochloric acid, sulfuric acid, phosphoric acid and nitric acid can be used, and as the base, sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, sodium hydroxide, magnesium hydroxide, hydroxide Inorganic bases such as calcium, lithium hydroxide and barium hydroxide can be used.
- the reaction temperature is preferably in the range of ⁇ 20 ° C. to 150 ° C., more preferably 70 ° C. to 100 ° C.
- the reaction time is preferably in the range of 0.1 hour to 7 days, more preferably 1 hour to 8 hours.
- the compound represented by the formula (A) or the formula (Aa) is reacted with an acylating agent, a solvent, Ar—CH 2 —R 4 , and a base at a time to be represented by the formula (I) or the formula (Ia).
- Preferable examples for obtaining the compound include compounds represented by the formula (A) or the formula (Aa), aromatic hydrocarbon solvents such as toluene, xylene and ethylbenzene, N, N-dimethylformamide, dimethyl sulfoxide, N , N-dimethylacetamide, acetonitrile, N-methyl-2-pyrrolidinone, or an aprotic solvent or a mixed solvent thereof, acylation in which R 2 represents a C 1-6 alkoxy group optionally substituted with a halogen atom Agents, specifically, ethyl trifluoroacetate, methyl trifluoroacetate, propyl trifluoroacetate and the like are 1 for the compound represented by the formula (A) or (Aa).
- aromatic hydrocarbon solvents such as toluene, xylene and ethylbenzene
- N, N-dimethylformamide, dimethyl sulfoxide N , N-dimethylace
- the base is an inorganic base such as sodium carbonate, potassium carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate, sodium hydroxide, magnesium hydroxide, calcium hydroxide, lithium hydroxide, barium hydroxide, , 8-diazabicyclo [5.4.0] undec-7-ene, 1,5-diazabicyclo [4.3.0] non-5-ene, triethylamine, diisopropylethylamine, pyridine, picoline, dimethylaminopyridine, etc.
- inorganic base such as sodium carbonate, potassium carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate, sodium hydroxide, magnesium hydroxide, calcium hydroxide, lithium hydroxide, barium hydroxide, , 8-diazabicyclo [5.4.0] undec-7-ene, 1,5-diazabicyclo [4.3.0] non-5-ene, triethylamine, diisopropylethylamine, pyridine, picoline, dimethylaminopyr
- An alcoholate such as a base, sodium ethoxide, sodium methoxide, tert-butoxypotassium or the like is used in an amount of 1.0 to 10.0 equivalents relative to the compound represented by the formula (A) or (Aa), and Ar—CH 2 —R 4 was added 0.8 to 1.5 equivalents to the compound represented by the formula (a) or (Aa) 20 °C ⁇ 100 °C Allowed to react for 2 hours to 3 days, it is a method of obtaining a compound represented by formula (I) or formula (Ia).
- toluene, N, N-dimethylformamide, or a mixed solvent of toluene and N, N-dimethylformamide is used as the solvent
- ethyl trifluoroacetate is used as the acylating agent
- R of Ar—CH 2 —R 4 is used.
- the number of equivalents of the acylating agent is preferably 1.0 to 5.0 equivalents relative to the compound represented by the formula (I) or the formula (Ia) More preferably, 1.5 to 5.0 equivalents, Ar—CH 2 —R 4 equivalent number is 0.8 to 1.5 equivalents, Base equivalent number is 1.0 to 5.0 equivalents, Reaction The temperature is 40 ° C. to 80 ° C., and the reaction time is 4 hours to 2 days.
- the compound represented by the formula (I) and the compound represented by the formula (Ia) are usually used.
- the resulting crystallization method, solvent extraction method, column chromatography, and the like can be purified and isolated alone or in combination.
- the solvent used in the solvent extraction method is not particularly limited as long as it is a solvent that is not miscible with water, and specific examples include ethyl acetate, butyl acetate, toluene, ethylbenzene, diethyl ether, diisopropyl ether, dichloromethane, chloroform and the like.
- Solvents used for the crystallization method are water, hexane, toluene, acetone, N, N-dimethylformamide, methanol, 2-propanol, dichloromethane, chloroform, ethyl acetate, diethyl ether, xylene, N-methyl-2-pyrrolidinone, N, N-dimethylacetamide and the like and mixed solvents thereof can be mentioned.
- a preferred purification and isolation method of the compound represented by the formula (I) and the compound represented by the formula (Ia) is a crystallization method, and as a crystallization solvent, acetone, toluene, water, N, N-dimethylformamide, Methanol, xylene, N-methyl-2-pyrrolidinone, N, N-dimethylacetamide is preferably used alone or in combination, more preferably water, methanol, N, N-dimethylformamide, N-methyl-2-pyrrolidinone , N, N-dimethylacetamide.
- Synthesis Example 1 Synthesis of N- [1-((6-chloropyridin-3-yl) methyl) pyridine-2 (1H) -ylidene] -2,2,2-trifluoroacetamide (Compound 1) (1 ) 25 g (270 mmol) of 2-aminopyridine was dissolved in 200 ml of anhydrous dichloromethane, and 41 ml (30 g, 300 mmol) of triethylamine was added and cooled to 0 ° C. To this, 38 ml (57 g, 270 mmol) of trifluoroacetic anhydride was added dropwise over 15 minutes, followed by stirring at room temperature for 2 hours.
- reaction solution was poured into about 100 ml of ice water and stirred for 10 minutes.
- the organic layer was washed twice with 150 ml of water and twice with 150 ml of 1% aqueous HCL solution, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. 36 g (71% yield) of fluoro-N- (pyridine-2 (1H) -ylidene) acetamide was obtained.
- Powder X-ray crystal analysis In powder X-ray diffraction, it measured on condition of the following. Device name: RINT-2200 (Rigaku Corporation) X-ray: Cu-K ⁇ (40 kV, 20 mA) Scanning range: 4 to 40 ° Sampling width: 0.02 ° Scanning speed: 1 ° / min The results are as follows (FIG. 1). Diffraction angle (2 ⁇ ) 8.7 °, 14.2 °, 17.5 °, 18.3 °, 19.8 °, 22.4 °, 30.9 °, 35.3 °.
- DSC Differential scanning calorimetry
- Table 1 shows specific examples of the pesticides represented by the formula (I) produced according to the method of Synthesis Example 1 and their physical properties.
- Synthesis Example 2 Synthesis of 2,2,2-trifluoro-N- (pyridine-2 (1H) -ylidene) acetamide 1.0 g (10.6 mmol) of 2-aminopyridine was dissolved in 10 ml of ethyl acetate, and 1.78 ml of triethylamine ( 12.7 mmol) was added, and 1.62 ml (11.7 mmol) of trifluoroacetic anhydride was added under ice cooling. After stirring at room temperature for 2 hours, 10 ml of ethyl acetate and 10 ml of water were added, and the mixture was stirred and separated.
- Synthesis Example 3 Synthesis of 2,2,2-trifluoro-N- (pyridine-2 (1H) -ylidene) acetamide 4.7 g (50 mmol) of 2-aminopyridine was dissolved in 25 ml of N, N-dimethylformamide. 35.5 g (250 mmol) of ethyl fluoroacetate was added. After stirring at 55-60 ° C. for 15 hours, 100 ml of ethyl acetate and 100 ml of water were added, and the mixture was separated after stirring.
- Synthesis Example 4 Synthesis of N- [1-((6-chloropyridin-3-yl) methyl) pyridine-2 (1H) -ylidene] -2,2,2-trifluoroacetamide 2-aminopyridine 50.0 g (0.53 mol) was dissolved in 400 ml of toluene, and then cooled to 5 ° C, 88.6 ml (0.64 mol) of trifluoroacetic anhydride was added dropwise over 30 minutes. After dropping, the mixture was stirred at room temperature for 30 minutes, and 20 ml of toluene was distilled under reduced pressure.
- the reaction solution was added to 2 L of water at 50 ° C., and stirred for 30 minutes after the addition was completed. Thereafter, the mixture was filtered, and the slurry was washed with 200 ml of water and subsequently with 500 ml of water. After filtration, it was washed with 100 ml of toluene and further washed with 400 ml of toluene.
- the obtained crystals were dried under reduced pressure with a vacuum pump at 60 ° C. overnight, and the desired N- [1-((6-chloropyridin-3-yl) methyl) pyridine-2 (1H) -ylidene]- 147.78 g (88.1%) of 2,2,2-trifluoroacetamide was obtained.
- reaction solution was added to 1.1 L of water at 50 ° C., and the reaction vessel was washed with 150 ml of methanol and added. After completion of the addition, the mixture was heated at 50 ° C. for 10 minutes, gradually cooled, stirred at 15-20 ° C. for 30 minutes, filtered, and washed with 150 ml of water and subsequently with 150 ml of toluene. The obtained crystals were dried under reduced pressure with a vacuum pump at 60 ° C.
- reaction solution was added to 250 ml of water, and the reaction vessel was washed with 30 ml of methanol and 20 ml of water and added. After completion of the addition, the mixture was stirred at room temperature for 30 minutes, filtered, and washed with 50 ml of water and then with 40 ml of toluene.
- the obtained crystals were dried under reduced pressure with a vacuum pump at 80 ° C. for 11 hours to obtain the desired N- [1-((6-chloropyridin-3-yl) methyl) pyridine-2 (1H) -ylidene]- There was obtained 11.63 g (69.4%) of 2,2,2-trifluoroacetamide.
- Synthesis Example 17 Synthesis of N- [1-((6-chloropyridin-3-yl) methyl) pyridine-2 (1H) -ylidene] -2,2,2-trifluoroacetamide According to the method of Synthesis Example 16 After the synthesis, 4.6 g (0.02 mol) of 1-((6-chloropyridin-3-yl) methyl) pyridine-2 (1H) -imine obtained by neutralization was dissolved in 15 mL of N, N-dimethylformamide. Then, 5.7 g (0.04 mol) of ethyl trifluoroacetate was added. After stirring at 56 ° C. overnight, 60 mL of water was added and the precipitated crystals were collected by filtration. The obtained crystals were dried at 45 ° C. under reduced pressure to obtain 5.85 g (yield 92.8%) of the target compound.
- Synthesis Example 18 Synthesis of N- [1-((6-chloropyridin-3-yl) methyl) pyridine-2 (1H) -ylidene] -2,2,2-trifluoroacetamide According to the method of Synthesis Example 16 After synthesis, neutralize 1-((6-chloropyridin-3-yl) methyl) pyridine-2 (1H) -imine (2.2 g, 0.01 mol) dissolved in 6 mL of N, N-dimethylformamide. Under ice-cooling, 828 mg (0.006 mol) of potassium carbonate and 2.52 g (0.012 mol) of trifluoroacetic anhydride were added.
- Synthesis Example 20 Synthesis of N- [1-((6-chloropyridin-3-yl) methyl) pyridine-2 (1H) -ylidene] -2,2,2-trifluoroacetamide According to the method of Synthesis Example 16 After synthesis, neutralize 1-((6-chloropyridin-3-yl) methyl) pyridine-2 (1H) -imine (4.38 g, 0.02 mol) in 3 mL of N, N-dimethylformamide. 2.7 g (0.024 mol) of trifluoroacetic acid and 2.8 g (0.02 mol) of phosphorus pentoxide were added. After stirring at 120 ° C.
- the reaction solution was added to 120 mL of warm water at 50 ° C., allowed to cool to room temperature, and stirred for 1 hour.
- the crystals were filtered and washed with 50 mL water and 100 mL toluene.
- the obtained crystals were dried at 45 ° C. under reduced pressure to obtain 23.9 g (yield 75.9%) of the target compound.
- the reaction solution was added to 150 mL of hot water at 50 ° C., allowed to cool to room temperature, and stirred for 1 hour.
- the crystals were filtered and washed with 50 mL water and 50 mL toluene.
- the obtained crystals were dried at 45 ° C. under reduced pressure to obtain 13.78 g (yield: 87.5%) of the target compound.
- test pests are insects that have been raised indoors for a long period of time (susceptible strains), (I) in 2007 in Kumamoto prefecture, and (II) in 2005 in Fukuoka prefecture, and then insects that have been raised in the room. (Field collection system) was used.
- Compound 1 showed a mortality rate of 100% when treated with 0.05 mg / seedling and a mortality rate of 90% or more when treated with 0.005 mg / seedling for all strains.
- Compound 2 is treated with 0.01 mg / seedling and the death rate is 72% (susceptible strain) and (II) is 70%.
- Compound 19 is treated with 0.01 mg / seedling and the death rate is ( (Sensitive strain) 100%, (II) 93%.
- imidacloprid was found to have a death rate (susceptible strain) of 100%, (I) 40%, and (II) 60% by treating 0.05 mg / plant.
- Compound 1 has a high insecticidal activity against a green planthopper having low imidacloprid sensitivity.
- insects susceptible strains
- insects that have been bred in a room for a long period of time
- Compound 1 showed 100% mortality when treated with 0.01 mg / seedling, and 90% or more when treated with 0.005 mg / seedling for all strains.
- Compound 3 was treated with 0.01 mg / seedling, and the death rate was (susceptible line) 100% and (field collection line) 90%.
- imidacloprid was treated with 0.01 mg / seedling and the death rate (susceptible line) was 100% and (field collection line) was 50%.
- fipronil was treated with 0.01 mg / seedling and the death rate (susceptible strain) was 100% and (field collection strain) was 70%.
- imidacloprid is known to be inactivated by oxidative metabolism, and it may be one of the mechanisms of resistance acquisition. It is considered. The following experiment was conducted in order to confirm the effect on pests that acquired such resistance.
- Reagents were mixed in the following ratio in a 1.5 mL tube and reacted at 25 ° C. for 40 hours. After the reaction, 1 mL of acetone was added and stirred, and the resulting precipitate was removed by centrifugation at 12000 rpm for 5 minutes. The acetone in the supernatant was distilled off and injected into LC / MS for analysis.
- Compound 1 and Compound 9 showed a high acaricidal effect with a death rate of 80% or more.
- imidacloprid had a death rate of 4% at a treatment amount of 10 ppm.
- the compound 1 showed an effect of controlling the ticklet tick with a blood sucking inhibition rate of 91%.
- the 2-acyliminopyridine derivative represented by the above formula (I), which is useful as a pest control agent can be efficiently produced in a single pot and in a high yield as necessary.
- the amount required as a pest control agent can be stably supplied at low cost. Therefore, the present invention can greatly contribute to the field of pest control.
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Abstract
Description
下記反応式
に示されるように、
式(B)で表される化合物の1位窒素原子をさらにAr-CH2-R4を用いてアルキル化する工程を含む、方法を提供するものである。
下記反応式
(b)示差走査熱量分析(DSC)において、融点が155~158℃を示す。]。
(a)粉末X線回折において、少なくとも下記回折角(2θ)に回折角ピークを有する。回折角:8.6±0.2°、14.2±0.2°、17.5±0.2°、18.3±0.2°、19.7±0.2°、22.3±0.2°、30.9±0.2°、35.3±0.2°
(b)示差走査熱量分析(DSC)において、融点が155~158℃を示す。
本発明を以下のスキームに沿ってさらに詳細に説明する。
また、上記スキームに示される、式(B)で表される化合物は、後処理または単離することなく、次の工程に用いても良い。
式(A)で表される化合物は、市販されている化合物または例えば、Journal of labeled compounds &
radiopharmaceuticals(1987),24(2)119-123に記載の方法で得ることができる。
(1)R2がトリフルオロアセトキシ基を示す場合、具体的にはアシル化剤として無水トリフルオロ酢酸を用いる場合、好ましい溶媒としては、酢酸エチル、酢酸ブチルなどのエステル系溶媒、ジクロロメタン、クロロホルムなどのハロゲン系溶媒、トルエン、キシレン、エチルベンゼンなどの芳香族炭化水素系溶媒が挙げられ、より好ましくはトルエンである。反応は塩基非存在下で行うことが好ましいが、塩基を用いる場合に好ましい塩基としては、炭酸ナトリウム、炭酸カリウム、炭酸水素カリウム、トリエチルアミン、ピリジン等が挙げられ、より好ましくは炭酸カリウムである。アシル化剤の使用量は、好ましくは1.0~5.0当量であり、より好ましくは1.0~1.5当量である。塩基を使用する場合の塩基の使用量は、好ましくは1.0~4.5当量であり、より好ましくは1.0~3.0当量である。反応温度は、-20℃~50℃の範囲とすることが好ましく、より好ましくは-10℃~30℃である。反応時間は、0.1時間~7日間の範囲とすることが好ましく、0.5時間~4時間の範囲とすることがより好ましい。特に好ましい条件は、アシル化剤として無水トリフルオロ酢酸、溶媒としてトルエンを用い、アシル化剤の使用量は1.0~1.5当量であり、反応温度は-10℃~30℃、反応時間は0.5~4時間の条件である。塩基は非存在下であるか、塩基を用いる場合は炭酸カリウムを用い、その当量数は1.0~3.0当量を用いる条件である。
式(B)または式(B’)で表される化合物から式(I)または式(I’)で表される化合物を製造する方法としては、無溶媒あるいは反応に影響しない溶媒中で、式(B)または式(B’)で表される化合物に塩基存在下、Ar-CH2-R4(Ar、R4は上記で定義したことと同じ意味を表す)と反応させることで得ることができる。
式(A)または式(A’)で表される化合物から式(I)または式(I’)で表される化合物を合成する際、式Bまたは式(B’)で表される化合物を単離することなく、次工程を行い、式(I)または式(I’)で表される化合物を得ることが可能である。
ここで言う試薬の当量数とは、全て式(A)または式(A’)で表される化合物に対する当量数である。式(A)または式(A’)で表される化合物から式(B)または式(B’)で表される化合物を得るためには、R2がCF3COO基、OEt基、水酸基または塩素原子であるR1COR2、またはCF3COR2を用いるのが特に好ましい。
式(B)または式(B’)で表される化合物から式(I)または式(I’)で表される化合物を得るための特に好ましい条件は、R4が塩素原子、溶媒としてN,N-ジメチルホルムアミド、N―メチル-2-ピロリジノン、N,N-ジメチルアセトアミド、N,N-ジメチルホルムアミドとトルエンの混合溶媒、N,N-ジメチルホルムアミドとキシレンの混合溶媒、キシレンとN-メチル-2-ピロリジノンの混合溶媒またはキシレンとN,N-ジメチルアセトアミドの混合溶媒を用い、Ar-CH2-R4の使用量は、式(B)または式(B’)で表される化合物に対して0.8~1.5当量であり、反応温度は40℃~80℃、反応時間は1時間~2日間の条件であり、塩基は炭酸カリウムまたはトリエチルアミンを1.0~5.0当量を用いる条件である。
式(Ba)で表される化合物から式(Ia)で表される化合物を得る方法としては、無溶媒あるいは反応に影響しない溶媒中で、式(Ba)で表される化合物に塩基存在下または非存在下、アシル化剤R1aCOR2a(R1a、R2a上記で定義したことと同じ意味を表す)と反応させることで得ることができる。ここで言う試薬の当量数とは、全て式(Ba)で表される化合物に対する当量数である。
(1)R2がトリフルオロアセトキシ基を示す場合、具体的にはアシル化剤として無水トリフルオロ酢酸を用いる場合、好ましい溶媒としては、酢酸エチル、酢酸ブチルなどのエステル系溶媒、ジクロロメタン、クロロホルムなどのハロゲン系溶媒、トルエン、キシレン、エチルベンゼンなどの芳香族炭化水素系溶媒が挙げられ、より好ましくはトルエンである。反応は塩基非存在下で行うことが好ましいが、塩基を用いる場合に好ましい塩基としては、炭酸ナトリウム、炭酸カリウム、炭酸水素カリウム、トリエチルアミン、ピリジン等が挙げられ、より好ましくは炭酸カリウムである。アシル化剤の使用量は、好ましくは1.0~5.0当量であり、より好ましくは1.0~1.5当量である。塩基を使用する場合の塩基の使用量は、好ましくは1.0~4.5当量であり、より好ましくは1.0~3.0当量である。反応温度は、-20℃~50℃の範囲とすることが好ましく、より好ましくは-10℃~30℃である。反応時間は、0.1時間~7日間の範囲とすることが好ましく、0.5時間~4時間の範囲とすることがより好ましい。
式(I)で表わされる化合物および式(Ia)で表される化合物は、通常用いられる結晶化法、溶媒抽出法、カラムクロマトグラフィー等を単独、または、組み合わせることによって精製単離することができる。溶媒抽出法に用いられる溶媒は、水と混和しない溶媒であれば特に選ばないが、具体的には酢酸エチル、酢酸ブチル、トルエン、エチルベンゼン、ジエチルエーテル、ジイソプロピルエーテル、ジクロロメタン、クロロホルム等が挙げられる。結晶化法に用いられる溶媒は、水、ヘキサン、トルエン、アセトン、N,N-ジメチルホルムアミド、メタノール、2-プロパノール、ジクロロメタン、クロロホルム、酢酸エチル、ジエチルエーテル、キシレン、N-メチル-2-ピロリジノン、N,N-ジメチルアセトアミド等およびそれらの混合溶媒が挙げられる。
(1)2-アミノピリジン25g(270mmol)を無水ジクロロメタン200mlに溶解し、トリエチルアミン41ml(30g,300mmol)を加えて0℃に冷却した。ここに無水トリフルオロ酢酸38ml(57g,270mmol)を15分間かけて滴下し、室温で2時間攪拌した。反応終了後、反応液を約100mlの氷水に注ぎ込み、10分間攪拌した。分液ロートに移して分液を行い、有機層を150mlの水で2回、150mlの1%HCL水溶液で2回洗浄後、無水硫酸マグネシウムで乾燥、減圧濃縮して2,2,2-トリフルオロ-N-(ピリジン-2(1H)-イリデン)アセタミド36g(収率71%)を得た。
1H-NMR(CDCl3,δ,ppm):7.20(1H,m),7.83(1H,m),8.20(1H,d),8.35(1H,d),10.07(1H,brs)
13C-NMR(CDCl3,δ,ppm):115.3,115.5(q),121.6,139.1,147.9,149.5,155.3(q)
MS:m/z=191(M+H)。
1H-NMR(CDCl3,δ,ppm):5.57(2H,s),6.92(1H,td),7.31(1H,d),7.80(1H,td),7.87(1H,dd),7.99(1H,dd),8.48(2H,m)
13C-NMR(CDCl3,δ,ppm):53.8,115.5,117.2(q),122.1,124.7,130.0,139.2,140.0,142.5,149.7,151.8,158.9,163.5(q)
MS:m/z=316(M+H)。
粉末X線回折においては、以下の条件で測定した。
装置名:RINT-2200(株式会社リガク)
X線:Cu-Kα(40kV、20mA)
走査範囲:4~40° サンプリング幅:0.02° 走査速度:1°/分
結果は、以下の通りである(図1)。
回折角(2θ)8.7°、14.2°、17.5°、18.3°、19.8°、22.4°、30.9°、35.3°。
示差走査熱量分析においては、以下の条件で測定した。
装置名:DSC-60
試料セル:アルミニウム
温度範囲:50℃~250℃(昇温:10℃/分)
結果を、図2に示した。
化合物1(700mg)にヘキサン約25ml、酢酸エチル約25mlを加えて、湯浴で65℃に加熱して完全に溶解させた。これをゆっくり室温に戻して一晩放置した。析出した結晶をろ集し、少量のヘキサン:酢酸エチル=95:5の溶液で結晶を洗浄した。これをデシケーターに入れて2時間減圧下で乾燥させて、白色結晶349mgを得た。
回折角(2θ)8.5°、14.0°、17.3°、18.1°、19.6°、22.2°、30.8°、35.2°
示差走査熱量分析の結果は、図4に示した。
化合物1(1.0g)に2-プロパノール28 mlを加え、湯浴で65℃に加熱して完全に溶解させた。これをゆっくり室温に戻して一晩放置した。析出した結晶をろ集し、少量の2-プロパノールで洗浄後、デシケーターに入れて2時間減圧下で乾燥させて、白色結晶695mgを得た。
化合物1(700mg)にトルエン約30mlを加え、湯浴で65℃に加熱して完全に溶解させた。これをゆっくり室温に戻して一晩放置した。析出した結晶をろ集し、少量のトルエンで洗浄後、デジケーターに入れて2時間減圧下で乾燥させて、白色結晶440 mgを得た。
回折角(2θ)8.6°、14.2°、17.5°、18.3°、19.7°、22.3°、30.9°、35.3°
示差走査熱量分析の結果は、図7に示した。
化合物1(50mg)にメタノール約2ml、水約2mlを加え、湯浴で65℃に加熱して溶解させた。これを室温に戻して一晩放置した。析出した結晶をろ集して白色結晶16mgを得た。
表1に合成例1の方法に準じて製造された式(I)で示される有害生物防除剤の具体的な化合物例とその物性値を示す。
2-アミノピリジン1.0g(10.6mmol)を酢酸エチル10mlに溶解し、トリエチルアミン1.78ml(12.7mmol)を加えて、氷冷下、無水トリフルオロ酢酸1.62ml(11.7mmol)を添加した。その後室温で2時間攪拌後、酢酸エチル10mlと水10mlを加えて攪拌後分液した。酢酸エチル層をさらに水10mlで二回洗浄後、無水硫酸マグネシウムで乾燥し、減圧濃縮して、2,2,2-トリフルオロ-N-(ピリジン-2(1H)-イリデン)アセタミド 1.56g(77.2%)を得た。
2-アミノピリジン4.7g(50mmol)をN,N-ジメチルホルムアミド25mlに溶解し、トリフルオロ酢酸エチル35.5g(250mmol)を添加した。その後55~60℃で15時間攪拌後、酢酸エチル100mlと水100mlを加えて攪拌後分液した。酢酸エチル層をさらに水100mlおよび食塩水100mLで洗浄後、無水硫酸マグネシウムで乾燥し、減圧濃縮して、2,2,2-トリフルオロ-N-(ピリジン-2(1H)-イリデン)アセタミド 9.05g(95.6%)を得た。
1H-NMR(CDCl3,δ,ppm):
7.20(1H,ddd),7.83(1H,td),8.20(1H,d),8.35(1H,d),10.07(1H,brs)。
2-アミノピリジン 50.0g(0.53mol)をトルエン400mlに溶解後、5℃に冷却下、トリフルオロ酢酸無水物 88.6ml(0.64mol)を30分で滴下した。滴下後室温で30分攪拌し、減圧下トルエンを20ml蒸留した。反応液に、ジメチルホルムアミド250mlを加え、氷冷下、粉末炭酸カリウム88.2(0.64mol)gを徐々に加えた。その後、2-クロロ-5-クロロメチルピリジン89.2g(0.557mol)を加え、減圧(50-60hPa)下、40-45℃でトルエンを徐々に蒸留し、1時間加熱した。60-70℃、35hPaでさらに2.5時間加熱蒸留後、粉末炭酸カリウムを5.0g(0.036mol)加え、50-60℃、35hPaでさらに1時間水を除いた。反応液を、50℃の水2Lに添加し、添加終了後、30分攪拌した。その後、ろ過し、水200ml、続いて、水500mlでスラリー洗浄した。ろ過後、トルエン100mlで押し洗いをし、さらにトルエン400mlでスラリー洗浄した。得られた結晶を、60℃、一晩真空ポンプで減圧下乾燥し、目的とするN-〔1-((6-クロロピリジン-3-イル)メチル)ピリジン-2(1H)-イリデン〕-2,2,2-トリフルオロアセタミド 147.78g(88.1%)を得た。得られた表題化合物8.21gを取り、アセトン100mLに溶解し、これに水300mLを加えた。室温で撹拌して析出した結晶をろ取し、得られた結晶を60℃、一晩真空ポンプで減圧下乾燥し、7.28gを得た。得られた結晶の粉末X線結晶解析結果は、以下の通りである(図9)。
回折角(2θ)8.8°、14.3°、17.6°、18.3°、19.9°、22.5°、31.0°、35.4°
合成例5:N-〔1-((6-クロロピリジン-3-イル)メチル)ピリジン-2(1H)-イリデン〕-2,2,2-トリフルオロアセタミドの合成
2-アミノピリジン 50.0g(0.53mol)をトルエン250mlに溶解後、5℃に冷却下、トリフルオロ酢酸無水物 88.6ml(0.64mol)を30分で滴下した。滴下後室温で30分攪拌し、減圧下トルエンを20ml蒸留した。反応液に、ジメチルホルムアミド250mlを加え、氷冷下、粉末炭酸カリウム88.2g(0.64mol)を徐々に加えた。その後、2-クロロ-5-クロロメチルピリジン87.0g(0.54mol)を加え、減圧(50-60hPa)下、50-60℃でトルエンを徐々に蒸留し、さらに35hPaで加熱した。1時間後、粉末炭酸カリウムを5.0g(0.036mol)加え、50-60℃、35hPaで水を除いた。4時間後、反応液を、50℃の水1.1Lに添加し、反応容器をメタノール150mlで洗浄し追加添加した。添加終了後、50℃で10分加熱し、徐々に冷却し、15-20℃で30分攪拌後、ろ過し、水150ml、続いて、トルエン150mlで洗浄した。得られた結晶を、60℃、11時間真空ポンプで減圧下乾燥し、目的とするN-〔1-((6-クロロピリジン-3-イル)メチル)ピリジン-2(1H)-イリデン〕-2,2,2-トリフルオロアセタミド 147.32g(87.8%)を得た。
2-アミノピリジン 1.0g(10.6mmol)をトルエン10mlに溶解し、5℃に冷却後、トリフルオロ酢酸1.18ml(15.9mmol)、そして、オキシ塩化リン0.99ml(10.6mmol)を加え、室温下6.5時間攪拌した。反応液にジメチルホルムアミド5.0mlと粉末炭酸カリウム5.87g(42.5mmol)および2-クロロ-5-クロロメチルピリジン1.72g(10.6mmol)を加えて、減圧下(60-35hPa)、50-60℃で蒸留した。2.5時間後、反応液を100mlの水に添加し、結晶をろ過し、水30mlとトルエン15mlで洗浄した。得られた結晶を減圧下60℃乾燥して、目的とする化合物N-〔1-((6-クロロピリジン-3-イル)メチル)ピリジン-2(1H)-イリデン〕-2,2,2-トリフルオロアセタミドを2.09g(62.3%)得た。
2-アミノピリジン 10.0g(0.106mol)をトルエン100mlに溶解し、5℃に冷却後、トリフルオロ酢酸11.8ml(0.159mol)、そして、オキシ塩化燐9.9ml(0.106mol)を加え、室温下一晩攪拌し、減圧下、トルエンを20ml溜去した。反応液に氷冷下、ジメチルホルムアミド50mlと粉末炭酸カリウム35.28g(0.256mol)、および、2-クロロ-5-クロロメチルピリジン17.22g(0.106mol)を加えて、減圧下(60-35hPa)、50-60℃で蒸留した。2時間後、さらに、ジメチルホルムアミド25ml、トルエン20mlと粉末炭酸カリウム7.35g(0.053mol)を加えて、減圧下(60-35hPa)、50-60℃で2時間蒸留した。反応液にメタノール60mlと水50mlを加え、容器共に洗浄しながら反応液を、300mlの水に添加し、30分後、結晶をろ過し、水70mlとトルエン40mlで洗浄した。得られた結晶を減圧下60℃乾燥して、目的とする化合物を25.75g(76.9%)得た。
2-アミノピリジン 10.0g(0.106mol)をトルエン100mlに溶解し、5℃に冷却後、トリフルオロ酢酸11.8ml(0.159mol)、そして、チオニルクロライド7.7ml(0.106mol)を加え、室温下一晩攪拌し、減圧下、トルエンを20ml溜去した。反応液に氷冷下、ジメチルホルムアミド50ml、粉末炭酸カリウム35.28g(0.256mol)と2-クロロ-5-クロロメチルピリジン17.22g(0.106mol)を加えて、減圧下(36hPa)、50-60℃、一時間で蒸留した。反応液にメタノール60mlと水50mlを加え、容器共に洗浄しながら反応液を、300mlの水に添加し、30分後、結晶をろ過し、水70mlとトルエン40mlで洗浄した。得られた結晶を減圧下60℃で乾燥して、目的とする化合物を22.31g(66.6%)得た。
2-アミノピリジン 5.0g(0.053mol)をトルエン50mlに溶解後、5℃に冷却下、トリフルオロ酢酸無水物 8.86ml(0.064mol)を10分で滴下した。滴下後室温で30分攪拌し、減圧下トルエンを10ml蒸留した。反応液に、ジメチルホルムアミド25mlを加え、氷冷下、粉末炭酸カリウム8.82gを徐々に加えた。その後、2-クロロ-5-メタンスルホニルオキシメチルピリジン11.78g(0.053mol)を加え、減圧(50-60hPa)下、50-60℃でトルエンを徐々に蒸留し、さらに35hPaで加熱した。30分後、ジメチルホルムアミド30ml、トルエン30mlと2-クロロ-5-メタンスルホニルオキシメチルピリジン1.18g(0.0053mol)を加え、50-60℃、55hPaで減圧蒸留した。4時間後、反応液を、水250mlに添加し、反応容器をメタノール30mlと水20mlで洗浄し追加添加した。添加終了後、室温で30分攪拌した後、ろ過し、水50ml、続いて、トルエン40mlで洗浄した。得られた結晶を、80℃、11時間真空ポンプで減圧下乾燥し、目的とするN-〔1-((6-クロロピリジン-3-イル)メチル)ピリジン-2(1H)-イリデン〕-2,2,2-トリフルオロアセタミド11.63g(69.4%)を得た。
2-アミノピリジン 10.0g(0.106mol)をトルエン100mlに溶解し、5℃に冷却後、トリフルオロ酢酸11.84ml(0.159mol)、そして、オキシ塩化リン5.94ml(0.064mol)を加え、室温下一晩攪拌し、減圧下、トルエンを20ml溜去した。反応液に氷冷下、ジメチルホルムアミド50mlと粉末炭酸カリウム22.03g(0.16mol) 、および、2-クロロ-5-クロロメチルピリジン17.56g(0.108mol)を加えて、減圧下(60-35hPa)、50-60℃で蒸留した。1時間後、さらに、ジメチルホルムアミド20ml、トルエン20mlと粉末炭酸カリウム4.41g(0.032mol)を加えて、減圧下(60-35hPa)、50-60℃で1.5時間蒸留した。50℃の水250mlに、反応液にメタノール30mlを加えたものを添加し、そして水50mlを加え、容器も洗浄しながら添加し、室温に冷却後30分攪拌し、結晶をろ過し、水50mlとトルエン30mlで洗浄した。得られた結晶を減圧下60℃乾燥して、目的とする化合物を23.69g(70.6%)得た。
2-アミノピリジン 10.0g(0.106mol)をトルエン100mlに溶解し、5℃に冷却後、トリフルオロ酢酸11.8ml(0.159mol)、そして、チオニルクロライド7.76ml(0.106mol)を分割して加え、室温下一晩攪拌し、減圧下、トルエンを50ml溜去した。反応液にトルエン50mlを加え、氷冷下、ジメチルホルムアミド50ml、粉末炭酸カリウム22.03g(0.16mol)と2-クロロ-5-クロロメチルピリジン17.56g(0.108mol)を加えて、減圧下(90-36hPa)、60℃で、1.5時間で蒸留した。反応液にメタノール30mlと水20mlを加え、容器共に洗浄しながら反応液を、50℃の300mlの水に添加し、室温で30分攪拌後、結晶をろ過し、水50mlとトルエン30mlで洗浄した。得られた結晶を減圧下60℃で乾燥して、目的とする化合物を21.45g(64.1%)得た。
2-アミノピリジン 94g(1mol)をジメチルホルムアミド500mLに溶解し、トリフルオロ酢酸エチル284g(2mol)を加えて、55-60℃で24時間撹拌した。反応液に粉末炭酸カリウム82.8g(0.6mol)と2-クロロ-5-クロロメチルピリジン153.9g(0.95mol)及びトルエン300mLを加えて、減圧下(36hPa)、50-60℃、3時間撹拌した。反応液にメタノール200mLを添加した後、50℃の温水2Lに反応液を添加し、室温まで放冷した後、3時間撹拌した。結晶をろ過し、水400mL及びトルエン450mLで洗浄した。得られた結晶を減圧下45℃で乾燥して、目的とする化合物を228.9g(収率72.7%)得た。
2-アミノピリジン 9.4g(0.1mol)をジメチルホルムアミド30mL及びトルエン20mLの混合溶媒に溶解し、トリフルオロ酢酸エチル28.4g(0.2mol)を加えて、60-65℃で8時間撹拌した。反応液に粉末炭酸カリウム16.6g(0.12mol)と2-クロロ-5-クロロメチルピリジン16.2g(0.1mol)を加えて、60-65℃で15時間撹拌した。反応液にメタノール15mLを添加した後、50℃の温水120mLに反応液を添加し、室温まで放冷した後、2時間撹拌した。結晶をろ過し、水50mL及びトルエン100mLで洗浄した。得られた結晶を減圧下45℃で乾燥して、目的とする化合物を25.6g(収率81.2%)得た。
トリフルオロ酢酸13.68g(0.12mol)にジメチルホルムアミド1.5mLを添加し、65℃に加温しながらチオニルクロライド14.28g(0.12mol)を加えた。ここから発生するトリフルオロ酢酸クロライドを2-アミノピリジン9.4g(0.1mol)をN-メチルピロリジノン50mLに溶解して-10℃に冷却した溶液にバブリングし、1時間撹拌した。この反応液にトルエン100mLと粉末炭酸カリウム48.3g(0.35mol)と2-クロロ-5-クロロメチルピリジン16.52g(0.102mol)を加えて、減圧下(36hPa)、50-60℃、3時間で蒸留した。反応液にメタノール20mLを加え、容器共に洗浄しながら、50℃に加温した300mLの水に添加した。室温で1.5時間撹拌した後、結晶をろ過し、水100mL及びトルエン150mLで洗浄した。得られた結晶を減圧下45℃で乾燥して、目的とする化合物を16.8g(収率53.3%)得た。
トリフルオロ酢酸18.24g(0.16mol)にジメチルホルムアミド8.76g(0.12mol)を添加し、65℃に加温しながらオキシ塩化リン12.26g(0.08mol)を加えた。ここから発生するトリフルオロ酢酸クロライドを2-アミノピリジン9.4g(0.1mol)をN-メチルピロリジノン80mLに溶解して-15℃に冷却した溶液にバブリングし、2時間撹拌した。-10℃に冷却しながら、この反応液に粉末ナトリウムエトキシド14.9g(0.22mol)を加えて、中和した。この反応液に粉末炭酸カリウム13.8g(0.1mol)、及び2-クロロ-5-クロロメチルピリジン16.2g(0.1mol)を加えて、減圧下(36hPa)、50-60℃、2時間で蒸留した。反応液にメタノール20mLを加え、容器共に洗浄しながら、50℃に加温した400mLの水に添加した。室温で30分撹拌した後、結晶をろ過し、水100mL及びトルエン50mLで洗浄した。得られた結晶を減圧下45℃で乾燥して、目的とする化合物を22.5g(収率71.4%)得た。
2-クロロ-5-クロロメチルピリジン3.00g(18.6mmol)をジメチルホルムアミド20mlに溶解し、2-アミノピリジン1.75g(18.6mmol)を加えて80℃で8時間、室温で5時間攪拌した。反応終了後、ジメチルホルムアミドを減圧留去し、アセトニトリルを加えたところ固体が析出したので、ろ集し、アセトニトリルでよく洗浄後乾燥して1-〔(6-クロロピリジン-3-イル)メチル〕ピリジン-2(1H)-イミン塩酸塩2.07g(収率44%)を得た。
1H-NMR(DMSO-d6,δ,ppm):5.65(2H,s),6.96(1H,t),7.23(1H,m),7.57(1H,d),7.80(1H,m),7.91(1H,m),8.28(1H,m),8.49(1H,d)。
合成例16の方法に従って合成した後、中和して得た1-((6-クロロピリジン-3-イル)メチル)ピリジン-2(1H)-イミン4.6g(0.02mol)をN,N-ジメチルホルムアミド15mLに溶解し、トリフルオロ酢酸エチル5.7g(0.04mol)を加えた。56℃で終夜撹拌した後、水60mLを加えて析出した結晶をろ取した。得られた結晶を減圧下45℃で乾燥して、目的とする化合物を5.85g(収率92.8%)得た。
合成例16の方法に従って合成した後、中和して得た1-((6-クロロピリジン-3-イル)メチル)ピリジン-2(1H)-イミン2.2g(0.01mol)をN,N-ジメチルホルムアミド6mLに溶解し、氷冷下、炭酸カリウム828mg(0.006mol)及び無水トリフルオロ酢酸2.52g(0.012mol)を加えた。室温で1時間撹拌した後、水30mLを加えて析出した結晶をろ取した。得られた結晶を水20mLで洗浄した後、減圧下45℃で乾燥して、目的とする化合物を2.38g(収率75.6%)得た。
トリフルオロ酢酸4.56g(0.04mol)にN,N-ジメチルホルムアミド3mLを添加し、60℃に加温しながらオキシ塩化リン3.12g(0.02mol)を加えた。ここから発生するトリフルオロ酢酸クロライドを、合成例16の方法に従って合成した後、中和して得た1-((6-クロロピリジン-3-イル)メチル)ピリジン-2(1H)-イミン4.38g(0.02mol)をN-メチル-2-ピロリジノン25mLに溶解した溶液にバブリングし、-10℃で45分間反応させた。水125mLを加えて析出した結晶をろ取した。得られた結晶を減圧下45℃で乾燥して、目的とする化合物を2.58g(収率40.9%)得た。
合成例16の方法に従って合成した後、中和して得た1-((6-クロロピリジン-3-イル)メチル)ピリジン-2(1H)-イミン4.38g(0.02mol)をN,N-ジメチルホルムアミド3mLに溶解し、トリフルオロ酢酸2.7g(0.024mol)および五酸化リン2.8g(0.02mol)を加えた。120℃で3時間撹拌した後、室温に戻し、水50mLを加えて析出した結晶をろ取した。得られた結晶を減圧下45℃で乾燥して、目的とする化合物を2.12g(収率33.7%)得た。
2-アミノピリジン 9.4g(0.1mol)をジメチルホルムアミド50mLに溶解し、トリフルオロ酢酸エチル28.8g(0.2mol)と2-クロロ-5-クロロメチルピリジン16.2g(0.1mol)、および炭酸カリウム13.8g(0.1mol)を加えて、55-60℃で20時間撹拌した。反応液に更に粉末炭酸カリウム1.38g(0.1mol)と2-クロロ-5-クロロメチルピリジン3.24(0.02mol)、およびトリフルオロ酢酸エチル5.68g(0.04mol)を加えて、55-60℃で6時間撹拌した。反応液にメタノール40mLを添加した後、50℃の温水300mLに反応液を添加し、室温まで放冷した後、1時間撹拌した。結晶をろ過し、水100mL及びトルエン75mLで洗浄した。得られた結晶を減圧下45℃で乾燥して、目的とする化合物を24.0g(収率76%)得た。
2-アミノピリジン 9.4g(0.1mol)をジメチルホルムアミド30mLおよびトルエン20mLに溶解し、トリフルオロ酢酸エチル28.8g(0.2mol)と2-クロロ-5-クロロメチルピリジン16.2g(0.1mol)、および炭酸カリウム16.6g(0.12mol)を加えて、60-65℃で18時間撹拌した。反応液にメタノール15mLを添加した後、50℃の温水120mLに反応液を添加し、室温まで放冷した後、1時間撹拌した。結晶をろ過し、水50mL及びトルエン100mLで洗浄した。得られた結晶を減圧下45℃で乾燥して、目的とする化合物を23.9g(収率75.9%)得た。
2-アミノピリジン 4.7g(0.05mol)をN,N-ジメチルホルムアミド25mLとトルエン10mLの混合溶媒に溶解し、トリフルオロ酢酸エチル35.5g(0.25mol)と2-クロロ-5-クロロメチルピリジン9.72g(0.06mol)、および粉末炭酸カリウム8.28g(0.06mol)を加えて、65℃で18時間撹拌した。反応液にメタノール10mLを添加した後、50℃の温水150mLに反応液を添加し、室温まで放冷した後、1時間撹拌した。結晶をろ過し、水50mL及びトルエン50mLで洗浄した。得られた結晶を減圧下45℃で乾燥して、目的とする化合物を13.78g(収率87.5%)得た。
2-アミノピリジン 9.4g(0.1mol)をジメチルホルムアミド30mLおよびトルエン20mLに溶解し、トリフルオロ酢酸エチル14.2g(0.1mol)を加えて60-65℃で7時間撹拌した。続いて、2-クロロ-5-クロロメチルピリジン16.2g(0.1mol)、および炭酸カリウム16.6g(0.12mol)を加えて、60-65℃で18時間撹拌した。反応液にメタノール15mLを添加した後、50℃の温水150mLに反応液を添加し、室温まで放冷した。結晶をろ過し、水50mL及びトルエン75mLで洗浄した。得られた結晶を減圧下60℃で乾燥して、目的とする化合物を20.6g(収率65.4%)得た。
2-アミノピリジン 9.4g(0.1mol)をジメチルホルムアミド30mLおよびトルエン20mLに溶解し、トリフルオロ酢酸エチル7.1g(0.05mol)を加えて60-65℃で7.5時間撹拌した。減圧濃縮(90hPa、40℃)した後、氷冷し、トルエン20mL及び無水トリフルオロ酢酸10.5g(0.05mol)を加え、室温で1時間撹拌した。続いて、2-クロロ-5-クロロメチルピリジン16.2g(0.1mol)、ジメチルホルムアミド20mL、および炭酸カリウム16.6g(0.12mol)を加えて、110hPaの減圧下、60-65℃で4時間撹拌した。減圧濃縮(90hPa、50℃)した後、反応液にメタノール25mLを添加し、これを50℃の温水250mLに加えて、室温まで放冷しながら撹拌した。結晶をろ過し、水90mL及びトルエン90mLで洗浄した。得られた結晶を減圧下60℃で乾燥して、目的とする化合物を19.8g(収率62.9%)得た。
2-アミノピリジン 9.4g(0.1mol)をジメチルホルムアミド30mLおよびトルエン20mLに溶解し、トリフルオロ酢酸エチル21.3g(0.15mol)を加えて60-65℃で7.5時間撹拌した。減圧濃縮(90hPa、40℃)した後、氷冷し、トルエン20mL及び無水トリフルオロ酢酸10.5g(0.05mol)を加え、室温で1時間撹拌した。続いて、2-クロロ-5-クロロメチルピリジン16.2g(0.1mol)、ジメチルホルムアミド20mL、および炭酸カリウム16.6g(0.12mol)を加えて、110hPaの減圧下、60-65℃で4時間撹拌した。減圧濃縮(90hPa、50℃)した後、反応液にメタノール25mLを添加し、これを50℃の温水250mLに加えて、室温まで放冷しながら撹拌した。結晶をろ過し、水90mL及びトルエン90mLで洗浄した。得られた結晶を減圧下60℃で乾燥して、目的とする化合物を22.68g(収率72.0%)得た。
2-アミノピリジン 2.35g(0.025mol)をキシレン40mLに懸濁し、トリフルオロ酢酸2.85g(0.025mol)および塩化第二鉄6水和物135mgを加え、Dean-stark還流装置を付けて生成する水を除きながら150℃で16時間撹拌した。60℃まで冷却後、2-クロロ-5-クロロメチルピリジン4.05g(0.025mol)、ジメチルホルムアミド16mL、および炭酸カリウム2.42g(0.0175mol)を加えて、60-110hPaの減圧下、60-65℃で3時間撹拌した。反応液にメタノール10mLを添加し、これを50℃の温水80mLに加えて、室温まで放冷しながら撹拌した。結晶をろ過し、水20mL及びトルエン20mLで洗浄した。得られた結晶を減圧下60℃で乾燥して、目的とする化合物を 6.32g(収率80.3%)得た。
2-クロロ-3-フルオロ-5-メチルピリジン4.00g(27.6 mmol)を四塩化炭素80 mlに溶かし、N-ブロモスクシンイミド7.37g(41.4 mmol)、過酸化ベンゾイル20mgを加えて一晩加熱還流した。反応終了後、反応液を室温に戻して減圧濃縮し、シリカゲルカラムクロマトグラフィー(ヘキサン:酢酸エチル=19:1)で精製して5-(ブロモメチル)-2-クロロ-3-フルオロピリジン3.06g(収率51%)を得た。
1H-NMR(CDCl3,δ,ppm):4.45(2H,s),7.54(1H,dd),8.23(1H,s)。
1H-NMR(CDCl3,δ,ppm):5.54(2H,s),6.89(1H,td),7.76(1H,dd),7.80(1H,td),7.85(1H,d),8.29(1H,d),8.57(1H,d)
MS:m/z=334(M+H)。
2-ブロモ-5-メチルピリジン500 mg(2.92 mmol)を四塩化炭素15 mlに溶解し、N-ブロモスクシンイミド623 mg(3.50 mmol)、過酸化ベンゾイル10 mgを加えて19時間加熱還流した。反応終了後、反応液を室温に戻して減圧濃縮し、シリカゲルカラムクロマトグラフィー(ヘキサン;酢酸エチル=19:1)で精製して2-ブロモ-5-ブロモメチルピリジン143 mg(収率20%)を得た。
1H-NMR(CDCl3,δ,ppm):4.42(2H,s),7.47(1H,d),7.59(1H,dd),8.38(1H,d)。
1H-NMR(CDCl3,δ,ppm):5.52(2H,s),6.88(1H,t),7.48(1H,d),7.78(2H,m),7.84(1H,d),8.44(1H,d),8.53(1H,d)
MS:m/z=360(M+H)。
2-アミノピリジン200mg(2.13 mmol)をジクロロメタン5mlに溶解し、EDC-HCl491mg(2.55mmol)、ジメチルアミノピリジン 311 mg(2.55mmol)、クロロジフルオロ酢酸187μl(2.23mmol、290mg)の順に加えて一晩攪拌した。反応終了後、反応液をジクロロメタンで薄め、水、1%塩酸で洗浄後、無水硫酸マグネシウムで乾燥して2-クロロ-2,2-ジフルオロ-N-(ピリジン-2(1H)-イリデン)アセタミド105mg(収率24%)を得た。
1H-NMR(CDCl3,δ,ppm):7.19(1H,dd),7.82(1H,m),8.18(1H,d),8.36(1H,d),9.35(1H,brs)。
1H-NMR(CDCl3,δ,ppm):5.56(2H,s),6.92(1H,t),7.33(1H,d),7.82(1H,m),7.91(1H,dd),8.02(1H,d),8.45(1H,d),8.48(1H,d)
13C-NMR(CDCl3,δ,ppm):53.8,115.2,120.1(t),122.1,124.8,139.0,140.0,142.3,150.0,151.9,159.1,159.1,165.8(t)
MS:m/z=332(M+H)。
合成例16の方法で得られた1-〔(6-クロロピリジン-3-イル)メチル〕ピリジン-2(1H)-イミン塩酸塩70mg(0.27mmol)を無水ジクロロメタン4mlに懸濁し、トリエチルアミン94μl(0.68mmol、68mg)、トリクロロアセチルクロリド33μg(0.27mmol、49mg)の順に加えて室温で1時間攪拌した。反応終了後、水を加えて反応停止し、ジクロロメタンと水で分液した。有機層を水で1回、1%塩酸で2回洗浄後、無水硫酸マグネシウムで乾燥、減圧濃縮した。これにジエチルエーテルを加えたところ、固体が析出したので、ろ取、乾燥して目的物を得た。収量61mg(収率62%)。
1H-NMR(CDCl3,δ,ppm):5.59(2H,s),6.86(1H,t),7.32(1H,d),7.78(1H,td),7.91(2H,m),8.43(1H,d),8.50(1H,d)
MS:m/z=364(M+H)。
2-クロロ-5-メチルピリミジン1.04g(8.13mmol)を四塩化炭素30mlに溶かし、N-ブロモスクシンイミド1.73g(9.75mmol)、過酸化ベンゾイル20mgを加えて、6時間加熱還流した。反応終了後、反応液を室温に戻して減圧濃縮し、シリカゲルカラムクロマトグラフィー(ヘキサン:酢酸エチル=3:1)で精製して5-ブロモメチル-2-クロロピリミジン641mg(収率38%)を得た。
1H-NMR(CDCl3,δ,ppm):4.42(2H,s),8.66(2H,s)。
1H-NMR(CDCl3,δ,ppm):5.54(2H,s),6.98(1H,m),7.87(1H,m),8.18(1H,m),8.48(1H,m),8.83(2H,m)
13C-NMR(CDCl3,δ,ppm):60.0,115.6,117.1(q),122.1,127.5,139.2,142.9,158.8,160.3(2C),161.4,163.8(q)
MS:m/z=317(M+H)。
2-アミノピリジン300mg(3.19mmol)を無水ジクロロメタン15mlに溶解し、EDC-HCl919mg(4.78mmol)、DMAP583mg(4.78mmol)、ペンタフルオロプロピオン酸397μl(628mg、3.83mmol)の順に加えて室温で一晩攪拌した。反応終了後、反応液をジクロロメタンで薄め、水で1回、1%塩酸で2回洗浄後、無水硫酸マグネシウムで乾燥、減圧濃縮して2,2,3,3,3-ペンタフルオロ-N-(ピリジン-2(1H)-イリデン)プロパナミド85mg(収率11%)を得た。
1H-NMR(CDCl3,δ,ppm):5.56(2H,s),6.90(1H,td),7.32(1H,d),7.79(2H,m),7.84(1H,d),8.43(1H,d),8.56(1H,d)
MS:m/z=366(M+H)。
2-アミノピリジン400mg(4.26mmol)を無水ジクロロメタン10mlに溶解し、ジフルオロ酢酸322μl(490mg、5.11mmol)、EDC-HCl982 mg(5.10mmol)、DMAP622mg(5.11mmol)を加えて、室温で61時間攪拌した。反応終了後、反応液をジクロロメタンで薄め、水で1回、1%HClaq.で2回洗浄後、無水硫酸マグネシウムで乾燥、減圧濃縮して2,2-ジフルオロ-N-(ピリジン-2(1H)-イリデン)アセタミド 102mg(収率14%)を得た。
1H-NMR(CDCl3,δ,ppm):6.03(1H,t),7.15(1H,m),7.78(1H,td),8.20(1H,d),8.34(1H,dd),8.72(1H,brs)。
1H-NMR(CDCl3,δ,ppm):5.52(2H,s),5.90(1H,t),6.79(1H,td),7.33(1H,d),7.71(1H,m),7.77(1H,dd),7.85(1H,dd),8.45(1H,d),8.50(1H,d)
13C-NMR(DMSO-d6,δ,ppm):53.0,111.0(t),115.2,120.7,124.7,131.7,140.6,141.6,143.2,150.4,150.9,158.3,169.4(t)
MS:m/z=298(M+H)。
コナガ防除試験
ポット栽培のキャベツから直径5.0 cmのリーフディスクを切り抜き、これに50%アセトン水(0.05%Tween20加用)となるように調製した500 ppmの式(I)で表わされる化合物の薬液を散布した。風乾後、これに2令幼虫を放飼した。その後、これを25℃の恒温室(16時間明期-8時間暗期)に放置した。放飼3日後に虫の生死を観察し、次式に従って死虫率を算出した。試験は2連制により行った。
死虫率(%)={死亡虫数/(生存虫数十死亡虫数)}×100。
ワタアブラムシ防除試験
ポット栽培のキュウリから直径2.0 cmのリーフディスクを切り抜き、これに50%アセトン水(0.05%Tween20加用)となるように調製した500 ppmの式(I)で表わされる化合物の薬液を散布した。風乾後、これに1令幼虫を放飼した。その後、これを25℃の恒温室(16時間明期-8時間暗期)に放置した。放飼3日後に虫の生死を観察し、次式に従って死虫率を算出した。試験は2連制により行った。
死虫率(%)={死亡虫数/(生存虫数十死亡虫数)}×100。
ヒメトビウンカ防除試験
播種48時間後のコムギ苗根部を、10%アセトン水となるように調製した100 ppmの式(I)で表わされる化合物の薬液を200 μL処理した。72時間根部より薬剤を吸収させた後、これにヒメトビウンカ2令幼虫を10頭ずつ放飼した。その後、25℃の恒温室(16時間明期-8時間暗期)に放置した。放飼4日後に虫の生死を観察し、次式に従って死虫率を算出した。試験は2連制により行った。
死虫率(%)={死亡虫数/(生存虫数十死亡虫数)}×100。
参考例 トビイロウンカ防除試験
ポット栽培のイネ苗に、10%アセトン水となるように調製した所定濃度の本発明化合物の薬液を土壌潅注処理した。処理3日後、これに感受性、もしくは、薬剤低感受性トビイロウンカ2令幼虫を10頭ずつ放飼した。その後、25℃の恒温室(16時間明期-8時間暗期)に放置した。放飼3日後に虫の生死を観察し、次式に従って死虫率を算出した。試験は2連制により行った。
死虫率(%)={死亡虫数/(生存虫数十死亡虫数)}×100。
ポット栽培のイネ苗に、10%アセトン水となるように調製した所定濃度の本発明化合物の薬液を土壌潅注処理した。処理3日後、これに感受性、もしくは、薬剤低感受性ヒメトビウンカ2令幼虫を10頭ずつ放飼した。その後、25℃の恒温室(16時間明期-8時間暗期)に放置した。放飼3日後に虫の生死を観察し、次式に従って死虫率を算出した。試験は2連制により行った。
死虫率(%)={死亡虫数 /(生存虫数十死亡虫数)}×100。
Pest Management
Science(2003),59(3),347-352、およびJournal of Pesticide
Science(2004),29(2),110-116に記載されているように、イミダクロプリドは酸化的な代謝を受け、不活化されることが知られており、抵抗性獲得の機構のひとつとしても考えられている。このような抵抗性を獲得した害虫に対する効果を確認するために以下の実験を行った。
化合物1のDMSO溶液:5μL
グルコース6リン酸溶液:5μL
NADP+溶液:5μL
グルコース6リン酸デヒドロゲナーゼ溶液:5μL
リン酸カリウム緩衝液(pH7.4, 1 mM
EDTA含有):180μL。
カラム:カプセルパックC18 MG
移動相組成:
0~3分:85%水、5%アセトニトリル、10%ギ酸水溶液(0.1v/v%)
3~30分:85→25%水、5→65%アセトニトリル、10%ギ酸水溶液(0.1v/v%)
30.1~36分:90%アセトニトリル、10%ギ酸水溶液(0.1v/v%)
カラム温度:40℃ 流速:0.35 mL/分 注入量:100 μL
UV波長:化合物1:325nm
:イミダクロプリド:300nm。
参考例 フタトゲチマダニ防除試験
本発明の化合物の200ppm、10ppmのアセトン溶液30μLを、4mL容ガラスバイアルに入れた。これをシェーカーに載せて、回転させながら風乾してバイアル内壁に化合物のドライフィルムを形成させた。24時間以上、バイアルを乾燥させた後、これにフタトゲチマダニ幼ダニ10頭を放飼して、蓋をした。バイアルは、25℃、湿度85%、全暗条件の恒温室に静置した。放飼1日後に生死を観察し、次式に従って死虫率を算出した。試験は、2連制により行った。
死虫率(%)={死亡虫数/(生存虫数十死亡虫数)}×100。
マウス(ICR、雄、5週令)の背面体毛を直径約2cm刈り、そこに高さ約1.5cmに切取った15mLポリスチレンコニカルチューブを、瞬間接着剤を用いて接着した。
処方〔液化滴剤〕
化合物1 48重量%
エタノール 52重量%
上記成分を均一に混合して液化滴剤を得た。
吸血阻害率(%)=100-{吸血ダニ数/(生存ダニ数十死亡ダニ数)}×100。
Claims (16)
- 下記式(I)で表される化合物の製造方法であって、
[式中、Arは、置換されていてもよいフェニル基、または置換されていてもよい5~6員のヘテロ環を示し、R1は置換されていてもよいC1-6のアルキル基、Yは水素原子、ハロゲン原子、水酸基、ハロゲン原子により置換されていてもよいC1-6アルキル基、ハロゲン原子により置換されていてもよいC1-6アルキルオキシ基、シアノ基、ホルミル基、ニトロ基を示す]、
下記反応式に示されるように、
式(A)で表される化合物(Yは上記と同じ意味を表す)の2位アミノ基を、R1COR2(ここで、R1は上記と同じ意味を表し、R2は、(1)トリフルオロアセトキシ基、(2)ハロゲン原子で置換されていてもよいC1-6アルキルオキシ基、またはフェニル基がハロゲン原子、メチル基、シアノ基、ニトロ基、メトキシ基により置換されていてもよいベンジルオキシ基、(3)ハロゲン原子で置換されていてもよいC1-6アルキルカルボニルオキシ基(但し、トリフルオロアセトキシ基を除く)、フェニル基がハロゲン原子、メチル基、シアノ基、ニトロ基、メトキシ基により置換されていてもよいフェニルカルボニルオキシ基、(4)水酸基、(5)ハロゲン原子を表す)で示されるアシル化剤を用いて、縮合剤、五酸化リン、硫酸、ポリリン酸、チオニルクロリド、オキシ塩化リンまたはシュウ酸ジクロライドの存在下又は非存在下で、アシル化することによって式(B)で表される化合物を製造する工程、および
式(B)で表される化合物の1位窒素原子をさらにAr-CH2-R4(ここで、Arは上記と同じ意味を表し、R4はハロゲン原子、ハロゲン原子で置換されていてもよいC1-6アルキルスルホキシ基、ハロゲン原子またはメチル基で置換されていてもよいフェニルスルホキシ基を表す)を用いてアルキル化する工程を含んでなる、方法。 - Arが6-クロロ-3-ピリジル基であり、Yが水素原子である請求項1に記載の方法。
- 下記式(Ia)で表される化合物の製造方法であって
[式中、R3は、ハロゲン原子、シアノ基、ニトロ基、トリフルオロメチル基を示し、Xは炭素原子または窒素原子を示し、R1aはハロゲンに置換されたC1-6アルキル基を示す]、
下記反応式に示されるように、
式(Aa)で表される化合物の1位窒素原子を、式(Ca)で表される化合物(ここで、R3、Xは上記と同じ意味を表し、R4はハロゲン原子、ハロゲン原子で置換されていてもよいC1-6アルキルスルホキシ基、ハロゲン原子またはメチル基で置換されていてもよいフェニルスルホキシ基を表す)を用いてアルキル化することによって式(Ba)で表される化合物を製造する工程、および
式(Ba)で表される化合物のイミノ基を、R1aCOR2a(ここで、R1aは上記と同じ意味を表し、R2aは、(1)トリフルオロアセトキシ基、(2)ハロゲン原子で置換されていてもよいC1-6アルキルオキシ基、またはフェニル基がハロゲン原子、メチル基、シアノ基、ニトロ基、メトキシ基により置換されていてもよいベンジルオキシ基、(3)ハロゲン原子で置換されていてもよいC1-6アルキルカルボニルオキシ基(但し、トリフルオロアセトキシ基を除く)、フェニル基がハロゲン原子、メチル基、シアノ基、ニトロ基、メトキシ基により置換されていてもよいフェニルカルボニルオキシ基、(4)水酸基、(5)ハロゲン原子を表す)で示されるアシル化剤を用いて、縮合剤、五酸化リン、硫酸、ポリリン酸、チオニルクロライド、オキシ塩化リンまたはシュウ酸ジクロライドの存在下又は非存在下で、アシル化する工程を含んでなる、方法。 - R3が6-クロロ基であり、Xが炭素原子である、請求項3に記載の方法。
- R1COR2およびAr-CH2-R4を一度に加える、請求項1または2に記載の方法。
- R1aCOR2aおよび式(Ca)で表される化合物を一度に加える、請求項3または4に記載の方法。
- R1またはR1aがトリフルオロメチル基である、請求項1から6のいずれか一項に記載の方法。
- R1またはR1aがトリフルオロメチル基であり、R2またはR2aがトリフルオロアセトキシ基、エトキシ基、水酸基、塩素原子である、請求項1から6のいずれか一項に記載の方法。
- R1COR2またはR1aCOR2aは、無水トリフルオロ酢酸、トリフルオロ酢酸、トリフルオロ酢酸エチル、トリフルオロ酢酸クロライド及び混合酸無水物からなる群から選択される少なくとも一のアシル化剤であり、式(A)で表される化合物または式(Ba)で表される化合物に対して、1.0~5.0当量を用いる請求項1から6のいずれか一項に記載の方法。
- R1COR2またはR1aCOR2aが無水トリフルオロ酢酸であり、式(A)で表される化合物または式(Ba)で表される化合物に対して、1.0~1.5当量を用いる請求項1から6のいずれか一項に記載の方法。
- R1COR2またはR1aCOR2aがトリフルオロ酢酸エチルであり、式(A)で表される化合物または式(Ba)で表される化合物に対して、1.0~5.0当量を用いる請求項1から6のいずれか一項に記載の方法。
- R1COR2またはR1aCOR2aがトリフルオロ酢酸クロライドであり、式(A)で表される化合物または式(Ba)で表される化合物に対して、1.0~3.0当量を用いる請求項1から6のいずれか一項に記載の方法。
- R1COR2またはR1aCOR2aがトリフルオロ酢酸であり、式(A)で表される化合物または式(Ba)で表される化合物に対して、1.0~3.0当量を用い、
さらにチオニルクロリド、オキシ塩化リン、パラトルエンスルホン酸、三フッ化ホウ素、および鉄、コバルト、銅、ニッケル、亜鉛、アルミニウム、リチウムまたはマグネシウムのハロゲン化物、硫酸塩、硝酸塩または酸化物からなる群から選択される少なくとも1つの化合物を、前記トリフルオロ酢酸と同時に用いる請求項1から6のいずれか一項に記載の方法。 - 請求項1に記載の方法により製造された下記式(I’)で示される化合物、またはその塩
[ここで、R2は、(1)トリフルオロアセトキシ基、(2)ハロゲン原子で置換されていてもよいC1-6アルキルオキシ基、またはフェニル基がハロゲン原子、メチル基、シアノ基、ニトロ基、メトキシ基により置換されていてもよいベンジルオキシ基、(3)ハロゲン原子で置換されていてもよいC1-6アルキルカルボニルオキシ基(但し、トリフルオロアセトキシ基を除く)、フェニル基がハロゲン原子、メチル基、シアノ基、ニトロ基、メトキシ基により置換されていてもよいフェニルカルボニルオキシ基、(4)水酸基、(5)ハロゲン原子を表し、式(I’)で示される化合物は、以下の(a)あるいは(b)、または(a)および(b)の物性を有するN-〔1-((6-クロロピリジン-3-イル)メチル)ピリジン-2(1H)-イリデン〕-2,2,2-トリフルオロアセタミドである。
(a)粉末X線回折において、少なくとも下記回折角(2θ)に回折角ピークを有する。回折角:8.6±0.2°、14.2±0.2°、17.5±0.2°、18.3±0.2°、19.7±0.2°、22.3±0.2°、30.9±0.2°、35.3±0.2°
(b)示差走査熱量分析(DSC)において、融点が155~158℃を示す。]。 - R1がトリフルオロメチル基であり、Yが水素原子である、請求項15に記載の化合物。
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| EP17200356.8A EP3318554B1 (en) | 2011-08-26 | 2012-08-24 | Method for producing pest control agent |
| BR122019001978A BR122019001978A8 (pt) | 2011-08-26 | 2012-08-24 | Método para a produção de agente de controle de praga |
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| NZ623022A NZ623022B2 (en) | 2011-08-26 | 2012-08-24 | Method for producing pest controlling agent |
| BR112014004268A BR112014004268A8 (pt) | 2011-08-26 | 2012-08-24 | método para a produção de agente de controle de praga |
| PL17200356T PL3318554T3 (pl) | 2011-08-26 | 2012-08-24 | Sposób wytwarzania środka do zwalczania szkodników |
| KR1020147002461A KR20140054004A (ko) | 2011-08-26 | 2012-08-24 | 유해 생물 방제제의 제조방법 |
| EP12828367.8A EP2749555B1 (en) | 2011-08-26 | 2012-08-24 | Method for producing pest controlling agent |
| JP2013531274A JP6092778B2 (ja) | 2011-08-26 | 2012-08-24 | 有害生物防除剤の製造法 |
| AU2012302922A AU2012302922A1 (en) | 2011-08-26 | 2012-08-24 | Method for producing pest controlling agent |
| ZA2014/00602A ZA201400602B (en) | 2011-08-26 | 2014-01-24 | Method for producing pest control agent |
| IL230737A IL230737A0 (en) | 2011-08-26 | 2014-01-30 | A method for producing a pesticide |
| MA36841A MA35447B1 (fr) | 2011-08-26 | 2014-03-20 | Procédé de production d'un agent de lutte contre les ravageurs |
| US15/141,960 US9883673B2 (en) | 2011-08-26 | 2016-04-29 | Method for producing pest control agent |
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| US9975851B2 (en) | 2014-03-10 | 2018-05-22 | Meiji Seika Pharma Co., Ltd. | Method for producing 2-acyliminopyridine derivative |
| TWI650314B (zh) * | 2014-03-10 | 2019-02-11 | 日商明治製菓藥業股份有限公司 | 2-醯基亞胺吡啶衍生物之製造方法 |
| CN105980360A (zh) * | 2014-03-10 | 2016-09-28 | 明治制果药业株式会社 | 2-酰基亚胺吡啶衍生物的制造方法 |
| CN105980360B (zh) * | 2014-03-10 | 2019-03-15 | 明治制果药业株式会社 | 2-酰基亚胺吡啶衍生物的制造方法 |
| WO2015137216A1 (ja) * | 2014-03-10 | 2015-09-17 | Meiji Seikaファルマ株式会社 | 2-アシルイミノピリジン誘導体の製造法 |
| WO2018052115A1 (ja) | 2016-09-16 | 2018-03-22 | Meiji Seikaファルマ株式会社 | 有害生物防除剤の最適化製造法 |
| KR20190051952A (ko) | 2016-09-16 | 2019-05-15 | 메이지 세이카 파루마 가부시키가이샤 | 유해 생물 방제제의 최적화된 제조방법 |
| US20190270709A1 (en) * | 2016-09-16 | 2019-09-05 | Meiji Seika Pharma Co., Ltd. | Optimized production method for pest control agent |
| EP4089075A1 (en) | 2016-09-16 | 2022-11-16 | MMAG Co., Ltd. | Optimized production method for pest control agent |
| WO2020215094A1 (en) | 2019-04-18 | 2020-10-22 | The Johns Hopkins University | Substituted 2-amino-pyrazolyl-[1,2,4]triazolo[1,5a] pyridine derivatives and use thereof |
| WO2024024961A1 (ja) | 2022-07-29 | 2024-02-01 | 住友ファーマ株式会社 | 2(1h)-ピリジンイミン誘導体 |
| KR20250043464A (ko) | 2022-07-29 | 2025-03-28 | 스미토모 파마 가부시키가이샤 | 2(1h)-피리딘이민 유도체 |
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