Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C41/00—Preparation of ethers; Preparation of compounds having groups, groups or groups
  • C07C41/01—Preparation of ethers
  • C07C41/18—Preparation of ethers by reactions not forming ether-oxygen bonds
  • C07C41/24—Preparation of ethers by reactions not forming ether-oxygen bonds by elimination of halogens, e.g. elimination of HCl
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D249/00—Heterocyclic compounds containing five-membered rings having three nitrogen atoms as the only ring hetero atoms
  • C07D249/02—Heterocyclic compounds containing five-membered rings having three nitrogen atoms as the only ring hetero atoms not condensed with other rings
  • C07D249/08—1,2,4-Triazoles; Hydrogenated 1,2,4-triazoles
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C67/00—Preparation of carboxylic acid esters
  • C07C67/30—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group
  • C07C67/31—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by introduction of functional groups containing oxygen only in singly bound form
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
  • C07C69/66—Esters of carboxylic acids having esterified carboxylic groups bound to acyclic carbon atoms and having any of the groups OH, O—metal, —CHO, keto, ether, acyloxy, groups, groups, or in the acid moiety
  • C07C69/73—Esters of carboxylic acids having esterified carboxylic groups bound to acyclic carbon atoms and having any of the groups OH, O—metal, —CHO, keto, ether, acyloxy, groups, groups, or in the acid moiety of unsaturated acids
  • C07C69/734—Ethers
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
  • Y02P20/00—Technologies relating to chemical industry
  • Y02P20/50—Improvements relating to the production of bulk chemicals
  • Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts

Definitions

• the present invention relates to a method for producing an azole derivative, a bromohydrin derivative and a method for producing the same, and a method for producing 1-chloro-3- (4-chlorophenoxy) benzene.
• Patent Document 1 An azole fungicide is known as an agricultural and horticultural agent showing a high control effect.
• Patent Document 1 As a method for synthesizing the compound described in Patent Document 1, a plurality of synthetic methods via a phenylpyruvic acid ester derivative are disclosed in Patent Document 1. More specifically, (1) a method for obtaining a phenylpyruvic acid ester derivative by oxidation and esterification of an acetophenone derivative, (2) a method for reaching a phenylpyruvic acid ester derivative by acylation by a Friedel-Crafts reaction, and (3). ) A method of phenylpyruvic acid ester derivative by reaction of an organic metal reagent produced by a metal exchange reaction of a halobenzene compound with dialkyl oxalate or alkyl chloroglioxylate is shown.
• the present invention has been made in view of the above problems, and an object of the present invention is to provide a novel method for producing an azole derivative that can solve the above problems.
• the method for producing an azole derivative according to the present invention is a method for producing an azole derivative represented by the general formula (I) in order to solve the above-mentioned problems.
• A is N or CH
• R 1 is C 1 -C 6 - alkyl group.
• An organometallic reagent produced by a metal exchange reaction from 1-bromo-2-chloro-4- (4-chlorophenoxy) benzene is reacted with a bromopyruvic acid derivative represented by CH 2 BrCOCOOR 1 to form a general formula (1).
• R 1 is the same as R 1 in formula (I).
• the method comprises the step of reacting the bromohydrin derivative with imidazole or 1,2,4-triazole or an alkali metal salt thereof to obtain the azole derivative.
• the production cost can be suppressed as compared with the conventional production method.
• the method for producing an azole derivative according to the present embodiment is a method for producing an azole derivative represented by the following general formula (I) (hereinafter referred to as an azole derivative (I)).
• A is N or CH, preferably N.
• R 1 C 1 -C 6 - alkyl group.
• C 1 -C 6 - alkyl group is a straight chain or branched chain alkyl group with a carbon number 1-6, for example, a methyl group, an ethyl group, a 1-methylethyl group, 1,1-dimethyl Ethyl group, propyl group, 1-methylpropyl group, 2-methylpropyl group, 1,1-dimethylpropyl group, 2,2-dimethylpropyl group, 1-ethylpropyl group, butyl group, 1-methylbutyl group, 2- Methylbutyl group, 3-methylbutyl group, 3,3-dimethylbutyl group, 2,2-dimethylbutyl group, 1,1-dimethylbutyl group, 1-ethylbutyl group, 2-ethylbutyl group, pentyl group, 1-methylpentyl group , 2-Methylpentyl group, 3-methylp
• the method for producing the azole derivative (I) according to the present embodiment is as shown in the following synthesis scheme 1, from 1-bromo-2-chloro-4- (4-chlorophenoxy) benzene to bromohydrin represented by the general formula (II). It includes a step of obtaining a derivative and a step of obtaining an azole derivative (I) by azoled the obtained bromohydrin derivative.
• Step 1 From 1-bromo-2-chloro-4- (4-chlorophenoxy) benzene represented by the formula (III) (hereinafter referred to as compound (III)), it is represented by the general formula (II).
• a bromohydrin derivative (hereinafter referred to as a bromohydrin derivative (II)) is obtained.
• an organometallic reagent produced from compound (III) by a metal exchange reaction is reacted with a bromopyruvic acid derivative represented by CH 2 BrCOCOOR 1 in a solvent to obtain a bromohydrin derivative (II).
• Examples of the metal exchange reagent used in the metal exchange reaction include methyllithium, butyllithium, isopropylmagnesium chloride, isopropylmagnesium chloride-lithium chloride complex and the like, and isopropylmagnesium chloride-lithium chloride complex is preferably used.
• Examples of the solvent include tetrahydrofuran, 2-methyltetrahydrofuran, 4-methyltetrahydropyran, cyclopentyl methyl ether, diethyl ether, methyl tertiary butyl ether, cyclopentyl methyl ether and the like, and tetrahydrofuran is preferably used.
• the reaction in step 1 can be carried out at a temperature of ⁇ 30 to 50 ° C., preferably ⁇ 10 to 30 ° C.
• the metal exchange reaction gives the maximum amount of organometallic reagent in a reaction time of 5 minutes to 3 hours, but preferably gives the maximum amount of organometallic reagent in 30 minutes to 2 hours.
• the solution of the organometallic reagent can be added to the solution of the bromopyruvic acid derivative in a separate container, or the bromopyruvic acid derivative can be added to the solution of the organometallic reagent.
• the bromopyruvic acid derivative is added to the solution of the organometallic reagent.
• Step 2 The bromohydrin derivative (II) is azoled by reacting it with imidazole or 1,2,4-triazole or an alkali metal salt thereof in a solvent to obtain an azole derivative (I). .. Specifically, compound (II), imidazole or 1,2,4-triazole and a base are reacted in an organic solvent, or compound (II) and imidazole or 1,2,4-triazole alkali. The metal salt is reacted with an organic solvent to obtain an azole derivative (I).
• Examples of the reagent used for the azole reaction include a combination of imidazole or 1,2,4-triazole and sodium carbonate, or a sodium salt of imidazole or 1,2,4-triazole, and the like, preferably 1, A sodium salt of 2,4-triazole is used.
• Examples of the solvent include dimethylformamide, dimethylacetamide, N-methylpyrrolidone and the like, and dimethylformamide is preferably used.
• the reaction in step 2 can be carried out at a temperature of 0 to 150 ° C, preferably 40 to 80 ° C.
• the method for producing the azole derivative (I) in the present embodiment it is not necessary to use expensive iodine or methyl iodide required by the conventional method. Therefore, the manufacturing cost can be suppressed as compared with the conventional method. Further, in the conventional method, there has been a problem that a large amount of inorganic salt is produced as a by-product and an odor is generated by the DMSO decomposition product. However, according to the production method according to the present embodiment, the by-product of the inorganic salt is generated. And problems such as the generation of odor due to DMSO decomposition products can be avoided.
• compound (III) is obtained by reacting 1-chloro-3- (4-chlorophenoxy) benzene represented by the formula (IV) with a brominating agent.
• a brominating agent such as N-bromosuccinimide and 1,3-dibromo-5,5-dimethylhydantoin.
• the amount of bromine or bromine compound used are 1 to 3 equivalents, but it is preferable to use 1 to 1.3 equivalents in terms of cost.
• a bromine compound having two reactive bromines in the molecule such as 1,3-dibromo-5,5-dimethylhydantoin
• the solvent include acetonitrile and acetic acid, but it is most preferable to carry out the reaction without a solvent in terms of cost.
• the brominating agent is a bromine compound
• a small amount of iodine or bromine can be added as a catalyst, if necessary.
• the bromination reaction can be carried out at a temperature of ⁇ 20 to 70 ° C., but in order to selectively obtain compound (III), it is preferable to carry out the reaction in the range of 0 to 30 ° C.
• the reaction solution may solidify as the production of compound (III) having a low melting point progresses. Therefore, when brominating without a solvent, starting the reaction at around 0 ° C. and gradually raising the temperature to about 30 ° C. as the reaction progresses improves the selectivity of compound (III). It is valid.
• the 1-chloro-3- (4-chlorophenoxy) benzene used in this embodiment is 1-bromo-2,4-dichlorobenzene and 1-bromo-2- used in the method described in Patent Document 2. It is a compound that is much cheaper (price of about 1/400 to 1/500) than chloro-4-fluorobenzene. Therefore, according to the method of the present embodiment, it is possible to suppress an increase in production cost.
• the target compound (III) can be obtained with high selectivity such as 93% or more, 95% or more, or 97% or more.
• compound (V) 1-bromo-4-chloro-2- (4-chlorophenoxy) benzene (hereinafter referred to as compound (V)) represented by the following formula (V), which is a positional isomer of compound (III), is also present. Generated.
• the compound (III) can be purified from the mixture containing the compound (V) by performing repulp washing with an alcohol-based solvent before subjecting it to the reaction of the synthesis scheme 1.
• the repulp washing may be carried out on the solid obtained by post-treating the reaction mixture obtained by the reaction according to the synthesis scheme 2.
• the brominating agent is bromine
• the solid substance obtained by concentrating the reaction mixture can be used as it is, which is advantageous. It is preferable that the solid matter is crushed using a mortar or pestle before being subjected to repulp washing.
• the alcohol solvent include 2-propanol, ethanol, methanol and the like, and 2-propanol is preferably used.
• the solid after washing with repulp may be dried under reduced pressure and used as compound (III) in step 2.
• the proportion of compound (III) can be increased to, for example, 95% or more, 97% or more, or 99% or more.
• the alcohol solvent used for repulp washing is cooled to, for example, 0 to 10 ° C. From the same viewpoint, it is preferable to use as little alcohol solvent as possible.
• the amount of solid matter is preferably about 50% to 200%.
• the repulp cleaning solution which is a filtrate for repulp cleaning, contains compound (III) as well as compound (V). Therefore, in the present embodiment, the above-mentioned compound (IV) can be obtained by hydrogenating and reducing the compound (III) and the compound (V) contained in the repulp washing solution to dehydrogenate.
• the hydrogenation reduction may be carried out by catalytically reducing the compound (III) and the compound (V) in a hydrogen atmosphere using a palladium-based catalyst such as palladium carbon. Compared with the elimination reduction of bromine, the elimination reduction of chlorine is significantly slower. Therefore, by carrying out the hydrogenation reduction of the present embodiment, dehydrogenation proceeds preferentially, and compound (IV) can be efficiently obtained.
• the repulp cleaning solution contains compound (III) and compound (V), when the cleaning solution is discarded, it causes an environmental load due to incineration and an increase in cost due to loss of raw materials.
• the environmental load can be reduced and the cost increase due to the loss of raw materials can be suppressed.
• the method for producing an azole derivative according to the present invention is the method for producing an azole derivative represented by the above general formula (I), which is 1-bromo-2-chloro-4- (4-chlorophenoxy).
• the step of reacting the derivative with imidazole or 1,2,4-triazole or an alkali metal salt thereof to obtain the above-mentioned azole derivative is included.
• 1-bromo-2-chloro-4- (4) is formed by reacting 1-chloro-3- (4-chlorophenoxy) benzene with bromine or a bromine compound.
• -Chlorophenoxy Includes further obtaining benzene.
• the bromine compound is a brominated imide.
• the obtained 1-bromo-2-chloro-4- (4-chlorophenoxy) benzene is purified by washing the repulp with an alcohol solvent. Including further.
• the bromohydrin derivative according to the present invention is the bromohydrin derivative represented by the above general formula (II).
• the method for producing a bromohydrin derivative according to the present invention is represented by an organometallic reagent produced from 1-bromo-2-chloro-4- (4-chlorophenoxy) benzene by a metal exchange reaction and CH 2 BrCOCOOR 1.
• the above bromopyruvic acid derivative is obtained by reacting with a bromopyruvic acid derivative.
• the method for producing 1-chloro-3- (4-chlorophenoxy) benzene according to the present invention is 1-bromo-2-chloro-4- (4-chlorophenoxy) benzene or 1-bromo-2-chloro-4-.
• 1-Chloro-3- (4-chlorophenoxy) benzene is obtained by hydrogenating and reducing a mixture of (4-chlorophenoxy) benzene and its positional isomer.
• Methyl 3-bromo-2- (2-chloro-4- (4-chlorophenoxy) phenyl) -2-hydroxypropanoate (0.130 g) obtained in the above synthesis was dissolved in DMF (0.9 ml) and dissolved in DMF (0.9 ml).
• Sodium triazole salt (0.057 g) was added, and the mixture was stirred in an oil bath (60 ° C.) for 3 hours. After stirring, the mixture was cooled to room temperature and the solvent was distilled off.
• Lithium chloride (4.499 g, vacuum dried at 130 ° C. for 6 hours) was weighed under a nitrogen stream, sealed in a 500 ml four-necked flask equipped with a dropping funnel and a thermometer, substituted with argon, and isopropylmagnesium chloride (isopropylmagnesium chloride (4.499 g, vacuum dried at 130 ° C.)).
• a solution of 106.12 mmol) in tetrahydrofuran was added dropwise. The solution was stirred at room temperature for 25 minutes and ice cooled to allow 1-bromo-2-chloro-4- (4-chlorophenoxy) benzene (25,000 g, GC purity 98.7%, o-isomer 0.
• the catalyst was removed by filtration through a high-flo supercell, the solvent was distilled off, and then the mixture was dissolved in toluene (20 ml). By washing with water (20 ml) and distilling off the solvent, 1-chloro-3- (4-chlorophenoxy) benzene (7.516 g, theoretical yield ratio 101.6%, GC purity 94.7%, 1- Bromo-2-chloro-4- (4-chlorophenoxy) benzene (1.7%) and 1-bromo-4-chloro-2- (4-chlorophenoxy) benzene (0.5%) were obtained.
• a 25 ml three-necked flask equipped with an exhaust trap using an Erlenmeyer flask containing an aqueous solution of sodium sulfite (3.0 g) and sodium hydrogen carbonate (2.0 g) and a dropping funnel was placed in a 25 ml three-necked flask containing a hydride of a concentrated oil of a repulp washing solution.
• Lithium chloride (0.720 g, vacuum dried at 130 ° C. for 6 hours) was weighed under a nitrogen stream, sealed in a 50 ml three-necked flask equipped with a dropping funnel and a thermometer, subjected to argon substitution, and a tetrahydrofuran solution of isopropylmagnesium chloride. (0.965 mol / L, 17.60 ml, 16.99 mmol) was added dropwise. The solution is stirred at room temperature for 25 minutes, ice-cooled and 1-bromo-2-chloro-4- (4-chlorophenoxy) benzene (4.01 g, GC purity: 94.2%, 1-bromo-4).
• the present invention can be used for the synthesis of azole derivatives useful as pesticides.

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• 2021
  • 2021-03-10 EP EP21767805.1A patent/EP4119534A4/en not_active Withdrawn
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