WO2017064550A1 - 3-氟代烷基-1-甲基吡唑-4-羧酸的制备方法 - Google Patents
3-氟代烷基-1-甲基吡唑-4-羧酸的制备方法 Download PDFInfo
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- WO2017064550A1 WO2017064550A1 PCT/IB2016/001462 IB2016001462W WO2017064550A1 WO 2017064550 A1 WO2017064550 A1 WO 2017064550A1 IB 2016001462 W IB2016001462 W IB 2016001462W WO 2017064550 A1 WO2017064550 A1 WO 2017064550A1
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- carboxylic acid
- methylpyrazole
- fluorodecyl
- methyl
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- BRJHIUPNDYVERF-UHFFFAOYSA-N CC(c1c[n](C)nc1C)=O Chemical compound CC(c1c[n](C)nc1C)=O BRJHIUPNDYVERF-UHFFFAOYSA-N 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D231/00—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings
- C07D231/02—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings
- C07D231/10—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
- C07D231/14—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three 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, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
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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
- A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
- A01N43/56—1,2-Diazoles; Hydrogenated 1,2-diazoles
-
- 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
- A01N45/00—Biocides, pest repellants or attractants, or plant growth regulators, containing compounds having three or more carbocyclic rings condensed among themselves, at least one ring not being a six-membered ring
- A01N45/02—Biocides, pest repellants or attractants, or plant growth regulators, containing compounds having three or more carbocyclic rings condensed among themselves, at least one ring not being a six-membered ring having three carbocyclic rings
Definitions
- the present invention relates to an industrial synthesis method of 3-fluorodecyl-1-methylpyrazole-4-carboxylic acid.
- 3-fluorodecyl-1-methylpyrazole-4-carboxylic acid is an important intermediate.
- 3-(Difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylic acid (CAS: 176969-34-9) is an important pesticide intermediate. It plays a very important intermediate role in many new pesticide varieties, such as: Bixafen, a cereal fungicide from Bayer CropScience, and a new fungicide, Huxapyroxad, introduced by BASF. Synaptic pyridostigmine (lsopyrazam), fluoxazole (Sedaxane) and so on.
- a method of Claisen condensation of ethyl difluoroacetate It is a method currently used in industrial mass production and is disclosed in the patent document W02009106619 of BASF. The process is as follows: starting from ethyl difluoroacetate, ethyl fluoroacetate is obtained by Claisen condensation reaction, and then condensed with triethyl orthoformate to obtain 4, 4-difluoro-2-(ethoxy methoxy Ethyl 3-oxobutanoate, which is formed by ring closure with methylhydrazine to give ethyl 3-(difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylate (DFMMP), Hydrolysis with sodium hydroxide, acidification with hydrochloric acid gave 3-(difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylic acid (DFPA).
- DFAMMP 4-difluoro-2-(ethoxy methoxy Ethyl 3-o
- ethyl difluoroacetate has different patent reports, some are from tetrafluoroethylene monomer, through tetrafluoroethylene intermediate, two steps to synthesize ethyl difluoroacetate. Further, ethyl chloroacetate is used as a raw material, and a chlorine atom is converted into a fluorine atom by potassium fluoride.
- the route adopts the classical synthetic methodology, which has the characteristics of high yield and stable production. The disadvantage is that the route is longer, and more exhaust gas, waste water and solid waste are generated.
- DFMMP -1H-pyrazole-4-carboxylic acid ethyl ester
- DFPA 3-(difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylic acid
- difluoroacetyl fluoride gas is obtained by pyrolysis of tetrafluoroethyl ether.
- the route is ingeniously designed with short steps and high yield.
- the synthesis cost of ethyl dimethylaminoacrylate is relatively high.
- difluorochloroacetyl chloride method It is disclosed in the patent document W02012025469 of Solvay Corporation (S0LVAY). The process is as follows: using difluorochloroacetyl chloride (CDFAC) as a starting material, reacting with ketene and quenching with ethanol to obtain ethyl difluorochloroacetoacetate, which is obtained by a method similar to Claisen condensation to obtain 3-( Ethyl difluorochloromethyl)-1-methyl-1H-pyrazole-4-carboxylate, zinc powder reduction or palladium hydrocarbonation to give 3-(difluoromethyl)-1-methyl-1H-pyrazole Ethyl 4-carboxylate (DFMMP), hydrolyzed with sodium hydroxide, acidified with hydrochloric acid to give 3-(difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylic acid (DFPA).
- CDFAC difluorochloroacetyl chloride
- the route has the characteristics of high yield, good atomic economy, low cost, low exhaust gas, waste water and solid waste.
- the disadvantage is that the route is long, the difluorochloroacetyl chloride is obtained by photooxidation, and the equipment investment is high, and To increase the reaction of reducing dechlorination in one step.
- the ethyl fluoroacetate is used as a raw material disclosed in the patent document W02009000442 to react with hydrazine hydrate to form a hydrazide, which is methylated and then closed with ethyl propiolate to obtain 3-(difluoromethyl)-1- Methyl-1H-pyrazole-4-carboxylic acid ethyl ester (DFMMP), the yield of the method is not high, and the ethyl propiolate is relatively expensive, and is not suitable for industrial production.
- DMFMP 3-(difluoromethyl)-1- Methyl-1H-pyrazole-4-carboxylic acid ethyl ester
- the technical problem to be solved by the present invention is to provide a 3-difluoromethyl-1-methylpyrazole-4- which is short in reaction route, low in raw material cost, high in reaction yield in each step, and suitable for industrial production.
- a process for the preparation of a carboxylic acid, and 3-fluorodecyl-1-methylpyrazole-4-carboxylic acid prepared by the process.
- the present invention provides a technical solution to solve the above technical problem that is: one 3-fluoro-1-methyl-pyrazol embankment _ 4 _ preparation of carboxylic acid, comprising the steps of: a step to formula I
- the fluoroacetyl halide derivative is condensed with dimethylamino vinyl methyl ketone to form 3-dimethylaminomethylene-1,1-difluoro-2,4-pentyl group represented by formula II.
- Diketone derivatives
- Ri is a hydrogen, fluorine or chlorine atom
- R 2 is a fluorine or chlorine atom
- Step 2 3-dimethylaminomethylene-1,1-difluoro-2 represented by the formula II, The 4-pentanedione derivative is reacted with a methylhydrazine ring to form a 3-fluorodecyl-1-methyl-4-acetylpyrazole derivative of the formula III.
- Step III The 3-fluorodecyl-1-methyl-4-acetylpyrazole derivative of the formula III is oxidized under alkali conditions and then acidified to form the formula IV. 3-fluorodecyl-1-methylpyrazole-4-carboxylic acid,
- a preferred embodiment of the above technical formula is as follows: In the above step 1, the fluoroacetyl halide derivative gas represented by the formula I is directly introduced into the dichloroformamidine solution of the dimethylamino vinyl methyl ketone. Medium, the reaction temperature is
- a preferred embodiment of the above technical solution is as follows: in the second step, the reaction temperature is -40 ° C to 0 ° C, the reaction time is 1 h 8 h, the methyl hydrazine and the 3-dimethyl group represented by the formula II
- the molar ratio of the aminomethylene-1,1-difluoro-2, 4-pentanedione derivative is 1. 1:1 ⁇ 1. 5:1.
- reaction temperature is from -25 ° C to -20 ° C
- reaction time is from lh to 2 h.
- the 3-dimethylaminomethylene-1,1-difluoro-2,4-pentanedione derivative represented by the formula II is Methyl hydrazine undergoes a ring closure reaction in the presence of dimethylamine.
- the dimethylamine is provided in the form of an aqueous solution.
- the molar ratio of the dimethylamine to the 3-dimethylaminomethylene-1,1-difluoro-2, 4-pentanedione derivative of the formula II may be 1. 5 : 1 ⁇ 2. 5: 1.
- the addition of dimethylamine can increase the yield of the reaction.
- a preferred embodiment of the above technical solution is as follows: In the above step 3, the sodium hypochlorite solution or the sodium hypobromite solution is used for the oxidation under alkaline conditions, and the sodium hypochlorite solution is passed through the sodium hydroxide solution. Prepared in an aqueous solution, the sodium hypobromite solution is prepared by passing liquid bromine into an aqueous solution of sodium hydroxide.
- reaction temperature is from 0 ° C to 50 ° C
- reaction time is from lh to 5 h.
- reaction temperature is from 10 ° C to 20 ° C
- reaction time is from 2 h to 3 h.
- a preferred embodiment of the above technical solution is as follows: In the above step 3, the acidification is carried out using a hydrochloric acid solution, and finally adjusted to a ra value of ⁇ ⁇ 2.
- the fluoroacetyl halide derivative represented by the above formula I is difluoroacetyl fluoride, and the 3-fluorodecyl-1-methylpyrazole-4- represented by the formula IV
- the carboxylic acid is 3-(difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylic acid.
- the invention has positive effects: the preparation method of the 3-fluorodecyl-1-methylpyrazole-4-carboxylic acid of the invention has short reaction route, low raw material cost, safety and reliability, high reaction yield in each step, and atom High economy and high product quality.
- the method is simple and convenient to operate, and has low emission of waste gas, waste water and solid waste, and is suitable for industrial production, and the dimethylamino vinyl methyl ketone used in the reaction is convenient to prepare.
- Figure 1 is a reaction flow diagram for the preparation of 3-(difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylic acid according to Example 1 of the present invention
- Figure 2 is a gas chromatogram of 3-difluoromethyl-1-methyl-4-acetylpyrazole synthesized in Example 1 of the present invention
- Figure 3 is a liquid chromatogram of 3-difluoromethyl-1-methyl-4-acetylpyrazole synthesized in Example 1 of the present invention
- Figure 4 is a nuclear magnetic resonance hydrogen spectrum of 3-difluoromethyl-1-methyl-4-acetylpyrazole synthesized in Example 1 of the present invention
- Figure 5 is a liquid chromatogram of 3-(difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylic acid synthesized in Example 1 of the present invention
- Figure 6 is a nuclear magnetic resonance spectrum of 3-(difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylic acid synthesized in Example 1 of the present invention. Specific real Ifc ⁇
- the preparation method of 3-(difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylic acid of the present embodiment comprises the following steps:
- reaction liquid is concentrated under reduced pressure on a rotary evaporator to remove the solvent, and the residue is a crude product of 3-dimethylaminomethylene-1,1-difluoro-2, 4-pentanedione, and the gas phase purity is more than 95%. , used directly in the next step according to the quantitative yield.
- the difluoroacetyl fluoride gas used is pyrolyzed by tetrafluoroethyl ether at a reaction temperature of 300 ° C, and an aluminum phosphate inorganic salt is used as a catalyst in the reaction.
- the dimethylamino vinyl methyl ketone used is obtained by subjecting acetone, ethyl formate and sodium methoxide to a condensation reaction and then treating with dimethylamine hydrochloride.
- the reaction formula is as follows:
- the dimethylamino vinyl methyl ketone has a simple preparation method and low cost, and has a positive effect on the cost control of the preparation method of the present invention.
- the reaction solution was cooled to 10 °C.
- 100 g of 3-difluoromethyl-1-methyl-4-acetylpyrazole was dissolved in 100 ml of methanol to prepare an organic solution.
- the organic solution was then slowly added dropwise to the flask.
- the reaction temperature was maintained at 10 ° C to 15 ° C during the dropwise addition. After the addition was completed, the incubation was continued for 3 hours.
- the reaction of the starting material was completely detected by TLC thin layer chromatography. Then, the aqueous layer was extracted with dichloromethane, and the organic layer was used as a waste liquid to recover methylene chloride.
- the extracted aqueous layer was added with a concentration of 31% hydrochloric acid to adjust the ra value to 1 to 2, and then cooled to about 10 ° C, and kept for 0.5 h, suction filtration, and dried to obtain 95 g of the final product, yield 95%.
- the final product was analyzed by nuclear magnetic resonance spectroscopy using a Bruker 400M NMR spectrometer.
- the solvent was DMS0_d6, and the results of nuclear magnetic resonance spectroscopy were analyzed. as follows:
- the preparation method of 3-(difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylic acid of the present embodiment comprises the following steps:
- reaction liquid is concentrated under reduced pressure on a rotary evaporator to remove the solvent, and the residue is a crude product of 3-dimethylaminomethylene-1,1-difluoro-2, 4-pentanedione, and the gas phase purity is more than 95%. , used directly in the next step according to the quantitative yield.
- a 40% strength aqueous solution of methylhydrazine was added to a three-neck round bottom flask, and the methyl hydrazine in the solution was 126 g (1.1 lmol).
- the temperature was lowered to -20 ° C, and then the prepared solution of 3-dimethylaminomethylene-1,1-difluoro-2, 4-pentanedione in dichloromethane was added dropwise to the flask, and the temperature was controlled. Add dropwise at -25 ° C to - 20 ° C, and keep warm for 1 h after the addition.
- the reaction of the starting material was completely determined by gas chromatography, and the mixture was allowed to warm to room temperature, and then the aqueous layer was separated, and the dried organic layer was concentrated, and then recrystallized to give a white solid product of 150 g, yield 86%.
- the aqueous layer was extracted with dichloromethane, and the organic layer was used as a waste liquid to recover methylene chloride.
- the extracted aqueous layer was added with a concentration of 31% hydrochloric acid to adjust the ra value to 1 to 2, and then cooled to about 10 ° C, and kept at 0. 5 h, suction filtration, and dried to obtain 95 g of the final product, yield 95%.
- the preparation method of 3-(difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylic acid of the present embodiment comprises the following steps:
- reaction liquid is concentrated under reduced pressure on a rotary evaporator to remove the solvent, and the residue is a crude product of 3-dimethylaminomethylene-1,1-difluoro-2, 4-pentanedione, and the gas phase purity is more than 95%. , used directly in the next step according to the quantitative yield.
- the aqueous layer was extracted with dichloromethane, and the organic layer was used as a waste liquid to recover methylene chloride.
- the extracted aqueous layer was added with a concentration of 31% hydrochloric acid to adjust the ra value to 1 to 2, and then cooled to about 10 ° C, and kept for 0.5 h, suction filtration, and dried to obtain a final product of 84 g, yield 96%.
- the preparation method of 3-(trifluoromethyl)-1-methyl-1H-pyrazole-4-carboxylic acid (CAS: 113100-53-1) of the present embodiment comprises the following steps: Synthesis of 3-dimethylaminomethylene-1, 1, 1-trifluoro-2, 4-pentanedione.
- reaction liquid is concentrated under reduced pressure on a rotary evaporator to remove the solvent, and the residue is a crude product of 3-dimethylaminomethylene-1,1,1-trifluoro-2, 4-pentanedione, the gas phase purity is greater than 95%, used directly in the next step according to the quantitative yield.
- a 40% aqueous solution of methylhydrazine was added to a three-neck round bottom flask, and the methyl hydrazine in the solution was 63 g (0.55 mol).
- the temperature was lowered to -20 ° C, and then the above-prepared solution of 3-dimethylaminomethylene-1,1,1-trifluoro-2,4-pentanedione in methylene chloride was added dropwise to the flask at a temperature.
- the control is carried out at -25 ° C to - 20 ° C for dropwise addition, and after the completion of the dropwise addition, the temperature is kept for 1 hour.
- the gas is detected by gas chromatography, the reaction is completed, the temperature is raised to room temperature, the aqueous layer is separated, the dried organic layer is concentrated, and then recrystallized to give 3-trifluoromethyl-1-methyl-4-acetylpyrazole 86. 4 g. The rate is 90%.
- the aqueous layer was extracted with dichloromethane, and the organic layer was used as a waste liquid to recover methylene chloride.
- the extracted aqueous layer was added with a concentration of 31% hydrochloric acid to adjust the ra value to 1 to 2, and then cooled to about 10 ° C, and kept for 0.5 h, suction filtration, and dried to obtain 92 g of the final product, yield 95%.
- the preparation method of 3-(difluorochloromethyl)-1-methyl-1H-pyrazole-4-carboxylic acid of this embodiment comprises the following steps:
- reaction liquid was concentrated under reduced pressure on a rotary evaporator to remove the solvent, and the residue was a crude product of 3-dimethylaminomethylene-1,1,1-trifluoro-2, 4-pentanedione.
- the purity is greater than 95% and is directly used in the next reaction according to the quantitative yield.
- a 40% strength aqueous solution of methylhydrazine was added to a three-neck round bottom flask, and the methyl hydrazine in the solution was 126 g (1.1 lmol).
- the temperature was lowered to -20 ° C, and then the above-prepared solution of 3-dimethylaminomethylene-1-chloro-1,1-difluoro-2,4-pentanedione in dichloromethane was added dropwise to the flask.
- the temperature is controlled to drop at _25 ° C ⁇ - 20 ° C, and the temperature is maintained for 1 h after the addition.
- Gas chromatography was used to detect the reaction of the starting material, and the temperature was raised to room temperature.
- the aqueous layer was separated, and the dried organic layer was concentrated and dried to give 3-difluorochloromethyl-1-methyl-4-acetylpyrazole 181 ⁇ 2. 88%.
- Examples 6 and 7 describe the conversion of 3-fluorodecyl-1-methylpyrazole-4-carboxylic acid via its carboxylic acid halide to a pesticide, preferably an amide fungicide, such as the textbook “Bioactive Miscellaneous” Bioactive Heterocyclic Compound Classes, Editors C. Lamberth and J. 1973, Wi ley 2012, p. 175- 193, Chapter 15, Pyrazolecarboxamide bactericides inhibit dehydrogenation of succinate per (Chapter 15, Pyrazole Carboxamide Fungicides Inhibiting Succinate Dehydrogenase) and "Modern Crop Protection Compounds", eds. W. Kramer, U. Schirmer, P. Jeschke, and M.
- a pesticide preferably an amide fungicide
- Example 6 3-(Difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylic acid in Example 2 was reacted with oxalyl chloride (1.25 equivalent) in toluene, and a few drops of dimethyl were added. Carboxamide. The mixture was concentrated under reduced pressure to give carbonyl chloride.
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Abstract
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Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018535265A JP2018531285A (ja) | 2015-09-28 | 2016-09-28 | 3−フルオロアルキル−1−メチルピラゾール−4−カルボン酸の合成方法 |
| KR1020187010626A KR20180059471A (ko) | 2015-09-28 | 2016-09-28 | 3-플루오로알킬-1-메틸피라졸-4-카르복실산의 제조 방법 |
| DE112016000140.1T DE112016000140B4 (de) | 2015-09-28 | 2016-09-28 | Verfahren zur Herstellung von 3-Fluoralkyl-1-methylpyrazol-4-carbonsäure |
| CH00617/17A CH711995B1 (de) | 2015-09-28 | 2016-09-28 | Verfahren zur Herstellung von 3-Fluoralkyl-1-methylpyrazol-4-Carbonsäure und eines Pestizids. |
| EP16794724.1A EP3357913A1 (en) | 2015-09-28 | 2016-09-28 | Preparation method for 3-fluoroalkyl-1-methylpyrazole-4-carboxylic acid |
| US15/763,472 US10457645B2 (en) | 2015-09-28 | 2016-09-28 | Method for the preparation of 3-fluoroalkyl-1-methylpyrazol-4-carboxylic acid |
| CN201680056250.4A CN108368055B (zh) | 2015-09-28 | 2016-09-28 | 3-氟代烷基-1-甲基吡唑-4-羧酸的制备方法 |
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| PCT/CN2015/090970 WO2017054112A1 (zh) | 2015-09-28 | 2015-09-28 | 3-氟代烷基-1-甲基吡唑-4-羧酸的制备方法 |
| CNPCT/CN2015/090970 | 2015-09-28 |
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| WO2017064550A1 true WO2017064550A1 (zh) | 2017-04-20 |
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| PCT/IB2016/001462 Ceased WO2017064550A1 (zh) | 2015-09-28 | 2016-09-28 | 3-氟代烷基-1-甲基吡唑-4-羧酸的制备方法 |
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| PCT/CN2015/090970 Ceased WO2017054112A1 (zh) | 2015-09-28 | 2015-09-28 | 3-氟代烷基-1-甲基吡唑-4-羧酸的制备方法 |
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| US (1) | US10457645B2 (zh) |
| EP (1) | EP3357913A1 (zh) |
| JP (1) | JP2018531285A (zh) |
| KR (1) | KR20180059471A (zh) |
| CN (1) | CN108368055B (zh) |
| CH (1) | CH711995B1 (zh) |
| DE (1) | DE112016000140B4 (zh) |
| FR (1) | FR3041637B1 (zh) |
| IT (1) | IT201600097392A1 (zh) |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019043238A1 (en) | 2017-09-04 | 2019-03-07 | Solvay Sa | PROCESS AND INTERMEDIARY FOR MANUFACTURING DIFLUOROACETYL CHLORIDE |
| US10239841B2 (en) | 2015-03-26 | 2019-03-26 | AGC Inc. | Method for producing pyrazole derivative |
| EP3495351A1 (en) | 2017-12-08 | 2019-06-12 | Solvay Sa | Oxidation of a pyrazolyl ketone compound to the corresponding carboxylic acid |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018201272A1 (en) | 2017-05-02 | 2018-11-08 | Solvay Fluor Gmbh | Process for the manufacture of carboxylic acids or carboxylic acid derivatives |
| CN113912541A (zh) * | 2021-10-29 | 2022-01-11 | 南通宝凯药业有限公司 | 一种3-二氟甲基-1-甲基-1h-吡唑-4-羧酸的制备方法 |
| CN114790173B (zh) * | 2022-04-29 | 2023-08-01 | 浙江南郊化学有限公司 | 1-甲基-3-二氟甲基吡唑-4-甲酸绿色合成工艺 |
| CN116947638B (zh) * | 2023-07-24 | 2025-10-10 | 淄博飞源化工有限公司 | 一锅法制备西格列汀中间体的方法 |
| CN117603070A (zh) * | 2023-11-10 | 2024-02-27 | 安徽泓泽新材料科技有限公司 | 一种2-二氟乙酰基-3-二甲胺基丙烯酸乙酯化合物及其制备方法和应用 |
| CN117603069A (zh) * | 2023-11-10 | 2024-02-27 | 安徽泓泽新材料科技有限公司 | 一种2-二氟乙酰基-3-二甲胺基丙烯酸乙酯化合物及其制备方法和应用 |
| CN117447401B (zh) * | 2023-12-26 | 2024-04-19 | 山东国邦药业有限公司 | 一种二氟吡唑酸的合成方法 |
| CN120682149A (zh) * | 2025-07-04 | 2025-09-23 | 蓝启生科(浙江)新材料有限公司 | 一种1-甲基-3-二氟甲基-4-吡唑酸酯的合成方法 |
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| WO2011113788A1 (en) * | 2010-03-15 | 2011-09-22 | Syngenta Participations Ag | Process for purifying 3-difluoromethyl-1-methyl-1h-pyrazole-4-carboxylic acid |
| WO2016152886A1 (ja) * | 2015-03-26 | 2016-09-29 | 旭硝子株式会社 | ピラゾール誘導体の製造方法 |
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- 2016-09-28 IT IT102016000097392A patent/IT201600097392A1/it unknown
- 2016-09-28 CH CH00617/17A patent/CH711995B1/de not_active IP Right Cessation
- 2016-09-28 DE DE112016000140.1T patent/DE112016000140B4/de not_active Expired - Fee Related
- 2016-09-28 FR FR1659165A patent/FR3041637B1/fr not_active Expired - Fee Related
- 2016-09-28 KR KR1020187010626A patent/KR20180059471A/ko not_active Withdrawn
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10239841B2 (en) | 2015-03-26 | 2019-03-26 | AGC Inc. | Method for producing pyrazole derivative |
| WO2019043238A1 (en) | 2017-09-04 | 2019-03-07 | Solvay Sa | PROCESS AND INTERMEDIARY FOR MANUFACTURING DIFLUOROACETYL CHLORIDE |
| EP3495351A1 (en) | 2017-12-08 | 2019-06-12 | Solvay Sa | Oxidation of a pyrazolyl ketone compound to the corresponding carboxylic acid |
| WO2019110795A1 (en) | 2017-12-08 | 2019-06-13 | Solvay Sa | Oxidation of a pyrazolyl ketone compound to the corresponding carboxylic acid |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3357913A1 (en) | 2018-08-08 |
| CN108368055A (zh) | 2018-08-03 |
| CN108368055B (zh) | 2021-04-16 |
| FR3041637B1 (fr) | 2019-04-05 |
| US20180273486A1 (en) | 2018-09-27 |
| US10457645B2 (en) | 2019-10-29 |
| IT201600097392A1 (it) | 2018-03-28 |
| FR3041637A1 (fr) | 2017-03-31 |
| DE112016000140T5 (de) | 2017-07-27 |
| CH711995B1 (de) | 2018-01-15 |
| DE112016000140B4 (de) | 2021-01-21 |
| KR20180059471A (ko) | 2018-06-04 |
| JP2018531285A (ja) | 2018-10-25 |
| WO2017054112A1 (zh) | 2017-04-06 |
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