WO2009157525A1 - 3-メチル-2-チオフェンカルボン酸の製造方法 - Google Patents
3-メチル-2-チオフェンカルボン酸の製造方法 Download PDFInfo
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- WO2009157525A1 WO2009157525A1 PCT/JP2009/061661 JP2009061661W WO2009157525A1 WO 2009157525 A1 WO2009157525 A1 WO 2009157525A1 JP 2009061661 W JP2009061661 W JP 2009061661W WO 2009157525 A1 WO2009157525 A1 WO 2009157525A1
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- thiophenecarboxylic acid
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- 0 Cc1c(*)[s]cc1 Chemical compound Cc1c(*)[s]cc1 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D333/00—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom
- C07D333/02—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings
- C07D333/04—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom
- C07D333/26—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur 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
- C07D333/38—Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
- C07D333/40—Thiophene-2-carboxylic acid
Definitions
- the present invention relates to a method for producing 3-methyl-2-thiophenecarboxylic acid, which is useful as an intermediate for producing pharmaceuticals and agricultural chemicals.
- Patent Document 1 describes a method for producing 3-methyl-2-thiophenecarboxylic acid by reacting 3,4-dihalobutan-2-one with thioglycolic acids in the presence of a base.
- this method has problems in industrial implementation such as the use of odorous thioglycolic acid.
- Non-Patent Document 1 discloses that after preparing a Grignard reagent of 2-bromo-3-methylthiophene obtained by brominating 3-methylthiophene, it is reacted with carbon dioxide to give 3-methyl-2-thiophenecarboxylic acid. Is described. However, this method does not provide a sufficient production yield of 3-methyl-2-thiophenecarboxylic acid.
- 3-Methyl-2-thiophenecarboxylic acid is useful as an intermediate for the production of medicines and agrochemicals, and it has been demanded to produce it more simply and efficiently and more economically in an environmentally friendly manner.
- a production route in which a compound of the following formula (I) is used as a Grignard reagent of the following formula (II) and subsequently reacted with carbon dioxide to obtain 3-methyl-2-thiophenecarboxylic acid has utility value for an industrial production method. Although high, under normal reaction conditions, conversion to the corresponding Grignard reagent is not satisfactory even when relatively highly reactive 2-bromo-3-methylthiophene is used as a starting material. In addition, 3-methyl-2-thiophenecarboxylic acid cannot be obtained in high yield.
- An object of the present invention is to provide a method for producing 3-methyl-2-thiophenecarboxylic acid in a high yield by an environmentally friendly method in a simple and efficient manner.
- 3-methyl-2-thiophenecarboxylic acid which is useful as an intermediate for the production of medical and agrochemicals, can be produced more economically in a simple, efficient and environmentally friendly manner.
- reaction flow (process) will be described in detail for the method for producing 3-methyl-2-thiophenecarboxylic acid according to the present invention.
- the first step is a reaction in which a compound of formula (I) and magnesium are reacted in the presence of an alkyl halide to prepare a Grignard reagent of formula (II), by reacting the alkyl halide with magnesium.
- This is a reaction in which the reactivity is improved by activating magnesium and the desired Grignard reagent is efficiently produced.
- the addition order of the compound of formula (I), magnesium and alkyl halide in this reaction is batch addition, any addition order, for example, magnesium and alkyl halide are reacted in advance, and then halogenated there.
- Alkyl halide (which may be the same or different from the one added earlier) and the compound of formula (I) are added simultaneously or separately, or the alkyl halide is gradually added dropwise to the mixture of the compound of formula (I) and magnesium. It may be a method to do so.
- Examples of the halogenated alkyl used in the first step include alkyl having 1 to 6 carbon atoms substituted with a chlorine atom, a bromine atom or an iodine atom. Specific examples include methyl iodide, ethyl bromide, isopropyl bromide, ethylene dibromide, isopropyl chloride and the like. Among these, methyl iodide, ethyl bromide or isopropyl bromide is preferable, and ethyl bromide is more preferable. In addition, alkyl halides may be used alone or in combination of two or more appropriately selected.
- the Grignard reagent of the formula (II) obtained in the first step is reacted with carbon dioxide, and the reaction product is acidified to produce 3-methyl-2-thiophenecarboxylic acid.
- the acidification treatment referred to in the present invention means that the system is acidified by adding an acid or an acidic aqueous solution.
- 3-methyl-2-thiophenecarboxylic acid can be purified by a conventional method if necessary. For example, it can be purified by forming an alkali metal salt or an alkaline earth metal salt.
- the production method of the present invention is a method for producing 3-methyl-2-thiophenecarboxylic acid by the first step and the second step.
- the compound of formula (I) and magnesium are converted to an alkyl halide. After reacting in the presence and then with carbon dioxide, the procedure of acidifying the reactant can be carried out continuously.
- the production method of the present invention can be carried out usually in the presence of a solvent through the first step and the second step.
- the solvent is not particularly limited as long as it does not adversely influence the reaction.
- ethers such as diethyl ether, tetrahydrofuran, tetrahydropyran, 1,4-dioxane, cyclopentylmethyl ether, diethoxyethane, methyl t-butyl ether
- Aromatic hydrocarbons such as benzene, toluene and xylene; saturated hydrocarbons such as normal paraffin, isoparaffin and naphthene;
- the solvent one or more of these can be appropriately selected.
- ethers are preferable, and tetrahydrofuran or tetrahydropyran is more preferable.
- the amount of the solvent to be used cannot be generally specified due to differences in raw materials, solvent types, and reaction conditions. ⁇ 10 parts by weight.
- the first step and the second step are preferably performed in an inert gas atmosphere such as nitrogen, helium, or argon because the yield decreases when contacted with water.
- an inert gas atmosphere such as nitrogen, helium, or argon because the yield decreases when contacted with water.
- the amount of each of the compound of formula (I), magnesium, alkyl halide, and carbon dioxide cannot be specified unconditionally due to differences in raw materials, solvent types, reaction conditions, etc.
- the ratio is as follows with respect to 1 mol. That is, magnesium has a ratio of 1.0 to 3.0 mol, preferably 1.0 to 1.50 mol, alkyl halide is 0.01 to 0.3 mol, preferably 0.05 to 0.2 mol, and carbon dioxide is 1.0 to 3.0 mol.
- the ratio is preferably 1.0 to 2.0 mol.
- reaction temperature and reaction time in the present invention vary depending on the type, use form, order of addition, amount of use, etc. of the compound represented by formula (I), magnesium, alkyl halide, carbon dioxide, and solvent. Cannot be specified.
- the reaction temperature in the first step is usually 0 to 150 ° C., preferably 0 to 100 ° C., and the reaction time is 0.1 to 24 hours, preferably 1 to 10 hours.
- the reaction temperature in the second step is usually 0 to 150 ° C., preferably 0 to 100 ° C., and the reaction time is 0.1 to 24 hours, preferably 0.5 to 10 hours.
- the compound of the formula (I) can be produced by the following method.
- 2-chloro-3-methylthiophene As the compound of the formula (I), it is economical to use 2-chloro-3-methylthiophene as the compound of the formula (I), and the utility value as an industrial production method becomes higher.
- 2-Chloro-3-methylthiophene can be produced by various methods, and can be produced by reacting 3-methylthiophene with a chlorinating agent.
- the reaction for producing 2-chloro-3-methylthiophene by reacting 3-methylthiophene with a chlorinating agent is conducted in the absence of a solvent or in the presence of a solvent at a reaction temperature of 0 to 150 ° C. and a reaction time of 0.1 to 24 hours. It can be carried out.
- chlorinating agent used in the reaction for producing 2-chloro-3-methylthiophene include N-chlorosuccinimide (NCS), sulfuryl chloride, chlorine and the like. Of these, sulfuryl chloride or chlorine is preferred industrially.
- the amount of chlorinating agent used cannot be specified unconditionally due to differences in raw materials, solvent types, reaction conditions, etc. 1.0 to 5.0 equivalents, preferably 1.0 to 1.5 equivalents.
- the solvent used when the reaction for producing 2-chloro-3-methylthiophene is carried out in the presence of a solvent is not particularly limited as long as it does not adversely influence the reaction.
- a solvent for example, alcohols such as methanol and ethanol; acids such as acetic acid; nitriles such as acetonitrile; amides such as N, N-dimethylformamide and N, N-dimethylacetamide; methylene chloride, chloroform, 1, Halogenated hydrocarbons such as 2-dichloroethane and 1,1,2-trichloroethane; aromatic hydrocarbons such as benzene, toluene, xylene, nitrobenzene and chlorobenzene; saturated hydrocarbons such as normal paraffin, isoparaffin and naphthene Esters such as methyl acetate, ethyl acetate and propyl acetate; ethers such as diethyl ether, 1,4-dioxane,
- the solvent one or more of these can be appropriately selected. Further, this reaction can be carried out in an inert gas atmosphere such as nitrogen, helium, or argon as necessary.
- the amount of the solvent used cannot be specified unconditionally due to differences in raw materials, solvent types, reaction conditions, etc., but usually 3-methylthiophene 1
- the amount is 1 to 30 parts by weight, preferably 1 to 10 parts by weight, based on parts by weight.
- a compound of formula (I) is reacted with magnesium in the presence of an alkyl halide to prepare a Grignard reagent of formula (II), which is reacted with carbon dioxide, and then the reaction product is acidified. To produce 3-methyl-2-thiophenecarboxylic acid.
- the chlorinating agent is sulfuryl chloride or chlorine.
- the method according to any one of (1) to (4) above, wherein the alkyl halide is methyl iodide, ethyl bromide or isopropyl bromide.
- Example 1 In a four-necked flask equipped with a stirrer, thermometer, condenser, and dropping funnel, 11.8 g of magnesium and 250 mL of tetrahydrofuran were charged in a nitrogen atmosphere, then 2.05 g of ethyl bromide was added, and the mixture was heated under reflux. Reacted for 1 minute. Thereafter, a mixed liquid of 50 g of 2-chloro-3-methylthiophene and 4.1 g of ethyl bromide was dropped while maintaining the reflux state, and the mixture was reacted for 30 minutes while heating under reflux. Thereafter, 4.11 g of ethyl bromide was added, and the mixture was further reacted for 1 hour under heating and reflux.
- Carbon dioxide was introduced into the obtained reaction solution at 25 to 35 ° C. and reacted at room temperature for 2 hours. After water was added to the obtained reaction solution, concentrated hydrochloric acid was added to adjust the reaction solution to pH 2 or lower. Thereafter, the aqueous layer was separated and water was added to the obtained organic layer, and then the solvent was distilled off to obtain a slurry of 3-methyl-2-thiophenecarboxylic acid. The obtained slurry was filtered and dried to obtain 50.5 g of 3-methyl-2-thiophenecarboxylic acid.
- Example 2 A four-necked flask equipped with a stirrer, thermometer, condenser, and dropping funnel was charged with 1.65 g of magnesium and 50 mL of tetrahydrofuran under a nitrogen atmosphere, and then 0.69 g of isopropyl bromide was added and heated for 30 minutes under reflux. Reacted. Thereafter, 10 g of 2-bromo-3-methylthiophene was added dropwise while maintaining the reflux state, and the mixture was allowed to react for 30 minutes with heating under reflux. Carbon dioxide was introduced into the obtained reaction solution at 25 to 35 ° C. and reacted at room temperature for 2 hours. After water was added to the obtained reaction solution, concentrated hydrochloric acid was added to adjust the reaction solution to pH 2 or lower.
- the production method of the present invention can produce 3-methyl-2-thiophenecarboxylic acid, which is useful as an intermediate for the production of medical and agricultural chemicals, in a simple and efficient manner, in an environmentally friendly manner, and at a lower cost. Industrially useful. It should be noted that the entire contents of the specification, claims, and abstract of Japanese Patent Application No. 2008-167970 filed on June 26, 2008 are incorporated herein as the disclosure of the specification of the present invention. Is.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Heterocyclic Compounds Containing Sulfur Atoms (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
また、非特許文献1には、3-メチルチオフェンを臭素化して得た2-ブロモ-3-メチルチオフェンのグリニャール試薬を調製した後、二酸化炭素と反応させて3-メチル-2-チオフェンカルボン酸を製造する方法が記載されている。しかしながら、この方法は、3-メチル-2-チオフェンカルボン酸の製造収率が十分なものではない。
本発明の目的は、簡便かつ効率的に、環境に配慮した手法により、高収率で3-メチル-2-チオフェンカルボン酸を製造する方法を提供することにある。
即ち、本発明は、式(I):
第1工程は、式(I)の化合物とマグネシウムとをハロゲン化アルキルの存在下で反応させて式(II)のグリニャール試薬を調製する反応であり、ハロゲン化アルキルとマグネシウムとを反応させることによりマグネシウムを活性化して反応性を向上させ、所望のグリニャール試薬を効率的に生成させる反応である。この反応における式(I)の化合物、マグネシウム及びハロゲン化アルキルの添加順序は、一括添加であっても、任意の添加順序、例えばマグネシウムとハロゲン化アルキルとを予め反応させておき、そこへハロゲン化アルキル(先に添加したものと同種でも異種でもよい)と式(I)の化合物とを同時に又は別々に添加する方法や、式(I)の化合物とマグネシウムの混合物にハロゲン化アルキルを徐々に滴下する方法などであってもよい。
本発明でいう酸性化処理とは、酸又は酸性水溶液等の添加によって系内を酸性にすることを意味する。
反応終了後、3-メチル-2-チオフェンカルボン酸は必要に応じて常法により精製を施すこともできる。例えば、アルカリ金属塩又はアルカリ土類金属塩を形成させることにより精製することができる。
しかし、第1工程における反応温度は、通常、0~150℃、好ましくは0~100℃であり、反応時間は0.1~24時間、好ましくは1~10時間である。
また、第2工程における反応温度は通常、0~150℃、好ましくは0~100℃であり、反応時間は0.1~24時間、好ましくは0.5~10時間である。
式(I)の化合物は、以下の方法により製造することができる。
2-クロロ-3-メチルチオフェンは、種々の方法で製造できるが、3-メチルチオフェンと塩素化剤を反応させて製造することができる。
3-メチルチオフェンと塩素化剤を反応させ、2-クロロ-3-メチルチオフェンを製造する反応は、無溶媒下又は溶媒存在下、0~150℃の反応温度、0.1~24時間の反応時間で行うことができる。
2-クロロ-3-メチルチオフェンを製造する反応において、塩素化剤の使用量は、原料、溶媒の種類、反応条件等の相違により一概に規定できないが、通常、3-メチルチオフェン1当量に対して、1.0~5.0当量、好ましくは1.0~1.5当量である。
2-クロロ-3-メチルチオフェンの製造反応を溶媒存在下で行う場合、溶媒の使用量は、原料、溶媒の種類、反応条件等の相違により一概に規定できないが、通常、3-メチルチオフェン1重量部に対して、1~30重量部、好ましくは1~10重量部である。
(1)ハロゲン化アルキルの存在下、式(I)の化合物をマグネシウムと反応させて式(II)のグリニャール試薬を調製し、このものを二酸化炭素と反応させた後、反応物を酸性化処理して3-メチル-2-チオフェンカルボン酸を製造する方法。
(2)式(I)の化合物が2-クロロ-3-メチルチオフェンである前記(1)の方法。
(3)2-クロロ-3-メチルチオフェンが3-メチルチオフェンと塩素化剤を反応させて得たものであることを特徴とする前記(2)の方法。
(4)塩素化剤が塩化スルフリル又は塩素である前記(3)の方法。
(5)ハロゲン化アルキルがヨウ化メチル、臭化エチル又は臭化イソプロピルである前記(1)~(4)のいずれかの方法。
攪拌器、温度計、冷却管、及び滴下漏斗を備えた四ツ口フラスコに、窒素雰囲気下マグネシウム 11.8 gとテトラヒドロフラン 250 mLとを仕込んだ後に、臭化エチル 2.05 g を投入し、加熱還流下15分間反応させた。その後、還流状態を保持しながら2-クロロ-3-メチルチオフェン 50 gと臭化エチル 4.1 gとの混合液を滴下し、加熱還流下30分間反応させた。その後、臭化エチル 4.11 gを投入し、加熱還流下さらに1時間反応させた。
得られた反応液に25~35℃で二酸化炭素を導入し、室温で2時間反応させた。得られた反応液に水を投入後、濃塩酸を加え、反応液をpH2以下に調整した。その後、水層を分液除去し、得られた有機層に水を加えた後、溶媒を留去して、3-メチル-2-チオフェンカルボン酸のスラリーを得た。得られたスラリーをろ過、乾燥し、3-メチル-2-チオフェンカルボン酸 50.5 gを得た。
攪拌器、温度計、冷却管、及び滴下漏斗を備えた四ツ口フラスコに、窒素雰囲気下マグネシウム 1.65 gとテトラヒドロフラン 50 mLとを仕込んだ後に、臭化イソプロピル 0.69 g を投入し加熱還流下30分間反応させた。その後、還流状態を保持しながら2-ブロモ-3-メチルチオフェン 10 gを滴下し、加熱還流下30分間反応させた。
得られた反応液に25~35℃で二酸化炭素を導入し、室温で2時間反応させた。得られた反応液に水を投入後、濃塩酸を加え、反応液をpH2以下に調整した。その後、酢酸エチルにて抽出し、水層を分液除去した。有機層を硫酸マグネシウムで乾燥した後、溶媒を留去し、3-メチル-2-チオフェンカルボン酸 7.95 gを得た。
2-クロロ-3-メチルチオフェンの合成
攪拌器、温度計、冷却管、及び滴下漏斗を備えた四ツ口フラスコに、3-メチルチオフェン 20 gを仕込み、15℃以下で塩化スルフリル 28.6 g を滴下し、15℃以下で1時間反応させた。
得られた反応液に、酢酸エチルを加えて希釈した後、水洗し、次いで水酸化ナトリウム水溶液(10質量%水溶液)にて洗浄して、2-クロロ-3-メチルチオフェンの酢酸エチル溶液を得た。得られた溶液を減圧蒸留し、沸点84-86℃/ 120-133 hPaの2-クロロ-3-メチルチオフェン 24.7 gを得た。
なお、2008年6月26日に出願された日本特許出願2008-167970号の明細書、特許請求の範囲、及び要約書の全内容をここに引用し、本発明の明細書の開示として、取り入れるものである。
Claims (6)
- 前記式(I)で表される化合物が、式(I)中のXが塩素原子である化合物である請求項1に記載の方法。
- 前記ハロゲン化アルキルが、ヨウ化メチル、臭化エチル又は臭化イソプロピルである請求項1又は2に記載の方法。
- 前記式(I) で表される化合物が、3-メチルチオフェンとハロゲン化剤とを反応させて得たものである請求項1~3のいずれかに記載の方法。
- 前記ハロゲン化剤が塩素化剤である請求項4に記載の方法。
- 前記塩素化剤が塩化スルフリル又は塩素である請求項5に記載の方法。
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/000,937 US8350057B2 (en) | 2008-06-26 | 2009-06-25 | Method for producing 3-methyl-2-thiophenecarboxylic acid |
| DK09770235.1T DK2298756T3 (en) | 2008-06-26 | 2009-06-25 | Process for the preparation of 3-methyl-2-thiophenecarboxylic acid |
| CN200980124306.5A CN102076677B (zh) | 2008-06-26 | 2009-06-25 | 3-甲基-2-噻吩甲酸的制造方法 |
| EP09770235.1A EP2298756B1 (en) | 2008-06-26 | 2009-06-25 | Method for producing 3-methyl-2-thiophenecarboxylic acid |
| AU2009263303A AU2009263303B2 (en) | 2008-06-26 | 2009-06-25 | Method for producing 3-methyl-2-thiophenecarboxylic acid |
| BRPI0913890-0A BRPI0913890A2 (pt) | 2008-06-26 | 2009-06-25 | Método para produção de ácido 3-metil-2tiofenocarboxílico |
| IL210278A IL210278A0 (en) | 2008-06-26 | 2010-12-26 | Method for producing 3 - methyl - 2 - thiophenecarboxylic acid |
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| Application Number | Priority Date | Filing Date | Title |
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| JP2008-167970 | 2008-06-26 | ||
| JP2008167970 | 2008-06-26 |
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| WO2009157525A1 true WO2009157525A1 (ja) | 2009-12-30 |
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| PCT/JP2009/061661 Ceased WO2009157525A1 (ja) | 2008-06-26 | 2009-06-25 | 3-メチル-2-チオフェンカルボン酸の製造方法 |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US8350057B2 (ja) |
| EP (1) | EP2298756B1 (ja) |
| JP (1) | JP5578809B2 (ja) |
| KR (1) | KR101583851B1 (ja) |
| CN (1) | CN102076677B (ja) |
| AU (1) | AU2009263303B2 (ja) |
| BR (1) | BRPI0913890A2 (ja) |
| DK (1) | DK2298756T3 (ja) |
| HU (1) | HUE032685T2 (ja) |
| IL (1) | IL210278A0 (ja) |
| PL (1) | PL2298756T3 (ja) |
| WO (1) | WO2009157525A1 (ja) |
Cited By (1)
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| WO2018079553A1 (ja) * | 2016-10-26 | 2018-05-03 | 石原産業株式会社 | 3-メチル-2-チオフェンカルボン酸の製造方法 |
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| CN103556686A (zh) * | 2013-10-25 | 2014-02-05 | 吴江市永利工艺制品有限责任公司 | 一种双层水槽滤斗 |
| AU2016242884B2 (en) * | 2015-03-31 | 2019-11-07 | Monsanto Technology Llc | Processes for the preparation of 2-thiophenecarbonyl chloride |
| EP3433242A4 (en) | 2016-03-24 | 2020-02-26 | Monsanto Technology LLC | METHOD FOR PRODUCING HETEROARYL CARBONIC ACIDS |
| CN106518840B (zh) * | 2016-11-17 | 2019-03-01 | 山东铂源药业有限公司 | 一种2-氯噻吩-5-甲酸的合成方法 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001247563A (ja) | 2000-03-03 | 2001-09-11 | Sumitomo Seika Chem Co Ltd | 3−メチル−2−チオフェンカルボン酸類の製造方法 |
| JP2008167970A (ja) | 2007-01-12 | 2008-07-24 | Fujishoji Co Ltd | 遊技機 |
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| AT376436B (de) * | 1982-11-05 | 1984-11-26 | Laevosan Gmbh & Co Kg | Verfahren zur herstellung neuer thiophen-2carbons[urederivate und pharmazeutisch vertraeglicher saeure- oder basenadditionssalze davon |
| JP2006008617A (ja) * | 2004-06-28 | 2006-01-12 | Sumitomo Chemical Co Ltd | 5−フタランカルボニトリル化合物の製造方法、その中間体およびその製造方法 |
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| JP2001247563A (ja) | 2000-03-03 | 2001-09-11 | Sumitomo Seika Chem Co Ltd | 3−メチル−2−チオフェンカルボン酸類の製造方法 |
| JP2008167970A (ja) | 2007-01-12 | 2008-07-24 | Fujishoji Co Ltd | 遊技機 |
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| E. CAMPAIGNE ET AL.: "Chlorination of thiophenes with sulfuryl chloride", JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, vol. 70, 1948, pages 415 - 416, XP008146566 * |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018079553A1 (ja) * | 2016-10-26 | 2018-05-03 | 石原産業株式会社 | 3-メチル-2-チオフェンカルボン酸の製造方法 |
| KR20190068520A (ko) | 2016-10-26 | 2019-06-18 | 이시하라 산교 가부시끼가이샤 | 3-메틸-2-티오펜카르복실산의 제조 방법 |
| JPWO2018079553A1 (ja) * | 2016-10-26 | 2019-09-19 | 石原産業株式会社 | 3−メチル−2−チオフェンカルボン酸の製造方法 |
| US10538503B2 (en) | 2016-10-26 | 2020-01-21 | Ishihara Sangyo Kaisha, Ltd. | Method for producing 3-methyl-2-thiophenecarboxylic acid |
| JP6996067B2 (ja) | 2016-10-26 | 2022-01-17 | 石原産業株式会社 | 3-メチル-2-チオフェンカルボン酸の製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102076677A (zh) | 2011-05-25 |
| JP2010030991A (ja) | 2010-02-12 |
| HUE032685T2 (en) | 2017-10-30 |
| EP2298756A1 (en) | 2011-03-23 |
| AU2009263303A1 (en) | 2009-12-30 |
| CN102076677B (zh) | 2014-11-05 |
| US8350057B2 (en) | 2013-01-08 |
| DK2298756T3 (en) | 2017-05-01 |
| KR20110025182A (ko) | 2011-03-09 |
| JP5578809B2 (ja) | 2014-08-27 |
| US20110112311A1 (en) | 2011-05-12 |
| BRPI0913890A2 (pt) | 2015-07-28 |
| EP2298756B1 (en) | 2017-03-08 |
| PL2298756T3 (pl) | 2017-08-31 |
| KR101583851B1 (ko) | 2016-01-08 |
| AU2009263303B2 (en) | 2013-02-28 |
| EP2298756A4 (en) | 2012-02-22 |
| IL210278A0 (en) | 2011-03-31 |
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