WO2005003073A1 - 5-ヨード-2-メチル安息香酸の製造方法 - Google Patents
5-ヨード-2-メチル安息香酸の製造方法 Download PDFInfo
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- WO2005003073A1 WO2005003073A1 PCT/JP2004/009696 JP2004009696W WO2005003073A1 WO 2005003073 A1 WO2005003073 A1 WO 2005003073A1 JP 2004009696 W JP2004009696 W JP 2004009696W WO 2005003073 A1 WO2005003073 A1 WO 2005003073A1
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- Prior art keywords
- methylbenzoic acid
- iodo
- acid
- producing
- reaction
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/347—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups
- C07C51/363—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups by introduction of halogen; by substitution of halogen atoms by other halogen atoms
Definitions
- the present invention relates to a method for producing 5-odo-2-methylbenzoic acid, which is a useful compound as a raw material for functional chemicals in addition to pharmaceuticals and agricultural chemicals, and to provide high-purity 5-odo-2-methylbenzoic acid More specifically, a method for producing iodine of 2-methylbenzoic acid to produce 5-iodo-12-methylbenzoic acid with high yield, high selectivity and high efficiency, and a method obtained by the method. High purity 5-about 1-2-methylbenzoic acid. Background art
- a method for synthesizing 5-methyl-2-benzoic acid is to react iodine with 2-methylbenzoic acid in the presence of sodium nitrite and fuming sulfuric acid. Hemica 1 Society, 1930, 503-3504) and potassium iodide and 2-methylbenzoic acid in the presence of thallium (III) trifluoroacetate
- a method of reacting an acid Journal of Chemical Society. Perk Trantransections I., 1979, 2405-5240) is known.
- the yield is extremely low at 18%, and since a large amount of a mixture of sodium nitrite and fuming sulfuric acid, which are powerful oxidizing agents, is used as a reaction reagent, safe handling is a problem. It becomes.
- the latter method has a low yield of only 33% and uses highly toxic potassium salts, which is not a feasible industrial method for producing 5-iodo-2-methylbenzoic acid. It is appropriate.
- the method using iodine monochloride has the characteristic that the reaction can be carried out in a simple one-step process.However, the reaction with an aromatic compound having an electron-withdrawing group such as benzoic acid has a low reaction activity. Low and good response results have not been obtained.
- the iodination reaction of benzoic acid is performed, but the yield of the product 3-iodobenzoic acid is about 43%. I'm crazy. Even if it is applied to the iodination of 2-methylbenzoic acid, high yields cannot be expected.
- the reaction system is the same as that of this method.
- the above-mentioned Japanese Patent Application Laid-Open No. 2003-12597 discloses a method for obtaining a methyl benzoate in the form of an acid catalyst together with an acid catalyst.
- a method of reacting 2-methylbenzoic acid using iodine and periodic acid is disclosed.
- the yield is only about 52 to 65%, and the purity of the product is only about 95%. Processes are required and the process becomes complicated.
- the catalyst such as sulfuric acid and high-boiling substances, is also present.
- This document shows a method of recycling the mother liquor to the reaction system.
- the product purity is reduced to 90%, which is not an appropriate method.
- the method of JP-A-2003-125957 has been improved, there are still many problems for industrial implementation, and the economics of the process remains questionable. .
- An object of the present invention is to oxidize 2-methylbenzoic acid as a raw material to produce 5-iodo-2-methylbenzoic acid, which simplifies the production process and produces high-purity products in high yield.
- the goal is to provide efficient and efficient business tools that can be used. Disclosure of the invention
- the present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, using 2-methylbenzoic acid as a raw material, in the presence of a microporous compound, iodine, an oxidizing agent, and acetic anhydride.
- a microporous compound iodine, an oxidizing agent, and acetic anhydride.
- the reaction proceeds in a highly selective manner, and by combining such a reaction step with a purification step consisting of sublimation, distillation or crystallization, the conventional method is used.
- the present inventors have found that high-purity 5-iodo-2-methylbenzoic acid, which has been impossible, can be obtained with high yield, easily and efficiently, and have reached the present invention.
- the present invention provides the following method for producing 5-iodo 2-methylbenzoic acid and high purity 5-iodo 2-methyl benzoic acid.
- Elements different from S i, A l, and O deposited in the structure of the skeleton of type 0 zeolite are N a, K, C s, C a, M g, T i, S n, and F (4)
- the method for producing 5-iodo-2-methylbenzoic acid which is at least one selected from e, Ni, Zn, Pb, and Ag.
- the purification by crystallization is carried out by crystallizing the reaction product at a temperature of 10 to 80 ° C (13) or (14) of 5-methyl-2-methylbenzoic acid. Production method.
- the purity of 5-iodo-2-methylbenzoic acid is not less than 99%, and iodine and iodine contained as impurities are contained.
- 2-methylbenzoic acid used as a reaction raw material is not particularly limited as long as it is industrially available, but in order to increase the purity of the final product, the purity is 98% or more. It is preferable to use one.
- an oxidizing agent coexists with iodine.
- iodic acid and phosphoric or periodic acid are particularly preferably used.
- the iodination reaction proceeds even with iodine alone, but compounds with an electron-withdrawing group such as 2-methylbenzoic acid have low reactivity, and the reactivity is enhanced by the coexistence of an oxidizing agent. There is a need.
- Iodine, iodic acid, and periodic acid are all solids at room temperature, but they may remain solid when subjected to the reaction, and may be dissolved or suspended using an appropriate solvent. It may be used turbid.
- the reaction step water is by-produced with the progress of the iodination reaction.
- a dehydrating agent those which act only on water and do not react with other components in the system are preferable, and inorganic compounds such as anhydrous sodium sulfate, anhydrous magnesium sulfate, calcium chloride, acetic anhydride, and propylene anhydride are preferable. Examples thereof include carboxylic anhydrides such as pionic acid, pivalic anhydride, and phthalic anhydride.
- acetic anhydride is used in view of the ease of separation and purification after the reaction.
- the microporous compound coexisting during the reaction is a compound having pores having a pore size on the order of nanometers, such as zeolite.
- the structure code of IUPAC is the 8-membered ring structure ABW, AEI, AFX, APC, ATN, ATT, A CV, AWW, CHA, DDR, EAB, ERI, GIS, J BW, KFI, LEV, LTA, MER, MON s P AU, PHI, RH ⁇ , RTE, RTH, VNI, 9-membered ring structure CHI, LOV, RSN, VSV, 10-membered ring structure DAC, EPI, FER, L AU, ME L, MF I, MF S, MTT, NES, TON, WE I, AFS, AFY, ATO, CAN, GME, MAZ, ME I, with 1-membered ring structure MTW, OFF, R ⁇ N, VET,
- Chabazite, Zeolite A, X, Y, L, ZSM— 5, mordenite, jS-type zeolite and the like are available, but those having a pore diameter of 0.5 or more are preferred for use in this reaction, and in particular, type-type zeolite is preferred. .
- the J3-type zeolite preferably has a molar ratio of Si to A 1 constituting the skeleton of 10 to 250.
- elements other than Si, Al, and O usually included in the structure of the skeleton such as Na, K :, Cs, Ca, Mg, Ti, Sn, Fe, Ni, Those in which Zn, Pd, and Ag exist in the skeleton or outside the skeleton by natural means or by artificial means such as hydrothermal synthesis or ion exchange / impregnation are preferably used.
- microporous compound any of crystal powder, compacted and pulverized product, extruded product, and tableted product may be used.
- reaction systems such as a batch system, a semi-batch system, a completely mixed circulation system, and a fixed bed circulation system can be adopted.
- the reaction method may be selected according to the production scale of the product.
- a batch method is appropriate for small-scale production, and a reaction is continuously performed by a complete mixed circulation method or a fixed bed circulation method for mass production. A more efficient production method is to be implemented.
- the reaction temperature is in the range of 50 to 200 ° C, preferably 70 to 150 ° C. By setting the temperature in such a range, a sufficient reaction rate can be obtained while suppressing side reactions such as generation of high-boiling substances.
- the reaction pressure is in the range of 0.05 to 2 MPa in absolute pressure, preferably in the range of 0.01 to 1 MPa.
- 2-Methylbenzoic acid has a melting point of 105 ° C, and does not necessarily require a reaction solvent when the reaction is carried out at a temperature higher than the melting point. However, usually, an organic solvent inert to iodination is used. It is preferable to use acetic acid, trifluorophenol, acetic acid, dichloromethane, carbon tetrachloride, dichlorobenzene, and chlorobenzene. Of these, acetic acid is particularly preferable.
- the amount of solvent used is 0.5 to 100 weight per 1 part by weight of 2-methylbenzoic acid It is preferably used in parts by weight, more preferably in the range of 1 to 50 parts by weight.
- iodine used in order to increase the conversion of 2-methylbenzoic acid, 0.1 to 1.5 parts by weight per 1 part by weight of 2-methylbenzoic acid is used. Preferably, it is used in an amount of 0.5 to 1 part by weight.
- the oxidizing agent such as iodic acid and periodic acid is preferably used in an amount of 0.01 to 1 part by weight, and more preferably 0 to 1 part by weight of iodine. The range is from 0.5 to 0.5 parts by weight.
- the amount of the microporous compound used is at least 0.05 part by weight, preferably at least 0.1 part by weight, based on 1 part by weight of the raw material 2-methylbenzoic acid. If the amount of the microporous compound used is less than this, sufficient reaction activity cannot be obtained, and 5-iodo-2-methylbenzoic acid cannot be obtained with high selectivity.
- the microporous compound is used by suspending it in the reaction solution. Separation of the reaction solution from the microporous compound can be easily performed by a general method such as sedimentation, centrifugation, or filtration. The separated microporous compound can be recycled to the reaction system for reuse. The recovered microporous compound may be reused for the reaction as it is, but may be used for the reaction after removing the attached product solution by washing with a suitable solvent.
- the solvent used for washing is not particularly limited, but it is preferable to use the same acetic acid as the reaction solvent in order to simplify the process.
- the solvent used for washing is preferably in the range of 1 to 10 parts by weight based on 1 part by weight of the recovered microporous compound.
- the activity decreases due to the adhesion of high boiling substances and the like, but can be reactivated by performing the following calcination treatment.
- the microporous compound recovered from the reaction product solution may be subjected to the calcination treatment as it is, but it is preferable to perform the calcination treatment after washing with a solvent such as acetic acid.
- micro After washing the porous compound, it is sufficiently dried by heating at 100 to 150 ° C., preferably for 2 hours or more.
- the dried microporous compound is calcined in air.
- the calcining temperature is preferably from 400 to 700 ° C, and the calcining time is preferably from 0.5 to 10 hours.
- the amount of acetic anhydride used as a dehydrating agent is 0.01 to 2 parts by weight, preferably 0.1 to 1 to 5 parts by weight, per 1 part by weight of the raw material 2-methylbenzoic acid. Range. By setting the amount of acetic anhydride in the above range, a sufficient reaction promoting effect can be obtained, and the conversion of the raw material, 2-methylbenzoic acid, can be increased. 'It is possible to produce 5-iodo 2-methylbenzoic acid economically without increasing recovery load.
- iodine, iodic acid, periodic acid, etc. are dissolved or suspended in water and charged into the reactor, the water used at that time is added to the amount used above. The required amount of acetic anhydride must be added to remove it.
- a reaction system such as a batch system, a semi-batch system, or a completely mixed circulation system is employed.
- the time is usually 1 to 20 hours, and in the case of a fixed bed flow system, it is usually 0.05 to lh as the LHSV (liquid hourly space velocity) of 2-methylbenzoic acid. -1 is adopted.
- the industrial production process of 5-iodo 2-methyl benzoic acid consists of two steps: iodination reaction step and purification step by sublimation, distillation, crystallization or a combination thereof. Has it as an essential process. After performing the iodination reaction by the above-mentioned method, a high-purity product of 5-iodo-2-methylbenzoic acid can be easily isolated by sublimation, distillation, crystallization, or the like.
- the product is more easily and efficiently
- a product is precipitated by cooling or addition of water.
- crystals begin to precipitate at 90 ° C or lower, and 70 ° / 0 or more of 5-iodo-2-methylbenzoic acid formed at 50 ° C or lower precipitates.
- the precipitated crystals can be collected by means such as filtration. Crystals can also be obtained by the addition of water, and the addition of 0.1 to 5 parts by weight of water per 1 part by weight of the reaction product solution results in the formation of 5-hydroxy-1,2-methylbenzoic acid. 90% or more precipitates.
- the precipitated crystals are usually collected by filtration.
- iodine crystals precipitate and may be mixed with 5-hydroxy-2-methylbenzoic acid, but sodium sulfite, sodium hydrogen sulfite or sodium thiosulfate.
- Preliminary addition of lime to the reaction solution can prevent iodine precipitation.
- the amount of addition of sodium sulfite, sodium hydrogen sulfite or sodium thiosulfate is less than 0.05 part by weight based on 1 part by weight of iodine used in the reaction. I will.
- the bottoms after distillation are concentrated in the mother liquor, which is dissolved in the mother liquor, and can be recovered by recycling to the crystallization system. Since high-boiling substances other than the product accumulate in the bottoms, it is necessary to purge some of them without recycling to the crystallization system. 5—Iodo 2-Improve the recovery of methylbenzoic acid and do not impair product purity For this reason, it is appropriate to recycle 50-90% of the components after the solvent has been recovered from the mother liquor.
- the total amount of iodine, iodine compounds, inorganic salts, transition metal compounds, zeolites, and metal oxides contained therein can be extremely high as 500 ppm or less.
- Example 1 except that 96.0 g of acetic acid, 9.2 g of acetic anhydride, 15-6 g of iodine, and 5.5 g of periodic acid instead of iodic acid were used. In the same manner as in the above, 28.5 g of a reaction product was obtained. As a result of the analysis, the following reaction results were obtained.
- the elements of the two genera were all less than 1 Ppm.
- the crystals of 5-metho-2-monomethylbenzoic acid obtained in Example 1 were 29.3 g. It was found that recovery could be increased without compromising P purity.
- Example 2 The same procedure as in Example 1 was carried out except that iodic acid was not used, to obtain 5 g of a product. As a result of the analysis, the following reaction results were obtained.
- Example 2 Except that acetic anhydride was not used, the same procedure as in Example 1 was carried out to obtain 18.5 g of a product. As a result of the analysis, the following reaction results were obtained.
- Example 9 The same operation as in Example 9 was performed except that the firing temperature was set at 380 ° C. As shown in Table 5, the activity recovered, but it clearly decreased with the number of reactions. Table 5 Number of reactions 7 8 9 1 0 Conversion 1 ⁇ 9 5.29 9 0.2 8 2.5 7 0.2
- Example 12 except that 336 g of acetic acid, 322 g of acetic anhydride, 544 g of iodine and 191 g of periodic acid were used instead of iodic acid. In the same manner as in the above, 99.4 g of white crystals of the product were obtained. As a result of the analysis, the following reaction results were obtained.
- the filtrate obtained after recovering the crystals of Example 12 was concentrated, and 80% (242 g) of 302 g of the crystals obtained was recycled to the crystallization system. Recycle The crystals were reacted in the same manner as in Example 12 and dissolved in a solution from which the H3-III zeolite had been removed, and then crystallized. The precipitated white crystals were collected by filtration to obtain a product, 121 Og. The purity of 5-iodo-2-methylbenzoic acid in the crystal is 99.6 ° /. Met. Analysis of the crystals showed that the iodine content was 5 ppm L i N a KM g C a ⁇ S r B a
- Example 15 except that 336 g of acetic acid, 322 g of acetic anhydride, 544 g of iodine and 191 g of periodic acid were used instead of iodic acid.
- Reaction product 111 g was obtained in the same manner as described above. As a result of the analysis, the following reaction results were obtained.
- 5-iodo-1-methylbenzoic acid can be industrially advantageously produced, and its significance is extremely large.
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- Chemical Kinetics & Catalysis (AREA)
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- Oil, Petroleum & Natural Gas (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
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Abstract
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Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE602004029787T DE602004029787D1 (de) | 2003-07-03 | 2004-07-01 | Verfahren zur herstellung von 5-iodo-2-methylbenzoesäure |
| EP04747165A EP1642881B1 (en) | 2003-07-03 | 2004-07-01 | Process for producing 5-iodo-2-methylbenzoic acid |
| US10/563,088 US7642374B2 (en) | 2003-07-03 | 2004-07-01 | Process for producing 5-iodo-2-methylbenzoic acid |
| KR1020057025347A KR101056563B1 (ko) | 2003-07-03 | 2004-07-01 | 5요오도2메틸벤조산의 제조 방법 |
Applications Claiming Priority (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003-270652 | 2003-07-03 | ||
| JP2003270652A JP4340858B2 (ja) | 2003-07-03 | 2003-07-03 | 5−ヨード−2−メチル安息香酸の製造方法 |
| JP2003-374483 | 2003-11-04 | ||
| JP2003374481A JP4400713B2 (ja) | 2003-11-04 | 2003-11-04 | 5−ヨード−2−メチル安息香酸の製造方法 |
| JP2003-374482 | 2003-11-04 | ||
| JP2003-374481 | 2003-11-04 | ||
| JP2003374483A JP4434692B2 (ja) | 2003-11-04 | 2003-11-04 | 5−ヨード−2−メチル安息香酸の製造方法 |
| JP2003374482A JP2005139078A (ja) | 2003-11-04 | 2003-11-04 | 5−ヨード−2−メチル安息香酸の製造方法 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2005003073A1 true WO2005003073A1 (ja) | 2005-01-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2004/009696 Ceased WO2005003073A1 (ja) | 2003-07-03 | 2004-07-01 | 5-ヨード-2-メチル安息香酸の製造方法 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7642374B2 (ja) |
| EP (1) | EP1642881B1 (ja) |
| KR (1) | KR101056563B1 (ja) |
| DE (1) | DE602004029787D1 (ja) |
| WO (1) | WO2005003073A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015054806A1 (zh) | 2013-10-18 | 2015-04-23 | 雅本化学股份有限公司 | 一种2-甲基-5-碘苯甲酸的制备及回收方法 |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7750182B2 (en) | 2003-02-10 | 2010-07-06 | Mitsubishi Gas Chemical Company, Inc. | Process for production of iodine compounds and process for production of high-purity 5-iodo-2-methylbenzoic acid |
| JP5322672B2 (ja) * | 2008-11-28 | 2013-10-23 | 住友化学株式会社 | ジベンゾオキセピン化合物の製造方法 |
| PT2773610T (pt) * | 2011-10-31 | 2017-12-07 | Imax Diagnostic Imaging Holding Ltd | Processo de iodação para a preparação de compostos 2,4,6- triiodoaminas aromáticas 3,5-dissubstituídas |
| CN104892405B (zh) * | 2015-05-25 | 2017-01-04 | 张家港市振方化工有限公司 | 一种烯酮废水中提取对氯苯甲酸的方法 |
| PL3820839T3 (pl) | 2018-09-25 | 2024-04-08 | Arxada Ag | Sposób wytwarzania 5-jodo-2-karboksybenzenosulfonianu |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59219241A (ja) * | 1983-05-30 | 1984-12-10 | Asahi Chem Ind Co Ltd | 芳香族化合物のオキシヨウ素化法 |
| EP0154236A1 (en) * | 1984-03-07 | 1985-09-11 | IHARA CHEMICAL INDUSTRY Co., Ltd. | Process for producing a halobenzene |
| JPS6191142A (ja) * | 1984-10-05 | 1986-05-09 | モンテデイペ・ソチエタ・ペル・アツイオニ | ヨードベンゼンの合成方法 |
| JPS61106527A (ja) * | 1984-10-16 | 1986-05-24 | モンテデイペ・ソチエタ・ペル・アツイオニ | ヨードベンゼンの合成方法 |
| JPH01502819A (ja) * | 1987-03-25 | 1989-09-28 | イーストマン ケミカル カンパニー | 沃素化置換芳香族化合物の製造方法 |
| JP2003012597A (ja) * | 2001-07-02 | 2003-01-15 | Ise Chemicals Corp | メチル安息香酸のモノヨード体の製造方法 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IN188375B (ja) * | 1997-02-21 | 2002-09-14 | Council Scient Ind Res | |
| JP2003089673A (ja) * | 2001-09-18 | 2003-03-28 | Ise Chemicals Corp | ヨード・2・メチル安息香酸混合物の分離精製方法 |
| US7750182B2 (en) * | 2003-02-10 | 2010-07-06 | Mitsubishi Gas Chemical Company, Inc. | Process for production of iodine compounds and process for production of high-purity 5-iodo-2-methylbenzoic acid |
-
2004
- 2004-07-01 DE DE602004029787T patent/DE602004029787D1/de not_active Expired - Lifetime
- 2004-07-01 EP EP04747165A patent/EP1642881B1/en not_active Expired - Lifetime
- 2004-07-01 KR KR1020057025347A patent/KR101056563B1/ko not_active Expired - Fee Related
- 2004-07-01 US US10/563,088 patent/US7642374B2/en not_active Expired - Fee Related
- 2004-07-01 WO PCT/JP2004/009696 patent/WO2005003073A1/ja not_active Ceased
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59219241A (ja) * | 1983-05-30 | 1984-12-10 | Asahi Chem Ind Co Ltd | 芳香族化合物のオキシヨウ素化法 |
| EP0154236A1 (en) * | 1984-03-07 | 1985-09-11 | IHARA CHEMICAL INDUSTRY Co., Ltd. | Process for producing a halobenzene |
| JPS6191142A (ja) * | 1984-10-05 | 1986-05-09 | モンテデイペ・ソチエタ・ペル・アツイオニ | ヨードベンゼンの合成方法 |
| JPS61106527A (ja) * | 1984-10-16 | 1986-05-24 | モンテデイペ・ソチエタ・ペル・アツイオニ | ヨードベンゼンの合成方法 |
| JPH01502819A (ja) * | 1987-03-25 | 1989-09-28 | イーストマン ケミカル カンパニー | 沃素化置換芳香族化合物の製造方法 |
| JP2003012597A (ja) * | 2001-07-02 | 2003-01-15 | Ise Chemicals Corp | メチル安息香酸のモノヨード体の製造方法 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP1642881A4 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015054806A1 (zh) | 2013-10-18 | 2015-04-23 | 雅本化学股份有限公司 | 一种2-甲基-5-碘苯甲酸的制备及回收方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1642881A4 (en) | 2007-07-18 |
| US7642374B2 (en) | 2010-01-05 |
| KR101056563B1 (ko) | 2011-08-11 |
| DE602004029787D1 (de) | 2010-12-09 |
| US20060167312A1 (en) | 2006-07-27 |
| EP1642881A1 (en) | 2006-04-05 |
| EP1642881B1 (en) | 2010-10-27 |
| KR20060080868A (ko) | 2006-07-11 |
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