WO1999002521A1 - Procedes d'elaboration de derives pyridiniques - Google Patents
Procedes d'elaboration de derives pyridiniques Download PDFInfo
- Publication number
- WO1999002521A1 WO1999002521A1 PCT/JP1998/003113 JP9803113W WO9902521A1 WO 1999002521 A1 WO1999002521 A1 WO 1999002521A1 JP 9803113 W JP9803113 W JP 9803113W WO 9902521 A1 WO9902521 A1 WO 9902521A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sodium
- solution
- perborate
- added
- anhydride
- Prior art date
Links
Classifications
-
- 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
- C07D401/12—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 chain containing hetero atoms as chain links
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- B01J31/04—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing carboxylic acids or their salts
Definitions
- the present invention relates to JP-A-6270 (Example 32), JP-A-61-50978 (Example 2), JP-A-54-141783 (Example 21) or JP-A-61-22079.
- the present invention relates to a high-yield, high-purity, and safe production method of sulfoxide useful as a pharmaceutical or an intermediate for producing a pharmaceutical such as a gastric acid secretion inhibitor and an anti-ulcer agent, which are described in Japanese Patent Application Publication No. Conventional technology
- JP-A-1-6270 EP-268956, US-5045552
- JP-A-61-50978 EP-174726, US-4628098
- JP-A-54-141783 EP Thioether, hydrogen peroxide, m-chloroperbenzoic acid, and the like, as described in JP-5129, US-4255431) and JP-A-61-22079 (EP-166287, US-4758579). It has been produced by oxidation with oxidizing agents such as sodium dichlorite and sodium bromite. (See the following reaction formula, wherein Ri to R 4 have the same meaning as described above.)
- Example 32 of JP-A-6270 thioether is oxidized using 0.96 equivalents (purity conversion) of m-chloroperbenzoic acid, but the yield of sulfoxide is 80%. However, the yield was not sufficient for an industrial production method.
- m-chloroperbenzoic acid was expensive and extremely disadvantageous in production cost.
- m-chloroperbenzoic acid has been designated as a dangerous substance and must be used and stored. Great care was required, and there were also problems that were difficult to handle in large quantities.
- the present inventors have intensively studied to improve the above problems. As a result, they have found that the desired sulfoxide (II) can be produced in a high yield, without producing a sulfone, safely and without using a halogenated hydrocarbon solvent, by the following method. It was completed.
- the present invention provides a thioether (I) represented by the following formula (I):
- R 1 is a hydrogen atom, a methoxy group or a difluoromethoxy group
- R 2 is a methyl group or a methoxy group
- R 3 is a 3-methoxypropoxy group, a methoxy group or a 2,2,2-trifluoro group.
- R 4 represents a hydrogen atom or a methyl group, respectively).
- thioether (I) is 2-4- (3-methoxypropoxy) -3-methylpyridine-2-yl described in JP-A-1-6270 (Example 31).
- Sulfoxide (II) is more specifically described in 2-4- (3-methoxypropoxy) -3-methylpyridine-2-yl] methylsulfur described in JP-A-6270 (Example 32).
- examples of the sulfoxide (II) include the following compounds.
- the present invention includes the above embodiments (a) and (b).
- the type of perborate as the oxidizing agent used in (a) is not limited, but usually a sodium salt is preferred.
- the hydrate may be formed, and the amount of hydration is not limited, but tetrahydrate or monohydrate is usually preferable.
- sodium 4 hydrate thereof perborate NaB0 3 -4H 2 0, CAS Registry Number: 10486- 00 - 7
- perborate Natoriumu monohydrate (land 3 0, CAS Registry Number: 10332-33 -9) is generally marketed as reagents and industrial raw materials.
- perborate used is not limited, it is usually 0.8 to 1.7 equivalents, more preferably 0.85 to 1.6 equivalents, and still more preferably 0.9 equivalents to thioether (I). Use ⁇ 1.5 equivalents.
- N-halosuccinimide used as the oxidizing agent used in (b) is not limited, but is usually N-chloro succinimide [NCS, CAS registration No .: 128-09-6] or N- Bromosuccinimide [NBS, CAS Registry No .: 128-08-5] is preferred.
- N-halosuccinic acid imide is generally commercially available as reagents, industrial raw materials, and the like.
- the amount of the N-octane succinimide used is not limited, either, but is usually 0.8 to 1.7 equivalents, more preferably 0.85 to 1.6 equivalents, and still more preferably 0.8 to 1.7 equivalents to thioether (I). 0.9-1.5 equivalents are used.
- 1,3-dihachito-5,5-dimethylhydantoin in (b) is not limited, but usually, 1,3-dichloro-5,5-dimethylhydantoin [CAS registration No .: 118-52-5] or 1,3-dibromo-5,5-dimethylhydantoin [CAS registration number: 77-48-5] is preferred.
- 1,3-Dihaguchi-5,5-dimethylhydantoin is also generally marketed as a reagent or industrial material.
- 1,3-diha-5,5-dimethylhydantoin is not limited, it is usually 0.3 to 1.0 equivalent, more preferably 0.35 to 0.3 equivalent to thioether (I). 9 equivalents are used, more preferably 0.4 to 0.8 equivalents.
- dichloroisocyanurate is not limited, but usually, sodium dichloroisocyanurate [Sodium Dichloroisocyanurate, CAS Registry No .: 2893-78-9] or potassium dichloroisocyanurate [Potassium Dichloroisocy anurate, CAS registration No .: 2244-21-5] is preferred. Note that dichloroisocyanurate is also generally commercially available as a reagent “industrial material”.
- the amount of dichloroisocyanurate used is also not limited, but is usually from 0.3 to 1.0 equivalent, more preferably from 0.35 to 0.9 equivalent, still more preferably from 0.3 to 1.0 equivalent to thioether (I). Use 4-0.8 equivalents.
- reaction is carried out in the presence of an acid anhydride or a metal catalyst, and it is sufficient that either of them is present.
- the acid anhydride in (a) is not limited as long as it is formed by dehydration of the same or different carboxylic acids, or as long as the bifunctional carboxylic acid is intramolecularly dehydrated.
- acetic anhydride, propionic anhydride, anhydrous succinic anhydride, succinic anhydride, maleic anhydride, benzoic anhydride or phthalic anhydride can be mentioned, and usually acetic anhydride and propionic anhydride are better. Give the result.
- the amount of the acid anhydride to be used is not limited, it is usually 0.8 to 1.7 equivalents, more preferably 0.85 to 1.6 equivalents, and still more preferably 0.9 to 1.7 equivalents to thioether (I). Use 5 equivalents.
- the metal catalysts in (a) are, specifically, vanadium pentoxide (V 2 (h), vanadyl acetylacetonate oxide (Vanadyl acetylacetonate, (CHs COCHCOCH 3) 2VO), molybdenum acetyl oxide Acetonate [Molybdenum Oxide Acetylaceto nate, (CHa COCHCOCHa) 2M0O 2], heptane molybdate ammonium tetrahydrate [Ammonium he tamolybdate tetrahydrate, (NH4) 6 ⁇ 7 ⁇ 24 ⁇ ⁇ 2 ⁇ ] ammonium molybdate molybdate, (NH 4 ) 2M0O4], sodium vanadate (NaVOs),
- the amount of the metal catalyst used is not limited, but the use of 0.05 to 0.15 equivalents to the perborate gives preferable results.
- the reaction is carried out in the presence of a base.
- the base in (b) is not particularly limited as long as it is inert to thioether (1), sulfoxide (II) or an oxidizing agent, but usually an inorganic base is preferable, and more specifically, ,
- sodium hydroxide, potassium hydroxide, lithium hydroxide, sodium carbonate, potassium carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate, sodium phosphate, potassium phosphate, sodium hydrogen phosphate, sodium formate, potassium formate, acetic acid Examples include sodium and potassium acetate, and a mixture of two or more kinds may be used.
- the amount of the base used is not limited, it is usually 0.8 to 4.0 equivalents, more preferably 0.85 to 3.5 equivalents, and still more preferably 0.9 to N-halosuccinimide. Use ⁇ 3.0 equivalents.
- 3-dihau-5,5-dimethylhydantoin or dichloroisocyanurate usually 0.4 to 2.0 equivalents, more preferably 0.4 to 1.75 equivalents, More preferably, 0.4 to 1.5 equivalents are used.
- thioether (1) thioether (1), sulfoxide (11), and (a) a solvent that is inactive with respect to perborate, (b) a solvent that is inert with respect to oxidizing agents or bases, and It is not limited as long as it is present, and may be used alone or as a mixture. However, usually in (a), methanol, ethanol, propanol, methanol / toluene, ethanol Z toluene, propanol / toluene, water Z methanol, water ethanol, water Z propanol, toluene / dimethylformamide mixed solvent or acetic acid are used. Gives favorable results.
- (B) shows N, N-dimethylformamide, acetonitrile, toluene, tetra
- the solvent may be a mixture.
- a solvent in W more than one kind of solvent selected from N, N-dimethylformamide, acetonitrile, toluene, tetrahydrofuran or lower fatty acid ester in combination in the presence of water is more preferable.
- the amount of water used is not limited, but usually 0.1 to 50 ml, more preferably 0.25 to 20 ml, and even more preferably 0.5 to 10 ml, based on thioether (I) lg. Use.
- the lower fatty acid ester according to (b) is not limited as long as it is formed by dehydrating lower fatty acids having 6 or less carbon atoms and lower alcohols having 6 or less carbon atoms, and more specifically, For example, methyl formate, ethyl formate, propyl formate, butyl formate, amyl formate, methyl acetate, ethyl acetate, n-propyl acetate, i-propyl acetate, n-butyl acetate, i-butyl acetate, t-butyl acetate, n-acetic acid -Amyl, i-amyl acetate, sec-amyl acetate, t-amyl acetate, II-butyl propionate, ethyl ethyl butyrate, i-propyl butyrate, methyl isobutyrate, ethyl ethyl isobutyrate, methyl va
- the mixing ratio is not limited, and the mixing can be carried out at an arbitrary ratio.
- the amount of the solvent used is not limited, it is usually 1 to 100 ml, preferably 5 to 50 ml, more preferably 10 to 30 ml, based on lg of the thioether (I).
- the reaction temperature is not limited, it is generally ⁇ 50 to room temperature, more preferably (a) at ⁇ 40 to 10 ° C., and (b) ⁇ 30 ° to 2 (°), more preferably (a) -30 at ⁇ 0, and (b) at -20 at 11 (performed at TC.
- the order in which the reagents (raw materials) are added in the present reaction is not limited, but, for example, a better result can be obtained by performing the following order.
- a perborate is suspended in a solvent, and a mixed solution of an acid anhydride and a solvent is added dropwise thereto.
- the reaction time depends on the amount of solvent used, the reaction temperature, and in (a) the amount of perborate used, In (b), it depends on the type and amount of the oxidizing agent, but it usually takes about 30 minutes to 6 hours.
- the treatment after the completion of the reaction is not limited.
- a reducing agent such as sodium sulfite or sodium thiosulfate is further added to decompose excess reagents and adjust the pH of the aqueous phase as necessary. Extract with solvent.
- the reaction mixture is then concentrated under reduced pressure, or the precipitated crystals are collected by filtration.
- the obtained sulfoxide (II) can be purified by a conventional method such as crystallization, recrystallization, and column chromatography.
- Tetrahedron Letters, 29 (24), 2967-2968, 1988 describes sodium perborate tetrahydrate in methylene chloride in the presence of acetic anhydride. Oxidized olefins to obtain epoxides or ⁇ , / 3-diol monoacetates, but this is completely different from the reaction of oxidizing thioethers according to the present invention to obtain sulfoxides.
- JP-A-54-141783 discloses that oxidizing agents that can be used to oxidize thioethers to sulfoxides include nitric acid, hydrogen peroxide, peracid, perester, ozone, and tetroxide. Nitrogen, sodium benzene, tribenzoyl benzotriazole, tertiary butyl hypochloride, complex of diazobicyclo [2,2,2] octane with bromine, sodium metaperiodate, selenium dioxide, manganese dioxide, chromic acid N-halosuccinimide is described, along with Celica ammonium dinitrate, bromine, chlorine and sulfuryl chloride.
- FIG. 1 shows the results of 2-([4- (3-methoxypropoxy) -3-methylpyridin-2-yl] methylsulfinyl I-1H-benzimidazole (Rabeprazole free bae) obtained in Example 1.
- Se is an HPLC chart showing that the product has high purity.
- the filtrate was adjusted to pH 7 by adding about 3 ml of formic acid, and the aqueous phase was extracted once with 25 ml of ethyl acetate and once with 10 ml.
- the organic phase was washed with 10 ml of saturated saline, concentrated under reduced pressure, and 20 ml of ethyl acetate, 12 ml of toluene and 20 ml of n-hexane were added to the residue, and the mixture was stirred at -15 ° C for 11 hours. After filtering the precipitated crystals under reduced pressure, t-butyl methyl ether
- Oxidants other than those described above disclosed in Japanese Patent Application Laid-Open No. 54-141783 have various problems such as unstable-hazardous substances (explosives), large quantities are not available, expensive, and pollution. It was not suitable.
- perborate especially sodium perborate tetrahydrate
- the price of perborate, especially sodium perborate tetrahydrate is It is about 1/10 of that of perfumed acid, and its production cost is very good.
- perborates especially sodium perborate tetrahydrate and N-halosuccinic acid are not dangerous substances, and can be easily handled in large quantities. It is clear that this is a production method.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Plural Heterocyclic Compounds (AREA)
- Pyridine Compounds (AREA)
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/462,180 US6313303B1 (en) | 1997-07-11 | 1998-07-10 | Process for the preparation of pyridine derivatives |
KR1020007000248A KR100570104B1 (ko) | 1997-07-11 | 1998-07-10 | 피리딘 유도체의 제조방법 |
CA002295817A CA2295817C (en) | 1997-07-11 | 1998-07-10 | Method for producing pyridine compound |
DE69814862T DE69814862T2 (de) | 1997-07-11 | 1998-07-10 | Verfahren zur herstellung von pyridinderivaten |
EP98931055A EP0997461B1 (en) | 1997-07-11 | 1998-07-10 | Processes for the preparation of pyridine derivatives |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18609597 | 1997-07-11 | ||
JP9/186095 | 1997-07-11 | ||
JP9/197119 | 1997-07-23 | ||
JP9197119A JPH1171371A (ja) | 1997-07-23 | 1997-07-23 | ピリジン誘導体の製造方法 |
JP10/117706 | 1998-04-28 | ||
JP11770698 | 1998-04-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999002521A1 true WO1999002521A1 (fr) | 1999-01-21 |
Family
ID=27313438
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1998/003113 WO1999002521A1 (fr) | 1997-07-11 | 1998-07-10 | Procedes d'elaboration de derives pyridiniques |
Country Status (7)
Country | Link |
---|---|
US (1) | US6313303B1 (ja) |
EP (2) | EP1300406B1 (ja) |
KR (2) | KR100570104B1 (ja) |
CN (1) | CN1169807C (ja) |
CA (1) | CA2295817C (ja) |
DE (2) | DE69814862T2 (ja) |
WO (1) | WO1999002521A1 (ja) |
Cited By (4)
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WO1999047514A1 (en) * | 1998-03-17 | 1999-09-23 | Knoll Aktiengesellschaft | Chemical process for the production of sulphinyl derivatives by oxidation of the corresponding co-derivatives with perborates |
JP2003527370A (ja) * | 2000-03-13 | 2003-09-16 | エステベ・キミカ・ソシエダッド・アノニマ | チオエーテル基をスルホキシド基に酸化するための方法 |
KR100464174B1 (ko) * | 2002-03-06 | 2005-01-03 | 코오롱유화주식회사 | 설피닐 벤즈이미다졸 유도체의 제조방법 |
CN103086997A (zh) * | 2013-01-30 | 2013-05-08 | 西安近代化学研究所 | 3,3’-二氨基-4,4’-偶氮氧化呋咱的合成方法 |
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KR100873419B1 (ko) * | 2002-06-18 | 2008-12-11 | 페어차일드코리아반도체 주식회사 | 높은 항복 전압, 낮은 온 저항 및 작은 스위칭 손실을갖는 전력용 반도체 소자 |
AU2003258335A1 (en) * | 2002-08-21 | 2004-03-11 | Teva Pharmaceutical Industries Ltd. | A method for the purification of lansoprazole |
PT1465890E (pt) * | 2002-11-18 | 2007-05-31 | Teva Pharma | Lansoprazole estável contendo mais de 500 ppm, até cerca de 3000 ppm de água e mais de 200 ppm, até cerca de 5000 de álcool |
BR0317425A (pt) * | 2002-12-16 | 2005-11-16 | Ranbaxy Lab Ltd | Sal de rabeprazol, composição farmacêutica contendo o mesmo e processo para sua preparação |
CA2510849A1 (en) * | 2002-12-19 | 2004-07-08 | Teva Pharmaceutical Industries Ltd | Solid states of pantoprazole sodium, processes for preparing them and processes for preparing known pantoprazole sodium hydrates |
EP1583507A2 (en) * | 2003-01-07 | 2005-10-12 | Ranbaxy Laboratories Limited | Magnesium salt of imidazole derivative |
US7678816B2 (en) * | 2003-02-05 | 2010-03-16 | Teva Pharmaceutical Industries Ltd. | Method of stabilizing lansoprazole |
US20040235904A1 (en) * | 2003-03-12 | 2004-11-25 | Nina Finkelstein | Crystalline and amorphous solids of pantoprazole and processes for their preparation |
MXPA05013316A (es) | 2003-06-10 | 2006-03-17 | Teva Pharma | Proceso para preparar bencimidazoles 2[-(piridinil)metil]sulfinil-sustituidos y derivados clorados novedosos de pantoprazol. |
WO2005077936A1 (en) | 2004-02-11 | 2005-08-25 | Ulkar Kimya Sanayii Ve Ticaret A.S. | Pyridine benzimidazole sulfoxides with high purity |
EP1681056A1 (en) * | 2005-01-14 | 2006-07-19 | Krka Tovarna Zdravil, D.D., Novo Mesto | Process for preparing lansoprazole |
KR100758600B1 (ko) * | 2006-01-05 | 2007-09-13 | 주식회사 대웅제약 | 란소프라졸 결정형 a의 제조방법 |
EP1818331A1 (en) | 2006-02-14 | 2007-08-15 | EOS Eczacibasi Ozgun Kimyasal Urunler Sanayi Ve Ti Caret A.S. | Process for the preparation of 2-[{4-(3-methoxypropoxy)-3-methylpyridin-2-yl}methylsulfinyl]-1H-benzimidazole substantially free of sulfone impurity |
KR100771655B1 (ko) | 2006-04-24 | 2007-10-30 | 주식회사 카이로제닉스 | 라베프라졸 및 그 중간체의 제조방법 |
WO2007129328A2 (en) * | 2006-05-09 | 2007-11-15 | Cadila Healthcare Limited | Process for preparing 2-[pyridinyl]sulfinyl-substituted benzimidazoles |
WO2010134099A1 (en) | 2009-05-21 | 2010-11-25 | Cadila Healthcare Limited | One pot process for preparing omeprazole and related compounds |
CN103012369B (zh) * | 2011-05-23 | 2014-04-23 | 中山大学 | 兰索拉唑n晶型及其制备方法和应用 |
CN102180866B (zh) * | 2011-05-23 | 2013-03-13 | 中山大学 | 兰索拉唑晶型及其制备方法和应用 |
CN104203938A (zh) | 2012-01-21 | 2014-12-10 | 朱比兰特生命科学有限公司 | 用于制备2-吡啶基甲基亚硫酰基苯并咪唑、它们的类似物和光学活性对映体的方法 |
WO2014091450A1 (en) | 2012-12-12 | 2014-06-19 | Ranbaxy Laboratories Limited | Process for the preparation of rabeprazole |
CN104418837A (zh) * | 2013-08-19 | 2015-03-18 | 长沙市如虹医药科技有限公司 | 一种氧化硫醚成亚砜的方法 |
EP3187494A1 (en) | 2015-12-30 | 2017-07-05 | KRKA, tovarna zdravil, d.d., Novo mesto | Process for the preparation of pantoprazole sodium sesquihydrate |
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1998
- 1998-07-10 DE DE69814862T patent/DE69814862T2/de not_active Expired - Lifetime
- 1998-07-10 DE DE69826900T patent/DE69826900T2/de not_active Expired - Lifetime
- 1998-07-10 WO PCT/JP1998/003113 patent/WO1999002521A1/ja active IP Right Grant
- 1998-07-10 EP EP03000566A patent/EP1300406B1/en not_active Expired - Lifetime
- 1998-07-10 EP EP98931055A patent/EP0997461B1/en not_active Expired - Lifetime
- 1998-07-10 CN CNB988083086A patent/CN1169807C/zh not_active Expired - Fee Related
- 1998-07-10 CA CA002295817A patent/CA2295817C/en not_active Expired - Fee Related
- 1998-07-10 US US09/462,180 patent/US6313303B1/en not_active Expired - Fee Related
- 1998-07-10 KR KR1020007000248A patent/KR100570104B1/ko not_active IP Right Cessation
- 1998-07-10 KR KR1020057017623A patent/KR100559169B1/ko not_active IP Right Cessation
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See also references of EP0997461A4 * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999047514A1 (en) * | 1998-03-17 | 1999-09-23 | Knoll Aktiengesellschaft | Chemical process for the production of sulphinyl derivatives by oxidation of the corresponding co-derivatives with perborates |
JP2003527370A (ja) * | 2000-03-13 | 2003-09-16 | エステベ・キミカ・ソシエダッド・アノニマ | チオエーテル基をスルホキシド基に酸化するための方法 |
AU2001237452B2 (en) * | 2000-03-13 | 2005-01-13 | Esteve Quimica, S.A. | Method for oxidizing a thioether group into a sulfoxide group |
AU2001237452B9 (en) * | 2000-03-13 | 2005-01-27 | Esteve Quimica, S.A. | Method for oxidizing a thioether group into a sulfoxide group |
KR100464174B1 (ko) * | 2002-03-06 | 2005-01-03 | 코오롱유화주식회사 | 설피닐 벤즈이미다졸 유도체의 제조방법 |
CN103086997A (zh) * | 2013-01-30 | 2013-05-08 | 西安近代化学研究所 | 3,3’-二氨基-4,4’-偶氮氧化呋咱的合成方法 |
CN103086997B (zh) * | 2013-01-30 | 2015-05-13 | 西安近代化学研究所 | 3,3’-二氨基-4,4’-偶氮氧化呋咱的合成方法 |
Also Published As
Publication number | Publication date |
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CN1169807C (zh) | 2004-10-06 |
EP0997461B1 (en) | 2003-05-21 |
DE69826900D1 (de) | 2004-11-11 |
KR100559169B1 (ko) | 2006-03-10 |
DE69814862T2 (de) | 2004-02-19 |
EP1300406A1 (en) | 2003-04-09 |
EP0997461A1 (en) | 2000-05-03 |
KR20010021689A (ko) | 2001-03-15 |
CA2295817A1 (en) | 1999-01-21 |
DE69826900T2 (de) | 2005-11-24 |
US6313303B1 (en) | 2001-11-06 |
CA2295817C (en) | 2008-02-12 |
EP1300406B1 (en) | 2004-10-06 |
DE69814862D1 (de) | 2003-06-26 |
EP0997461A4 (en) | 2002-01-09 |
KR100570104B1 (ko) | 2006-04-11 |
CN1267295A (zh) | 2000-09-20 |
KR20050096988A (ko) | 2005-10-06 |
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