WO2013151250A1 - 고순도 메티오졸린의 공업적 제조방법 - Google Patents
고순도 메티오졸린의 공업적 제조방법 Download PDFInfo
- Publication number
- WO2013151250A1 WO2013151250A1 PCT/KR2013/002160 KR2013002160W WO2013151250A1 WO 2013151250 A1 WO2013151250 A1 WO 2013151250A1 KR 2013002160 W KR2013002160 W KR 2013002160W WO 2013151250 A1 WO2013151250 A1 WO 2013151250A1
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- WO
- WIPO (PCT)
- Prior art keywords
- methiozoline
- solvent
- water
- mixed solvent
- formula
- Prior art date
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- UEGXABPZEXKSPG-UHFFFAOYSA-N Fc1cccc(F)c1COCc(c(F)ccc1)c1F Chemical compound Fc1cccc(F)c1COCc(c(F)ccc1)c1F UEGXABPZEXKSPG-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D413/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms
- C07D413/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings
- C07D413/04—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings directly linked by a ring-member-to-ring-member bond
-
- 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
- B01J31/0234—Nitrogen-, phosphorus-, arsenic- or antimony-containing compounds
- B01J31/0271—Nitrogen-, phosphorus-, arsenic- or antimony-containing compounds also containing elements or functional groups covered by B01J31/0201 - B01J31/0231
Definitions
- the present invention relates to an industrial production method for producing methiozoline in high purity through a process of crystallization and purification of the resulting organic layer concentrate after reacting the alkali metal base with a phase transfer catalyst and a water-organic solvent.
- US Patent No. 6,838,416 B2 discloses a thiophenisoxazoline compound represented by the following formula (4) with respect to the herbicidal active substance of the thiophenisoxazoline chemical structure.
- X 1 , X 2 , X 3 are each a hydrogen atom, an alkyl group, a halogen group, a methoxy group and a nitro group, and Y 1 , Y 2 , Y 3 each represent a hydrogen atom or a fluorine atom).
- the patent discloses synthesis of thiophenisoxazolin derivatives including the compound of Formula 1 using sodium hydride as a base under anhydrous conditions, which is suitable for small synthesis in a laboratory, but industrial mass production. The method is not suitable.
- reaction product was extracted with an organic solvent, concentrated, and purified first through column chromatography, and the first purified product was recrystallized again in hexane to obtain a target product in about 60% yield.
- This production method requires anhydrous conditions to use sodium hydride as a base, and requires the first purification by column chromatography to remove the mineral oil contained in the sodium hydride after the reaction. Applicable only to small amounts of synthetic methods, and not as an industrial synthesis method for mass production.
- reaction base was reacted at 60-70 ° C. in THF solvent using sodium hydroxide as a reaction base.
- the reaction was then extracted with an organic solvent and concentrated, first purified by column chromatography, and the first purified product was recrystallized again in hexane to give the desired product in about 60% yield.
- the yield is low, and since the first purification is performed by column chromatography, it is not suitable as an industrial mass synthesis method.
- An object of the present invention is to provide a high-purity methiozoline as an industrial production method in the commercialization of methiozoline, which is a compound of Formula 1.
- the present inventors have tried to develop a new industrial synthesis method for synthesizing methiozoline, which is a compound represented by Chemical Formula 1, in high purity and high yield, and as a result, an alkali metal base and a phase transfer catalyst are used in a mixed solvent of water and an organic solvent.
- an alkali metal base and a phase transfer catalyst are used in a mixed solvent of water and an organic solvent.
- the reaction conditions for minimizing the by-products were established while reacting difluorobenzyl (chloride or bromide) (compound 3) with a raw material, and the obtained product was easily crystallized and purified without using column chromatography. It was found and completed the present invention.
- the present invention is 4,5-dihydro-5-methyl-3- ⁇ (3-methylthiophen-2-yl) -isoxazole represented by the formula (2) -5-yl ⁇ methanol and the 2,6-difluorobenzyl (chloride or bromide) represented by the formula (3) using an alkali metal base and a phase transfer catalyst in a mixed solvent of water and an organic solvent at a temperature of 50 ⁇ 100 °C
- methiozoline represented by the formula (1) prepared by reacting with, more specifically 4,5-dihydro-5-methyl-3- ⁇ (3-methylthiophene represented by the formula (2) -2-yl) -isoxazol-5-yl ⁇ methanol and 2,6-difluorobenzyl (chloride or bromide) represented by the formula (3) using an alkali metal base and a phase transfer catalyst in a mixed solvent of water and an organic solvent.
- reaction mixture was reacted at a reaction temperature of 50 to 100 ° C., and the concentrated solution of the separated organic layer was washed with water / alcohol or It provides a method for producing highly pure methoxy thio sleepy (I) comprising the step of preparing was crystallized from a mixed solvent of alcohol / aliphatic hydrocarbon.
- the present invention is to select the optimum mixture of water, organic solvent, base and catalyst to react the compound of Formula 2 and the compound of Formula 3 under the conditions of maintaining a constant reaction temperature to recrystallize the product produced through the selected solvent system
- the present invention relates to a method for economically synthesizing high purity methiozoline under specified conditions for purification through.
- Compound of Formula 2 used as a raw material in the present invention is a known compound disclosed in US Pat. No. 6,838,416 B2, which can be synthesized and purified by a known method, and Compound 3 is a commercially available compound.
- the amount of compound 3 used is preferably 1.0 to 1.2 equivalents based on compound 2.
- a mixed solvent of water and an organic solvent is used as the reaction solvent, and as the organic solvent used, benzene, toluene, xylene, chlorobenzene, 1,2-dichloroethane, and the like are used. 1,2-dichloroethane is preferred, and the ratio of water and organic solvent is preferably 2: 8 to 8: 2 by volume ratio.
- Alkali metal base is selected and used as the base used for the reaction, preferably lithium hydroxide, sodium hydroxide and potassium hydroxide, etc., the amount of the base is used 4.0 to 6.0 moles with respect to the hydroxy compound of formula (2) It is preferable.
- Phase transfer catalysts used to activate the reaction are ammonium salts, preferably tetrabutylammoniumhydrogensulfate, tetrabutylammonium iodide, tetraethylammonium bromide, tetraethylammonium chloride, tetrabutylammonium bromide, tetrabutylammonium chloride and benzyl Triethylammonium bromide and the like, and preferred as phosphonium salts include, but are not limited to, tetraethylphosphonium bromide, tetrabutylphosphonium bromide, tetrabutylphosphonium chloride, and the like. 0.1 equivalent.
- the reaction temperature is good 50 ⁇ 100 °C but considering the yield and purity 55 ⁇ 80 °C is preferred, more preferably 60 ⁇ 65 °C.
- reaction solution was cooled and the separated organic layer was dried and concentrated to obtain a concentrated solution of water / C 1 to C 4 alcohol or C 1 to C 4 alcohol / C 5 to C 7 aliphatic hydrocarbon.
- water / C 1 ⁇ C 4 alcohol in the solvent system as a C 1 ⁇ C 4 alcohol solvent which is used for crystallization is methanol, ethanol, propanol, isopropanol, n- butanol, and water / C 1 ⁇ C 4 alcohol
- the ratio is preferably 1: 3 to 1:10 by volume, and the amount of water is preferably used 4 to 6 times by weight relative to hydroxy compound 2.
- Hydrocarbons used for crystallization in a mixed solvent system of C 1 to C 4 alcohols / C 5 to C 7 aliphatic hydrocarbons are n-pentane, n-hexane and n-heptane, and C 1 to C 4 alcohol solvents.
- roneun methanol, and ethanol, n- propanol, isopropanol and n- butanol, C 1 ⁇ C 4 ratio of the aliphatic hydrocarbons, alcohols and C 5 ⁇ C 7 are in a volume ratio 1: preferred to use a 50: 5 to 1
- the amount of alcohol used is preferably used 0.2 to 1 times by weight relative to hydroxy compound 2.
- the crystallization temperature is preferably -20 ° C to 20 ° C, but more preferably -10 ° C to 10 ° C.
- the purity of the synthesized methiozoline of the present invention is preferably 99% or more, more preferably 99.0 to 99.9%, but is not limited thereto.
- Decolorized activated carbon (2kg) was added to the separated brown organic layer, stirred for about 0.5 hours, filtered to remove activated carbon, the filtrate was placed in a 250L reactor, and toluene was distilled off under reduced pressure at 60 ° C, and isopropanol (120L) was removed from the residue. It is dissolved completely at about 50 °C.
- the isopropanol / water (240L / 120L) mixed solution was slowly added dropwise to the 630GL reactor at about 0 ° C. while slowly dropping the previously prepared isopropanol solution to produce a solid. After completion of the charge, the mixture was kept at 0 ° C. for about 1 hour and then filtered.
- the separated organic layer was washed twice with water (194 L), and toluene was distilled off under reduced pressure at 90 ° C. to completely remove it. Then, isopropanol (47 L) and n-heptane (473 L) were added thereto, and the mixture was heated to 60 ° C. to 70 ° C. to completely dissolve it. After cooling slowly to 0 °C and left for 12 hours. The reaction solution was filtered and the filtered solid was washed with n-hexane (95 L) and vacuum dried at 30 ° C. for 6 hours to yield 148 kg of methiozoline (yield: 92%, purity: 99.5%) as a white solid (mp : 50 to 52 ° C.).
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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)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
Abstract
Description
Claims (8)
- 제1항에 있어서, 상기 유기용매는 벤젠, 톨루엔, 자일렌, 클로로벤젠 및 1,2-다이클로로에탄로 이루어진 군으로부터 선택되는 것을 특징으로 하는 제조방법.
- 제1항에 있어서, 알칼리금속염기는 수산화나트륨, 수산화칼륨 및 수산화리튬으로 이루어진 군으로부터 선택되는 것을 특징으로 하는 제조방법.
- 제1항에 있어서, 상전이촉매는 테트라부틸암모니움하이드로겐설페이트, 테트라부틸암모늄브로마이드 및 테트라부틸포스포니움브로마이드로 이루어진 군으로부터 선택되는 것을 특징으로 하는 제조방법.
- 제1항에 있어서, 상기 유기층 농축액을 결정화하여 메티오졸린을 정제하는 용매는 물/C1~C4 알코올 또는 C1~C4 알코올/C5~C7 지방족탄화수소의 혼합용매인 것을 특징으로 하는 제조방법.
- 제5항에 있어서, 상기 유기층 농축액을 결정화하여 메티오졸린을 정제하는 용매는 물/이소프로판올 또는 이소프로판올/n-헵탄의 혼합용매인 것을 특징으로 하는 제조방법.
- 제1항에 있어서, 반응액으로 사용하는 물과 유기용매의 혼합용매에서 유기용매로 톨루엔을 사용하고, 상기 염기로 수산화나트륨을 사용하고, 상전이촉매로 테트라부틸포스포니움브로마이드를 사용하여 60~65℃의 온도로 반응하고, 유기층 농축액을 이소프로판올/n-헵탄의 혼합용매를 사용하여 결정화하는 것을 특징으로 하는 제조방법.
- 제1항에 있어서, 상기 고순도는 99% 이상의 순도인 것을 특징으로 하는 제조방법.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13772127.0A EP2835371B1 (en) | 2012-04-02 | 2013-03-18 | Industrial method for manufacturing high-purity methiozoline |
CA2867936A CA2867936C (en) | 2012-04-02 | 2013-03-18 | Industrial method for manufacturing high-purity methiozolin |
CN201380017314.6A CN104245692B (zh) | 2012-04-02 | 2013-03-18 | 用于制备高纯度methiozolin的工业方法 |
US14/398,114 US9303022B2 (en) | 2012-04-02 | 2013-03-18 | Industrial method for the preparation of high-purity methiozolin |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020120033835A KR101201203B1 (ko) | 2012-04-02 | 2012-04-02 | 고순도 메티오졸린의 공업적 제조방법 |
KR10-2012-0033835 | 2012-04-02 |
Publications (1)
Publication Number | Publication Date |
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WO2013151250A1 true WO2013151250A1 (ko) | 2013-10-10 |
Family
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PCT/KR2013/002160 WO2013151250A1 (ko) | 2012-04-02 | 2013-03-18 | 고순도 메티오졸린의 공업적 제조방법 |
Country Status (6)
Country | Link |
---|---|
US (1) | US9303022B2 (ko) |
EP (1) | EP2835371B1 (ko) |
KR (1) | KR101201203B1 (ko) |
CN (1) | CN104245692B (ko) |
CA (1) | CA2867936C (ko) |
WO (1) | WO2013151250A1 (ko) |
Families Citing this family (1)
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WO2019243101A1 (en) | 2018-06-20 | 2019-12-26 | Basf Se | Method for controlling herbicide resistant or tolerant weeds |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6838416B2 (en) | 2000-09-07 | 2005-01-04 | Korea Research Institute Of Chemical Technology | Herbicidal 5-benzyloxymethyl-1,2-isoxazoline derivatives |
US7998902B2 (en) | 2007-06-22 | 2011-08-16 | Moghu Research Center Ltd. | Use of 5-benzyloxymethyl-1,2-isoxazoline derivatives as a herbicide |
-
2012
- 2012-04-02 KR KR1020120033835A patent/KR101201203B1/ko active IP Right Grant
-
2013
- 2013-03-18 CA CA2867936A patent/CA2867936C/en active Active
- 2013-03-18 EP EP13772127.0A patent/EP2835371B1/en active Active
- 2013-03-18 WO PCT/KR2013/002160 patent/WO2013151250A1/ko active Application Filing
- 2013-03-18 CN CN201380017314.6A patent/CN104245692B/zh active Active
- 2013-03-18 US US14/398,114 patent/US9303022B2/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6838416B2 (en) | 2000-09-07 | 2005-01-04 | Korea Research Institute Of Chemical Technology | Herbicidal 5-benzyloxymethyl-1,2-isoxazoline derivatives |
US7998902B2 (en) | 2007-06-22 | 2011-08-16 | Moghu Research Center Ltd. | Use of 5-benzyloxymethyl-1,2-isoxazoline derivatives as a herbicide |
Non-Patent Citations (5)
Title |
---|
BULL. KOREAN CHEM. SOC., vol. 33, no. 1, 2012, pages 297 - 300 |
HWANG, I. T. ET AL.: "5-(2,6-Difluorobenzyl)oxymethyl-5-methyl-3-(3-methylthiophen-2- yl)-1,2-isoxazoline as a Useful Rice Herbicide.", JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, vol. 53, 2005, pages 8639 - 8643, XP055171520 * |
J. AGRIC. FOOD CHEM., vol. 53, 2005, pages 8639 - 8643 |
NAM, J. H. ET AL.: "Synthesis and Herbicidal Activities of Enantiopure Methiozolines.", BULLETIN OF THE KOREAN CHEMICAL SOCIETY, vol. 33, no. 1, 20 January 2012 (2012-01-20), pages 297 - 300, XP055171516 * |
See also references of EP2835371A4 * |
Also Published As
Publication number | Publication date |
---|---|
EP2835371A4 (en) | 2015-11-04 |
EP2835371B1 (en) | 2016-10-26 |
CN104245692A (zh) | 2014-12-24 |
CN104245692B (zh) | 2016-08-24 |
EP2835371A1 (en) | 2015-02-11 |
CA2867936A1 (en) | 2013-10-10 |
US20150158852A1 (en) | 2015-06-11 |
CA2867936C (en) | 2016-04-12 |
KR101201203B1 (ko) | 2012-11-15 |
US9303022B2 (en) | 2016-04-05 |
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