WO2011086955A1 - ピリミジニルピラゾール化合物の製造方法 - Google Patents
ピリミジニルピラゾール化合物の製造方法 Download PDFInfo
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- WO2011086955A1 WO2011086955A1 PCT/JP2011/050045 JP2011050045W WO2011086955A1 WO 2011086955 A1 WO2011086955 A1 WO 2011086955A1 JP 2011050045 W JP2011050045 W JP 2011050045W WO 2011086955 A1 WO2011086955 A1 WO 2011086955A1
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- JOXMEAWEWXBTOX-UHFFFAOYSA-N CC(C)Cc(cc1C)n[n]1-c1nc(C)cc(CC(C)C)n1 Chemical compound CC(C)Cc(cc1C)n[n]1-c1nc(C)cc(CC(C)C)n1 JOXMEAWEWXBTOX-UHFFFAOYSA-N 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D403/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00
- C07D403/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing two hetero rings
- C07D403/04—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing two hetero rings directly linked by a ring-member-to-ring-member bond
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- the present invention relates to a method for producing a pyrimidinyl pyrazole compound, and more particularly to a method capable of producing a pyrimidinyl pyrazole compound in one step in a solventless or aqueous solvent.
- a pyrimidinylpyrazole compound having a potassium channel modulating action (Patent Document 1), controlling activity against rice blast disease, rice sesame leaf blight, cucumber powdery mildew (Patent Documents 2 to 4), analgesic action (Patent Document 5), etc.
- Patent Document 1 a pyrimidinylpyrazole compound having a potassium channel modulating action
- Patent Documents 2 to 4 controlling activity against rice blast disease, rice sesame leaf blight, cucumber powdery mildew
- analgesic action (Patent Document 5), etc.
- Patent Document 6 a pyrimidinyl pyrazole compound having an excellent melanin production inhibitory effect and useful as a whitening agent has been reported (Patent Document 6).
- Patent Document 6 describes a method in which a hydrazinyl pyrimidine compound is cyclized with a ⁇ -diketone compound to form a pyrimidinyl pyrazole compound.
- the hydrazinyl pyrimidine compound necessary for obtaining the target pyrimidinyl pyrazole compound is not commercially available, or even if it is commercially available, it is very expensive, and therefore is inferior in economic efficiency.
- synthesizing the necessary hydrazinylpyrimidine compound one or two steps are required, and an organic solvent may have to be used as a reaction solvent.
- Non-Patent Document 1 discloses that a pyrimidinylpyrazoline skeleton is formed by reacting ⁇ -methoxyvinyltrifluoromethylketone compound with aminoguanidine bicarbonate in ethanol to form a pyrimidinylpyrazoline skeleton, followed by a dehydration reaction in dichloromethane.
- the method of converting to is described.
- this method uses an organic solvent as a reaction solvent, and the reaction consists of two steps, and an additional step is required for the synthesis of the raw material ⁇ -methoxyvinyl trifluoromethyl ketone compound.
- Non-Patent Document 2 describes a method in which a pyrazole ring is directly substituted and introduced into a leaving group of a pyrimidine compound in ethanol to form a pyrimidinyl pyrazole compound.
- a pyrimidinylpyrazole compound can be obtained from two kinds of raw materials in one step, there are problems such as the use of an organic solvent as a reaction solvent and the need for additional steps when the raw materials are very expensive to synthesize. There is.
- the present invention has been made in view of the background art described above, and an object of the present invention is to provide a method for producing a pyrimidylpyrazole compound excellent in environmental compatibility and economy.
- the production method according to the present invention comprises reacting aminoguanidine represented by the following general formula (2) or a salt thereof with a ⁇ -diketone compound represented by the following general formula (3). It is a manufacturing method of the pyrimidinyl pyrazole compound shown by General formula (1).
- R 1 and R 3 each independently represents an alkyl group having 1 to 4 carbon atoms, and R 2 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms.
- this invention provides the manufacturing method of the pyrimidinyl pyrazole compound characterized by performing reaction in the absence of a solvent in the said method. Moreover, this invention provides the manufacturing method of the pyrimidinyl pyrazole compound characterized by performing reaction in an aqueous solvent in the said method. Moreover, this invention provides the manufacturing method of the pyrimidinyl pyrazole compound characterized by performing reaction in water in the said method. In addition, the present invention provides a method for producing a pyrimidinyl pyrazole compound, characterized in that, in any of the methods described above, a ⁇ -diketone compound is used in a molar equivalent of 2 times or more with respect to aminoguanidine.
- the present invention provides a method for producing a pyrimidinylpyrazole compound, wherein the reaction is performed in the presence of a base in any one of the methods described above.
- the present invention also provides a method for producing a pyrimidinylpyrazole compound, characterized in that, in the above method, the base is selected from an alkali metal or alkaline earth metal hydroxide or carbonate, or acetate.
- a pyrimidinylpyrazole compound can be produced in one step from a commercially available relatively low molecular weight raw material, and in the absence of a solvent or in an aqueous solvent. Since the reaction can be performed, the environmental load is small and the economy is excellent.
- R 1 and R 3 are each independently an alkyl group having 1 to 4 carbon atoms, and preferably R 1 and R 3 are the same.
- R 2 is a hydrogen atom or an alkyl group having 1 to 4 carbon atoms.
- the alkyl group having 1 to 4 carbon atoms can be linear, branched or cyclic.
- methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, cyclopropyl, cyclobutyl and the like can be mentioned.
- An example of a pyrimidinyl pyrazole compound is a compound in which R 1 and R 3 are each a linear or branched alkyl group having 1 to 4 carbon atoms.
- An example of a pyrimidinyl pyrazole compound is a compound in which at least one of R 1 and R 3 is methyl.
- An example of a pyrimidinyl pyrazole compound is a compound in which R 2 is hydrogen, methyl, or ethyl.
- a salt of aminoguanidine may be used as long as there is no particular problem.
- the salt include salts of inorganic acids such as hydrochloric acid, carbonic acid, bicarbonate, hydrobromic acid, sulfuric acid, phosphoric acid, acetic acid, propionic acid, citric acid, lactic acid, oxalic acid, maleic acid, fumaric acid, succinic acid , And salts of organic acids such as tartaric acid and methanesulfonic acid, but hydrochlorides and bicarbonates are readily available as commercial products.
- Aminoguanidine or a salt thereof may be synthesized by a known method.
- R 1 to R 3 are determined according to the target pyrimidinyl pyrazole compound.
- ⁇ -diketone compound (3) is used in a molar equivalent of at least twice that of aminoguanidine or a salt thereof. Although there is no particular upper limit, it is preferably less than 5 times molar equivalent from the viewpoint of production cost. If there is too little ⁇ -diketone compound, the reaction becomes insufficient.
- This reaction can be carried out in the presence or absence of a solvent.
- the reaction solvent include hydrocarbon solvents such as toluene, xylene, benzene, hexane and cyclohexane; alcohol solvents such as methanol, ethanol and isopropyl alcohol; tetrahydrofuran; dimethylformamide; dimethyl sulfoxide; water;
- hydrocarbon solvents such as toluene, xylene, benzene, hexane and cyclohexane
- alcohol solvents such as methanol, ethanol and isopropyl alcohol
- tetrahydrofuran dimethylformamide
- dimethyl sulfoxide water
- water is particularly preferable.
- a reaction in the absence of a solvent or a reaction in water with a small environmental load is strongly desired from the viewpoint of environmental compatibility.
- the method of the present invention can sufficiently meet such a demand.
- the reaction temperature can be in the range of 0 to 200 ° C., but preferably in the range of room temperature to 120 ° C. Further, the reaction can be carried out under pressure, but usually it may be carried out under atmospheric pressure.
- This reaction can be performed in the presence of a base as necessary.
- a base may be combined.
- the base used in the reaction include alkali metal hydroxides such as sodium hydroxide, potassium hydroxide and lithium hydroxide; alkaline earth metal hydroxides such as barium hydroxide, calcium hydroxide and magnesium hydroxide; sodium Metal alkoxides such as methoxide, sodium ethoxide and potassium t-butoxide; tetraalkylammonium hydroxides such as tetrabutylammonium hydroxide and benzyltrimethylmethylammonium hydroxide; potassium carbonate, sodium carbonate, calcium carbonate, sodium bicarbonate, carbonic acid Metal carbonates such as potassium hydride; metal hydrides such as sodium hydride, potassium hydride and calcium hydride; metal acetates such as sodium acetate and potassium acetate; other metal organic acid salts; alkalis such as sodium, potassium and lithium Money ; Triethyl ethylamine
- the amount of the base can be, for example, 0 to 5 times molar equivalent to aminoguanidine or a salt thereof, but 0.2 times molar equivalent or more, preferably 0.5 to The molar equivalent is 2 times, more preferably 0.8 to 1.2 molar equivalents. Further, the reaction proceeds without using a base, but in that case, a high reaction temperature may be required.
- a desired pyrimidinyl pyrazole compound (1) can be manufactured using a suitable raw material.
- Example 1 Aminoguanidine hydrochloride (Tokyo Kasei, purity 98% or more) (1.11 g, 10 mmol) and acetylacetone (Tokyo Kasei, purity 99% or more) (2.00 g, 20 mmol) and 2N aqueous sodium hydroxide solution (5 ml) And stirred at 80 ° C. for 5 hours. A 1N aqueous sodium hydroxide solution was added to the reaction solution to adjust the pH to around 13, and the mixture was extracted with ethyl acetate. After drying over anhydrous sodium sulfate, drying under reduced pressure gave 2- (3,5-dimethylpyrazolo) -4,6-dimethylpyrimidine (1.16 g, 58%).
- Example 2 Acetylacetone (2.00 g, 20 mmol) and water (5 ml) were added to aminoguanidine bicarbonate (Tokyo Chemical Industry, purity 99% or more) (1.36 g, 10 mmol), and the mixture was stirred at 80 ° C. for 5 hours. A 1N aqueous sodium hydroxide solution was added to the reaction solution to adjust the pH to around 9, and the mixture was extracted with ethyl acetate. The extract was dried over anhydrous sodium sulfate and then dried under reduced pressure to obtain 2- (3,5-dimethylpyrazolo) -4,6-dimethylpyrimidine (1.14 g, 56%).
- aminoguanidine bicarbonate Tokyo Chemical Industry, purity 99% or more
- Example 3 Acetylacetone (11.0 g, 110 mmol) was added to aminoguanidine hydrochloride (5.53 g, 50 mmol), and the mixture was stirred at 120 ° C. for 10 hours in the absence of a solvent. A 10% aqueous sodium hydroxide solution was added to the reaction solution to adjust the pH to around 10, and the mixture was stirred at 0 ° C. for 1 hour. The precipitated crystals were collected by filtration, washed with water, and dried under reduced pressure to give 2- (3,5-dimethylpyrazolo) -4,6-dimethylpyrimidine (5.00 g, 50%).
- Example 4 Acetylacetone (11.0 g, 110 mmol), water (20 ml) and sodium hydroxide (2.00 g, 50 mmol) were added to aminoguanidine hydrochloride (5.53 g, 50 mmol), and the mixture was stirred at 80 ° C. for 5 hours. Water (10 ml) and 1N aqueous sodium hydroxide solution (1 ml) were added to the reaction mixture, and the mixture was stirred at 0 ° C. for 1 hr. The precipitated crystals were collected by filtration, washed with water, and dried under reduced pressure to give 2- (3,5-dimethylpyrazolo) -4,6-dimethylpyrimidine (4.41 g, 44%).
- Example 5 Water (20 ml) and acetylacetone (11.0 g, 110 mmol) were added to aminoguanidine bicarbonate (6.80 g, 50 mmol), and the mixture was stirred at 80 ° C. for 5 hours. Water (10 ml) and 1N aqueous sodium hydroxide solution (1 ml) were added to the reaction mixture, and the mixture was stirred at 0 ° C. for 1 hr. The precipitated crystals were collected by filtration, washed with water, and dried under reduced pressure to obtain 2- (3,5-dimethylpyrazolo) -4,6-dimethylpyrimidine (4.58 g, 45%).
- Example 6 Water (20 ml) and acetylacetone (22.59 g, 0.226 mol) were added to aminoguanidine bicarbonate (13.96 g, 0.103 mol), and the mixture was stirred at 80 ° C. for 9 hours. Water (60 ml) was added to the reaction solution and stirred at room temperature for 1 hour. The precipitated crystals were collected by filtration, washed with water, and dried under reduced pressure to give 2- (3,5-dimethylpyrazolo) -4,6-dimethylpyrimidine (11.69 g, 56%).
- Example 7 Water (20 ml), sodium hydroxide (4.15 g, 0.104 mol) and acetylacetone (22.91 g, 0.229 mol) were added to aminoguanidine hydrochloride (11.47 g, 0.104 mol) at 80 ° C. Stir for 9 hours. Water (60 ml) was added to the reaction solution and stirred at room temperature for 1 hour. The precipitated crystals were collected by filtration, washed with water, and dried under reduced pressure to give 2- (3,5-dimethylpyrazolo) -4,6-dimethylpyrimidine (10.68 g, 51%).
- Example 8 Aminoguanidine hydrochloride (1.76 g, 15.9 mmol), water (5 ml), sodium hydroxide (636 mg, 15.9 mmol) and 3-ethyl-2,4-pentanedione (manufactured by Tokyo Chemical Industry, purity 90.0%) (Above) (4.50 g, 35.0 mmol) was added and stirred at 80 ° C. for 8 hours. Water (30 ml) was added to the reaction solution and stirred at 0 ° C. for 1 hour.
- Example 9 Aminoguanidine hydrochloride (1.59 g, 14.4 mmol), water (5 ml), sodium hydroxide (576 mg, 14.4 mmol) and 6-methyl-2,4-heptanedione (manufactured by Tokyo Chemical Industry, purity 97.0%) (Above) (4.50 g, 31.6 mmol) was added, and the mixture was stirred at 80 ° C. for 8 hours. Water (30 ml) was added to the reaction mixture, and the mixture was extracted with ethyl acetate (10 ml). The extract was washed with saturated brine, dried over anhydrous sodium sulfate, and concentrated.
- Example 10 Water (20 ml), acetylacetone (11 g, 110 mmol) and sodium acetate (4.10 g, 50 mmol) were added to aminoguanidine hydrochloride (5.52 g, 50 mmol), and the mixture was stirred at 80 ° C. for 7 hours. Water (20 ml) was added to the reaction solution and stirred overnight at room temperature. The precipitated crystals were collected by filtration, washed with water, and dried under reduced pressure to give 2- (3,5-dimethylpyrazolo) -4,6-dimethylpyrimidine (8.90 g, 88%).
- Example 11 Water (20 ml), acetylacetone (11 g, 110 mmol) and sodium hydrogen carbonate (4.20 g, 50 mmol) were added to aminoguanidine hydrochloride (5.52 g, 50 mmol), and the mixture was stirred at 80 ° C. for 7 hours. Water (20 ml) was added to the reaction solution and stirred overnight at room temperature. The precipitated crystals were collected by filtration, washed with water, and dried under reduced pressure to give 2- (3,5-dimethylpyrazolo) -4,6-dimethylpyrimidine (6.07 g, 60%).
- Example 12 Water (20 ml), acetylacetone (11 g, 110 mmol) and potassium carbonate (6.91 g, 50 mmol) were added to aminoguanidine hydrochloride (5.52 g, 50 mmol), and the mixture was stirred at 80 ° C. for 7 hours. Water (20 ml) was added to the reaction solution and stirred overnight at room temperature. The precipitated crystals were collected by filtration, washed with water, and dried under reduced pressure to give 2- (3,5-dimethylpyrazolo) -4,6-dimethylpyrimidine (5.26 g, 52%).
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- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
Description
しかし、本方法では、目的とするピリミジニルピラゾール化合物を得るために必要なヒドラジニルピリミジン化合物が市販されていなかったり、市販されていたとしても非常に高価であるため、経済性に劣る。必要なヒドラジニルピリミジン化合物を合成する場合には1~2工程を要し、また、反応溶媒として有機溶媒を用いなければならないこともある。
しかし、本方法は反応溶媒として有機溶媒を用いており、また、反応が2工程からなり、原料のβ-メトキシビニルトリフルオロメチルケトン化合物の合成のためにさらなる工程が必要である。
本方法では2種の原料から1工程でピリミジニルピラゾール化合物が得られるものの、反応溶媒として有機溶媒を用いること、原料が非常に高価で合成する場合にはさらなる工程が必要となることなどの問題点がある。
すなわち、本発明にかかる製造方法は、下記一般式(2)で示されるアミノグアニジンまたはその塩と、下記一般式(3)で示されるβ-ジケトン化合物とを反応させることを特徴とする、下記一般式(1)で示されるピリミジニルピラゾール化合物の製造方法である。
また、本発明は、前記方法において、反応を水性溶媒中で行うことを特徴とするピリミジニルピラゾール化合物の製造方法を提供する。
また、本発明は、前記方法において、反応を水中で行うことを特徴とするピリミジニルピラゾール化合物の製造方法を提供する。
また、本発明は、前記何れかに記載の方法において、アミノグアニジンに対してβ-ジケトン化合物を2倍モル当量以上用いることを特徴とするピリミジニルピラゾール化合物の製造方法を提供する。
また、本発明は、前記何れかに記載の方法において、反応を塩基存在下で行うことを特徴とするピリミジニルピラゾール化合物の製造方法を提供する。
また、本発明は、前記方法において、塩基がアルカリ金属又はアルカリ土類金属の水酸化物又は炭酸塩、又は酢酸塩から選ばれることを特徴とするピリミジニルピラゾール化合物の製造方法を提供する。
R2は水素原子または炭素数1~4のアルキル基である。
本発明において炭素数1~4のアルキル基は直鎖状、分岐鎖状、又は環状であることができる。例えば、メチル、エチル、n-プロピル、イソプロピル、n-ブチル、sec-ブチル、イソブチル、tert-ブチル、シクロプロピル、シクロブチル等が挙げられる。
ピリミジニルピラゾール化合物の一例として、R1、R3がそれぞれ炭素数1~4の直鎖状又は分岐鎖状のアルキル基である化合物が挙げられる。
また、ピリミジニルピラゾール化合物の一例として、R1、R3の少なくとも一方がメチルである化合物が挙げられる。
また、ピリミジニルピラゾール化合物の一例として、R2が水素、メチル、又はエチルである化合物が挙げられる。
近年の合成反応においては、環境適合性の点から溶媒の非存在下での反応、もしくは環境負荷の小さい水中での反応が強く望まれている。本発明の方法はこのような要請に十分応えることができるものである。
アミノグアニジン塩酸塩(東京化成製、純度98%以上)(1.11g,10mmol)にアセチルアセトン(東京化成製、純度99%以上)(2.00g,20mmol)と2N水酸化ナトリウム水溶液(5ml)とを加え、80℃にて5時間撹拌した。反応液に1N水酸化ナトリウム水溶液を加えてpH13付近に調整し、酢酸エチルにて抽出した。無水硫酸ナトリウムで乾燥後、減圧乾燥して2-(3,5-ジメチルピラゾロ)-4,6-ジメチルピリミジン(1.16g,58%)を得た。
2.45 (6H, s), 2.53 (3H, s), 6.09 (1H, s), 7.17 (1H, s).
13C-NMR (DMSO-d6)δ: 13.20, 14.09, 23.26,
108.96, 117.14, 141.44, 148.84, 156.36, 168.03.
重炭酸アミノグアニジン(東京化成製、純度99%以上)(1.36g,10mmol)にアセチルアセトン(2.00g,20mmol)と水(5ml)とを加え、80℃にて5時間撹拌した。反応液に1N水酸化ナトリウム水溶液を加えてpH9付近に調整し、酢酸エチルにて抽出した。無水硫酸ナトリウムで乾燥後、減圧乾燥して2-(3,5-ジメチルピラゾロ)-4,6-ジメチルピリミジン(1.14g,56%)を得た。
アミノグアニジン塩酸塩(5.53g,50mmol)にアセチルアセトン(11.0g,110mmol)を加え、溶媒の非存在下、120℃にて10時間撹拌した。反応液に10%水酸化ナトリウム水溶液を加えてpH10付近に調整し、0℃にて1時間撹拌した。析出した結晶を濾取して水で洗浄し、減圧乾燥して2-(3,5-ジメチルピラゾロ)-4,6-ジメチルピリミジン(5.00g,50%)を得た。
アミノグアニジン塩酸塩(5.53g,50mmol)にアセチルアセトン(11.0g,110mmol)と水(20ml)および水酸化ナトリウム(2.00g,50mmol)とを加え、80℃にて5時間撹拌した。反応液に水(10ml)と1N水酸化ナトリウム水溶液(1ml)とを加えて、0℃にて1時間撹拌した。析出した結晶を濾取して水で洗浄し、減圧乾燥して2-(3,5-ジメチルピラゾロ)-4,6-ジメチルピリミジン(4.41g,44%)を得た。
重炭酸アミノグアニジン(6.80g,50mmol)に水(20ml)とアセチルアセトン(11.0g,110mmol)とを加え、80℃にて5時間撹拌した。反応液に水(10ml)と1N水酸化ナトリウム水溶液(1ml)とを加えて、0℃にて1時間撹拌した。析出した結晶を濾取して水で洗浄し、減圧乾燥して2-(3,5-ジメチルピラゾロ)-4,6-ジメチルピリミジン(4.58g,45%)を得た。
重炭酸アミノグアニジン(13.96g,0.103mol)に水(20ml)とアセチルアセトン(22.59g,0.226mol)とを加え、80℃にて9時間撹拌した。反応液に水(60ml)を加えて室温にて1時間撹拌した。析出した結晶を濾取して水で洗浄後、減圧乾燥して2-(3,5-ジメチルピラゾロ)-4,6-ジメチルピリミジン(11.69g,56%)を得た。
アミノグアニジン塩酸塩(11.47g,0.104mol)に水(20ml)と水酸化ナトリウム(4.15g,0.104mol)およびアセチルアセトン(22.91g,0.229mol)とを加え、80℃にて9時間撹拌した。反応液に水(60ml)を加えて室温にて1時間撹拌した。析出した結晶を濾取して水で洗浄後、減圧乾燥して2-(3,5-ジメチルピラゾロ)-4,6-ジメチルピリミジン(10.68g,51%)を得た。
アミノグアニジン塩酸塩(1.76g,15.9mmol)に水(5ml)と水酸化ナトリウム(636mg,15.9mmol)および3-エチル-2,4-ペンタンジオン(東京化成製、純度90.0%以上)(4.50g,35.0mmol)を加え、80℃にて8時間撹拌した。反応液に水(30ml)を加えて0℃にて1時間撹拌した。析出した結晶を濾取して水で洗浄後、減圧乾燥して5-エチル-2-(4-エチル-3,5-ジメチルピラゾール-1-イル)-4,6-ジメチルピリミジン(1.35g,33%)を得た。
J=7.7 Hz), 1.12 (3H, t, J=7.7 Hz), 2.18 (3H, s), 2.38 (2H, q, J=7.7 Hz), 2.45
(3H, s), 2.49 (6H, s), 2.66 (2H, q, J=7.7 Hz).
13C-NMR (DMSO-d6)δ: 11.50, 11.82, 12.42,
14.68, 15.80, 20.22, 21.12, 120.54, 129.32, 136.64, 147.53, 154.01, 165.39.
アミノグアニジン塩酸塩(1.59g,14.4mmol)に水(5ml)と水酸化ナトリウム(576mg,14.4mmol)および6-メチル-2,4-ヘプタンジオン(東京化成製、純度97.0%以上)(4.50g,31.6mmol)を加え、80℃にて8時間撹拌した。反応液に水(30ml)を加え、酢酸エチル(10ml)で抽出した。抽出液を飽和食塩水で洗浄、無水硫酸ナトリウムで乾燥後、濃縮した。得られた残渣(3.83g)をシリカゲルカラムクロマトグラフィー(シリカゲル80g、クロロホルム~クロロホルム:メタノール=100:1)に付し、4-イソブチル-2-(3-イソブチル-5-メチルピラゾール-1-イル)-6-メチルピリミジン(181mg,4%)および4-イソブチル-2-(5-イソブチル-3-メチルピラゾール-1-イル)-6-メチルピリミジン(2.05g,50%)を得た。
Hz), 0.93 (6H, d, J=6.8 Hz), 1.88 - 1.98 (1H, m), 2.12 - 2.22 (1H, m), 2.45
(2H, d, J=6.8 Hz), 2.49 (3H, s), 2.56 (3H, s), 2.60 (2H, d, J=6.8 Hz), 6.12
(1H, s), 7.16 (1H, s).
13C-NMR (DMSO-d6)δ: 14.19, 21.98, 22.21,
23.34, 27.48, 27.89, 36.85, 45.66, 108.41, 117.27, 141.20, 152.54, 156.53,
168.26, 170.49.
Hz), 0.93 (6H, d, J=6.8 Hz), 1.83 (1H, septet, J=6.8 Hz), 2.14 (1H, septet,
J=6.8 Hz), 2.22 (3H, s), 2.49 (3H, s), 2.60 (2H, d, J=6.8 Hz), 2.90 (2H, d,
J=6.8 Hz), 6.10 (1H, s), 7.17 (1H, s).
13C-NMR (DMSO-d6)δ: 13.19, 21.89, 21.99,
23.31, 27.44, 27.65, 35.83, 45.68, 108.90, 117.42, 144.76, 148.64, 156.55,
168.28, 170.57.
アミノグアニジン塩酸塩(5.52g,50mmol)に水(20ml)とアセチルアセトン(11g,110mmol)ならびに酢酸ナトリウム(4.10g、50mmol)を加え、80℃にて7時間撹拌した。反応液に水(20ml)を加えて室温にて一晩撹拌した。析出した結晶を濾取して水で洗浄後、減圧乾燥して2-(3,5-ジメチルピラゾロ)-4,6-ジメチルピリミジン(8.90g、88%)を得た。
アミノグアニジン塩酸塩(5.52g,50mmol)に水(20ml)とアセチルアセトン(11g,110mmol)ならびに炭酸水素ナトリウム(4.20g、50mmol)を加え、80℃にて7時間撹拌した。反応液に水(20ml)を加えて室温にて一晩撹拌した。析出した結晶を濾取して水で洗浄後、減圧乾燥して2-(3,5-ジメチルピラゾロ)-4,6-ジメチルピリミジン(6.07g、60%)を得た。
アミノグアニジン塩酸塩(5.52g,50mmol)に水(20ml)とアセチルアセトン(11g,110mmol)ならびに炭酸カリウム(6.91g、50mmol)を加え、80℃にて7時間撹拌した。反応液に水(20ml)を加えて室温にて一晩撹拌した。析出した結晶を濾取して水で洗浄後、減圧乾燥して2-(3,5-ジメチルピラゾロ)-4,6-ジメチルピリミジン(5.26g、52%)を得た。
Claims (7)
- 請求項1記載の方法において、反応を溶媒の非存在下で行うことを特徴とするピリミジニルピラゾール化合物の製造方法。
- 請求項1記載の方法において、反応を水性溶媒中で行うことを特徴とするピリミジニルピラゾール化合物の製造方法。
- 請求項3記載の方法において、反応を水中で行うことを特徴とするピリミジニルピラゾール化合物の製造方法。
- 請求項1~4の何れかに記載の方法において、アミノグアニジンに対してβ-ジケトン化合物を2倍モル当量以上用いることを特徴とするピリミジニルピラゾール化合物の製造方法。
- 請求項1~5の何れかに記載の方法において、反応を塩基存在下で行うことを特徴とするピリミジニルピラゾール化合物の製造方法。
- 請求項6記載の方法において、塩基がアルカリ金属又はアルカリ土類金属の水酸化物又は炭酸塩、又は酢酸塩から選ばれることを特徴とするピリミジニルピラゾール化合物の製造方法。
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ES11732825.2T ES2501765T3 (es) | 2010-01-18 | 2011-01-05 | Proceso para preparar compuestos de pirazol pirimidinilo |
US13/520,203 US8592582B2 (en) | 2010-01-18 | 2011-01-05 | Method for producing pyrimidinylpyrazole compounds |
CN2011800062765A CN102712627B (zh) | 2010-01-18 | 2011-01-05 | 嘧啶基吡唑化合物的制造方法 |
EP11732825.2A EP2527341B1 (en) | 2010-01-18 | 2011-01-05 | Process for preparation of pyrimidinylpyrazole compounds |
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HK1171020A1 (en) | 2013-03-15 |
KR20120094128A (ko) | 2012-08-23 |
TWI379830B (en) | 2012-12-21 |
EP2527341A1 (en) | 2012-11-28 |
US20120283441A1 (en) | 2012-11-08 |
JP4887454B2 (ja) | 2012-02-29 |
EP2527341B1 (en) | 2014-06-18 |
US8592582B2 (en) | 2013-11-26 |
EP2527341A4 (en) | 2013-08-21 |
TW201141850A (en) | 2011-12-01 |
KR101186021B1 (ko) | 2012-09-26 |
JP2011162540A (ja) | 2011-08-25 |
CN102712627A (zh) | 2012-10-03 |
CN102712627B (zh) | 2013-12-18 |
ES2501765T3 (es) | 2014-10-02 |
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