WO2011090122A1 - 2-アミノ-4-トリフルオロメチルピリジン類の製造方法 - Google Patents
2-アミノ-4-トリフルオロメチルピリジン類の製造方法 Download PDFInfo
- Publication number
- WO2011090122A1 WO2011090122A1 PCT/JP2011/050996 JP2011050996W WO2011090122A1 WO 2011090122 A1 WO2011090122 A1 WO 2011090122A1 JP 2011050996 W JP2011050996 W JP 2011050996W WO 2011090122 A1 WO2011090122 A1 WO 2011090122A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- formula
- amino
- producing
- reaction
- ammonia
- Prior art date
Links
- 0 *C(N=C(C1)N)=C[C@@]1C(F)(F)F Chemical compound *C(N=C(C1)N)=C[C@@]1C(F)(F)F 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
- C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
- C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen 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
- C07D213/72—Nitrogen atoms
- C07D213/73—Unsubstituted amino or imino radicals
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
- A61K31/44—Non condensed pyridines; Hydrogenated derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
- C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
- C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen 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
- C07D213/62—Oxygen or sulfur atoms
- C07D213/63—One oxygen atom
- C07D213/64—One oxygen atom attached in position 2 or 6
- C07D213/643—2-Phenoxypyridines; Derivatives thereof
Definitions
- the present invention relates to a method for producing 2-amino-4-trifluoromethylpyridines useful as an intermediate for pharmaceuticals or agricultural chemicals.
- 2-amino-4-trifluoromethylpyridines for example, 2,6-dichloro-4-trifluoromethylpyridine and ammonia are reacted to give 2-amino-6-chloro-4-trifluoromethyl.
- a method for producing pyridine is known (Patent Document 1).
- a method of producing 2-amino-4-trifluoromethylpyridine by reacting 2-chloro-4-trifluoromethylpyridine with ammonia Patent Document 2, Non-Patent Document 1).
- the conventional method is not sufficiently reactive and has a problem in terms of industrial production such as requiring a long reaction time and a high ratio of by-products.
- the present invention relates to a method for producing a compound of formula (I) or a salt thereof, which comprises reacting a compound of formula (II) with ammonia in the presence of a hydrophilic ether, and further a formula ( The present invention relates to a process for producing 2-amino-4-trifluoromethylpyridine or a salt thereof, which comprises dehalogenating the compound of I).
- 2-amino-4-trifluoromethylpyridines can be produced under industrially advantageous conditions.
- the compound of the formula (I) can be produced by reacting the compound of the formula (II) with ammonia in the presence of a hydrophilic ether, as shown in the following reaction (A).
- X 1 and X 2 are as described above.
- Examples of the salt of the compound of formula (I) include acid addition salts.
- Examples of acid addition salts include acid addition salts such as hydrochloride and sulfate.
- the salt of the compound of the formula (I) can be produced according to a known salt forming reaction.
- X 1 and X 2 are preferably chlorine atoms.
- Examples of ammonia include ammonia water and ammonia gas. Ammonia can be used in an amount of preferably 3 to 15 times mol, more preferably 5 to 12 times mol, per mol of the compound of formula (II). However, depending on the reaction conditions, an amount outside this range can be used.
- the hydrophilic ether is not particularly limited as long as it is inert to the reaction.
- examples of the hydrophilic ether include cyclic ethers such as tetrahydrofuran, 2-methyltetrahydrofuran, 3-methyltetrahydrofuran and 1,4-dioxane; linear ethers such as 1,2-dimethoxyethane.
- cyclic ethers such as tetrahydrofuran, 2-methyltetrahydrofuran, 3-methyltetrahydrofuran and 1,4-dioxane
- linear ethers such as 1,2-dimethoxyethane.
- tetrahydrofuran, 2-methyltetrahydrofuran, 3-methyltetrahydrofuran, 1,2-dimethoxyethane and the like are preferable.
- the hydrophilic ether can be used in an amount of preferably 1 to 10 times volume (V / W), more preferably 1 to 5 times (V / W) based on the weight of the compound of formula (II). However, depending on the reaction conditions, an amount outside this range can be used.
- This reaction can also be performed in the presence of a solvent.
- the solvent is not particularly limited as long as it is inert to the reaction.
- the solvent include aliphatic hydrocarbons such as pentane, hexane, heptane, octane and cyclohexane; aromatic hydrocarbons such as benzene, toluene and xylene; diethyl ether, butyl ethyl ether, methyl tert-butyl ether Ethers such as; polar aprotic solvents such as acetonitrile, propionitrile, N, N-dimethylformamide, dimethyl sulfoxide, hexamethylphosphoric triamide, sulfolane, N, N-dimethylacetamide, N-methylpyrrolidone; Examples thereof include esters such as methyl acetate, ethyl acetate and propyl acetate; alcohols such as methanol, ethanol,
- the reaction temperature is preferably about 100 to 200 ° C., more preferably about 130 to 160 ° C., and the reaction time is preferably about 2 to 24 hours, more preferably about 4 to 7 hours.
- 2-Amino-4-trifluoromethylpyridine is produced by reacting a compound of formula (II) with ammonia in the presence of a hydrophilic ether as shown in reaction (B) below.
- the resulting compound of formula (I) can then be prepared by dehalogenation.
- X 1 and X 2 have the same meanings as X 1 and X 2 in the reaction (A).
- the dehalogenation reaction can be carried out without isolating or purifying the compound of formula (I).
- the salt of 2-amino-4-trifluoromethylpyridine include acid addition salts.
- the acid addition salt include hydrochloride, sulfate and the like.
- a salt of 2-amino-4-trifluoromethylpyridine can be produced according to a known salt formation reaction.
- X 1 and X 2 are preferably chlorine atoms.
- the reaction of the compound of formula (II) and ammonia can be carried out in the same manner as the above-mentioned reaction (A).
- ammonia can also serve as a base in the dehalogenation step
- the amount used may be increased as necessary.
- the amount can be preferably 3 to 20 times mol, more preferably 5 to 15 times mol, per mol of the compound of formula (II). However, depending on the reaction conditions, an amount outside this range can be used.
- Dehalogenation can be performed, for example, by catalytic reduction.
- the catalytic reduction can be usually performed by reacting a target compound with a hydrogen source in the presence of a catalyst and a solvent.
- the hydrogen source include hydrogen, ammonium formate, formic acid, triethylammonium formate, sodium hypophosphite, and a mixture of two or more appropriately selected from these. Of these, hydrogen is preferred as the hydrogen source.
- the catalyst include platinum, platinum oxide, platinum black, Raney nickel, palladium, palladium-carbon, rhodium, rhodium-alumina, ruthenium, iron, copper and the like. Of these, palladium-carbon is preferred as the catalyst.
- the catalyst mentioned above may be used independently, or may mix 2 or more types.
- the hydrogen source is preferably used in an amount of 1 to 10 times mol, more preferably 1 to 5 times mol for 1 mol of the compound of formula (I).
- the catalyst can be used in an amount of preferably 0.01 to 1 mol%, more preferably 0.05 to 0.5 mol%, relative to 1 mol of the compound of the formula (I). However, depending on the reaction conditions, amounts outside these ranges can also be used.
- the hydrogen source or catalyst may be used in the same proportion as described above with respect to 1 mol of the compound of formula (II). Good.
- a solvent usually used for catalytic reduction can be used.
- a solvent the same thing as the previous process is mentioned, for example.
- the solvent used in the reaction of the compound of formula (II) with ammonia can be used as it is.
- Dehalogenation is usually performed in the presence of a base.
- the base include ammonia; alkali metal hydroxides such as sodium hydroxide and potassium hydroxide; alkali metal carbonates such as sodium carbonate and potassium carbonate; alkali metal bicarbonates such as sodium bicarbonate and potassium bicarbonate.
- the base is preferably used in an amount of 1 to 2 equivalents, more preferably 1 to 1.5 equivalents, relative to 1 mol of the compound of the formula (I). However, depending on the reaction conditions, amounts outside these ranges can also be used.
- the base When dehalogenation is performed without isolating or purifying the compound of formula (I), the base may be used in the same proportion as described above with respect to 1 mol of the compound of formula (II).
- the reaction temperature for dehalogenation is preferably about 20 to 150 ° C., more preferably about 60 to 130 ° C., and the reaction time is preferably about 0.5 to 10 hours, more preferably about 1 to 5 hours. is there.
- hydrophilic ether is at least one selected from the group consisting of tetrahydrofuran and 1,2-dimethoxyethane.
- Example 1 5 g of 2,6,4-DCTF (0.023 mol), 15.3 mL of 28% aqueous ammonia (0.22 mol) and 10 mL of THF were heated to 150 ° C. with stirring in a pressure reaction vessel (100 mL). Reacted. After about 5 hours, the pressure reaction vessel was cooled to 30-40 ° C. Water was added to the reaction solution, followed by extraction three times with ethyl acetate, and the organic layer was washed with saturated brine and dried over sodium sulfate. The organic layer was concentrated under reduced pressure to obtain 2,6,4-ACTF.
- Example 1 the reaction solution was analyzed by high performance liquid chromatography (HPLC).
- HPLC high performance liquid chromatography Table 1 shows the HPLC-PA% of 2,6,4-DCTF as a raw material compound, 2,6,4-ACTF as a target product and 2,6,4-DATF as a by-product.
- Example 2 5 g of 2,6,4-DCTF (0.023 mol), 15.4 mL of 28% aqueous ammonia (0.22 mol) and 15 mL of THF were heated to 150 ° C. with stirring in a pressure reaction vessel (100 mL). Reacted. After about 5 hours, the pressure reaction vessel was cooled to 30-40 ° C. Thereto, 150 mg of 5% Pd / C (54% wet, 0.038 mmol) was added, hydrogen was charged to 2.0 MPa, and the mixture was reacted by heating to 100 ° C. with stirring. After about 3 hours, the pressure reaction vessel was cooled to 30-40 ° C. and filtered using Celite.
- Example 3 The reaction was conducted in the same manner as in Example 2 except that 15.3 mL (0.22 mol) of 28% aqueous ammonia was used and 10 mL of THF was used to obtain 3.03 g of 2,4-ATF as white crystals (crude yield) : 80.7%).
- Example 4 The reaction was conducted in the same manner as in Example 3 except that THF was changed to DME to obtain 3.34 g of 2,4-ATF as white crystals (crude yield: 89.0%).
- Comparative Example 2 5 g of 2,6,4-DCTF (0.023 mol) and 15.3 mL of 28% aqueous ammonia (0.22 mol) were heated to 150 ° C. with stirring in a pressure reaction vessel (100 mL). After about 15 hours, the pressure reactor was cooled to 30-40 ° C. Thereto, 150 mg of 5% Pd / C (54% wet, 0.038 mmol) was added, hydrogen was charged to 1.8 MPa, and the mixture was reacted by heating to 100 ° C. with stirring. After about 3 hours, the pressure reaction vessel was cooled to 30-40 ° C. and filtered through Celite. Water was added to the filtrate, and the mixture was extracted 3 times with ethyl acetate.
- Example 5 10 g of 2,6,4-DCTF (0.046 mol), 30.6 mL of 28% aqueous ammonia (0.44 mol) and 20 mL of THF were heated to 150 ° C. with stirring in a pressure reaction vessel (200 mL). Reacted. After about 6 hours, the pressure reactor was cooled to 30-40 ° C. Thereto, 300 mg of 5% Pd / C (54% wet, 0.076 mmol) was added, hydrogen was charged to 2.0 MPa, and the mixture was reacted by heating to 100 ° C. with stirring. After about 3 hours, the pressure reaction vessel was cooled to 30-40 ° C. and filtered using Celite.
- Example 5 the white crystals obtained were analyzed by high performance liquid chromatography (HPLC).
- HPLC high performance liquid chromatography
- the intermediate product 2,6,4-ACTF, the target 2,4-ATF and the by-product 2,6,4-DATF were HPLC-PA%, and the yield of 2,4-ATF was Each is listed in Table 3.
- Example 6 Hydrogen chloride gas was gradually bubbled into a mixture of 6 g of 2,4-ATF and 80 mL of dry toluene at 10-20 ° C. with stirring. After stirring for 30 minutes at room temperature, filtration was performed, and the crystals were washed with dry toluene three times. The obtained crystals were dried under reduced pressure to obtain 7.1 g of 2,4-ATF hydrochloride as white crystals (yield: 96.6%; melting point: 218 ° C.). Moreover, the NMR spectrum data of the obtained crystal are as follows.
- Example 7 10 g of 2,6,4-DCTF (0.046 mol), 30.6 mL of 28% aqueous ammonia (0.44 mol) and 20 mL of 2-Me-THF were stirred in a pressure reaction vessel (200 mL) under stirring. The reaction was conducted by heating to 0 ° C. After about 6 hours, the pressure reactor was cooled to 30-40 ° C. Thereto, 300 mg of 5% Pd / C (54% wet, 0.076 mmol) was added, hydrogen was charged to 1.6 MPa, and the mixture was reacted by heating to 100 ° C. with stirring. After about 3 hours, the pressure reaction vessel was cooled to 30-40 ° C. and filtered using Celite.
- 2-amino-4-trifluoromethylpyridines can be produced under industrially advantageous conditions.
Abstract
Description
しかしながら、従来の方法では反応性が十分ではなく、長時間の反応を要したり、副生物の割合が高いなど、工業的製造の面で問題を抱えていた。
即ち本発明は、式(II)の化合物とアンモニアとを親水性エーテルの存在下で反応させることを特徴とする式(I)の化合物又はその塩の製造方法、さらにその方法で製造した式(I)の化合物を脱ハロゲン化することを特徴とする2-アミノ-4-トリフルオロメチルピリジン又はその塩の製造方法に関する。
式(I)の化合物の塩としては、例えば、酸付加塩などが挙げられる。酸付加塩としては、例えば塩酸塩や硫酸塩のような酸付加塩などが挙げられる。式(I)の化合物の塩は、公知の塩形成反応に従い製造することができる。
X1及びX2としては、塩素原子が好ましい。
アンモニアとしては、例えば、アンモニア水やアンモニアガスなどが挙げられる。
アンモニアは、式(II)の化合物1モルに対して、好ましくは3~15倍モル、より好ましくは5~12倍モル使用することができる。但し、反応条件によっては、この範囲外の量を使用することもできる。
上記反応において、式(I)の化合物を単離または精製することなく脱ハロゲン化反応を行うことができる。
また、2-アミノ-4-トリフルオロメチルピリジンの塩としては、例えば酸付加塩などが挙げられる。酸付加塩としては、例えば、塩酸塩、硫酸塩などが挙げられる。2-アミノ-4-トリフルオロメチルピリジンの塩は、公知の塩形成反応に従い製造することができる。
X1及びX2としては、塩素原子が好ましい。
式(II)の化合物とアンモニアとの反応は、前述の反応(A)と同様に行うことができる。但し、アンモニアは脱ハロゲン化工程での塩基を兼ねることができるため、必要に応じその使用量を増やしてもよい。アンモニアの使用量を増やす場合、その量は式(II)の化合物1モルに対して、好ましくは3~20倍モル、より好ましくは5~15倍モルとすることができる。但し、反応条件によっては、この範囲外の量を使用することもできる。
脱ハロゲン化の反応温度は、好ましくは20~150℃程度、より好ましくは60~130℃程度であり、反応時間は、好ましくは0.5~10時間程度、より好ましくは1~5時間程度である。
(1)2,6-ジクロロ-4-トリフルオロメチルピリジンとアンモニアとを親水性エーテルの存在下で反応させることを特徴とする、2-アミノ-6-クロロ-4-トリフルオロメチルピリジン又はその塩の製造方法。
(2)2,6-ジクロロ-4-トリフルオロメチルピリジンとアンモニアとを親水性エーテルの存在下で反応させて2-アミノ-6-クロロ-4-トリフルオロメチルピリジンを製造し、次いで得られた2-アミノ-6-クロロ-4-トリフルオロメチルピリジンを脱ハロゲン化することを特徴とする、2-アミノ-4-トリフルオロメチルピリジン又はその塩の製造方法。
(3)親水性エーテルが、テトラヒドロフラン、2-メチルテトラヒドロフラン、3-メチルテトラヒドロフラン及び1,2-ジメトキシエタンからなる群より選ばれる少なくとも1種である前記(1)又は(2)の方法。
(4)親水性エーテルが、テトラヒドロフラン及び1,2-ジメトキシエタンからなる群より選ばれる少なくとも1種である前記(1)又は(2)の方法。
(5)2,6-ジクロロ-4-トリフルオロメチルピリジンに対し、親水性エーテルを1~10倍量(V/W)使用する前記(1)又は(2)の方法。
2,6,4-DCTF:2,6-ジクロロ-4-トリフルオロメチルピリジン
2,6,4-ACTF:2-アミノ-6-クロロ-4-トリフルオロメチルピリジン
2,6,4-DATF:2,6-ジアミノ-4-トリフルオロメチルピリジン
2,4-ATF :2-アミノ-4-トリフルオロメチルピリジン
THF :テトラヒドロフラン
2-Me-THF :2-メチルテトラヒドロフラン
DME :1,2-ジメトキシエタン
Pd/C :パラジウム-炭素
各表中のHPLC-PA%は、高速液体クロマトグラフィー(HPLC)で分析したピーク面積率(Peak area%)を表す。測定条件は以下の通りである。
カラム:Waters 5C18-AR φ4.6mm×150mm
移動相:メタノール/水=4/1、0.5%酢酸
カラム温度:40℃
流速:1mL/分
検出:254nm
5gの2,6,4-DCTF(0.023mol)、15.3mLの28%アンモニア水(0.22mol)および10mLのTHFを、圧力反応容器(100mL)中、攪拌下で150℃まで加熱し反応させた。約5時間後、圧力反応容器を30~40℃まで冷却した。反応溶液に水を加え、酢酸エチルで3回抽出し、有機層を飽和食塩水で洗浄後、硫酸ナトリウムで乾燥した。有機層を減圧濃縮して2,6,4-ACTFを得た。
THFを用いない以外は、実施例1と同様に反応を行い、2,6,4-ACTFを得た。
5gの2,6,4-DCTF(0.023mol)、15.4mLの28%アンモニア水(0.22mol)および15mLのTHFを、圧力反応容器(100mL)中、攪拌下で150℃まで加熱し反応させた。約5時間後、圧力反応容器を30~40℃まで冷却した。そこへ、150mgの5%Pd/C(54%wet、0.038mmol)を加え、水素を2.0MPaまで充填した後、攪拌下で100℃まで加熱し反応させた。約3時間後、圧力反応容器を30~40℃まで冷却し、セライトを用いてろ過した。ろ液に水を加え、酢酸エチルで3回抽出し、有機層を飽和食塩水で洗浄後、硫酸ナトリウムで乾燥した。有機層を減圧濃縮し、n-ヘキサンを投入した後減圧濃縮した。析出した結晶を減圧下で乾燥し、3gの2,4-ATFを白色結晶として得た(粗収率:79.9%)。。
28%アンモニア水を15.3mL(0.22mol)用い、THFを10mL用いる以外は実施例2と同様に反応を行い、3.03gの2,4-ATFを白色結晶として得た(粗収率:80.7%)。
THFをDMEに変える以外は実施例3と同様に反応を行い、3.34gの2,4-ATFを白色結晶として得た(粗収率:89.0%)。
5gの2,6,4-DCTF(0.023mol)および15.3mLの28%アンモニア水(0.22mol)を、圧力反応容器(100mL)中、攪拌下で150℃まで加熱し反応させた。約15時間後、圧力反応容器を30~40℃まで冷却した。そこへ、150mgの5%Pd/C(54%wet、0.038mmol)加え、水素を1.8MPaまで充填した後、攪拌下で100℃まで加熱し反応させた。約3時間後、圧力反応容器を30~40℃まで冷却し、セライトろ過した。ろ液に水を加え、酢酸エチルで3回抽出し、有機層を飽和食塩水で洗浄後、硫酸ナトリウムで乾燥した。有機層を減圧濃縮し、n-ヘキサンを投入した後減圧濃縮した。析出した結晶を減圧下で乾燥し、3gの2,4-ATFを淡黄土色結晶として得た(粗収率:79.9%)。
10gの2,6,4-DCTF(0.046mol)、30.6mLの28%アンモニア水(0.44mol)および20mLのTHFを、圧力反応容器(200mL)中、攪拌下で150℃まで加熱し反応させた。約6時間後、圧力反応容器を30~40℃まで冷却した。そこへ、300mgの5%Pd/C(54%wet、0.076mmol)を加え、水素を2.0MPaまで充填した後、攪拌下で100℃まで加熱し反応させた。約3時間後、圧力反応容器を30~40℃まで冷却し、セライトを用いてろ過した。ろ液に水を加え、酢酸エチルで3回抽出し、有機層を飽和食塩水で洗浄後、硫酸ナトリウムで乾燥した。有機層を減圧濃縮し、n-ヘキサンを投入した後濃縮した。析出した結晶にn-ヘキサンを加え、氷冷下で約60分間攪拌し、析出した結晶をろ過した。得られた結晶を氷冷n-ヘキサンで3回掛け洗浄し、減圧下で乾燥して、5.4gの2,4-ATFを白色結晶として得た(収率:71.9%;融点:70.1℃)。また、得られた結晶のNMRスペクトルデータは以下の通りである。
1H-NMR(CDCl3):δ4.713(brs,2H),6.684(s,1H),6.823(dd,J=5.2 and 1.2Hz,1H),8.205(d, J=5.6Hz,1H)
6gの2,4-ATFおよび80mLの乾燥トルエンの混合物に、攪拌下10~20℃で塩化水素ガスを徐々に吹き込んだ。室温で30分間攪拌した後ろ過を行い、結晶を乾燥トルエンで3回掛け洗浄した。得られた結晶を減圧乾燥し、7.1gの2,4-ATF塩酸塩を白色結晶として得た(収率:96.6%;融点:218℃)。また、得られた結晶のNMRスペクトルデータは以下の通りである。
1H-NMR(D2O):δ4.650(brs,2H),6.957(dd,J=6.8 and 2.0Hz,1H),7.209(d,J=0.8Hz,1H),7.838(d,J=6.4Hz,1H)
10gの2,6,4-DCTF(0.046mol)、30.6mLの28%アンモニア水(0.44mol)および20mLの2-Me-THFを、圧力反応容器(200mL)中、攪拌下で150℃まで加熱し反応させた。約6時間後、圧力反応容器を30~40℃まで冷却した。そこへ、300mgの5%Pd/C(54%wet、0.076mmol)を加え、水素を1.6MPaまで充填した後、攪拌下で100℃まで加熱し反応させた。約3時間後、圧力反応容器を30~40℃まで冷却し、セライトを用いてろ過した。ろ液に水を加え、分離した有機層のみを回収した。水層は酢酸エチルで1回抽出し、有機層を回収した。回収した有機層を混和し、飽和食塩水で洗浄後、硫酸ナトリウムで乾燥した。有機層を減圧濃縮し、n-ヘキサンを投入した後濃縮した。析出した結晶にn-ヘキサンを加え、氷冷下で約30分間攪拌し、析出した結晶をろ過した。得られた結晶を氷冷n-ヘキサンで3回掛け洗浄し、減圧下で乾燥して、5.36gの2,4-ATFを白色結晶として得た(収率:71.4%)。
なお、本出願は、2010年1月21日付で出願された日本特許出願(特願2010-010890)に基づいており、その全体が引用により援用される。
また、ここに引用されるすべての参照は全体として取り込まれる。
Claims (6)
- 親水性エーテルが、テトラヒドロフラン、2-メチルテトラヒドロフラン、3-メチルテトラヒドロフラン及び1,2-ジメトキシエタンからなる群より選ばれる少なくとも1種である請求項1又は2の方法。
- 式(II)の化合物に対し、親水性エーテルを1~10倍量(V/W)使用する請求項1又は2の方法。
- X1及びX2が塩素原子である請求項1又は2の方法。
- 2-アミノ-4-トリフルオロメチルピリジンの酸付加塩。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201180006777.3A CN102712593B (zh) | 2010-01-21 | 2011-01-20 | 2-氨基-4-三氟甲基吡啶的生产方法 |
EP11734728.6A EP2527327A4 (en) | 2010-01-21 | 2011-01-20 | PROCESS FOR PREPARING 2-AMINO-4- (TRIFLUOROMETHYL) PYRIDINE |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010-010890 | 2010-01-21 | ||
JP2010010890 | 2010-01-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011090122A1 true WO2011090122A1 (ja) | 2011-07-28 |
Family
ID=44306922
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2011/050996 WO2011090122A1 (ja) | 2010-01-21 | 2011-01-20 | 2-アミノ-4-トリフルオロメチルピリジン類の製造方法 |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2527327A4 (ja) |
JP (1) | JP5689321B2 (ja) |
KR (1) | KR101653025B1 (ja) |
CN (1) | CN102712593B (ja) |
WO (1) | WO2011090122A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015000715A1 (en) | 2013-07-02 | 2015-01-08 | Syngenta Participations Ag | Pesticidally active bi- or tricyclic heterocycles with sulfur containing substituents |
WO2020250183A1 (en) | 2019-06-13 | 2020-12-17 | Pi Industries Ltd. | Fused heterocyclic compounds and their use as pest control agents |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111574439A (zh) * | 2020-05-13 | 2020-08-25 | 山东汇盟生物科技有限公司 | 一种制备2-氨基-3氯-5-三氟甲基吡啶的方法 |
CN114790168B (zh) * | 2021-05-18 | 2024-02-09 | 上海素馨化工科技有限公司 | 一种2-氨基-4-三氟甲基吡啶的制备方法及2-氨基-4-三氟甲基吡啶 |
CN115385852A (zh) * | 2022-09-05 | 2022-11-25 | 湖南阿斯迪康药业有限公司 | 一种2-氨基-4-三氟甲基吡啶的高效合成方法 |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3787420A (en) * | 1969-03-17 | 1974-01-22 | Dow Chemical Co | Cyanoalkoxy(trifluoromethyl)pyridines |
US3820973A (en) * | 1973-06-12 | 1974-06-28 | Dow Chemical Co | Method and composition for the stimulation of plant growth |
JPS62155260A (ja) * | 1985-12-27 | 1987-07-10 | Ishihara Sangyo Kaisha Ltd | N−ベンゾイル−n’−ピリジルウレア系化合物及びそれらを含有する殺虫剤 |
EP0228846A1 (en) | 1985-12-27 | 1987-07-15 | Ishihara Sangyo Kaisha, Ltd. | Amino-trifluoromethylpyridine compound and process for preparing the same |
JPS6348268A (ja) | 1986-08-14 | 1988-02-29 | Ishihara Sangyo Kaisha Ltd | N−ピリジル−n’−ベンゾイルウレア系化合物及びそれらを含有する殺虫剤 |
JP2002201179A (ja) * | 2000-12-28 | 2002-07-16 | Ishihara Sangyo Kaisha Ltd | 6−ハロアルキルニコチン酸類の製造方法 |
EP2030971A1 (en) * | 2006-06-20 | 2009-03-04 | Ishihara Sangyo Kaisha, Ltd. | Pest control agent containing novel pyridyl-methanamine derivative or salt thereof |
WO2009027283A1 (en) * | 2007-08-31 | 2009-03-05 | Merck Serono S.A. | Triazolopyridine compounds and their use as ask inhibitors |
WO2009068468A2 (en) * | 2007-11-30 | 2009-06-04 | F. Hoffmann-La Roche Ag | Pyridine compounds |
JP2010010890A (ja) | 2008-06-25 | 2010-01-14 | Casio Comput Co Ltd | 撮像装置、画像格納制御方法、及び、プログラム |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5292541A (en) * | 1989-05-26 | 1994-03-08 | Red Arrow Products Company Inc. | Browning materials derived from the pyrolysis of sugars and starches |
JP2008024697A (ja) * | 2006-06-20 | 2008-02-07 | Ishihara Sangyo Kaisha Ltd | 新規なピリジル−メタナミン誘導体又はその塩を含有する有害生物防除剤 |
US8513270B2 (en) * | 2006-12-22 | 2013-08-20 | Incyte Corporation | Substituted heterocycles as Janus kinase inhibitors |
ATE501136T1 (de) * | 2007-08-03 | 2011-03-15 | Pfizer Ltd | Imidazopyridinone |
EP2226315A4 (en) * | 2007-12-28 | 2012-01-25 | Carna Biosciences Inc | 2-AMINOQUINAZOLINE DERIVATIVE |
JP5498202B2 (ja) | 2009-03-03 | 2014-05-21 | 富士フイルム株式会社 | バリア性積層体、ガスバリアフィルムおよびこれらを用いたデバイス |
-
2011
- 2011-01-12 JP JP2011003595A patent/JP5689321B2/ja active Active
- 2011-01-20 KR KR1020127018863A patent/KR101653025B1/ko active IP Right Grant
- 2011-01-20 WO PCT/JP2011/050996 patent/WO2011090122A1/ja active Application Filing
- 2011-01-20 EP EP11734728.6A patent/EP2527327A4/en not_active Withdrawn
- 2011-01-20 CN CN201180006777.3A patent/CN102712593B/zh not_active Expired - Fee Related
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3787420A (en) * | 1969-03-17 | 1974-01-22 | Dow Chemical Co | Cyanoalkoxy(trifluoromethyl)pyridines |
US3820973A (en) * | 1973-06-12 | 1974-06-28 | Dow Chemical Co | Method and composition for the stimulation of plant growth |
JPS62155260A (ja) * | 1985-12-27 | 1987-07-10 | Ishihara Sangyo Kaisha Ltd | N−ベンゾイル−n’−ピリジルウレア系化合物及びそれらを含有する殺虫剤 |
EP0228846A1 (en) | 1985-12-27 | 1987-07-15 | Ishihara Sangyo Kaisha, Ltd. | Amino-trifluoromethylpyridine compound and process for preparing the same |
JPS6348268A (ja) | 1986-08-14 | 1988-02-29 | Ishihara Sangyo Kaisha Ltd | N−ピリジル−n’−ベンゾイルウレア系化合物及びそれらを含有する殺虫剤 |
JP2002201179A (ja) * | 2000-12-28 | 2002-07-16 | Ishihara Sangyo Kaisha Ltd | 6−ハロアルキルニコチン酸類の製造方法 |
EP2030971A1 (en) * | 2006-06-20 | 2009-03-04 | Ishihara Sangyo Kaisha, Ltd. | Pest control agent containing novel pyridyl-methanamine derivative or salt thereof |
WO2009027283A1 (en) * | 2007-08-31 | 2009-03-05 | Merck Serono S.A. | Triazolopyridine compounds and their use as ask inhibitors |
WO2009068468A2 (en) * | 2007-11-30 | 2009-06-04 | F. Hoffmann-La Roche Ag | Pyridine compounds |
JP2010010890A (ja) | 2008-06-25 | 2010-01-14 | Casio Comput Co Ltd | 撮像装置、画像格納制御方法、及び、プログラム |
Non-Patent Citations (2)
Title |
---|
JOURNAL OF FLUORINE CHEMISTRY, vol. 93, 1999, pages 153 - 157 |
See also references of EP2527327A4 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015000715A1 (en) | 2013-07-02 | 2015-01-08 | Syngenta Participations Ag | Pesticidally active bi- or tricyclic heterocycles with sulfur containing substituents |
EP3778598A2 (en) | 2013-07-02 | 2021-02-17 | Syngenta Participations Ag | Pesticidally active bi- or tricyclic heterocycles with sulfur containing substituents |
WO2020250183A1 (en) | 2019-06-13 | 2020-12-17 | Pi Industries Ltd. | Fused heterocyclic compounds and their use as pest control agents |
Also Published As
Publication number | Publication date |
---|---|
CN102712593A (zh) | 2012-10-03 |
JP5689321B2 (ja) | 2015-03-25 |
KR101653025B1 (ko) | 2016-08-31 |
JP2011168577A (ja) | 2011-09-01 |
EP2527327A4 (en) | 2013-08-21 |
EP2527327A1 (en) | 2012-11-28 |
CN102712593B (zh) | 2015-04-01 |
KR20120117831A (ko) | 2012-10-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5689321B2 (ja) | 2−アミノ−4−トリフルオロメチルピリジン類の製造方法 | |
WO2010122794A1 (ja) | ピラジンカルボン酸誘導体の製造方法及びその中間体 | |
WO2016161826A1 (zh) | 一种4-异丙氨基-1-丁醇的制备方法 | |
KR101471047B1 (ko) | 고순도 보센탄의 개선된 제조방법 | |
JP5507147B2 (ja) | ピリミジニルアルコール誘導体の製造方法及びその合成中間体 | |
WO2009110475A1 (ja) | 3-アミノ-2-クロロ-6-トリフルオロメチルピリジンの製造方法 | |
JP6669159B2 (ja) | ジアミン化合物及びその中間体の製造方法 | |
JP5009306B2 (ja) | 2−イソプロペニル−5−メチル−4−ヘキセン−1−イル3−メチル−2−ブテノアートの製造方法 | |
JP4032861B2 (ja) | β−オキソニトリル誘導体又はそのアルカリ金属塩の製法 | |
JP4968066B2 (ja) | 4−アミノ−2−アルキルチオ−5−ピリミジンカルバルデヒドの製法 | |
JP7453365B2 (ja) | 高純度のn-(5-メトキシ―2-フェノキシフェニル)メタンスルホンアミド及びその製造方法 | |
JP5205971B2 (ja) | テトラヒドロピラン化合物の製造方法 | |
JP2009143850A (ja) | ピラゾリノン誘導体の製造法 | |
JP4561197B2 (ja) | 5−(4−テトラヒドロピラニル)ヒダントインの製法及びその中間体 | |
TWI631104B (zh) | 2-胺基菸鹼酸苄酯衍生物之製造方法 | |
JPWO2008007763A1 (ja) | イミダゾリジン−2,4−ジオン化合物の製法及び固体状4,5−ジヒドロキシ−2−イミダゾリジノン化合物の取得方法 | |
WO2023214552A1 (ja) | トリフルオロメタンスルホニル化剤組成物、及び、トリフルオロメタンスルホニルオキシ化合物またはトリフルオロメタンスルホニル化合物の製造方法 | |
JP5034277B2 (ja) | 3−(n−アシルアミノ)−3−(4−テトラヒドロピラニル)−2−オキソプロパン酸エステル及び3−(n−アシルアミノ)−3−(4−テトラヒドロピラニル)−2−オキソプロパノヒドラジドの製造方法 | |
WO2013115381A1 (ja) | 対称性4,6-ビス(アリールオキシ)ピリミジン化合物の製造方法 | |
JP2000327629A (ja) | フェニル酢酸誘導体、ベンゾニトリル誘導体、およびその製造方法 | |
JP2008120759A (ja) | エーテル基を有するβ−ジケトン化合物の製造法 | |
JP2018070550A (ja) | 1,1−ジオキソ−ヘキサヒドロチオピラン−4−カルボン酸またはその誘導体の製造方法 | |
JP2008247835A (ja) | メトキシ基を有するβ−ジケトン化合物の製法 | |
JP2006321749A (ja) | 2−シアノマロンアルデヒドのアルカリ金属塩の製法 | |
JP2010053057A (ja) | N,n−ジメチルカルバミン酸アルキルの製造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201180006777.3 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11734728 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 20127018863 Country of ref document: KR Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2011734728 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 6481/CHENP/2012 Country of ref document: IN |
|
NENP | Non-entry into the national phase |
Ref country code: JP |