WO2014103811A1 - 精製されたアミン化合物の製造方法 - Google Patents
精製されたアミン化合物の製造方法 Download PDFInfo
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- WO2014103811A1 WO2014103811A1 PCT/JP2013/083806 JP2013083806W WO2014103811A1 WO 2014103811 A1 WO2014103811 A1 WO 2014103811A1 JP 2013083806 W JP2013083806 W JP 2013083806W WO 2014103811 A1 WO2014103811 A1 WO 2014103811A1
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- 0 *C(*)(C=C(*)c1c2)N(*)c1c(*)c(*)c2S Chemical compound *C(*)(C=C(*)c1c2)N(*)c1c(*)c(*)c2S 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D215/00—Heterocyclic compounds containing quinoline or hydrogenated quinoline ring systems
- C07D215/02—Heterocyclic compounds containing quinoline or hydrogenated quinoline ring systems having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen atoms or carbon atoms directly attached to the ring nitrogen atom
- C07D215/04—Heterocyclic compounds containing quinoline or hydrogenated quinoline ring systems having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen atoms or carbon atoms directly attached to the ring nitrogen atom with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, directly attached to the ring carbon atoms
- C07D215/06—Heterocyclic compounds containing quinoline or hydrogenated quinoline ring systems having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen atoms or carbon atoms directly attached to the ring nitrogen atom with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, directly attached to the ring carbon atoms having only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, attached to the ring nitrogen atom
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
- C07C209/82—Purification; Separation; Stabilisation; Use of additives
- C07C209/84—Purification
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C211/00—Compounds containing amino groups bound to a carbon skeleton
- C07C211/43—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton
- C07C211/57—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings being part of condensed ring systems of the carbon skeleton
- C07C211/60—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings being part of condensed ring systems of the carbon skeleton containing a ring other than a six-membered aromatic ring forming part of at least one of the condensed ring systems
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D215/00—Heterocyclic compounds containing quinoline or hydrogenated quinoline ring systems
- C07D215/02—Heterocyclic compounds containing quinoline or hydrogenated quinoline ring systems having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen atoms or carbon atoms directly attached to the ring nitrogen atom
- C07D215/04—Heterocyclic compounds containing quinoline or hydrogenated quinoline ring systems having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen atoms or carbon atoms directly attached to the ring nitrogen atom with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, directly attached to the ring carbon atoms
Definitions
- the present invention relates to a method for producing a purified amine compound.
- Patent Document 1 discloses the formula (1). (In the formula, R 1 , R 2 , R 3 , R 4 , R 5 , R 6 and R 7 each independently represents a hydrogen atom or a hydrocarbon group.) Is useful as an intermediate of an N-indanicarboxamide compound exhibiting bactericidal properties.
- a highly pure amine compound represented by the formula (1) can be produced.
- amine compound (1) The amine compound represented by formula (1) (hereinafter referred to as amine compound (1)) will be described.
- hydrocarbon group examples include a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a tert-butyl group, a pentyl group, a hexyl group, a nonyl group, a decyl group, and a 3,7-dimethyloctyl group.
- examples thereof include an alkyl group having 1 to 20 carbon atoms and a cycloalkyl group having 3 to 20 carbon atoms such as a cyclopentyl group, a cyclohexyl group, and a norbornyl group.
- an alkyl group having 1 to 6 carbon atoms and a cycloalkyl group having 3 to 6 carbon atoms are preferable, an alkyl group having 1 to 6 carbon atoms, a cyclopentyl group, and a cyclohexyl group are more preferable, and an alkyl group having 1 to 4 carbon atoms is preferable. Further preferred are a methyl group, an ethyl group and a propyl group.
- R 1 is preferably a hydrogen atom, an alkyl group having 1 to 6 carbon atoms or a cycloalkyl group having 3 to 6 carbon atoms, more preferably a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, An atom, a methyl group, an ethyl group or a propyl group is more preferable, and a hydrogen atom is particularly preferable.
- R 2 is preferably an alkyl group having 1 to 6 carbon atoms or a cycloalkyl group having 3 to 6 carbon atoms, more preferably an alkyl group having 1 to 4 carbon atoms, a methyl group, an ethyl group or a propyl group. It is more preferably a group, and particularly preferably a methyl group.
- R 3 and R 4 are each independently preferably an alkyl group having 1 to 6 carbon atoms or a cycloalkyl group having 3 to 6 carbon atoms, and more preferably an alkyl group having 1 to 4 carbon atoms. More preferably, they are a methyl group, an ethyl group or a propyl group, and it is particularly preferable that both are methyl groups.
- R 5 , R 6 and R 7 are each independently preferably a hydrogen atom, an alkyl group having 1 to 6 carbon atoms or a cycloalkyl group having 3 to 6 carbon atoms, and preferably a hydrogen atom or 1 to 4 carbon atoms. And more preferably a hydrogen atom, a methyl group, an ethyl group or a propyl group, and particularly preferably all of them are hydrogen atoms.
- Examples of the amine compound (1) include 4-amino-1,1,3-trimethylindane, 4-amino-1,1,3-triethylindane, 4-amino-1,1,3,7-tetramethylindane, 4-amino-1,1,3,5,7-pentamethylindane, 4-amino-1,1,3,5,6,7-hexamethylindane, 4-methylamino-1,1,3,- And trimethylindane.
- Step (A) is a step of reacting the crude amine compound (1) and hydrogen halide in the presence of water and an organic solvent insoluble in water.
- the compound of formula (2) is hydrogenated to give formula (3) (In the formula, R 1 , R 2 , R 3 , R 4 , R 5 , R 6 and R 7 have the same meaning as described above.)
- An amine compound (1) can be obtained by reacting a compound represented by the formula (3) with an acid.
- the amine compound (1) in which R 1 is a hydrogen atom is obtained by reacting the compound represented by the formula (2) with a protecting reagent such as acetic anhydride, and then the formula (2) in which the nitrogen atom is protected with a protecting group.
- a compound represented by the formula (3) wherein the nitrogen atom is protected with a protecting group to obtain a compound represented by the formula (3) wherein the nitrogen atom is protected with a protecting group, It can also be obtained by reacting an acid with a compound represented by the formula (3) in which the nitrogen atom is protected with a protecting group.
- an acid sulfuric acid is preferred.
- the sulfuric acid concentration is usually 92 to 98% by weight, and preferably 92 to 97% by weight in terms of yield.
- the reaction between the compound represented by the formula (3) and the acid is carried out in the absence of a solvent, and the reaction temperature is usually 20 to 80 ° C.
- the resulting reaction mixture and water are mixed, the resulting mixture is neutralized with an alkali, and extracted with an organic solvent insoluble in water such as toluene to obtain a crude amine compound (1).
- a solution containing is obtained.
- the solution may be used as it is in the present invention, or may be used in the present invention after removing the solvent from the solution.
- the purity of the amine compound (1) in the crude amine compound (1) is usually 75 to 97%.
- the compound represented by the formula (2) can be obtained by depolymerizing an oligomer of the compound represented by the formula (2).
- the oligomer of the compound represented by the formula (2) include Antigen FR and Antigen RD (manufactured by Sumitomo Chemical Co., Ltd.).
- Depolymerization is performed by reacting the compound represented by the formula (2) with an acid catalyst.
- the acid catalyst include hydrochloric acid, sulfuric acid, nitric acid, tetrafluoroboric acid, p-toluenesulfonic acid, and p-toluenesulfonic acid hydrate, and preferably p-toluenesulfonic acid monohydrate.
- the amount of p-toluenesulfonic acid compound used is usually 0.1 to 30 parts by weight, preferably 0.1 to 20 parts by weight, based on 100 parts by weight of the oligomer of the compound represented by formula (2). More preferably, it is 1 to 10 parts by weight.
- the reaction temperature is usually 100 to 250 ° C., preferably 120 to 230 ° C., more preferably 140 to 200 ° C.
- the reaction may be performed under normal pressure, may be performed under reduced pressure, and is preferably performed under reduced pressure. When carried out under pressure, the pressure is usually from 0.1 to 10 kPa, preferably from 0.3 to 7 kPa, more preferably from 0.5 to 5 kPa.
- the reaction is preferably performed in the absence of a solvent. Depolymerization is preferably performed while the obtained compound represented by the formula (2) is distilled off from the reaction system under reduced pressure. The compound thus obtained has a relatively high purity.
- organic solvents insoluble in water examples include aliphatic hydrocarbon solvents such as hexane and heptane, aromatic hydrocarbon solvents such as toluene and xylene, hydrophobic ester solvents such as ethyl acetate, and hydrophobic properties such as diethyl ether and methylcyclopentyl ether
- aliphatic hydrocarbon solvents such as hexane and heptane
- aromatic hydrocarbon solvents such as toluene and xylene
- hydrophobic ester solvents such as ethyl acetate
- hydrophobic properties such as diethyl ether and methylcyclopentyl ether
- examples include ether solvents and hydrophobic ketone solvents such as methyl tert-butyl ketone, aliphatic hydrocarbon solvents and aromatic hydrocarbon solvents are preferred, and aromatic hydrocarbon solvents are preferred.
- the ratio of the amount of water and the amount of organic solvent insoluble in water is usually 1/99 to 99/1, preferably 5/95 to 95/5. / 90 to 90/10 is more preferable.
- the hydrogen halide examples include hydrogen chloride, hydrogen bromide and hydrogen iodide, preferably hydrogen chloride or hydrogen bromide, and more preferably hydrogen chloride.
- the hydrogen halide may be used as it is or in the form of an aqueous solution. When an aqueous solution of hydrogen halide is used, the amount of water used may be determined in consideration of the amount of water in the aqueous solution.
- the amount of hydrogen halide used is usually 1 mol or more per 1 mol of the amine compound (1). Although there is no upper limit, it is practically 2 mol or less with respect to 1 mol of the amine compound (1).
- the reaction between the amine compound (1) and the hydrogen halide is usually carried out by mixing the amine compound (1) and the hydrogen halide.
- the mixing order is not limited.
- the reaction temperature is usually 0 to 100 ° C., preferably 5 to 90 ° C., more preferably 10 to 80 ° C.
- the reaction time is usually 0.1 to 24 hours, preferably 0.1 to 12 hours, and more preferably 0.1 to 6 hours.
- Step (B) is a step of separating the layer in which the hydrogen halide salt of amine compound (1) produced in step (A) is dissolved from the other layer.
- the obtained mixture is allowed to stand and subjected to a liquid separation treatment, whereby the layer in which the hydrogen halide salt of the amine compound (1) is dissolved and the other layer can be separated.
- the separated layer in which the hydrogen halide salt of the amine compound (1) is dissolved is an organic layer
- the organic layer can be washed with water as necessary.
- the separated layer in which the hydrogen halide salt of the amine compound (1) is dissolved is an aqueous layer
- the aqueous layer can be washed with the above-mentioned organic solvent insoluble in water as necessary.
- the amount of hydrogen halide used in the step (A) is 1.15 mol or more, preferably 1.2 mol or more, relative to 1 mol of the amine compound (1), the halogen of the produced amine compound (1)
- the hydride salt is usually dissolved in the organic layer.
- the amount of hydrogen halide used is less than 1.15 mol relative to 1 mol of amine compound (1), the produced hydrogen halide salt of amine compound (1) is usually dissolved in the aqueous layer. Therefore, the layer in which the hydrogen halide salt of the amine compound (1) is dissolved can be controlled by adjusting the amount of hydrogen halide used in the step (A).
- the hydrogen halide salt of the amine compound (1) is usually dissolved in the organic layer.
- the hydrogen halide salt of the amine compound (1) is usually dissolved in the aqueous layer. Therefore, the layer in which the hydrogen halide salt of the amine compound (1) is dissolved can be controlled by adjusting the halide ion concentration in the aqueous layer of the mixture.
- the method for adjusting the halide ion concentration in the aqueous layer include a method in which the mixture obtained in step (A) is mixed with a water-soluble inorganic halide such as sodium chloride.
- the temperature for separating the layer in which the hydrogen halide salt of the amine compound (1) is dissolved from the other layer is usually 0 to 100 ° C., preferably 5 to 90 ° C., more preferably 10 to 80 ° C. .
- Step (C) is a step of depositing the hydrogen halide salt of the amine compound (1) from the layer in which the hydrogen halide salt of the amine compound (1) obtained in the step (B) is dissolved.
- the precipitated hydrogen halide salt of the amine compound (1) can be taken out, for example, by cooling the layer in which the hydrogen halide salt of the amine compound (1) is dissolved as it is or after concentration.
- the cooling temperature is preferably 5 ° C. or more lower than the separation temperature in step (B), more preferably from ⁇ 15 to 50 ° C., further preferably from ⁇ 5 to 40 ° C., and from 0 to It is particularly preferable that the temperature is 30 ° C.
- the cooling time is usually 1 minute to 24 hours.
- Step (D) is a step in which the hydrogen halide salt of the amine compound (1) deposited in step (C) is taken out and reacted with a base. In the step (C), a purified amine compound (1) is obtained.
- the precipitated hydrogen halide salt of the amine compound (1) can be removed, for example, by filtering the mixture in which the salt is precipitated.
- the extracted hydrogen halide salt of the amine compound (1) can be washed with a suitable solvent, if necessary.
- Examples of the base include ammonia; alkali metal hydroxides such as lithium hydroxide, sodium hydroxide, and potassium hydroxide; alkaline earth metal hydroxides such as magnesium hydroxide, calcium hydroxide, and barium hydroxide; sodium bicarbonate, Examples include alkali metal hydrogen carbonates such as potassium hydrogen carbonate; alkali metal carbonates such as sodium carbonate and potassium carbonate; organic bases such as trimethylamine, triethylamine, ethyldiisopropylamine, pyridine, and quinoline.
- ammonia, sodium hydroxide, potassium hydroxide, calcium hydroxide, barium hydroxide, sodium hydrogen carbonate, trimethylamine, triethylamine and pyridine are preferable, ammonia, sodium hydroxide, potassium hydroxide and sodium hydrogen carbonate are more preferable, and water Sodium oxide and potassium hydroxide are more preferred.
- bases may be used as they are or in the form of a solution such as an aqueous solution.
- the reaction between the hydrogen halide salt of the amine compound (1) and the base is usually carried out by mixing the two.
- the reaction is preferably carried out in water.
- the amount of the base used is usually 1 mol or more per 1 mol of the hydrogen halide salt of the amine compound (1). Although there is no upper limit, it is practically 2 mol or less with respect to 1 mol of the hydrogen halide salt of the amine compound (1).
- the reaction temperature is usually 0 to 100 ° C.
- the reaction time is usually 0.1 to 5 hours.
- purified amine compound (1) means an amine compound (1) having a purity higher than that of the crude amine compound (1).
- the purity of the purified amine compound (1) is usually 97.5% or more.
- Example 1 Under a nitrogen atmosphere, 203.8 g of 2,2,4-trimethyl-1,2-dihydroquinoline oligomer and 6.8 g of p-toluenesulfonic acid monohydrate were added to the flask. After adjusting the pressure in the flask to 3 kPa, the obtained mixture was heated to 170 ° C. to obtain 174.6 g of 2,2,4-trimethyl-1,2-dihydroquinoline. Yield: 82.2%, purity: 95.9%.
- the obtained mixture was separated to obtain 240.3 g of a toluene solution containing 1-acetyl-2,2,4-trimethyl-1,2-dihydroquinoline. Content: 42.7% by weight, yield: 95.2%, purity: 97.1%.
- the resulting mixture was neutralized by dropping into 623.4 g of a 27 wt% aqueous sodium hydroxide solution, extracted with toluene, and 190.4 g of a toluene solution containing crude 4-amino-1,1,3-trimethylindane.
- Got. Content 39.1%, purity: 92.6%, yield: 76.4%.
- the resulting mixture was neutralized by adding dropwise to 550.2 g of a 27 wt% aqueous sodium hydroxide solution, extracted with toluene, and 106.3 g of a toluene solution containing crude 4-amino-1,1,3-trimethylindane.
- Got. Content 69.0%, purity 92.5%, yield: 85.7%.
- Example 2 Under a nitrogen atmosphere, the flask was charged with 158.5 g of a toluene solution (content: 25.2%) containing crude 4-amino-1,1,3-trimethylindane (purity: 88.5%) and 41.8 g of toluene. And 18.0 g of water were added. The obtained mixture was heated to 70 ° C., and 36.5 g of concentrated hydrochloric acid was added. The resulting mixture was stirred at 70 ° C. for 1 hour. The obtained mixture was allowed to stand and separated into an aqueous layer and an organic layer in which hydrochloride of 4-amino-1,1,3-trimethylindane was dissolved. The organic layer was cooled to 5 ° C.
- the obtained 4-amino-1,1,3-trimethylindane hydrochloride was dissolved in hot water. A sodium hydroxide aqueous solution was added to the obtained solution. Toluene was added to the obtained mixture, and then the organic layer was separated. The organic layer was washed with water and then concentrated under reduced pressure to obtain 36.9 g of light brown liquid 4-amino-1,1,3-trimethylindane. Yield: 92.2%, purity: 99.8%.
- Example 3 Under a nitrogen atmosphere, the flask was charged with 43.62 g of a toluene solution (content: 49.7%) containing crude 4-amino-1,1,3-trimethylindane (purity: 87.0%) and 65.0 g of toluene. And 9.78 g of water were added. The obtained mixture was heated to 70 ° C., and 13.5 g of concentrated hydrochloric acid was added. After stirring the obtained mixture at 70 ° C. for 1 hour, 1.81 g of sodium chloride was added and stirred. The obtained mixture was allowed to stand and separated into an aqueous layer and an organic layer in which hydrochloride of 4-amino-1,1,3-trimethylindane was dissolved.
- the organic layer was cooled to 5 ° C. with stirring to precipitate crystals of 4-amino-1,1,3-trimethylindane hydrochloride.
- the precipitated crystals were taken out by filtration to obtain 4-amino-1,1,3-trimethylindane hydrochloride. Melting point: 228-229 ° C.
- the obtained 4-amino-1,1,3-trimethylindane hydrochloride was dissolved in hot water. A sodium hydroxide aqueous solution was added to the obtained solution. Toluene was added to the obtained mixture, and then the organic layer was separated. The organic layer was washed with water and then concentrated under reduced pressure to obtain 22.4 g of a light brown liquid 4-amino-1,1,3-trimethylindane. Yield: 93.2%, purity: 99.7%.
- Example 4 Under a nitrogen atmosphere, the flask was charged with 96.9 g of a toluene solution (content: 39.4%) containing crude 4-amino-1,1,3-trimethylindane (purity: 87.1%) and 38.2 g of water. Was added. The resulting mixture was heated to 70 ° C., and 23.8 g of concentrated hydrochloric acid was added. The resulting mixture was stirred at 70 ° C. for 1 hour. The obtained mixture was allowed to stand, and separated into an organic layer and an aqueous layer in which hydrochloride of 4-amino-1,1,3-trimethylindane was dissolved. The aqueous layer was cooled to 5 ° C.
- the obtained 4-amino-1,1,3-trimethylindane hydrochloride was dissolved in hot water. A sodium hydroxide aqueous solution was added to the obtained solution. Toluene was added to the obtained mixture, and then the organic layer was separated. The organic layer was washed with water and then concentrated under reduced pressure to obtain 33.6 g of a light brown liquid 4-amino-1,1,3-trimethylindane. Yield: 88.0%, purity: 99.6%.
- Example 5 Under a nitrogen atmosphere, the flask was charged with crude optically active 4-amino-1,1,3-trimethylindane (purity: 96.7%, enantiomeric excess: 12.6%), 71.7 g of toluene and water. 8.14 g was added. The obtained mixture was heated to 70 ° C., and 14.0 g of concentrated hydrochloric acid was added. The resulting mixture was stirred at 70 ° C. for 1 hour. The obtained mixture was allowed to stand and separated into an aqueous layer and an organic layer in which hydrochloride of 4-amino-1,1,3-trimethylindane was dissolved. The organic layer was cooled to 5 ° C.
- the obtained 4-amino-1,1,3-trimethylindane hydrochloride was dissolved in hot water. A sodium hydroxide aqueous solution was added to the obtained solution. Toluene was added to the obtained mixture, and then the organic layer was separated. The organic layer was washed with water and then concentrated under reduced pressure to obtain 14.4 g of a light brown liquid 4-amino-1,1,3-trimethylindane. Yield: 79.5%, purity: 99.8%, enantiomeric excess 0.66%.
- Example 6 Under a nitrogen atmosphere, the flask was charged with 225.6 g of a toluene solution (content: 42.0%) containing crude 4-amino-1,1,3-trimethylindane (purity: 88.5%), and 90.2 g of toluene. And 18.0 g of water were added. After heating the resulting mixture to 65 ° C., 120.9 g of 47% hydrobromic acid was added. The resulting mixture was stirred at 65 ° C. for 1 hour. The obtained mixture was allowed to stand and separated into an aqueous layer and an organic layer in which hydrobromide of 4-amino-1,1,3-trimethylindane was dissolved. The organic layer was cooled to 10 ° C.
- the obtained hydrobromide of 4-amino-1,1,3-trimethylindane was dissolved in hot water to obtain an aqueous solution, and an aqueous sodium hydroxide solution was added. Toluene was added to the obtained mixture, and then the organic layer was separated. The organic layer was washed with water and then concentrated under reduced pressure to obtain 4-amino-1,1,3-trimethylindane as a light brown liquid. Yield: 132.57 g, yield: 90.0%, purity 99.3%.
- the obtained 4-amino-1,1,3-trimethylindane hydrochloride was dissolved in hot water. A sodium hydroxide aqueous solution was added to the obtained solution. Toluene was added to the obtained mixture, and then the organic layer was separated. The organic layer was washed with water and then concentrated under reduced pressure to obtain 23.1 g of brown liquid 4-amino-1,1,3-trimethylindane. Purity: 94.4%.
- a highly pure amine compound represented by the formula (1) can be produced.
Abstract
Description
[1]工程(A):粗製の式(1)
(式中、R1、R2、R3、R4、R5、R6およびR7は、それぞれ独立して、水素原子または炭化水素基を表わす。)
で示されるアミン化合物とハロゲン化水素とを、水および水に不溶の有機溶媒の存在下に反応させる工程、
工程(B):工程(A)で生成した式(1)で示されるアミン化合物のハロゲン化水素塩が溶解した層と他層とを分離する工程、
工程(C):工程(B)で得られた式(1)で示されるアミン化合物のハロゲン化水素塩が溶解した層から、式(1)で示されるアミン化合物のハロゲン化水素塩を析出させる工程、および、
工程(D):工程(C)で析出した式(1)で示されるアミン化合物のハロゲン化水素塩を取り出し、塩基と反応させる工程、
を含む精製された式(1)で示されるアミン化合物の製造方法。
[2]ハロゲン化水素が、塩化水素である[1]に記載の製造方法。
[3]工程(B)において、式(1)で示されるアミン化合物のハロゲン化水素塩が溶解した層が有機層である[1]または[2]に記載の製造方法。
[4]水層中のハロゲン化物イオン濃度が、0.8モル/L以上である[3]に記載の製造方法。
[5]式(1)
(式中、R1、R2、R3、R4、R5、R6およびR7は、それぞれ独立して、水素原子または炭化水素基を表わす。)
で示されるアミン化合物のハロゲン化水素塩。
[6] 式(2)
(式中、R1、R2、R3、R4、R5、R6およびR7は、それぞれ独立して、水素原子または炭化水素基を表わす。)
で示される化合物のオリゴマーを解重合する式(2)で示される化合物の製造方法。
[7] 式(2)で示される化合物のオリゴマーに酸触媒を加えて、減圧留去しながら実施する[6]に記載の製造方法。
(式中、R1、R2、R3、R4、R5、R6およびR7は上記と同一の意味を表わす。)
で示される化合物を得、式(3)で示される化合物と酸とを反応させることにより、アミン化合物(1)を得ることができる。R1が水素原子であるアミン化合物(1)は、式(2)で示される化合物と無水酢酸等の保護試薬とを反応させて、その窒素原子が保護基で保護された式(2)で示される化合物を得、その窒素原子が保護基で保護された式(2)で示される化合物を水素化して、その窒素原子が保護基で保護された式(3)で示される化合物を得、その窒素原子が保護基で保護された式(3)で示される化合物と酸とを反応させることにより得ることもできる。酸としては、硫酸が好ましい。硫酸濃度は、通常92~98重量%であり、収率の点で、92~97重量%が好ましい。式(3)で示される化合物と酸との反応は、溶媒の非存在下で実施され、反応温度は、通常20~80℃である。反応終了後、得られた反応混合物と水とを混合し、得られた混合物をアルカリで中和し、トルエン等の水に不溶の有機溶媒で抽出することにより、粗製のアミン化合物(1)を含む溶液が得られる。該溶液をそのまま本発明に用いてもよいし、該溶液から溶媒を除去した後に、本発明に用いてもよい。粗製のアミン化合物(1)中のアミン化合物(1)の純度は、通常75~97%である。
式(2)で示される化合物のオリゴマーとしては、アンチゲンFR、アンチゲンRD(住友化学(株)製)等が挙げられる。
解重合は、式(2)で示される化合物と酸触媒とを反応させることにより行われる。
酸触媒としては、塩酸、硫酸、硝酸、テトラフオロホウ酸、p−トルエンスルホン酸、p−トルエンスルホン酸水和物が挙げられ、好ましくは、p−トルエンスルホン酸一水和物である。
p−トルエンスルホン酸化合物の使用量は、式(2)で示される化合物のオリゴマー100重量部に対して、通常0.1~30重量部であり、好ましくは0.1~20重量部であり、より好ましくは1~10重量部である。
反応温度は、通常100~250℃であり、好ましくは120~230℃であり、より好ましくは140~200℃である。
反応は、常圧下で行ってもよいし、減圧下で行ってもよく、減圧下で行うのが好ましい。加圧下で行う場合、圧力は通常0.1~10kPaであり、好ましくは0.3~7kPaであり、より好ましくは0.5~5kPaである。
反応は、溶媒の非存在下で行なうことが好ましい。
得られた式(2)で示される化合物を反応系から減圧留去しながら、解重合することが好ましい。こうして得られた化合物は比較的高純度である。
窒素雰囲気下で、フラスコに、2,2,4−トリメチル−1,2−ジヒドロキノリンのオリゴマー203.8gとp−トルエンスルホン酸1水和物6.8gとを加えた。フラスコ内の圧力を3kPaに調整した後、得られた混合物を170℃に加熱し、2,2,4−トリメチル−1,2−ジヒドロキノリン174.6gを得た。収率:82.2%、純度:95.9%。
窒素雰囲気下で、フラスコに、2,2,4−トリメチル−1,2−ジヒドロキノリン89.3gと酢酸ナトリウム16.9gを加えた。得られた混合物を120℃に加熱した後、無水酢酸90gを滴下した。得られた混合物を120℃で8時間保温した後、冷却した。得られた反応混合物に、トルエン133.4gを加え、27重量%水酸化ナトリウム水溶液177.8gを滴下した。得られた混合物を分液して、1−アセチル−2,2,4−トリメチル−1,2−ジヒドロキノリンを含むトルエン溶液240.3gを得た。含量:42.7重量%、収率:95.2%、純度:97.1%。
フラスコに、1−アセチル−2,2,4−トリメチル−1,2−ジヒドロキノリンを含むトルエン溶液(含量:36.8重量%、純度:96.7%)267.8gと5重量%パラジウム/カーボン3.92gを加えた。フラスコ内を水素で加圧した後、得られた混合物を40℃で加熱した。反応終了後、反応混合物を濾過し、濾液を濃縮し、1−アセチル−2,2,4−トリメチルテトラヒドロキノリン100.5gを得た。収率:95.9%、純度:98.1%。
窒素雰囲気下で、1−アセチル−2,2,4−トリメチルテトラヒドロキノリン125.2gを90℃に加熱した後、98重量%硫酸184.8gに滴下した。得られた混合物を60℃で保温した。得られた反応混合物を98℃の熱水に滴下した。得られた混合物を105℃に加熱し、同温度で4時間保温した。得られた混合物を27重量%水酸化ナトリウム水溶液623.4gに滴下して中和した後、トルエンで抽出し、粗製の4−アミノ−1,1,3−トリメチルインダンを含むトルエン溶液190.4gを得た。含量:39.1%、純度:92.6%、収率:76.4%。
窒素雰囲気下で、1−アセチル−2,2,4−トリメチルテトラヒドロキノリン110gを90℃に加熱した後、96重量%硫酸166gに滴下した。得られた混合物を60℃で保温した。得られた反応混合物を98℃の熱水に滴下した。得られた混合物を105℃に加熱し、同温度で4時間保温した。得られた混合物を27重量%水酸化ナトリウム水溶液550.2gに滴下して中和した後、トルエンで抽出し、粗製の4−アミノ−1,1,3−トリメチルインダンを含むトルエン溶液106.3gを得た。含量:69.0%、純度92.5%、収率:85.7%。
窒素雰囲気下で、フラスコに、粗製の4−アミノ−1,1,3−トリメチルインダン(純度:88.5%)を含むトルエン溶液(含量:25.2%)158.5g、トルエン41.8gおよび水18.0gを加えた。得られた混合物を70℃まで加熱した後、濃塩酸36.5gを加えた。得られた混合物を70℃で1時間攪拌した。得られた混合物を静置し、水層と4−アミノ−1,1,3−トリメチルインダンの塩酸塩が溶解した有機層とに分離した。該有機層を攪拌しながら5℃まで冷却し、4−アミノ−1,1,3−トリメチルインダンの塩酸塩の結晶を析出させた。析出した結晶を濾過により取り出し、4−アミノ−1,1,3−トリメチルインダンの塩酸塩を得た。融点:228~229℃。
窒素雰囲気下で、フラスコに、粗製の4−アミノ−1,1,3−トリメチルインダン(純度:87.0%)を含むトルエン溶液(含量:49.7%)43.62g、トルエン65.0gおよび水9.78gを加えた。得られた混合物を70℃まで加熱した後、濃塩酸13.5gを加えた。得られた混合物を70℃で1時間攪拌した後、塩化ナトリウム1.81gを加え、撹拌した。得られた混合物を静置し、水層と4−アミノ−1,1,3−トリメチルインダンの塩酸塩が溶解した有機層とに分離した。該有機層を攪拌しながら5℃まで冷却し、4−アミノ−1,1,3−トリメチルインダンの塩酸塩の結晶を析出させた。析出した結晶を濾過により取り出し、4−アミノ−1,1,3−トリメチルインダンの塩酸塩を得た。融点:228~229℃。
窒素雰囲気下で、フラスコに、粗製の4−アミノ−1,1,3−トリメチルインダン(純度:87.1%)を含むトルエン溶液(含量:39.4%)96.9gおよび水38.2gを加えた。得られた混合物を70℃まで加熱した後、濃塩酸23.8gを加えた。得られた混合物を70℃で1時間攪拌した。得られた混合物を静置し、有機層と4−アミノ−1,1,3−トリメチルインダンの塩酸塩が溶解した水層とに分離した。該水層を攪拌しながら5℃まで冷却し、4−アミノ−1,1,3−トリメチルインダンの塩酸塩の結晶を析出させた。析出した結晶を濾過により取り出し、4−アミノ−1,1,3−トリメチルインダンの塩酸塩を得た。融点:228~229℃。
窒素雰囲気下で、フラスコに、粗製の光学活性な4−アミノ−1,1,3−トリメチルインダン(純度:96.7%、鏡像体過剰率:12.6%)、トルエン71.7gおよび水8.14gを加えた。得られた混合物を70℃まで加熱した後、濃塩酸14.0gを加えた。得られた混合物を70℃で1時間攪拌した。得られた混合物を静置し、水層と4−アミノ−1,1,3−トリメチルインダンの塩酸塩が溶解した有機層とに分離した。該有機層を攪拌しながら5℃まで冷却し、4−アミノ−1,1,3−トリメチルインダンの塩酸塩の結晶を析出させた。析出した結晶を濾過により取り出し、4−アミノ−1,1,3−トリメチルインダンの塩酸塩を得た。融点:228~229℃。
窒素雰囲気下で、フラスコに、粗製の4−アミノ−1,1,3−トリメチルインダン(純度:88.5%)を含むトルエン溶液(含量:42.0%)225.6g、トルエン90.2gおよび水18.0gを加えた。得られた混合物を65℃まで加熱した後、47%臭化水素酸120.9gを加えた。得られた混合物を65℃で1時間攪拌した。得られた混合物を静置し、水層と4−アミノ−1,1,3−トリメチルインダンの臭化水素酸塩が溶解した有機層とに分離した。該有機層を攪拌しながら10℃まで冷却し、4−アミノ−1,1,3−トリメチルインダンの臭化水素酸塩の結晶を析出させた。析出した結晶を濾別し、4−アミノ−1,1,3−トリメチルインダンの臭化水素酸塩を得た。融点:199~200℃。
窒素雰囲気下で、フラスコに、粗製の4−アミノ−1,1,3−トリメチルインダン(純度:87.0%)を含むトルエン溶液(含量:39.4%)62.5gを加え、5℃に冷却した。濃塩酸18.4gをこれに滴下した後、得られた混合物を濾過することにより、4−アミノ−1,1,3−トリメチルインダンの塩酸塩を取り出した。
窒素雰囲気下で、フラスコに、粗製の4−アミノ−1,1,3−トリメチルインダン(純度:87.6%)を含むトルエン溶液(含量:39.5%)110.2gを加えた。フラスコ内の圧力を10kPaに減圧し、60℃に加熱して、トルエンを留去した。さらに2.0kPaまで圧力を減圧した後、140℃まで加熱し、薄褐色液状の4−アミノ−1,1,3−トリメチルインダン39.9gを得た。収率:87.0%、純度:92.5%。
Claims (7)
- 工程(A):粗製の式(1)
(式中、R1、R2、R3、R4、R5、R6およびR7は、それぞれ独立して、水素原子または炭化水素基を表わす。)
で示されるアミン化合物とハロゲン化水素とを、水および水に不溶の有機溶媒の存在下に反応させる工程、
工程(B):工程(A)で生成した式(1)で示されるアミン化合物のハロゲン化水素塩が溶解した層と他層とを分離する工程、
工程(C):工程(B)で得られた式(1)で示されるアミン化合物のハロゲン化水素塩が溶解した層から、式(1)で示されるアミン化合物のハロゲン化水素塩を析出させる工程、および、
工程(D):工程(C)で析出した式(1)で示されるアミン化合物のハロゲン化水素塩を取り出し、塩基と反応させる工程、
を含む精製された式(1)で示されるアミン化合物の製造方法。 - ハロゲン化水素が、塩化水素である請求項1に記載の製造方法。
- 工程(B)において、式(1)で示されるアミン化合物のハロゲン化水素塩が溶解した層が有機層である請求項1または2に記載の製造方法。
- 水層中のハロゲン化物イオン濃度が、0.8モル/L以上である請求項3に記載の製造方法。
- 式(2)で示される化合物のオリゴマーに酸触媒を加えて、減圧留去しながら実施する請求項6に記載の製造方法。
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US9284260B2 (en) | 2012-11-02 | 2016-03-15 | Sumitomo Chemical Company, Limited | Method for producing racemate of compound |
WO2017133981A1 (de) | 2016-02-03 | 2017-08-10 | Bayer Cropscience Aktiengesellschaft | Verfahren zur herstellung von substituierten 4-amino-indan-derivaten |
WO2019002042A1 (en) | 2017-06-27 | 2019-01-03 | Bayer Aktiengesellschaft | PROCESS FOR THE PREPARATION OF SUBSTITUTED 4-AMINOINDANE DERIVATIVES |
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WO2019224179A1 (en) | 2018-05-23 | 2019-11-28 | Bayer Aktiengesellschaft | Process for producing substituted 4-aminoindane derivatives from 2-(hydroxyalkyl)-anilines |
WO2019224181A1 (en) | 2018-05-23 | 2019-11-28 | Bayer Aktiengesellschaft | Process for producing substituted 4-aminoindanes |
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AU2014381760B2 (en) | 2014-02-07 | 2018-08-02 | Sumitomo Chemical Company, Limited | Method for producing (R)-1,1,3-trimethyl-4-aminoindane |
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JP7049371B2 (ja) | 2017-06-27 | 2022-04-06 | バイエル・アクチエンゲゼルシヤフト | 置換4-アミノインダン誘導体を調製する方法 |
WO2019224179A1 (en) | 2018-05-23 | 2019-11-28 | Bayer Aktiengesellschaft | Process for producing substituted 4-aminoindane derivatives from 2-(hydroxyalkyl)-anilines |
WO2019224181A1 (en) | 2018-05-23 | 2019-11-28 | Bayer Aktiengesellschaft | Process for producing substituted 4-aminoindanes |
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