JP2012046502A - Method for producing aminoalkyl thiosulfuric acid compound - Google Patents

Method for producing aminoalkyl thiosulfuric acid compound Download PDF

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JP2012046502A
JP2012046502A JP2011163959A JP2011163959A JP2012046502A JP 2012046502 A JP2012046502 A JP 2012046502A JP 2011163959 A JP2011163959 A JP 2011163959A JP 2011163959 A JP2011163959 A JP 2011163959A JP 2012046502 A JP2012046502 A JP 2012046502A
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thiosulfuric acid
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Orhan Ozturk
オルハン オズトゥルク
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Sumitomo Chemical Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a method for producing an aminoalkyl thiosulfuric acid compound which is suitable for production in an industrial scale.SOLUTION: This method for producing an aminoalkyl thiosulfuric acid compound represented by formula (1) includes following processes (A)-(C) (in the formula, Rand Reach independently represent a hydrogen atom or 1-6C alkyl group, or Rand Rrepresent together a 2-9C polymethylene group, and n represents an integer of 2-9): (A) a process wherein a hydrochloride represented by formula (2) (in the formula R, Rand n each represent the same as described above), and an alkali metal salt of thiosulfuric acid are reacted at 50-100°C in the presence of 2-6 pts.wt. water to 1 pt.wt. hydrochloride represented by the formula (2); (B) a process wherein the temperature of the reactant mixture is adjusted to be ≥-15 and <50°C, and a mixture of a solid containing the compound represented by the formula (1) and a liquid containing an alkali metal chloride is obtained; and (C) a process wherein the solid containing the compound represented by the formula (1) and the liquid containing an alkali metal chloride are separated from the mixture obtained in the process (B), and an aminoalkyl thiosulfuric acid compound is acquired as a solid.

Description

本発明は、アミノアルキルチオ硫酸化合物の製造方法に関する。   The present invention relates to a method for producing an aminoalkylthiosulfuric acid compound.

アミノアルキルチオ硫酸化合物の製造方法としては、例えば、6−ブロモヘキシルアミン臭化水素酸塩とチオ硫酸ナトリウムとを、6−ブロモヘキシルアミン臭化水素酸塩1重量部に対して23.2重量部の水の存在下で反応させ、次いで、得られた溶液をその容量が半分になるまで濃縮し、生じた沈殿を濾集する方法が知られている。   Examples of the method for producing an aminoalkylthiosulfuric acid compound include, for example, 23.2 parts by weight of 6-bromohexylamine hydrobromide and sodium thiosulfate with respect to 1 part by weight of 6-bromohexylamine hydrobromide. It is known to react in the presence of water, then concentrate the resulting solution to half its volume and collect the resulting precipitate by filtration.

特開昭60−199643号公報(実施例24)JP-A-60-199643 (Example 24)

工業的規模での製造に好適なアミノアルキルチオ硫酸化合物の製造方法が望まれていた。   A method for producing an aminoalkylthiosulfuric acid compound suitable for production on an industrial scale has been desired.

本発明は下記〔1〕〜〔4〕に記載される製造方法を提供するものである。
〔1〕下記工程(A)〜(C)を含むことを特徴とする式(1)

Figure 2012046502
(式中、R及びRはそれぞれ独立に水素原子又は炭素数1〜6のアルキル基を表すか、RとRが一緒になって炭素数2〜9のポリメチレン基を表す。nは2〜9の整数を表す。)
で示されるアミノアルキルチオ硫酸化合物の製造方法。
(A):式(2)
Figure 2012046502
(式中、R、R及びnはそれぞれ上記と同じ意味を表す。)
で示されるクロロアルキルアミン化合物の塩酸塩とチオ硫酸のアルカリ金属塩とを、上記式(2)で示されるクロロアルキルアミン化合物の塩酸塩1重量部に対して2〜6重量部の水の存在下、50〜100℃で反応させる工程
(B):工程(A)で得られた反応混合物の温度を−15℃以上50℃未満に調整し、上記式(1)で示されるアミノアルキルチオ硫酸化合物を含有する固体とアルカリ金属塩化物を含有する液体との混合物を得る工程
(C):工程(B)で得られた混合物から上記式(1)で示されるアミノアルキルチオ硫酸化合物を含有する固体とアルカリ金属塩化物を含有する液体とを分離し、固体としてアミノアルキルチオ硫酸化合物を取得する工程
〔2〕工程(A)における水の量が、上記式(2)で示されるクロロアルキルアミン化合物の塩酸塩1重量部に対して2.5〜4重量部である〔1〕記載の製造方法。
〔3〕工程(A)におけるチオ硫酸のアルカリ金属塩の使用量が、上記式(2)で示されるクロロアルキルアミン化合物の塩酸塩1.0モルに対して、0.9〜1.5モルである〔1〕又は〔2〕記載の製造方法。
〔4〕工程(B)における反応混合物の温度が−15℃以上30℃以下である〔1〕〜〔3〕のいずれか一項記載の製造方法。 The present invention provides the production method described in the following [1] to [4].
[1] Formula (1) including the following steps (A) to (C)
Figure 2012046502
(In the formula, R 1 and R 2 each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, or R 1 and R 2 together represent a polymethylene group having 2 to 9 carbon atoms. N Represents an integer of 2 to 9.)
The manufacturing method of the aminoalkyl thiosulfuric acid compound shown by these.
(A): Formula (2)
Figure 2012046502
(In the formula, R 1 , R 2 and n each have the same meaning as described above.)
The presence of 2 to 6 parts by weight of water with respect to 1 part by weight of the chloroalkylamine compound hydrochloride represented by the above formula (2) Step (B) of reacting at 50 to 100 ° C. below: The temperature of the reaction mixture obtained in Step (A) is adjusted to −15 ° C. or higher and lower than 50 ° C., and the aminoalkylthiosulfuric acid compound represented by the above formula (1) Step (C) for obtaining a mixture of a solid containing a liquid and a liquid containing an alkali metal chloride: A solid containing an aminoalkylthiosulfuric acid compound represented by the above formula (1) from the mixture obtained in Step (B); The step of separating the liquid containing the alkali metal chloride and obtaining the aminoalkylthiosulfuric acid compound as a solid [2] The amount of water in the step (A) is the amount of water represented by the above formula (2). Manufacturing method of 2.5-4 parts by weight [1], wherein with respect to hydrochloride 1 part by weight of triethanolamine compound.
[3] The amount of alkali metal salt of thiosulfuric acid used in the step (A) is 0.9 to 1.5 mol with respect to 1.0 mol of the hydrochloride of the chloroalkylamine compound represented by the above formula (2). The production method according to [1] or [2].
[4] The production method according to any one of [1] to [3], wherein the temperature of the reaction mixture in step (B) is −15 ° C. or higher and 30 ° C. or lower.

本発明のアミノアルキルチオ硫酸化合物の製造方法は、工業的規模での製造に好適である。   The method for producing an aminoalkylthiosulfuric acid compound of the present invention is suitable for production on an industrial scale.

以下、本発明を詳細に説明する。   Hereinafter, the present invention will be described in detail.

まず、上記工程(A)について説明する。工程(A)は、上記式(2)で示されるクロロアルキルアミン化合物の塩酸塩(以下、化合物(2)と記すことがある)とチオ硫酸のアルカリ金属塩とを、化合物(2)1重量部に対して2〜6重量部の水の存在下、50〜100℃で反応させる工程である。   First, the step (A) will be described. In the step (A), a hydrochloride of the chloroalkylamine compound represented by the above formula (2) (hereinafter sometimes referred to as the compound (2)) and an alkali metal salt of thiosulfuric acid are added to 1 weight of the compound (2). It is the process made to react at 50-100 degreeC in presence of 2-6 weight part water with respect to a part.

式(2)においてR及びRで示される炭素数1〜6のアルキル基としては、例えば、メチル基、エチル基、n−プロピル基、i−プロピル基、n−ブチル基、s−ブチル基、t−ブチル基、n−ペンチル基、n−ヘキシル基等の直鎖状又は分岐状のものが挙げられる。また、RとRが一緒になって表される炭素数2〜6のポリメチレン基としては、エチレン基(ジメチレン基)、トリメチレン基、テトラメチレン基、ペンタメチレン基、ヘキサメチレン基が挙げられる。
及びRは、水素原子であることが好ましい。
Examples of the alkyl group having 1 to 6 carbon atoms represented by R 1 and R 2 in the formula (2) include a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, and an s-butyl group. And linear or branched groups such as a group, a t-butyl group, an n-pentyl group, and an n-hexyl group. Examples of the polymethylene group having 2 to 6 carbon atoms represented by R 1 and R 2 taken together include an ethylene group (dimethylene group), a trimethylene group, a tetramethylene group, a pentamethylene group, and a hexamethylene group. .
R 1 and R 2 are preferably hydrogen atoms.

化合物(2)としては、例えば、2−クロロエチルアミン塩酸塩、3−クロロプロピルアミン塩酸塩、4−クロロブチルアミン塩酸塩、5−クロロペンチルアミン塩酸塩、6−クロロヘキシルアミン塩酸塩、1−クロロ−3−(メチルアミノ)プロパン塩酸塩、1−クロロ−3−(エチルアミノ)プロパン塩酸塩、1−クロロ−3−(ジメチルアミノ)プロパン塩酸塩、1−クロロ−3−ピペリジノプロパン塩酸塩等が挙げられる。   Examples of the compound (2) include 2-chloroethylamine hydrochloride, 3-chloropropylamine hydrochloride, 4-chlorobutylamine hydrochloride, 5-chloropentylamine hydrochloride, 6-chlorohexylamine hydrochloride, 1-chloro -3- (methylamino) propane hydrochloride, 1-chloro-3- (ethylamino) propane hydrochloride, 1-chloro-3- (dimethylamino) propane hydrochloride, 1-chloro-3-piperidinopropane hydrochloride Examples include salts.

化合物(2)は、市販のものを用いることもできるし、例えば、式(3)

Figure 2012046502
(式中、nは2〜9の整数を表す。)
で示されるアルコール化合物(以下、化合物(3)と記すことがある)と塩化チオニル(SOCl)とを接触させる方法、ジクロロアルカンとフタルイミドカリウム塩とを反応させ、次いで得られた化合物をヒドラジンまたは1級アミンと接触させる方法等の方法により製造して用いることもできる。 As the compound (2), a commercially available compound can be used. For example, the compound (2)
Figure 2012046502
(In the formula, n represents an integer of 2 to 9.)
A method of contacting thionyl chloride (SOCl 2 ) with an alcohol compound represented by formula (hereinafter sometimes referred to as compound (3)), reacting dichloroalkane and phthalimide potassium salt, and then converting the resulting compound to hydrazine or It can also be produced and used by a method such as a method of contacting with a primary amine.

チオ硫酸のアルカリ金属塩としては、チオ硫酸リチウム、チオ硫酸ナトリウム、チオ硫酸カリウム、チオ硫酸ルビジウム、チオ硫酸セシウムが挙げられる。チオ硫酸ナトリウム又はチオ硫酸カリウムが好ましく、チオ硫酸ナトリウムがより好ましい。チオ硫酸のアルカリ金属塩は水和物であってもよい。   Examples of the alkali metal salt of thiosulfuric acid include lithium thiosulfate, sodium thiosulfate, potassium thiosulfate, rubidium thiosulfate, and cesium thiosulfate. Sodium thiosulfate or potassium thiosulfate is preferred, and sodium thiosulfate is more preferred. The alkali metal salt of thiosulfuric acid may be a hydrate.

チオ硫酸のアルカリ金属塩の使用量は、化合物(2)1.0モルに対して、0.9モル以上であればよく、0.9〜1.5モルが好ましく、1.0〜1.1モルがより好ましい。   The usage-amount of the alkali metal salt of thiosulfuric acid should just be 0.9 mol or more with respect to 1.0 mol of compound (2), 0.9-1.5 mol is preferable, and 1.0-1. 1 mole is more preferred.

化合物(2)とチオ硫酸のアルカリ金属塩との反応は、化合物(2)1重量部に対して2〜6重量部の水の存在下で行われる。チオ硫酸のアルカリ金属塩として水和物を用いる場合は、かかる水和物に含まれる水も、ここでいう水に含まれるものとする。水の使用量が化合物(2)1重量部に対して2重量部以上であれば、後述する工程(B)において、アルカリ金属塩化物の析出を抑制できる。また、水の使用量が化合物(2)1重量部に対して6重量部以下であれば、後述する工程(B)において、上記式(1)で示されるアミノアルキルチオ硫酸化合物(以下、化合物(1)と記すことがある)の析出を促進できる。かかる水の使用量は、化合物(2)1重量部に対して2.5〜4重量部であることが好ましい。   The reaction between the compound (2) and the alkali metal salt of thiosulfuric acid is carried out in the presence of 2 to 6 parts by weight of water with respect to 1 part by weight of the compound (2). When a hydrate is used as the alkali metal salt of thiosulfuric acid, the water contained in the hydrate is also included in the water here. If the usage-amount of water is 2 weight part or more with respect to 1 weight part of compound (2), precipitation of an alkali metal chloride can be suppressed in the process (B) mentioned later. Moreover, if the usage-amount of water is 6 weight part or less with respect to 1 weight part of compound (2), in the process (B) mentioned later, the aminoalkyl thiosulfuric acid compound (henceforth, compound (1)) shown by said Formula (1). 1)) may be promoted. The amount of water used is preferably 2.5 to 4 parts by weight per 1 part by weight of compound (2).

化合物(2)とチオ硫酸のアルカリ金属塩との反応温度は50〜100℃、好ましくは60〜100℃、より好ましくは70〜100℃である。反応時間は通常10分〜24時間の範囲である。反応の進行は、薄層クロマトグラフィー、高速液体クロマトグラフィー、H−NMR等の通常用いられる分析により確認できる。 The reaction temperature of the compound (2) and the alkali metal salt of thiosulfuric acid is 50 to 100 ° C, preferably 60 to 100 ° C, more preferably 70 to 100 ° C. The reaction time is usually in the range of 10 minutes to 24 hours. The progress of the reaction can be confirmed by commonly used analyzes such as thin layer chromatography, high performance liquid chromatography, and 1 H-NMR.

次に、上記工程(B)について説明する。工程(B)は、上記工程(A)で得られた反応混合物の温度を−15℃以上50℃未満に調整し、化合物(1)を含有する固体とアルカリ金属塩化物を含有する液体との混合物を得る工程である。   Next, the said process (B) is demonstrated. In the step (B), the temperature of the reaction mixture obtained in the step (A) is adjusted to −15 ° C. or higher and lower than 50 ° C., and the solid containing the compound (1) and the liquid containing the alkali metal chloride are used. This is a step of obtaining a mixture.

上記工程(A)で得られた反応混合物は、部分濃縮したり水を加えたりした後に工程(B)に供することもできるが、工程(A)で使用した水の使用量が上記の範囲であれば、通常、その必要はない。   The reaction mixture obtained in the step (A) can be subjected to the step (B) after partial concentration or addition of water, but the amount of water used in the step (A) is within the above range. If so, it is usually not necessary.

上記工程(A)で得られた反応混合物の温度を−15℃以上50℃未満、好ましくは−15℃以上30℃以下に調整することにより、化合物(1)を析出させることができる。上記工程(A)で得られた反応混合物の温度が−15℃以上であれば、アルカリ金属塩化物の析出を抑制でき、操作性も良好である。また、50℃未満であれば、化合物(1)の析出を促進できる。化合物(1)の析出が十分でないときは温度を下げ、アルカリ金属塩化物の析出が多いときは温度を上げることにより、両者の析出量のバランスを所望の範囲に調整することができる。   The compound (1) can be precipitated by adjusting the temperature of the reaction mixture obtained in the step (A) to −15 ° C. or higher and lower than 50 ° C., preferably −15 ° C. or higher and 30 ° C. or lower. If the temperature of the reaction mixture obtained at the said process (A) is -15 degreeC or more, precipitation of an alkali metal chloride can be suppressed and operativity is also favorable. Moreover, if it is less than 50 degreeC, precipitation of a compound (1) can be accelerated | stimulated. When the precipitation of the compound (1) is not sufficient, the temperature can be lowered, and when the precipitation of the alkali metal chloride is large, the temperature can be raised to adjust the balance between the precipitation amounts to a desired range.

かかる温度操作により、化合物(1)を主に含有する固体とアルカリ金属塩化物を含有する液体との混合物を得ることができる。   By such temperature operation, a mixture of a solid mainly containing the compound (1) and a liquid containing an alkali metal chloride can be obtained.

なお、工程(A)及び(B)において有機溶媒を用いてもよいが、化合物(1)の析出量が少なくなったり、アルカリ金属塩化物が析出したりすることがあるので、有機溶媒の使用量は少ない方が好ましく、有機溶媒は使用しない方がより好ましい。   In addition, although an organic solvent may be used in the steps (A) and (B), since the precipitation amount of the compound (1) may decrease or an alkali metal chloride may precipitate, use of the organic solvent A smaller amount is preferred, and it is more preferred not to use an organic solvent.

最後に、上記工程(C)について説明する。工程(C)は、上記工程(B)で得られた混合物から化合物(1)を含有する固体とアルカリ金属塩化物を含有する液体とを分離し、固体として化合物(1)を取得する工程である。   Finally, the step (C) will be described. The step (C) is a step of separating the solid containing the compound (1) and the liquid containing the alkali metal chloride from the mixture obtained in the step (B) to obtain the compound (1) as a solid. is there.

上記工程(B)で得られた混合物は、部分濃縮したり水を加えたりした後に工程(C)に供することもできるが、上記工程(A)で使用した水の使用量が上記の範囲であれば、通常、その必要はない。   The mixture obtained in the step (B) can be subjected to the step (C) after partial concentration or addition of water, but the amount of water used in the step (A) is within the above range. If so, it is usually not necessary.

化合物(1)を含有する固体とアルカリ金属塩化物を含有する液体との分離は、通常、上記工程(B)と同じ温度範囲で行われる。かかる分離は、例えば濾過やデカンテーション等の通常の固液分離操作により実施される。   Separation of the solid containing the compound (1) and the liquid containing the alkali metal chloride is usually performed in the same temperature range as in the step (B). Such separation is performed by a normal solid-liquid separation operation such as filtration or decantation.

かかる分離操作により得られる固体には、通常、液体が付着しており、固体を水又は水溶性有機溶媒(例えば、メタノールやエタノール等のアルコール溶媒)等を用いて洗浄処理することにより、液体を除去することができる。さらに、必要に応じて固体を乾燥処理することもできる。   The solid obtained by such a separation operation usually has a liquid attached thereto, and the solid is washed with water or a water-soluble organic solvent (for example, an alcohol solvent such as methanol or ethanol). Can be removed. Furthermore, if necessary, the solid can be dried.

かくして得られる固体に含有される化合物(1)としては、例えばS−(2−アミノエチル)チオ硫酸、S−(3−アミノプロピル)チオ硫酸、S−(4−アミノブチル)チオ硫酸、S−(5−アミノペンチル)チオ硫酸、S−(6−アミノヘキシル)チオ硫酸、S−(3−メチルアミノプロピル)チオ硫酸、S−(3−エチルアミノプロピル)チオ硫酸、S−(3−ジメチルアミノプロピル)チオ硫酸、S−(3−ピペリジノプロピル)チオ硫酸等が挙げられる。   Examples of the compound (1) contained in the solid thus obtained include S- (2-aminoethyl) thiosulfuric acid, S- (3-aminopropyl) thiosulfuric acid, S- (4-aminobutyl) thiosulfuric acid, S -(5-aminopentyl) thiosulfuric acid, S- (6-aminohexyl) thiosulfuric acid, S- (3-methylaminopropyl) thiosulfuric acid, S- (3-ethylaminopropyl) thiosulfuric acid, S- (3- Dimethylaminopropyl) thiosulfuric acid, S- (3-piperidinopropyl) thiosulfuric acid and the like.

以下、実施例を挙げて本発明を具体的に説明するが、本発明はこれらに限定されるものではない。   EXAMPLES Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited thereto.

実施例1
窒素置換された反応容器に3−クロロプロピルアミン塩酸塩100g(0.77mol)を仕込み、水180mLを加えて3−クロロプロピルアミン塩酸塩を溶解させた。そこにチオ硫酸ナトリウム五水和物200.4g(0.81mol)を加えた後、得られた水溶液を60〜70℃に保温し、反応容器を浴温80℃で加熱しながら、その中の溶液を攪拌した。浴温80℃で4時間攪拌した後にH−NMRを測定したところ、反応が完結していることを確認した。浴温80℃で約5時間攪拌した後に浴槽を外して放冷した(以上、工程(A))。反応混合物を室温で一晩攪拌したところ、S−(3−アミノプロピル)チオ硫酸を主に含有する結晶が析出した(以上、工程(B))。得られた混合物を濾過することにより、上記の結晶を取得し、少量の水、メタノール50mLで順次洗浄した後、50℃で4時間乾燥させた(以上、工程(C))。
結晶の取得量は97.8gであった。得られた結晶中の塩化物イオン濃度をイオンクロマトグラフィーにより測定したところ、0.56%(塩化ナトリウムとして0.92重量%)であった。S−(3−アミノプロピル)チオ硫酸の取得率:73.6%
ここでS−(3−アミノプロピル)チオ硫酸の取得率とは、結晶の取得量から塩化ナトリウムの含有量を除いたものをS−(3−アミノプロピル)チオ硫酸の取得量として求めたS−(3−アミノプロピル)チオ硫酸の収率をいう。
Example 1
100 g (0.77 mol) of 3-chloropropylamine hydrochloride was charged into a reaction vessel purged with nitrogen, and 180 mL of water was added to dissolve 3-chloropropylamine hydrochloride. 200.4 g (0.81 mol) of sodium thiosulfate pentahydrate was added thereto, and the resulting aqueous solution was kept at 60 to 70 ° C., while the reaction vessel was heated at a bath temperature of 80 ° C., The solution was stirred. After stirring for 4 hours at a bath temperature of 80 ° C., 1 H-NMR was measured to confirm that the reaction was complete. After stirring at a bath temperature of 80 ° C. for about 5 hours, the bath was removed and the mixture was allowed to cool (step (A)). When the reaction mixture was stirred overnight at room temperature, crystals mainly containing S- (3-aminopropyl) thiosulfuric acid were precipitated (above, step (B)). The obtained mixture was filtered to obtain the above crystals, washed successively with a small amount of water and 50 mL of methanol, and dried at 50 ° C. for 4 hours (step (C) above).
The amount of crystals obtained was 97.8 g. The chloride ion concentration in the obtained crystal was measured by ion chromatography and found to be 0.56% (0.92% by weight as sodium chloride). Acquisition rate of S- (3-aminopropyl) thiosulfuric acid: 73.6%
Here, the acquisition rate of S- (3-aminopropyl) thiosulfuric acid is obtained by subtracting the content of sodium chloride from the acquisition amount of crystals as the acquisition amount of S- (3-aminopropyl) thiosulfuric acid. It refers to the yield of-(3-aminopropyl) thiosulfuric acid.

実施例2、4及び参考例1、2
実施例1において、水の使用量を表1記載の量とし、工程(B)の冷却温度を表1記載の温度とした以外は実施例1と同様にして、S−(3−アミノプロピル)チオ硫酸を主に含有する結晶を取得した。結果を実施例1とともに表1に示す。表1中、3−クロロプロピルアミン塩酸塩を化合物(2)と、S−(3−アミノプロピル)チオ硫酸を化合物(1)と、それぞれ記載する。
Examples 2 and 4 and Reference Examples 1 and 2
In Example 1, S- (3-aminopropyl) was used in the same manner as in Example 1 except that the amount of water used was the amount shown in Table 1, and the cooling temperature in step (B) was the temperature shown in Table 1. Crystals mainly containing thiosulfuric acid were obtained. The results are shown in Table 1 together with Example 1. In Table 1, 3-chloropropylamine hydrochloride is described as compound (2), and S- (3-aminopropyl) thiosulfuric acid is described as compound (1).

実施例3
窒素置換された反応容器に3−クロロプロピルアミン塩酸塩100g(0.77mol)を仕込み、水200mLを加えて3−クロロプロピルアミン塩酸塩を溶解させた。室温でチオ硫酸ナトリウム五水和物200.4g(0.81mol)を加えた後、反応容器を浴温70℃で加熱しながら、その中の溶液を攪拌した。浴温70℃で7時間攪拌した後にH−NMRを測定したところ、3−クロロプロピルアミンの残存量が1%未満となっていた(以上、工程(A))。
反応液を室温まで放冷し一晩攪拌した後に、−10℃まで冷却して1.5時間攪拌したところ、S−(3−アミノプロピル)チオ硫酸を主に含有する結晶が析出した(以上、工程(B))。得られた混合物を濾過することにより、上記の結晶を取得し、冷水60mL、メタノール40mLで順次洗浄した後、減圧下、50℃で乾燥させた(以上、工程(C))。
結晶の取得量は108.1gであった。得られた結晶中の塩化物イオン濃度をイオンクロマトグラフィーにより測定したところ、0.08%(塩化ナトリウムとして0.13重量%)であった。S−(3−アミノプロピル)チオ硫酸の取得率:81.9%
Example 3
100 g (0.77 mol) of 3-chloropropylamine hydrochloride was charged into a nitrogen-substituted reaction vessel, and 200 mL of water was added to dissolve 3-chloropropylamine hydrochloride. After adding 200.4 g (0.81 mol) of sodium thiosulfate pentahydrate at room temperature, the solution therein was stirred while heating the reaction vessel at a bath temperature of 70 ° C. When 1 H-NMR was measured after stirring at a bath temperature of 70 ° C. for 7 hours, the residual amount of 3-chloropropylamine was less than 1% (step (A)).
The reaction solution was allowed to cool to room temperature and stirred overnight, then cooled to −10 ° C. and stirred for 1.5 hours. As a result, crystals mainly containing S- (3-aminopropyl) thiosulfuric acid were precipitated (above). Step (B)). The obtained mixture was filtered to obtain the above crystals, washed sequentially with 60 mL of cold water and 40 mL of methanol, and then dried at 50 ° C. under reduced pressure (step (C) above).
The obtained amount of crystals was 108.1 g. When the chloride ion concentration in the obtained crystal was measured by ion chromatography, it was 0.08% (0.13% by weight as sodium chloride). Acquisition rate of S- (3-aminopropyl) thiosulfuric acid: 81.9%

実施例5
実施例3において、水の使用量を表1記載の量とし、工程(B)の冷却温度を表1記載の温度とした以外は実施例3と同様にして、S−(3−アミノプロピル)チオ硫酸を主に含有する結晶を取得した。結果を実施例3とともに表1に示す。室温は、約20℃〜約25℃である。
Example 5
In Example 3, S- (3-aminopropyl) was used in the same manner as in Example 3 except that the amount of water used was the amount described in Table 1, and the cooling temperature in step (B) was the temperature described in Table 1. Crystals mainly containing thiosulfuric acid were obtained. The results are shown in Table 1 together with Example 3. The room temperature is about 20 ° C to about 25 ° C.

Figure 2012046502
Figure 2012046502

実施例6
窒素置換された反応容器に3−クロロプロピルアミン塩酸塩600g(4.61mol)を仕込み、水1200mLを加えて3−クロロプロピルアミン塩酸塩を溶解させた。得られた水溶液のpHは2.8であった。これを60〜70℃に保温し、そこにチオ硫酸ナトリウム五水和物1200g(4.84mol)を加えた。用いた水の重量は、仕込み水1200gとチオ硫酸ナトリウム五水和物に含まれる水432gとで、合計1632gであった。この時点で水溶液のpHは5〜5.5であった。反応容器を浴温80℃で加熱しながら、その中の溶液を4時間攪拌した。この段階では結晶の析出は見られなかった(以上、工程(A))。得られた反応混合物を放冷したところ、内温45℃辺りから結晶が析出し始めた。その後、得られた混合物を室温で一晩攪拌した。この時点で液体のpHは2.5〜2.8であった。その後、さらに反応容器を氷水で冷却することにより、内温を約5℃としてS−(3−アミノプロピル)チオ硫酸を主に含有する結晶が析出させた(以上、工程(B))。得られた混合物を濾過することにより、上記の結晶を取得し、水100mL、メタノール500mLで順次洗浄した後、乾燥させた(以上、工程(C))。乾燥は、エバポレーター(ダイヤフラムポンプ使用)を用い、浴温50〜55℃で約1時間予備乾燥させた後、真空ポンプで4時間乾燥させることにより実施した。
結晶の取得量は627.9gであった。得られた結晶中の塩化物イオン濃度をイオンクロマトグラフィーにより測定したところ、0.02%(塩化ナトリウムとして0.03%)であった。また、結晶中の水分量を水分気化−電量滴定法により測定したところ、0.01%であった。S−(3−アミノプロピル)チオ硫酸の取得率:79.4%
Example 6
The reaction vessel purged with nitrogen was charged with 600 g (4.61 mol) of 3-chloropropylamine hydrochloride, and 1200 mL of water was added to dissolve 3-chloropropylamine hydrochloride. The pH of the obtained aqueous solution was 2.8. This was kept at 60 to 70 ° C., and 1200 g (4.84 mol) of sodium thiosulfate pentahydrate was added thereto. The weight of water used was 1,632 g in total, with 1200 g of charged water and 432 g of water contained in sodium thiosulfate pentahydrate. At this point, the pH of the aqueous solution was 5 to 5.5. While the reaction vessel was heated at a bath temperature of 80 ° C., the solution therein was stirred for 4 hours. At this stage, no precipitation of crystals was observed (step (A) above). When the obtained reaction mixture was allowed to cool, crystals began to precipitate from an internal temperature of around 45 ° C. The resulting mixture was then stirred overnight at room temperature. At this point, the pH of the liquid was 2.5 to 2.8. Thereafter, the reaction vessel was further cooled with ice water to precipitate crystals mainly containing S- (3-aminopropyl) thiosulfuric acid at an internal temperature of about 5 ° C. (step (B)). The obtained mixture was filtered to obtain the above crystals, washed successively with 100 mL of water and 500 mL of methanol, and then dried (step (C) above). Drying was carried out by using an evaporator (using a diaphragm pump) and predrying at a bath temperature of 50 to 55 ° C. for about 1 hour and then drying with a vacuum pump for 4 hours.
The amount of crystals obtained was 627.9 g. When the chloride ion concentration in the obtained crystal was measured by ion chromatography, it was 0.02% (0.03% as sodium chloride). Moreover, it was 0.01% when the moisture content in a crystal | crystallization was measured by the moisture vaporization-coulometric titration method. Acquisition rate of S- (3-aminopropyl) thiosulfuric acid: 79.4%

実施例7
窒素置換された反応容器に3−クロロプロピルアミン塩酸塩580g(4.47mol)を仕込み、水1048mLを加えて3−クロロプロピルアミン塩酸塩を溶解させた。これを60〜70℃に保温し、そこにチオ硫酸ナトリウム五水和物1164g(4.69mol)を加えた。用いた水の重量は、仕込み水1048gとチオ硫酸ナトリウム五水和物に含まれる水422gとで、合計1470gであった。反応容器を浴温80℃で加熱しながら、その中の溶液を4時間攪拌した。約2時間経過時点で少量の結晶が析出していた(以上、工程(A))。得られた反応混合物を放冷し、得られた混合物を室温で一晩攪拌した(以上、工程(B))。得られた混合物を濾過することにより、上記の結晶を取得し、水100mL、メタノール500mLで順次洗浄した後、乾燥させた(以上、工程(C))。乾燥は、エバポレーター(ダイヤフラムポンプ使用)を用い、浴温50〜55℃で約1時間予備乾燥させた後、真空ポンプで4時間乾燥させることにより実施した。
結晶の取得量は556.6gであった。得られた結晶中の塩化物イオン濃度をイオンクロマトグラフィーにより測定したところ、0.88%(塩化ナトリウムとして1.45%)であった。また、結晶中の水分量を水分気化−電量滴定法により測定したところ、0.02%であった。S−(3−アミノプロピル)チオ硫酸の取得率:71.7%
Example 7
Into a nitrogen-substituted reaction vessel, 580 g (4.47 mol) of 3-chloropropylamine hydrochloride was charged, and 1048 mL of water was added to dissolve 3-chloropropylamine hydrochloride. This was kept at 60 to 70 ° C., and 1164 g (4.69 mol) of sodium thiosulfate pentahydrate was added thereto. The weight of water used was 1,470 g in total, with 1048 g of charged water and 422 g of water contained in sodium thiosulfate pentahydrate. While the reaction vessel was heated at a bath temperature of 80 ° C., the solution therein was stirred for 4 hours. A small amount of crystals was precipitated when about 2 hours passed (step (A)). The resulting reaction mixture was allowed to cool, and the resulting mixture was stirred overnight at room temperature (step (B) above). The obtained mixture was filtered to obtain the above crystals, washed successively with 100 mL of water and 500 mL of methanol, and then dried (step (C) above). Drying was carried out by using an evaporator (using a diaphragm pump) and predrying at a bath temperature of 50 to 55 ° C. for about 1 hour and then drying with a vacuum pump for 4 hours.
The amount of crystals obtained was 556.6 g. When the chloride ion concentration in the obtained crystal was measured by ion chromatography, it was 0.88% (1.45% as sodium chloride). Moreover, it was 0.02% when the moisture content in a crystal | crystallization was measured by the moisture vaporization-coulometric titration method. Acquisition rate of S- (3-aminopropyl) thiosulfuric acid: 71.7%

本発明のアミノアルキルチオ硫酸化合物の製造方法は、工業的規模での製造に好適である。   The method for producing an aminoalkylthiosulfuric acid compound of the present invention is suitable for production on an industrial scale.

Claims (4)

下記工程(A)〜(C)を含むことを特徴とする式(1)
Figure 2012046502
(式中、R及びRはそれぞれ独立に水素原子又は炭素数1〜6のアルキル基を表すか、RとRが一緒になって炭素数2〜9のポリメチレン基を表す。nは2〜9の整数を表す。)
で示されるアミノアルキルチオ硫酸化合物の製造方法。
(A):式(2)
Figure 2012046502
(式中、R、R及びnはそれぞれ上記と同じ意味を表す。)
で示されるクロロアルキルアミン化合物の塩酸塩とチオ硫酸のアルカリ金属塩とを、上記式(2)で示されるクロロアルキルアミン化合物の塩酸塩1重量部に対して2〜6重量部の水の存在下、50〜100℃で反応させる工程
(B):工程(A)で得られた反応混合物の温度を−15℃以上50℃未満に調整し、上記式(1)で示されるアミノアルキルチオ硫酸化合物を含有する固体とアルカリ金属塩化物を含有する液体との混合物を得る工程
(C):工程(B)で得られた混合物から上記式(1)で示されるアミノアルキルチオ硫酸化合物を含有する固体とアルカリ金属塩化物を含有する液体とを分離し、固体としてアミノアルキルチオ硫酸化合物を取得する工程
Formula (1) characterized by including following process (A)-(C)
Figure 2012046502
(In the formula, R 1 and R 2 each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, or R 1 and R 2 together represent a polymethylene group having 2 to 9 carbon atoms. N Represents an integer of 2 to 9.)
The manufacturing method of the aminoalkyl thiosulfuric acid compound shown by these.
(A): Formula (2)
Figure 2012046502
(In the formula, R 1 , R 2 and n each have the same meaning as described above.)
The presence of 2 to 6 parts by weight of water with respect to 1 part by weight of the chloroalkylamine compound hydrochloride represented by the above formula (2) Step (B) of reacting at 50 to 100 ° C. below: The temperature of the reaction mixture obtained in Step (A) is adjusted to −15 ° C. or higher and lower than 50 ° C., and the aminoalkylthiosulfuric acid compound represented by the above formula (1) Step (C) for obtaining a mixture of a solid containing a liquid and a liquid containing an alkali metal chloride: A solid containing an aminoalkylthiosulfuric acid compound represented by the above formula (1) from the mixture obtained in Step (B); Separating liquid containing alkali metal chloride to obtain aminoalkylthiosulfuric acid compound as solid
工程(A)における水の量が、上記式(2)で示されるクロロアルキルアミン化合物の塩酸塩1重量部に対して2.5〜4重量部である請求項1記載の製造方法。 The production method according to claim 1, wherein the amount of water in the step (A) is 2.5 to 4 parts by weight with respect to 1 part by weight of the hydrochloride of the chloroalkylamine compound represented by the formula (2). 工程(A)におけるチオ硫酸のアルカリ金属塩の使用量が、上記式(2)で示されるクロロアルキルアミン化合物の塩酸塩1.0モルに対して、0.9〜1.5モルである請求項1又は2記載の製造方法。 The amount of the alkali metal salt of thiosulfuric acid used in step (A) is 0.9 to 1.5 mol with respect to 1.0 mol of the hydrochloride of the chloroalkylamine compound represented by the above formula (2). Item 3. The method according to Item 1 or 2. 工程(B)における反応混合物の温度が−15℃以上30℃以下である請求項1〜3のいずれか一項記載の製造方法。 The temperature of the reaction mixture in a process (B) is -15 degreeC or more and 30 degrees C or less, The manufacturing method as described in any one of Claims 1-3.
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