JP2004250353A - METHOD FOR PRODUCING beta-ALKOXYPROPIONAMIDE COMPOUNDS - Google Patents

METHOD FOR PRODUCING beta-ALKOXYPROPIONAMIDE COMPOUNDS Download PDF

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JP2004250353A
JP2004250353A JP2003040537A JP2003040537A JP2004250353A JP 2004250353 A JP2004250353 A JP 2004250353A JP 2003040537 A JP2003040537 A JP 2003040537A JP 2003040537 A JP2003040537 A JP 2003040537A JP 2004250353 A JP2004250353 A JP 2004250353A
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alkoxypropionamides
producing
monohydric alcohol
reaction
carbon atoms
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JP4377594B2 (en
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Shigeru Matsuo
松尾  茂
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Idemitsu Petrochemical Co Ltd
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Idemitsu Petrochemical Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing a β-alkoxypropionamide compound, by which the β-alkoxypropionamide compound having excellent performances as a solvent, a cleanser, or the like, and capable of being easily post-treated and purified after the reaction, is obtained by the short time reaction under mild conditions. <P>SOLUTION: This method for producing the β-alkoxypropionamide compound is characterized by reacting an acrylamide compound with a 1 to 4C aliphatic monohydric alcohol in the presence of a basic catalyst. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、β−アルコキシプロピオンアミド類の製造方法に関する。さらに詳しくは、本発明は、アクリル酸アミド類と低級一価アルコールをマイルドな条件で反応させることにより、β−アルコキシプロピオンアミド類を効率よく製造する方法に関する。
本発明で製造されるβ−アルコキシプロピオンアミド類は、特に溶剤,洗浄剤などに使用できる有用なものである。
【0002】
【従来の技術】
一般に、アミド系有機溶剤は、優れた溶解力と、水に容易に溶解する性質を有することから、水によるリンスが可能であり、溶剤又は洗浄剤として望ましい性能を有している。また、最近では、ハロゲン系溶剤がオゾン層を破壊するなど環境汚染をもたらすおそれがあることや毒性が大きいことから、アミド系溶剤は、従来のハロゲン系溶剤に代替される傾向にある。
このようなアミド系溶剤としては、例えばホルムアミド、モノメチルホルムアミド、ジメチルホルムアミド、モノエチルホルムアミド、ジエチルホルムアミド、アセトアミド、N、N−ジメチルホルムアミドなどが知られている。
【0003】
しかし、アミド系溶剤についても、溶解力や洗浄力に優れるとともに、さらに沸点が高くて取り扱い易く、しかもその製造が容易な化合物が望まれる。
一方、特許文献1には、重合性モノマーとして用いるα,β−オレフィン系不飽和モノカルボン酸のN,N−ジアルキルアミド類の製造法において、中間体としてβ−アルコキシ−N,N−ジアルキルプロピオンアミド類が記載されている。この中間体は、β−アルコキシプロピオン酸アルキルエステル類とジアルキルアミン類とを反応させてアミド化したものである。その反応は、例えばβ−メトキシ−N,N−ジメチルプロピオンアミドを製造する場合は、シールされた加圧ボンベ中で、しかも24〜40時間と長時間を要するものであり、これは経済的には不利な方法である。
【0004】
【特許文献1】
特開昭49−66623号公報(第11,12頁)
【0005】
【発明が解決しようとする課題】
このような状況下で、本発明は、アミド系溶剤の一つとして、優れた溶解力を有するβ−アルコキシプロピオンアミド類を、マイルドな条件で短時間の反応で製造でき、しかも、反応後の後処理、精製が容易である製造方法を提供することを目的とするものである。
【0006】
【課題を解決するための手段】
本発明者らは、上記課題を解決するために鋭意研究を重ねた結果、β−置換された低級アルコキシプロピオンアミド類が溶剤や洗浄剤として極めて有用であることを知見するとともに、その製造方法を工夫することにより前記の課題を達成できることを見出した。
すなわち、本発明は、
(1)塩基性触媒の存在下、アクリル酸アミド類と炭素数1〜4の脂肪族一価アルコールを反応させることを特徴とするβ−アルコキシプロピオンアミド類の製造方法、
(2)炭素数1〜4の脂肪族一価アルコールがメタノールである上記(1)のβ−アルコキシプロピオンアミド類の製造方法、
(3)アクリル酸アミド類が、一般式(I)
【化2】

Figure 2004250353
(式中、R及びRはそれぞれ水素原子,又は炭素数1〜6のエーテル結合を有してもよい一価の炭化水素基を示し、それらは互いに同一であっても異なっていてもよく、さらに互いに結合して環構造を形成してもよい。)
で表される化合物である上記(1)、(2)のβ−アルコキシプロピオンアミド類の製造方法、
(4)アクリル酸アミド類が、アクリルアミド、N−メチルアクリルアミド、N,N−ジメチルアクリルアミド、N−エチルアクリルアミド、N,N−ジエチルアクリルアミド、又は4−アクリロイルモルホリンである上記(3)のβ−アルコキシプロピオンアミド類の製造方法、
(5)塩基性触媒が、ナトリウムメトキシド及び/又はカリウムメトキシドである上記(1)ないし(4)のβ−アルコキシプロピオンアミド類の製造方法、
(6)塩基性触媒の使用量が、アクリル酸アミド類1モルに対して0.0001〜0.05モルの割合である上記(1)ないし(5)のβ−アルコキシプロピオンアミド類の製造方法、
(7)アクリル酸アミド類と炭素数1〜4の脂肪族一価アルコールとの反応を、常圧、温度10〜100℃で行う上記(1)〜(6)のβ−アルコキシプロピオンアミド類の製造方法、
を提供するものである。
【0007】
【発明の実施の形態】
本発明におけるβ−アルコキシプロピオンアミド類は、原料としてのアクリル酸アミド類と炭素数1〜4の脂肪族一価アルコールを反応させることにより得られる。ここで、アクリル酸アミド類としては、好ましくは下記一般式(I)で表される化合物である。
【0008】
【化3】
Figure 2004250353
【0009】
上記一般式(I)において、R及びRは、それぞれ水素原子,又は炭素数1〜6のエーテル結合を有してもよい一価の炭化水素基を示す。ここで、炭化水素基としては直鎖状,分岐状のいずれであってもよいが飽和炭化水素基が好ましい。その例としては、メチル基,エチル基,各種プロピル基,各種ブチル基,メトキシメチル基,メトキシエチル基,エトキシエチル基などが挙げられる。そして、R及びRは互いに同一であっても異なっていてもよく、さらに互いに結合して環構造を形成してもよい。この環構造は、窒素をヘテロ原子とする複素環構造であってもよく、また、窒素原子と酸素原子をヘテロ原子とする複素環構造であってもよい。この複素環構造を有する基としては、例えば1−ピロリジニル基、ピペジリノ基、モルホリノ基などを挙げることができる。
このようなアクリル酸アミドは、具体的には、アクリルアミド、N−メチルアクリルアミド、N,N−ジメチルアクリルアミド、N−エチルアクリルアミド、N,N−ジエチルアクリルアミド、N−プロピルアクリルアミド、N,N−ジプロピルアクリルアミド、N−ブチルアクリルアミド、N,N−ジブチルアクリルアミド、1−アクリロイルピロリジン、1−アクリロイルピペリジン、4−アクリロイルモルホリンなどが挙げられるが、これらの中で特にアクリルアミド、N−メチルアクリルアミド、N,N−ジメチルアクリルアミド、N−エチルアクリルアミド、N,N−ジエチルアクリルアミド,及び4−アクリロイルモルホリンが好ましい。
【0010】
本発明におけるβ−アルコキシプロピオンアミド類のもう一つの原料には、炭素数1〜4の脂肪族一価アルコール(以下、低級一価アルコールと称すことがある。)が用いられる。この低級一価アルコールは、直鎖状、分岐状のいずれであってもよく、具体的にはメタノール、エタノール、n−プロパノール、n−ブタノールを挙げることができるが、これらの中でメタノール及びエタノールが好ましく、特にメタノールが好ましい。
本発明におけるβ−アルコキシプロピオンアミド類が、溶剤や洗浄剤などとして、混合物の形態で用いられる場合には、反応において混合物を製造してもよい。この場合、原料の前記アクリル酸アミド類を二種以上組み合わせて用いてもよいし、前記低級一価アルコールを二種以上組み合わせて用いてもよく、またその両方であってもよい。
【0011】
前記アクリル酸アミド類と前記低級一価アルコールとの使用割合は、低級一価アルコールを化学量論的量又はそれよりも過剰に用いることが好ましいが、あまり過剰に用いると経済性の面で不利となるので、一般的には、アクリル酸アミド類1モルに対して、低級一価アルコールが1.0〜3モル、好ましくは1.0〜2モルの範囲で用いられる。
本発明の方法においては、前記アクリル酸アミド類と、低級一価アルコールとの反応は、塩基性触媒の存在下に行われる。この塩基性触媒としては、特に制限はなく、無機塩基、有機塩基のいずれも用いることができる。無機塩基としては、例えばナトリウム、カリウム、リチウムなどのアルカリ金属の水酸化物等が挙げられ、有機塩基としては、例えば上記アルカリ金属のアルコキシド、第三級アミン、ピリジン、4−ジメチルアミノピリジン、1,8−ジアザビシクロ(5,4,0)ウンデセン−7などが挙げられる。これらの中でアルカリ金属のアルコキシドが好ましく、特にナトリウムメトキシド及びカリウムメトキシドが好適である。
【0012】
本発明においては、前記塩基性触媒は、一種を単独で用いてもよく、二種以上を組み合わせて用いてもよい。また、その使用量は特に制限はなく、原料の種類などに応じて適宜選定されるが、一般的には、アクリル酸アミド類1モルに対して、0.0001〜0.05モルの範囲好ましくは0.005〜0.02モルの範囲で選定される。
本発明の方法を反応式で示すと、次のとおりである。
【0013】
【化4】
Figure 2004250353
【0014】
(式中、Rは炭素数1〜4のアルキル基を示し、R及びRは前記と同じである。)
すなわち、一般式(I)で表されるアクリル酸アミド類と一般式(II)で表される低級一価アルコールとを、塩基性触媒の存在下に反応させることにより、一般式(III)で表されるβ−アルコキシプロピオンアミド類が生成する。
反応条件としては、使用する原料や触媒の種類などに応じて適宜選定されるが、反応温度は通常10〜100℃の範囲で選定される。低級一価アルコールとしてメタノールを用い、かつ塩基性触媒としてアルカリ金属のアルコキシドを用いる場合には、反応温度は10〜50℃が好ましく、さらに25〜40℃の範囲から選択することが好ましい。あまり高温では収率が低下する場合があり、あまり低温では反応速度が低下して実用的でない。また、反応圧力は、一般的に常圧で反応が容易に進行するので経済的に有利である。反応時間は、使用する原料や触媒の種類、反応温度などに左右され、一概に決めることはできないが、通常1〜10時間で充分であり、好ましくは2〜5時間である。
【0015】
低級一価アルコールとしてメタノールを用いる場合には、生成するβ−アルコキシプロピオンアミド類としては、具体的には、β−メトキシプロピオンアミド、β−メトキシ−N−メチルプロピオンアミド、β−メトキシ−N,N−ジメチルプロピオンアミド、β−メトキシ−N−エチルプロピオンアミド、β−メトキシ−N,N−ジエチルプロピオンアミド、β−メトキシ−(N−プロピル)プロピオンアミド、β−メトキシ−(N,N−ジプロピル)プロピオンアミド、β−メトキシ−N−ブチルプロピオンアミド、β−メトキシ−N,N−ジブチルプロピオンアミド、1−(β−メトキシプロピオニル)ピロリジン、1−(β−メトキシプロピオニル)ピペリジン、4−(β−メトキシプロピオニル)モルホリンなどが好ましく挙げられる。
また、低級一価アルコールとして、他のアルコールを用いた場合には、前記β−メトキシプロピオンアミド類におけるメトキシ基が、使用するアルコール由来のアルコキシル基に置換された化合物を挙げることができる。
生成したβ−アルコキシプロピオンアミド類は、反応終了後に酢酸などの酸で中和した後、蒸留などの手段により目的物である生成物を分離することにより、ほぼ100%純度の製品を容易に得ることができる。
このように、本発明においては、アミド系溶剤として優れた性能を有するβ−アルコキシプロピオンアミド類を、マイルドな条件で短時間に反応させることができ、しかも反応後の後処理、精製が容易な方法で製造することができる。
【0016】
【実施例】
次に、本発明を実施例によりさらに詳細に説明するが、本発明はこれらの例によってなんら限定されるものではない。
実施例1
攪拌装置、熱電対および窒素ガス導入管を備えた500ミリリットル三つ口フラスコに、N,N−ジメチルアクリルアミド198.0g(2モル)、メタノール96g(3モル)を入れた。これに、窒素ガスを導入し、攪拌しながら、室温でナトリウムメトキシド1.08g(0.02モル)を含むメタノール溶液20ミリリットルを加えた。徐々に溶液の温度が上昇し、反応開始後30分で反応温度が38℃に達した。水浴を使って反応温度を30〜40℃に調節した。5時間の後に反応液の発熱はなくなり、酢酸で中和した。未反応物を留去した後、133Pa,58℃で留出した生成物を得た。この生成物は、核磁気共鳴スペクトル(H−NMRおよび13C−NMR)による解析結果から、β−メトキシ−N,N−ジメチルプロピオンアミドであり、収量は199g(収率76%)であった。
【0017】
実施例2
攪拌装置、熱電対および窒素ガス導入管を備えた200ミリリットル三つ口フラスコに、N,N−ジメチルアクリルアミド49.5g(0.5モル)、メタノール20g(0.63モル)を入れた。これに、窒素ガスを導入し、攪拌しながら、室温でナトリウムメトキシド0.5g(0.009モル)を含むメタノール溶液10ミリリットルを反応液の温度が30〜40℃になるようにゆっくりと調節しながら滴下した。4時間の反応の後に、酢酸で中和し、未反応物を留去して後、実施例1と同様にして生成物を得た。この生成物は、β−メトキシ−N,N−ジメチルプロピオンアミドであり、収量は57.6g(収率88%)であった。
【0018】
実施例3
攪拌装置、熱電対および窒素ガス導入管を備えた500ミリリットル三つ口フラスコに、N,N−ジエチルアクリルアミド159g(1.25モル)、メタノール40g(1.25モル)を入れた。これに、窒素ガスを導入し、攪拌しながら、室温でナトリウムメトキシド1.5g(0.028モル)を含むメタノール溶液20ミリリットルを加えた。水浴を使って反応温度を30〜40℃になるように調節した。4時間後に酢酸で中和を行い、析出した物を濾別し、溶液を蒸留して生成物(133Pa,65℃)を得た。この生成物は、核磁気共鳴スペクトル(H−NMRおよび13C−NMR)による解析結果から、β−メトキシ−N,N−ジエチルプロピオンアミドであり、収量は174g(収率91%)であった。
【0019】
【発明の効果】
本発明の方法によれば、β−アルコキシプロピオンアミド類を、反応条件がマイルドで短時間の反応で得ることができ、しかも反応後の後処理、精製が容易で効率的に製造することができる。
また、本発明で製造されるβ−アルコキシプロピオンアミド類は、溶解力、洗浄力に優れた性能を有しているので、溶剤や洗浄剤として広く適用可能である。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for producing β-alkoxypropionamides. More specifically, the present invention relates to a method for efficiently producing β-alkoxypropionamides by reacting an acrylamide with a lower monohydric alcohol under mild conditions.
The β-alkoxypropionamides produced according to the present invention are useful especially as solvents and detergents.
[0002]
[Prior art]
In general, an amide-based organic solvent has excellent dissolving power and a property of easily dissolving in water, so that it can be rinsed with water and has desirable performance as a solvent or a cleaning agent. Recently, amide solvents tend to be replaced by conventional halogen solvents because halogen solvents may cause environmental pollution such as destruction of the ozone layer and are highly toxic.
As such amide solvents, for example, formamide, monomethylformamide, dimethylformamide, monoethylformamide, diethylformamide, acetamide, N, N-dimethylformamide and the like are known.
[0003]
However, amide-based solvents which are excellent in solubility and detergency, have a higher boiling point, are easy to handle, and are easy to produce are desired.
On the other hand, Patent Document 1 discloses a process for producing N, N-dialkylamides of an α, β-olefin unsaturated monocarboxylic acid used as a polymerizable monomer, wherein β-alkoxy-N, N-dialkylpropion is used as an intermediate. Amides are described. This intermediate is amidated by reacting a β-alkoxypropionic acid alkyl ester with a dialkylamine. The reaction is, for example, in the case of producing β-methoxy-N, N-dimethylpropionamide in a sealed pressurized cylinder and requires a long time of 24 to 40 hours, which is economical. Is a disadvantageous method.
[0004]
[Patent Document 1]
JP-A-49-66623 (pages 11 and 12)
[0005]
[Problems to be solved by the invention]
Under such circumstances, the present invention can produce β-alkoxypropionamides having excellent dissolving power as one of the amide solvents in a short time under mild conditions, and moreover, after the reaction. It is an object of the present invention to provide a production method in which post-treatment and purification are easy.
[0006]
[Means for Solving the Problems]
The present inventors have conducted intensive studies in order to solve the above-mentioned problems, and as a result, have found that β-substituted lower alkoxypropionamides are extremely useful as a solvent or a cleaning agent, and have studied a method for producing the same. It has been found that the above problem can be achieved by devising.
That is, the present invention
(1) a method for producing β-alkoxypropionamides, comprising reacting an acrylamide with an aliphatic monohydric alcohol having 1 to 4 carbon atoms in the presence of a basic catalyst;
(2) the method for producing β-alkoxypropionamides according to (1) above, wherein the aliphatic monohydric alcohol having 1 to 4 carbon atoms is methanol;
(3) Acrylic amides represented by general formula (I)
Embedded image
Figure 2004250353
(Wherein, R 1 and R 2 each represent a hydrogen atom or a monovalent hydrocarbon group having 1 to 6 carbon atoms which may have an ether bond, and they may be the same or different from each other. And may combine with each other to form a ring structure.)
A method for producing the β-alkoxypropionamides of the above (1) and (2), which is a compound represented by the formula:
(4) The β-alkoxy according to (3) above, wherein the acrylamide is acrylamide, N-methylacrylamide, N, N-dimethylacrylamide, N-ethylacrylamide, N, N-diethylacrylamide, or 4-acryloylmorpholine. A method for producing propionamides,
(5) The method for producing β-alkoxypropionamides according to the above (1) to (4), wherein the basic catalyst is sodium methoxide and / or potassium methoxide;
(6) The method for producing β-alkoxypropionamides according to (1) to (5) above, wherein the amount of the basic catalyst used is 0.0001 to 0.05 mol per 1 mol of the acrylamides. ,
(7) The β-alkoxypropionamides of the above (1) to (6), wherein the reaction between the acrylamides and the aliphatic monohydric alcohol having 1 to 4 carbon atoms is carried out at normal pressure and at a temperature of 10 to 100 ° C. Production method,
Is provided.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
The β-alkoxypropionamides in the present invention are obtained by reacting an acrylamide as a raw material with an aliphatic monohydric alcohol having 1 to 4 carbon atoms. Here, the acrylamides are preferably compounds represented by the following general formula (I).
[0008]
Embedded image
Figure 2004250353
[0009]
In the general formula (I), R 1 and R 2 each represent a hydrogen atom or a monovalent hydrocarbon group having 1 to 6 carbon atoms and optionally having an ether bond. Here, the hydrocarbon group may be linear or branched, but is preferably a saturated hydrocarbon group. Examples thereof include a methyl group, an ethyl group, various propyl groups, various butyl groups, a methoxymethyl group, a methoxyethyl group, and an ethoxyethyl group. R 1 and R 2 may be the same or different from each other, and may be further bonded to each other to form a ring structure. This ring structure may be a heterocyclic structure having nitrogen as a hetero atom or a heterocyclic structure having nitrogen and oxygen atoms as hetero atoms. Examples of the group having a heterocyclic structure include a 1-pyrrolidinyl group, a pipezilino group, and a morpholino group.
Specific examples of such acrylamide include acrylamide, N-methylacrylamide, N, N-dimethylacrylamide, N-ethylacrylamide, N, N-diethylacrylamide, N-propylacrylamide, N, N-dipropyl. Examples include acrylamide, N-butylacrylamide, N, N-dibutylacrylamide, 1-acryloylpyrrolidine, 1-acryloylpiperidine, 4-acryloylmorpholine, and among them, acrylamide, N-methylacrylamide, N, N- Dimethylacrylamide, N-ethylacrylamide, N, N-diethylacrylamide, and 4-acryloylmorpholine are preferred.
[0010]
As another raw material of β-alkoxypropionamides in the present invention, an aliphatic monohydric alcohol having 1 to 4 carbon atoms (hereinafter sometimes referred to as a lower monohydric alcohol) is used. The lower monohydric alcohol may be linear or branched, and specific examples thereof include methanol, ethanol, n-propanol, and n-butanol. Is preferable, and methanol is particularly preferable.
When the β-alkoxypropionamides in the present invention are used in the form of a mixture as a solvent or a detergent, the mixture may be produced in the reaction. In this case, two or more of the above-mentioned acrylic acid amides may be used in combination, two or more of the lower monohydric alcohols may be used in combination, or both may be used.
[0011]
The use ratio of the acrylamides and the lower monohydric alcohol is preferably such that the lower monohydric alcohol is used in a stoichiometric amount or in excess thereof. In general, the lower monohydric alcohol is used in an amount of 1.0 to 3 mol, preferably 1.0 to 2 mol, per 1 mol of acrylamides.
In the method of the present invention, the reaction between the acrylamides and the lower monohydric alcohol is performed in the presence of a basic catalyst. The basic catalyst is not particularly limited, and any of an inorganic base and an organic base can be used. Examples of the inorganic base include hydroxides of alkali metals such as sodium, potassium and lithium, and examples of the organic base include alkoxides of the above-mentioned alkali metals, tertiary amines, pyridine, 4-dimethylaminopyridine, and the like. , 8-diazabicyclo (5,4,0) undecene-7 and the like. Of these, alkali metal alkoxides are preferred, and sodium methoxide and potassium methoxide are particularly preferred.
[0012]
In the present invention, one type of the basic catalyst may be used alone, or two or more types may be used in combination. The amount used is not particularly limited and is appropriately selected depending on the type of the raw material and the like, but is generally in the range of 0.0001 to 0.05 mol per 1 mol of the acrylamides. Is selected in the range of 0.005 to 0.02 mol.
The reaction formula of the method of the present invention is as follows.
[0013]
Embedded image
Figure 2004250353
[0014]
(In the formula, R 3 represents an alkyl group having 1 to 4 carbon atoms, and R 1 and R 2 are the same as described above.)
That is, by reacting an acrylamide represented by the general formula (I) with a lower monohydric alcohol represented by the general formula (II) in the presence of a basic catalyst, The indicated β-alkoxypropionamides are formed.
The reaction conditions are appropriately selected according to the type of raw materials and catalyst used, and the reaction temperature is generally selected in the range of 10 to 100 ° C. When methanol is used as the lower monohydric alcohol and an alkali metal alkoxide is used as the basic catalyst, the reaction temperature is preferably from 10 to 50C, and more preferably from 25 to 40C. If the temperature is too high, the yield may decrease, and if the temperature is too low, the reaction rate decreases, which is not practical. The reaction pressure is generally economical because the reaction easily proceeds at normal pressure. The reaction time depends on the type of raw materials and catalyst used, the reaction temperature, and the like, and cannot be unconditionally determined. However, 1 to 10 hours is usually sufficient, and preferably 2 to 5 hours.
[0015]
When methanol is used as the lower monohydric alcohol, the resulting β-alkoxypropionamides specifically include β-methoxypropionamide, β-methoxy-N-methylpropionamide, β-methoxy-N, N-dimethylpropionamide, β-methoxy-N-ethylpropionamide, β-methoxy-N, N-diethylpropionamide, β-methoxy- (N-propyl) propionamide, β-methoxy- (N, N-dipropyl ) Propionamide, β-methoxy-N-butylpropionamide, β-methoxy-N, N-dibutylpropionamide, 1- (β-methoxypropionyl) pyrrolidine, 1- (β-methoxypropionyl) piperidine, 4- (β -Methoxypropionyl) morpholine and the like.
When another alcohol is used as the lower monohydric alcohol, a compound in which the methoxy group in the β-methoxypropionamides is substituted with an alkoxyl group derived from the alcohol to be used can be mentioned.
The produced β-alkoxypropionamides are neutralized with an acid such as acetic acid after the reaction is completed, and then the target product is separated by means such as distillation to easily obtain a product having almost 100% purity. be able to.
As described above, in the present invention, β-alkoxypropionamides having excellent performance as an amide-based solvent can be reacted in a short time under mild conditions, and post-treatment and purification after the reaction are easy. It can be manufactured by a method.
[0016]
【Example】
Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.
Example 1
198.0 g (2 mol) of N, N-dimethylacrylamide and 96 g (3 mol) of methanol were placed in a 500 ml three-necked flask equipped with a stirrer, a thermocouple, and a nitrogen gas inlet tube. To this, nitrogen gas was introduced, and with stirring, 20 ml of a methanol solution containing 1.08 g (0.02 mol) of sodium methoxide was added at room temperature. The temperature of the solution gradually increased, and the reaction temperature reached 38 ° C. 30 minutes after the start of the reaction. The reaction temperature was adjusted to 30-40 ° C. using a water bath. After 5 hours, the reaction was exothermic and neutralized with acetic acid. After distilling off unreacted substances, a product distilled at 133 Pa and 58 ° C. was obtained. The product was β-methoxy-N, N-dimethylpropionamide from the results of analysis by nuclear magnetic resonance spectra ( 1 H-NMR and 13 C-NMR), and the yield was 199 g (76% yield). Was.
[0017]
Example 2
49.5 g (0.5 mol) of N, N-dimethylacrylamide and 20 g (0.63 mol) of methanol were placed in a 200 ml three-neck flask equipped with a stirrer, a thermocouple and a nitrogen gas inlet tube. To this, nitrogen gas was introduced, and while stirring, 10 ml of a methanol solution containing 0.5 g (0.009 mol) of sodium methoxide was slowly adjusted at room temperature such that the temperature of the reaction solution became 30 to 40 ° C. While dripping. After the reaction for 4 hours, the mixture was neutralized with acetic acid and unreacted substances were distilled off, and then a product was obtained in the same manner as in Example 1. This product was β-methoxy-N, N-dimethylpropionamide, and the yield was 57.6 g (88% yield).
[0018]
Example 3
159 g (1.25 mol) of N, N-diethylacrylamide and 40 g (1.25 mol) of methanol were placed in a 500 ml three-necked flask equipped with a stirrer, a thermocouple, and a nitrogen gas inlet tube. To this, nitrogen gas was introduced, and while stirring, 20 ml of a methanol solution containing 1.5 g (0.028 mol) of sodium methoxide was added at room temperature. The reaction temperature was adjusted to 30 to 40 ° C. using a water bath. After 4 hours, the mixture was neutralized with acetic acid, the precipitate was filtered off, and the solution was distilled to obtain a product (133 Pa, 65 ° C.). The product was β-methoxy-N, N-diethylpropionamide from the result of analysis by nuclear magnetic resonance spectra ( 1 H-NMR and 13 C-NMR), and the yield was 174 g (91% yield). Was.
[0019]
【The invention's effect】
According to the method of the present invention, β-alkoxypropionamides can be obtained in a short reaction time under mild reaction conditions, and post-treatment and purification after the reaction can be easily and efficiently produced. .
Further, the β-alkoxypropionamides produced in the present invention have excellent performance in dissolving power and detergency, so that they can be widely applied as solvents and cleaning agents.

Claims (7)

塩基性触媒の存在下、アクリル酸アミド類と炭素数1〜4の脂肪族一価アルコールを反応させることを特徴とするβ−アルコキシプロピオンアミド類の製造方法。A method for producing β-alkoxypropionamides, comprising reacting an acrylamide with an aliphatic monohydric alcohol having 1 to 4 carbon atoms in the presence of a basic catalyst. 炭素数1〜4の脂肪族一価アルコールがメタノールである請求項1記載のβ−アルコキシプロピオンアミド類の製造方法。The method for producing β-alkoxypropionamides according to claim 1, wherein the aliphatic monohydric alcohol having 1 to 4 carbon atoms is methanol. アクリル酸アミド類が、一般式(I)
Figure 2004250353
(式中、R及びRはそれぞれ水素原子,又は炭素数1〜6のエーテル結合を有してもよい一価の炭化水素基を示し、それらは互いに同一であっても異なっていてもよく、さらに互いに結合して環構造を形成してもよい。)
で表される化合物である請求項1又は2記載のβ−アルコキシプロピオンアミド類の製造方法。
Acrylic amides represented by the general formula (I)
Figure 2004250353
(Wherein, R 1 and R 2 each represent a hydrogen atom or a monovalent hydrocarbon group having 1 to 6 carbon atoms which may have an ether bond, and they may be the same or different from each other. And may combine with each other to form a ring structure.)
The method for producing β-alkoxypropionamides according to claim 1 or 2, which is a compound represented by the formula:
アクリル酸アミド類が、アクリルアミド、N−メチルアクリルアミド、N,N−ジメチルアクリルアミド、N−エチルアクリルアミド、N,N−ジエチルアクリルアミド、又は4−アクリロイルモルホリンである請求項3のβ−アルコキシプロピオンアミド類の製造方法。4. The β-alkoxypropionamides according to claim 3, wherein the acrylamides are acrylamide, N-methylacrylamide, N, N-dimethylacrylamide, N-ethylacrylamide, N, N-diethylacrylamide, or 4-acryloylmorpholine. Production method. 塩基性触媒が、ナトリウムメトキシド及び/又はカリウムメトキシドである請求項1ないし4のいずれかに記載のβ−アルコキシプロピオンアミド類の製造方法。The method for producing β-alkoxypropionamides according to any one of claims 1 to 4, wherein the basic catalyst is sodium methoxide and / or potassium methoxide. 塩基性触媒の使用量が、アクリル酸アミド類1モルに対して0.0001〜0.05モルの割合である請求項1ないし5のいずれかに記載のβ−アルコキシプロピオンアミド類の製造方法。The method for producing β-alkoxypropionamides according to any one of claims 1 to 5, wherein the amount of the basic catalyst used is 0.0001 to 0.05 mol relative to 1 mol of the acrylamides. アクリル酸アミド類と炭素数1〜4の脂肪族一価アルコールとの反応を、常圧、温度10〜100℃で行う請求項1ないし6のいずれかに記載のβ−アルコキシプロピオンアミド類の製造方法。The production of β-alkoxypropionamides according to any one of claims 1 to 6, wherein the reaction between the acrylamide and the aliphatic monohydric alcohol having 1 to 4 carbon atoms is carried out at normal pressure and a temperature of 10 to 100 ° C. Method.
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