• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A process for the chemical catalytic hydrolysis of an alpha -aminonitrile or of one of the salts thereof, characterized in that an aqueous solution containing at least one carbonyl derivative is reacted with the said alpha -amine nitrile or with one of the salts thereof in the presence of hydroxide ions.
    公开号:SU1220568A3
    申请号:SU792799652
    申请日:1979-08-03
    公开日:1986-03-23
    发明作者:Коммейра Огюст；Тайад Жак；Мион Луи；Паскаль Робер；Ласпера Моник；Руссе Ален
    申请人:Ажанс Насьональ Де Валоризасьон Де Ля Решерш (Фирма)；
    IPC主号:
    专利说明:


    The invention relates to an improved process for the preparation of ct-amino amides, which can be used for the synthesis of oi-amino acids, which are widely used in the medical, food and perfume industry.
    The purpose of the invention is to increase the yield of the target product.
    The starting compounds for the production of about -aminoamides are the corresponding oi-aminonitriles. and α-aminonitriles are prepared in situ by several methods: by reacting cyanhydrin a with ammonia or by reacting aldehyde, hydrocyanic acid and ammonia, or by reacting aldehyde, alkali metal cyanide, ammonia and an ammonium salt. The yield of ci-aminonitriles is almost quantitative.
    The hydrolysis of the α-aminonitriles is carried out in the presence of acetone, taken in an amount of 1-5 mol per 1 mol of s-aminonitrile. In the case when the number of mole of acetone is less than 1 mole per mole of oi-aminonitrile, the hydration reaction is significantly slowed down and the initial nitrile is destroyed.
    When using acetone in an amount greater than 5 mol per 1 mol of O4-aminonitrile, side reactions occur with the formation, in particular, of 4-imidazolidinone.
    Example 1. Getting amide ":, - alanine.
    To a solution of 0.53 g of hydrochloric o6-aminopropionitrile (5–10 mol) in 5 ml of water was added 0.3 g of acetone (5–10 mol) and 0.6 ml to N sodium hydroxide. After five minutes of reaction, the NMR determination of this rast, the thief, shows the quantitative conversion of oi-aminonitrile to oi-amino-amide. The latter is isolated by neutralization of the solution, evaporation and subsequent passage of the residue through an ion exchange resin column with a yield of 95%.
    Example 2. Getting amide O6-alanine
    0.355 g (5-10 mol) of lactonitrile is added to 5 ml of a 0.1 molar solution of ammonium chloride in 10 N ammonium hydroxide. After heating for half an hour at 40 ° C, 0.3 g of acetone (mol) and 0.1 ml of 10 N are added in a closed flask.
    205682
    caustic soda. The determination of the NMR solution shows the presence of 95% o-aminopionamide, which is isolated by the described method. Yield 92%.
    5 Example 3. Obtaining methionine amide
    Add 0.65 g of o-oxy-y-methyl-mercaptobutyronitrile () to 5 ml of a 0.2 molar solution of ammonium chloride and a 0.1 molar solution of potassium cyanide in 10 N ammonium hydroxide. The mixture is heated under stirring with a magnetic stirrer for 1.5 hours in a closed
    15 flask. Then 0.3 g of acetone (5.10 mol) and 0.1 ml of 10 N sodium hydroxide are added and the flask remains closed. With stirring at room temperature for 10 minutes.
    20 The mixture is neutralized and treated as described. Yield 95%.
    Example 4 „Preparation of amide of o-alanine
    0.422 g of acetaldehyde is added.
    (About 1 mL mol) to 10 ml of a 1.2 molar solution of ammonium chloride and a 1.1 molar solution of potassium cyanide in 10 N ammonium hydroxide. The mixture is kept at 40 ° C for half an hour in a closed flask. Then 0.6 g (10 mol) of acetone is added, as well as 0.1 mo of 10 N sodium hydroxide is added. After ten minutes, the reaction mixture is neutralized and treated as
    E1G is described for the amide. Yield 91%.
    Example 5. Obtaining methionine amide.
    To 5 ml of 0.65 molar solution
    40 ammonium chloride and a 0.55 molar solution of potassium cyanide in 10 N ammonium hydroxide added 0.254 g (about 2) of methyl mercaptopropionaldehyde. The mixture is heated
     at 40 ° C with stirring in a closed conical flask for 1.5 hours. Then 0.12 g of acetone and 0.05 ml of 10 N sodium hydroxide are added. The mixture is kept at room temperature for another 10 minutes, then neutralized and treated as described. The yield of amide released is 93%.
    Example 6. Getting amide
    55 oi-alanine.
    0.41 g of acetaldehyde (about 10 mol) is added to 10 ml of a 1.2 molar solution of ammonium chloride
    and a 1.1 molar solution of potassium cyanide in 10 N ammonium hydroxide.
    The mixture was sealed in a sealed vial at 40 ° C. for half an hour. Thus, about 10 mol of L-aminopropionitrile was obtained. Then 0.2 g of acetone (0.3 x X) is added, as well as 0.1 ml of 10 N NaOH. After 30 minutes, the reaction mixture is neutralized and treated by the method described. Yield: 78%
    Example 7. Getting amnts Dt-alanine.
    Analogously to Example 6, approximately 10 mol of l-aminopropionitrile is obtained.
    Then 1 g of acetone (5 x X) is added, as well as 0.1 ml of 10 N-ro NaOH. After 10 min, the reaction mixture is neutralized and treated in the manner described. Yield 90%.
    Example 8o Preparation of oi-alanine amide.
    Analogously to Example 6, 1 approximate 10 mol of ot-aminopropionitol is obtained. 0.6 g of acetone () is added, as well as 0.5 ml of a 0.1 N solution of NaOH (0.5 "10 mol). After 20 min, the reaction mixture was treated with 1UT as in Example 1. Yield 85%.
    Editor A.Vorovich
    Compiled by M. Bibikova
    Tehred N.Vonkalo Corrector T.Kolb
    1337/62 Circulation 379 Subscription
    VNIIPI USSR State Committee
    for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5
    Branch PSh1 Patent, Uzhgorod, Proektna St., 4
    2205684
    Example 9 Preparation of ci-alanine amide
    Analogously to Example 6, approximately 10 moles of “i-aminopropionite-5 is obtained. Add 0.6 g of acetone.
    (), as well as 1 ml of 10 N NaOH solution (mol) o After 5 min, the reaction mixture is treated as in Example 1, Yield 80%. to Example 10o Preparation of phenylalanine amide.
    1.20 g of phenylacetaldehyde (Yu mol) was added to 10 ml of a 1.2 molar solution of ammonium chloride 5 and a 1.1 molar solution of potassium cyanide in 10 N ammonium hydroxide (8 ml of 10 N and 2 ml of ethanol).
    The mixture was incubated for 3 h in a closed vessel at. Then 20 g of 0.6 g of acetone (10 mol) and 0.1 ml of 10 N NaOH are added and the reaction mixture is kept at a temperature slightly lower than room temperature for 2 hours.
    After neutralization and extraction in chloroform, phenylalanine amide is obtained in a yield of 85%.
    Thus, the proposed method allows to significantly increase the yield of N-iinoamcds.
    权利要求:
    Claims (1)
    [1]
    METHOD FOR PRODUCING w-AMINOAMIDES OF THE GENERAL FORMULA
    R-CH-C0NH 2 nh 2 where R is methyl, benzyl or a group
    CH 3 -S-CH 2 -CH Z -, water-alkaline hydrolysis of the corresponding α-aminonitrile, characterized in that, in order to increase the yield of the target product, hydrolysis is carried out in the presence of acetone taken in an amount of 1-5 mol per 1 mol ¢ 4-aminonitrile obtained directly in the reaction zone at a molar ratio of sodium or ammonium hydroxide and oh-aminonitrile 0.05-0.3: 1, followed by extraction of the target product.
    SU <. „1220568>
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    同族专利:
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    引用文献:
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    GB908735A|1959-12-30|1962-10-24|Ajinomoto Kk|Process for synthesising amino acids|
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    法律状态:
    优先权:
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