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    • 1. 发明公开
    • 지방족 α,ω-디니트릴로부터 락탐의 제법
    • 从阿里巴马,狄氏。。。。。。
    • KR1020050047140A
    • 2005-05-19
    • KR1020057007511
    • 1997-05-07
    • 이.아이.듀우판드네모아앤드캄파니
    • 디코시모,로버트팔론,로버트,도날드가바강,존,에드워드허케스,프랭크,에드워드
    • C12N1/20
    • C07D211/76C07C255/19C07C255/23C07D201/08C07D207/26C07D223/10C12N9/78C12N9/88C12P13/002C12P13/02C12P17/10C12R1/01Y02P20/52
    • A process for the preparation of five-membered or six-membered ring lactams from aliphatic alpha,omega-dinitriles has been developed. In the process an aliphatic alpha,omega-dinitrile is first converted to an ammonium salt of an omega-nitrilecarboxylic acid in aqueous solution using a catalyst having an aliphatic nitrilase (EC 3.5.5.7) activity, or a combination of nitrile hydratase (EC 4.2.1.84) and amidase (EC 3.5.1.4) activities. The ammonium salt of the omega-nitrilecarboxylic acid is then converted directly to the corresponding lactam by hydrogenation in aqueous solution, without isolation of the intermediate omega- nitrilecarboxylic acid or omega-aminocarboxylic acid. When the aliphatic alpha,omega-dinitrile is also unsymmetrically substituted at the alpha- carbon atom, the nitrilase produces the omega-nitrilecarboxylic acid ammonium salt resulting from hydrolysis of the omega-nitrile group with greater than 98 % regioselectivity, thereby producing only one of the two possible lactam products during the subsequent hydrogenation. A heat- treatment process to select for desirable regioselective nitrilase or nitrile hydratase activities while destroying undesirable activities is also provided.
    • 已经开发了从脂肪族α,ω-二腈制备五元或六元环内酰胺的方法。 在该方法中,使用具有脂族腈水解酶(EC 3.5.5.7)活性的催化剂或腈水合酶(EC 4.2)的组合,首先将脂族α,ω-二腈转化成ω-氮杂羧酸的铵盐 .1.84)和酰胺酶(EC 3.5.1.4)活性。 然后通过在水溶液中氢化将ω-硝基甲酸的铵盐直接转化成相应的内酰胺,而不分离中间体ω-硝基甲酸或ω-氨基羧酸。 当脂肪族α,ω-二腈在α-碳原子处也不对称取代时,腈水解酶产生由ω-腈基水解产生的ω-氮杂羧酸铵盐,其具有大于98%的区域选择性,从而仅产生 在随后氢化期间两种可能的内酰胺产物。 还提供了在破坏不期望的活性的同时选择期望的区域选择性腈水解酶或腈水合酶活性的热处理方法。
    • 4. 发明公开
    • 지방족α,ω-디니트릴로부터락탐의제법
    • 来自ALIPHATIC ALPHA,OMEGA-DINITRIL的LACTAM的生产方法
    • KR1020000011091A
    • 2000-02-25
    • KR1019980709248
    • 1997-05-07
    • 이.아이.듀우판드네모아앤드캄파니
    • 디코시모,로버트팔론,로버트,도날드가바강,존,에드워드허케스,프랭크,에드워드
    • C07D201/08C12P13/00
    • C07D211/76C07C255/19C07C255/23C07D201/08C07D207/26C07D223/10C12N9/78C12N9/88C12P13/002C12P13/02C12P17/10C12R1/01Y02P20/52
    • PURPOSE: Disadvantages of conventional producing methods of lactam or N-alkyl lactam are the removal of water from the reactant mixture for inducing chemical equilibration to lactam formation because the temperature over 250°C is used to obtain high yield of lactam when water is used as solvent, the control of pH of the reactant mixture for leading the lactam formation, the use of organic solvents which starting materials are nearly insoluble, or the formation of undesired waste steam or unseparated mixture of products. CONSTITUTION: The method of the invention comprises the steps of: 1) converting aliphatic alpha,omega-dinitrile in the aqueous reactant mixture, by contacting with enzyme catalyst, to omega-nitrilecarboxylic ammonium salt; 2) directly converting the omega-nitrilecarboxylic ammonium salt, by contacting aqueous product mixture produced in the step 1) with H and hydrogenation catalyst, to lactam, and 3) recovering 5 element or 6 element cyclic lactam aqueous product mixture from the product produced in the step 2). The method has high local selectivity and can convert aliphatic alpha,omega-dinitrile to corresponding lactam or N-methyl lactam in aqueous solution with high yield. Also byproducts or waste steam are not produced nearly and the recovery of the product is easy.
    • 目的:内酰胺或N-烷基内酰胺的常规生产方法的缺点是从反应物混合物中除去水以诱导内酰胺形成的化学平衡,因为当使用水作为250℃以上的温度以获得高产率的内酰胺 溶剂,控制反应物混合物的pH以引导内酰胺形成,使用起始原料几乎不溶的有机溶剂,或形成不期望的废蒸汽或未分离的产物混合物。 构成:本发明的方法包括以下步骤:1)通过与酶催化剂接触,将含水反应物混合物中的脂族α,ω-二腈转化成ω-硝基羧酸铵盐; 2)通过将步骤1)中产生的含水产物混合物与H和氢化催化剂接触,直接转化成ω-硝基羧酸铵盐至内酰胺,和3)从产生的产物中回收5个元素或6个元素的环状内酰胺水产物混合物 步骤2)。 该方法具有高的局部选择性,可以高产率将脂族α,ω-二腈转化为水溶液中的相应内酰胺或N-甲基内酰胺。 副产物或废蒸汽几乎不产生,产物的回收容易。