Preparation of (E)- and (Z)-2-methyl-2-butenoic acids
    66.
    发明授权
    Preparation of (E)- and (Z)-2-methyl-2-butenoic acids 失效
    (E) - 和(Z)-2-甲基-2-丁烯酸的制备

    公开(公告)号:US07285410B2

    公开(公告)日:2007-10-23

    申请号:US11585036

    申请日:2006-10-23

    摘要: A method has been developed to prepare (E)- and (Z)-2-methyl-2-butenoic acids (2M2BA) from a mixture of (E,Z)-2-methyl-2-butenenitriles (2M2BN) by the regioselective hydrolysis of (E)-2M2BN to (E)-2-methyl-2-butenoic acid (2M2BA) using enzyme catalysts having either a nitrilase activity or a combination of nitrile hydratase and amidase activities. The method provides high yields without significant conversion of (Z)-2M2BN to (Z)-2M2BA. The regioselective hydrolysis of (E)-2M2BN to (E)-2M2BA makes possible the facile separation of (E)-2M2BA from (Z)-2M2BN or (Z)-2-methyl-2-butenamide (2M2BAm), and the subsequent conversion of (Z)-2M2BN or (Z)-2M2BAm to (Z)-2M2BA.

    摘要翻译: 已经开发了一种由(E,Z)-2-甲基-2-丁烯腈(2M 2 BN)的混合物通过区域选择性制备(E) - 和(Z)-2-甲基-2-丁烯酸(2M 2 BA)的方法 使用具有腈水解酶活性或腈水合酶和酰胺酶活性的组合的酶催化剂将(E)-2M2BN水解成(E)-2-甲基-2-丁烯酸(2M2BA)。 该方法提供高产率而不显着转化(Z)-2M2BN至(Z)-2M2BA。 (E)-2M2BN至(E)-2M2BA的区域选择性水解使(E)-2M2BA与(Z)-2M2BN或(Z)-2-甲基-2-丁烯酰胺(2M2BAm)的容易分离成为可能, 随后将(Z)-2M2BN或(Z)-2M2BAm转化为(Z)-2M2BA。

    Method for producing &agr;-hydroxy acid from &agr;-hydroxy nitrile using nitrilase
    69.
    发明授权
    Method for producing &agr;-hydroxy acid from &agr;-hydroxy nitrile using nitrilase 失效
    使用腈水解酶从α-羟基腈生产α-羟基酸的方法

    公开(公告)号:US06383786B1

    公开(公告)日:2002-05-07

    申请号:US09948535

    申请日:2001-09-07

    IPC分类号: C12P740

    CPC分类号: C12P7/42 C12N9/78

    摘要: The present invention relates to a method for producing &agr;-hydroxy acids using an enzyme catalyst having nitrilase activity. More specifically, the invention pertains to use of Acidovorax facilis 72W (ATCC 55746) nitrilase to hydrolyze glycolonitrile to glycolic acid. Glycolonitrile is reacted in an aqueous mixture with a catalyst having Acidovorax facilis 72W nitrilase activity to give glycolic acid selectively, and at high concentration and high yield.

    摘要翻译: 本发明涉及使用具有腈水解酶活性的酶催化剂生产α-羟基酸的方法。 更具体地,本发明涉及使用Acidovorax facilis 72W(ATCC 55746)腈水解酶将乙醇腈水解成乙醇酸。 乙醇腈在含水混合物中与具有酸性酵母72W腈水解酶活性的催化剂反应,选择性地得到乙醇酸,并以高浓度和高产率。

    Production of .omega.-cyanocarboxamides from aliphatic
.alpha.,.omega.-dinitriles using pseudomonas putida-derived biocatalysts
    70.
    发明授权
    Production of .omega.-cyanocarboxamides from aliphatic .alpha.,.omega.-dinitriles using pseudomonas putida-derived biocatalysts 失效
    使用假单胞菌来源的生物催化剂从脂肪族α,ω-二腈生产ω-氰基羧酰胺

    公开(公告)号:US5728556A

    公开(公告)日:1998-03-17

    申请号:US615365

    申请日:1996-03-14

    IPC分类号: C12P13/02

    CPC分类号: C12P13/02 Y10S435/877

    摘要: Applicants have provided methods for obtaining aliphatic omega-cyanocaboximides of Formula I NC--CH(R.sub.1)(CH).sub.n CH(R.sub.2)C(O)NH.sub.2 wherein n=1-8 and R.sub.1 or R.sub.2 are either H or CH.sub.3, from dinitriles of Formula II NC--CH(R.sub.1)(CH).sub.n CH(R.sub.2)CN wherein n=1-8 and R.sub.1 or R.sub.2 are either H or CH.sub.3, using biocatalysts which have regioselective nitrile hydratase activity and which are derived from members of the bacterial species Pseudomonas putida.

    摘要翻译: 申请人提供了获得式I的NC-CH(R 1)(CH)n CH(R 2)C(O)NH 2,n = 1-8和R 1或R 2为H或CH 3的脂肪族ω-氰基邻苯二甲酰亚胺的方法, II NC-CH(R1)(CH)nCH(R2)CN,其中n = 1-8,R1或R2是H或CH3,使用具有区域选择性腈水合酶活性的生物催化剂,其衍生自恶臭假单胞菌(Pseudomonas putida)的成员 。