Preparation of (E)- and (Z)-2-methyl-2-butenoic acids
    4.
    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。

    Production of peracids using an enzyme having perhydrolysis activity
    7.
    发明授权
    Production of peracids using an enzyme having perhydrolysis activity 有权
    使用具有过水解活性的酶生产过酸

    公开(公告)号:US08518675B2

    公开(公告)日:2013-08-27

    申请号:US11943872

    申请日:2007-11-21

    IPC分类号: C12P7/40 C12N9/14

    CPC分类号: C12P7/40 A61L2/186 C12P7/62

    摘要: A process is provided for producing peroxycarboxylic acids from carboxylic acid esters. More specifically, carboxylic acid esters are reacted with an inorganic peroxide, such as hydrogen peroxide, in the presence of an enzyme catalyst having perhydrolysis activity. The present perhydrolase catalysts are classified as members of the carbohydrate esterase family 7 (CE-7) based on the conserved structural features. Further, disinfectant formulations comprising the peracids produced by the processes described herein are provided.

    摘要翻译: 提供了从羧酸酯制备过氧羧酸的方法。 更具体地说,羧酸酯与无机过氧化物如过氧化氢在具有过水解活性的酶催化剂存在下反应。 基于保守的结构特征,本发明的过水解酶催化剂被分类为碳水化合物酯酶家族7(CE-7)的成员。 此外,提供包含通过本文所述方法生产的过酸的消毒剂制剂。

    Preparation of dicarboxylic acid monoesters from cyanocarboxylic acid esters
    10.
    发明授权
    Preparation of dicarboxylic acid monoesters from cyanocarboxylic acid esters 失效
    由氰基羧酸酯制备二羧酸单酯

    公开(公告)号:US06455730B1

    公开(公告)日:2002-09-24

    申请号:US09632419

    申请日:2000-08-04

    IPC分类号: C07C5108

    CPC分类号: C12P7/62 C12N9/78 C12P7/44

    摘要: This invention relates to a process for preparing dicarboxylic acid monoesters from cyanocarboxylic acid esters. More particularly, using the nitrilase from Acidovorax facilis 72W (ATCC 55745) in various forms as an enzyme catalyst, an aliphatic or aromatic cyanocarboxylic acid ester is converted to the corresponding dicarboxylic acid monoester with high chemoselectivity at 100% conversion. An embodiment of the invention also provides a process for obtaining high chemoselectively and high regioselectivity.

    摘要翻译: 本发明涉及由氰基羧酸酯制备二羧酸单酯的方法。 更具体地,使用来自Acidovorax facilis 72W(ATCC 55745)的腈水解酶以各种形式作为酶催化剂,将脂族或芳族氰基羧酸酯在100%转化率下转化为具有高化学选择性的相应的二羧酸单酯。 本发明的实施方案还提供了获得高化学选择性和高区域选择性的方法。