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。

    YEAST PRODUCTION CULTURE FOR THE PRODUCTION OF BUTANOL
    8.
    发明申请
    YEAST PRODUCTION CULTURE FOR THE PRODUCTION OF BUTANOL 审中-公开
    用于生产丁醇的YEAST生产文化

    公开(公告)号:US20120149080A1

    公开(公告)日:2012-06-14

    申请号:US13162165

    申请日:2011-06-16

    IPC分类号: C12P7/16 C12N1/19 C12N1/16

    摘要: High cell density cultures of yeast were found to have higher tolerance for butanol in the medium. The high cell density yeast cultures had greater survival and higher glucose utilization than cultures with low cell densities. Production of butanol using yeast in high cell density cultures is thus beneficial for improving butanol production.

    摘要翻译: 发现酵母的高细胞密度培养物对培养基中的丁醇具有较高的耐受性。 高细胞密度酵母培养物比具有低细胞密度的培养物具有更高的存活和更高的葡萄糖利用率。 因此,在高细胞密度培养物中使用酵母生产丁醇因此有利于改善丁醇生产。