Cell-free synthesis of deacetoxycephalosporin C
    3.
    发明授权
    Cell-free synthesis of deacetoxycephalosporin C 失效
    脱乙酰氧基头孢菌素C的无细胞合成

    公开(公告)号:US4307192A

    公开(公告)日:1981-12-22

    申请号:US223110

    申请日:1981-01-07

    IPC分类号: C12P35/06 C12P37/00 C12P35/00

    摘要: A cell-free process for converting isopenicillin N, .delta.-(L-.alpha.-aminoadipyl)-L-cysteinyl-D-valine (hereinafter "LLD") and 6-substituted derivatives thereof to deacetoxycephalosporin C (DACPC) by the following reaction sequence: ##STR1## is disclosed. In addition to the starting material, the reaction system includes ATP and a fresh extract of Cephalosporium acremonium prepared and used in a manner to preserve the racemase agent or agents necessary for conversion of the isopenicillin N to penicillin N, a necessary intermediate step in the process.

    摘要翻译: 通过以下反应顺序将异青霉素N,δ-(L-α-氨基己二酰基)-L-半胱氨酰-D-缬氨酸(以下称为“LLD”)及其6-取代衍生物转化为脱乙酰氧基头孢菌素C(DACPC)的无细胞方法 :公开了。 除了起始原料之外,反应体系还包括ATP和一种顶头孢霉的新鲜提取物,其制备和使用方法是保留将异青霉素N转化成青霉素N所必需的消旋酶试剂或试剂,该方法中必需的中间步骤 。

    Synthesis of isopenicillin derivatives in the absence of living cells
    4.
    发明授权
    Synthesis of isopenicillin derivatives in the absence of living cells 失效
    在没有活细胞的情况下合成异青霉素衍生物

    公开(公告)号:US4248966A

    公开(公告)日:1981-02-03

    申请号:US40061

    申请日:1979-05-17

    CPC分类号: C12P37/00 Y10S435/926

    摘要: Isopenicillin derivatives having antimicrobial properties and a general formula of: ##STR1## where R, R.sub.1, and R.sub.2 are hydrogen, methyl, ethyl, propyl, isopropyl, or halogenated methyl, ethyl, propyl or isopropyl radicals and R.sub.3 is ##STR2## are produced in a cell-free system using an extract from Cephalosporium acremonium. The starting materials for the synthesis consist of tripeptides composed of unsubstituted or .beta.-substituted D-valine, unsubstituted or substituted L cysteine, and L- .alpha.-aminoadipic acid or its analogues. Certain enzymes in the cell-free extract are inactivated so that conversion does not proceed past the isopenicillin stage.

    摘要翻译: 具有抗微生物性质和通式的异青霉素衍生物:其中R,R 1和R 2是氢,甲基,乙基,丙基,异丙基或卤代甲基,乙基,丙基或异丙​​基,R3是 > + TR 是使用顶头孢霉的提取物在无细胞系统中生产的。 用于合成的起始材料由由未取代或β-取代的D-缬氨酸,未取代或取代的L半胱氨酸和L-α-氨基己二酸或其类似物组成的三肽组成。 无细胞提取物中的某些酶被灭活,使得转化不通过异青霉素阶段进行。