Process for the preparation of an antibiotic
    1.
    发明授权
    Process for the preparation of an antibiotic 失效
    制备抗生素的方法

    公开(公告)号:US06503727B1

    公开(公告)日:2003-01-07

    申请号:US09077727

    申请日:1998-06-05

    IPC分类号: C12P3502

    摘要: The invention relates to a process for the preparation of an antibiotic, in particular cefalexin, ampicillin, amoxicillin, cefaclor, cefradin, cefadroxil, cefotaxim and the like, wherein a beta-lactam core is acylated, the antibiotic is recovered from the reaction mixture, the remaining mother liquor is subjected to a hydrolysis reaction in which the antibiotic present in the mother liquor is decomposed into its initial compounds, in particular the beta-lactam core, and the acylation agent is hydrolized. The beta-lactam core can then be recovered virtually quantitatively or recycled to the acylation reaction. This is because it has been found that the solubility of the beta-lactam core is unexpectedly high at relatively high concentrations of acylation agent and antibiotic.

    摘要翻译: 本发明涉及制备抗生素,特别是头孢氨苄,氨苄青霉素,阿莫西林,头孢克洛,头孢拉定,头孢羟氨苄,头孢噻肟等的抗生素的方法,其中β-内酰胺核心被酰化,从反应混合物中回收抗生素, 将剩余的母液进行水解反应,其中存在于母液中的抗生素分解成其初始化合物,特别是β-内酰胺核心,并且酰化剂被水解。 然后可以实际定量地回收β-内酰胺核心或循环至酰化反应。 这是因为已经发现β-内酰胺核心的溶解度在较高浓度的酰化剂和抗生素方面出人意料地高。

    Process for preparation of .beta.-lactams at constantly high
concentration of reactants
    2.
    发明授权
    Process for preparation of .beta.-lactams at constantly high concentration of reactants 失效
    不断高浓度反应物制备β-内酰胺的方法

    公开(公告)号:US6048708A

    公开(公告)日:2000-04-11

    申请号:US776115

    申请日:1997-02-19

    CPC分类号: C12P35/04 C12P37/04

    摘要: An improvement for enzymatically syhnthesizing a .beta.-lactam compound is presented. The improvement comprises catalyzing the acylation of an amino .beta.-lactam with an acylating agent for at least 5 hours with an amidase or acylase, wherein the concentration of each reactant is constantly higher than 70% of the lowest value of the saturated concentration of both reactants.

    摘要翻译: PCT No.PCT / EP95 / 02876 Sec。 371日期1997年2月19日 102(e)1997年2月19日PCT PCT 1995年7月18日PCT公布。 公开号WO96 / 02663 日期:1996年2月1日提出酶促配合β-内酰胺化合物的改进。 改进包括用酰胺酶或酰基酶催化用酰化剂将氨基β-内酰胺酰化至少5小时,其中每种反应物的浓度恒定地高于两种反应物的饱和浓度的最低值的70% 。