会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 2. 发明申请
    • AN ENZYMATIC PROCESS FOR PREPARING BETA-LACTAMS
    • 用于制备BETA-LACTAMS的酶化方法
    • WO2004020652A3
    • 2004-05-06
    • PCT/EP0309661
    • 2003-08-29
    • BIOFERMA MURCIA S AGIESECKE ULRICH EBERHARD
    • GIESECKE ULRICH EBERHARD
    • C12P35/00C12P35/02C12P35/04
    • C12P35/00C12P35/02C12P35/04
    • An enzymatic process under kinetical control for preparing ß-lactams, by coupling the 7-amino group of 7-ACA with the carboxylic function of TZH activated as methyl- or ethylester. The process comprises using a penicillin amidase or a-amino acid esterase as free enzyme or in any suitable immobilised form; applying at least 100 mmol/l 7-ACA, applying TZH activated as ester a 1 - 3 fold molar ratio, and adjusting the pH to 6.0 - 8.0 and the temperature to 0 - 30°C. For direct 3-processing of the enzymatically synthesised TZ-7-ACA with heterocyclic thiols in aqueous solution at pH 6.0 - 8.5 and 50 - 75°C a dark brown colour is formed. Surprisingly this can be avoided, if 7-ACA is removed almost completely, advantageously by salting out the 7-derivative of 7-ACA. In said process the heterocylic thiol is MMTD or 2MTD and the formed product is cefazolin or ceftezol.
    • 通过将7-ACA的7-氨基与作为甲基或乙基酯活化的TZH的羧基官能团偶联制备β-内酰胺的酶反应过程。 该方法包括使用青霉素酰胺酶或α-氨基酸酯酶作为游离酶或以任何合适的固定形式; 施用至少100mmol / l 7-ACA,施用活化为酯的1-3倍摩尔比的TZH,并将pH调节至6.0-8.0,温度为0-30℃。 对于在pH 6.0-8.5和50-75℃的水溶液中用酶杂合的TZ-7-ACA与杂环硫醇的直接三步加工,形成深褐色。 令人惊奇的是,如果7-ACA几乎完全除去,有利的是通过盐析7-ACA的7-衍生物,这是可以避免的。 在所述方法中,杂环硫醇是MMTD或2MTD,形成的产物是头孢唑啉或头孢唑醇。