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
    • 12. 发明授权
    • Oxygen analogs of cephalosporins
    • 头孢菌素的氧类似物
    • US4622394A
    • 1986-11-11
    • US856749
    • 1977-12-02
    • John C. SheehanYoung S. Lo
    • John C. SheehanYoung S. Lo
    • C07D501/00A61K31/545
    • C07D501/00Y02P20/55
    • In accordance with this invention, it has been found that the oxygen analog of 7-amino-cephalosporanic acid and biologically active derivatives thereof can be formed from esters of 7-amino-cephalosporanic acid. Esters of 7-oxocephalosporanic acid can be formed by diazotization of an ester or 7-amino-cephalosporanic acid and contact of the diazo compound so formed with a hypohalous acid and a base in a water miscible organic solvent. Oxygen analogs of 7-aminocephalosporins isolated as esters are then formed by reducing the aforesaid ester to the corresponding 7.beta.-hydroxy-cephalosporanate and then forming the desired analog by introduction of a side chain via hydroxyl group modification. Oxygen analogs of 7-amino-cephalosporins are then formed by regeneration of the acid via protective group removal.
    • 根据本发明,已经发现7-氨基 - 头孢烷酸的氧类似物及其生物活性衍生物可由7-氨基 - 头孢烷酸的酯形成。 7-氧代头孢烷酸的酯可以通过酯或7-氨基 - 头孢烷酸的重氮化形成,并且在与水混溶的有机溶剂中与次卤酸和碱形成的重氮化合物接触。 然后通过将上述酯还原成相应的7β-羟基 - 头孢菌素形成通过羟基修饰引入侧链形成所需的类似物,形成作为酯分离的7-氨基头孢菌素的氧类似物。 然后通过去除保护基团再生酸来形成7-氨基 - 头孢菌素的氧类似物。