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
    • 21. 发明专利
    • Oxadethiacephalosporin intermediate and its preparation
    • OXADETHIACEPHALOSPORIN中间体及其制备
    • JPS5951291A
    • 1984-03-24
    • JP15954882
    • 1982-09-16
    • Meiji Seika Kaisha LtdMerck & Co Inc
    • OKONOGI TSUNEOMURAI YASUSHISHIBAHARA MASAYUKIFUKATSU SHIYUNZOUNIIDA TAROUWAKAZAWA TADASHI
    • A61K31/535A61P31/04C07D205/085C07D403/12C07D505/00C07F9/568
    • C07D403/12C07D205/085C07D505/00C07F9/5683Y02P20/55
    • NEW MATERIAL:The compound of formula I [R1 is H or OCH3; R2 is lower alkyl; R3 is CH3, halomethyl, or -CH2S-Het (Het is heterocyclic group which may have substitutent group); A is H or COOH-protecting group]. EXAMPLE:7beta-Amino -7alpha- methoxy-2alpha-methyl -3-(1-methyl-1H-tetrazol-5-yl) thiomethyl-1-oxa-1-dethia-3-cephem-4-carboxylic acid. USE:A synthetic intermediate of 7beta-acyl-2-alkyl-1-oxa-1-dethia-cephalosporin compound which is a strong antibacterial agent. PROCESS:The compound of formula I can be prepared by (1) cyclizing the novel azetidinone compound of formula II (RCO- is acyl; ph is phenyl; A' is COOH- protecting group), (2) eliminating the RCO-group from the resultant compound of formula III, (3) reacting the product with an aromatic aldehyde to obtain the compound of formula IV (R4 is aromatic group), and (4) carrying out the steric inversion of the 7alpha-NH2.
    • 新材料:式I化合物[R1是H或OCH3; R2是低级烷基; R3是CH3,卤甲基或-CH2S-Het(Het是可以具有取代基的杂环基); A为H或COOH保护基]。 实施例:7β-氨基-7α-甲氧基-2α-甲基-3-(1-甲基-1H-四唑-5-基)硫甲基-1-氧杂-1-脱硫-3-头孢烯-4-羧酸。 用途:作为强抗菌剂的合成中间体,其为β-二酰基-2-烷基-1-氧杂-1-脱氢头孢菌素化合物。 方法:式I化合物可以通过(1)环化式II的新的氮杂环丁酮化合物(RCO-是酰基; ph是苯基; A'是COOH-保护基)来环化,(2)消除RCO- 所得到的式III化合物,(3)使产物与芳族醛反应,得到式IV化合物(R4为芳族基团),和(4)进行7α-NH 2的空间倒置。
    • 22. 发明专利
    • New preparation of cephamycin derivative
    • CEPHAMYCIN衍生物的新制备
    • JPS5726690A
    • 1982-02-12
    • JP10060380
    • 1980-07-24
    • Meiji Seika Kaisha Ltd
    • SAITOU TOSHINORIFUKATSU SHIYUNZOUNISHIHATA TAKESHISHIBAHARA MASAYUKI
    • C07D501/04C07D501/57
    • Y02P20/55
    • PURPOSE: To obtain the titled compound useful as an antimicrobial agent, etc. in high yield, by treating a specific amide group-containing cephem carboxylic acid with a halogenating agent, followed by imino etherification with a lower alcohol, treatment with an acylating agent, and removal of protecting group.
      CONSTITUTION: A compound shown by the formula I (R
      1 is amino-protecting group; R
      2 is H or amino-protecting group; R
      3 and R
      4 are carboxyl-protecting group) is treated with a halogenating agent in the presence of a base to give an imino halide derivative, which is reacted with a lower alcohol to give an imino ether derivative shown by the formula II (R
      5 is lower alkyl). This compound is reacted with an acylating agent to give a compound shown by the formula III [R
      6 is X
      2 CH (X
      2 is halogen), etc.], the carboxyl-protecting group R
      4 is removed and the resulting compound is reacted with cysteine, etc., to give 7β-(2D-2-amino-2-carboxyl) eth ethyl-thioacetamido-7α-methoxy-3-( 1-methyl-1H-tetrazole-5-yl )thiomethyl-3-cephem-4-carboxylic acid shown by the formula IV or its salt.
      COPYRIGHT: (C)1982,JPO&Japio
    • 目的:通过用卤化剂处理含有特定酰胺基的头孢霉酸,然后用低级醇进行亚氨基醚化,用酰化剂处理,以高产率获得用作抗微生物剂等的标题化合物, 并除去保护基。 构成:式I化合物(R 1为氨基保护基; R 2为H或氨基保护基; R 3和R 4为羧基保护基)的化合物用 卤化剂在碱存在下反应,得到亚氨基卤化物衍生物,其与低级醇反应,得到式II所示的亚氨基醚衍生物(R 5为低级烷基)。 该化合物与酰化剂反应,得到式III所示的化合物[R 6为X 2 CH(X 2为卤素)等],羧基保护基R 4, 并将所得化合物与半胱氨酸等反应,得到7beta-(2D-2-氨基-2-羧基)乙基 - 乙酰基氨基-7α-甲氧基-3-(1-甲基-1H-四唑-5 - 基)硫代甲基-3-头孢烯-4-羧酸或其盐。