Cephem compounds
    16.
    发明授权
    Cephem compounds 失效
    头孢烯化合物

    公开(公告)号:US4416879A

    公开(公告)日:1983-11-22

    申请号:US296860

    申请日:1981-08-27

    摘要: The invention relates to new cephem compounds of high antimicrobial activity, the compounds having the formula ##STR1## wherein R.sup.1 is amino or a protected amino groupR.sup.2 is a saturated 4 to 8-membered heteromonocyclic group containing one sulfur atom;R.sup.3 is carboxy or a protected carboxy group andR.sup.4 is hydrogen, lower alkyl, or a group of the formula:--CH.sub.2 R.sup.4awhereR.sup.4a is acyloxy a heterocyclicthio group which may have suitable substituents or pyridinio which may have suitable substituents with the proviso that R.sup.3 is COO.sup.- when R.sup.4a is pyridinio which may have suitable substituents.

    摘要翻译: 本发明涉及具有高抗微生物活性的新的头孢烯化合物,具有式“IMAGE”的化合物,其中R 1是氨基或被保护的氨基R2是含有一个硫原子的饱和4至8元杂单环; R3为羧基或被保护的羧基,R4为氢,低级烷基或式-CH2R4a基团,其中R4a为酰氧基,可具有适当取代基的杂环硫基或可具有适当取代基的吡啶并条件是R3为 COO - 当R 4a是吡啶并可以具有合适的取代基时。