Azetidinone 4-disulfides
    8.
    发明授权
    Azetidinone 4-disulfides 失效
    氮杂环丁酮4-二硫化物

    公开(公告)号:US4435321A

    公开(公告)日:1984-03-06

    申请号:US211911

    申请日:1980-12-01

    摘要: A process for producing a 2-cephem or 3-cephem derivative compound of the formula: ##STR1## wherein R.sub.1 represents a substituted or unsubstituted amino radical and R.sub.4 represents hydrogen or a radical selected from the group consisting of carboxy, protected carboxy, ester, acid amide, acid anhydride, acid halide, acid azide and carboxy salt, and the dotted line indicates the alternate bond structure providing 3-cephem or 2-cephem, which comprises:reacting a halogenated derivative selected from the group consisting of a halogenated penam derivative having the formula: ##STR2## a halogenated cephem derivative of the formula: ##STR3## wherein X represents a halogen atom, R.sub.3 represents a radical selected from the group consisting of carboxy, protected carboxy, ester, acid amide, acid anhydride, acid halide, acid azide and carboxy salt, and R.sub.1 is as defined above, or mixtures thereof with a dehydrohalogenoic acid reagent.

    摘要翻译: 制备下式的2-头孢烯或3-头孢烯衍生物的方法:其中R 1表示取代或未取代的氨基,R 4表示氢或选自羧基,被保护的羧基,酯, 酸酰胺,酸酐,酰卤,叠氮化物和羧基盐,虚线表示提供3-头孢烯或2-头孢烯的交替键结构,其包括:使选自卤代对苯二甲酸衍生物 具有下式的化合物:下式的卤代头孢烯衍生物:其中X表示卤素原子,R3表示选自羧基,保护的羧基,酯,酰胺,酸酐,酰卤的基团 ,叠氮化钠和羧基盐,R1如上所定义,或其与脱氢卤代酸试剂的混合物。