A cephem derivative represented by the following formula:
wherein R₁ means a fluorine-substituted lower alkyl and A₁ denotes a cyclic or acyclic ammonio group, or a non-toxic salt thereof, is prepared by reacting a compound represented by the following formula:
wherein A₁ has the same meaning as defined above, with another compound represented by the following formula:
wherein R₁ has the same meaning as defined above, and if necessary, removing the protecting groups. The cephem compounds can be used for the manufacture of pharmaceutical compositions having antibacterial activity.
下式所代表的头孢
烷烃衍
生物:
其中 R₁ 表示
氟取代的低级烷基,A₁ 表示环状或无环状
铵基,或其无毒盐,由下式表示的化合物与另一种下式表示的化合物反应制备:
其中 A₁ 的含义与上式定义相同,与下式代表的另一种化合物反应制备:
其中 R₁的含义与上式定义相同,必要时去除保护基团。这些 cephem 化合物可用于制造具有抗菌活性的药物组合物。