Antibacterial 7.beta.-arylmalonamido-7.alpha.-methoxy-3-heterocyclic thiomethyl-3-cephem-4-carboxylic acids of the formula: ##STR1## wherein Ar is a heterocyclic group or p-oxysubstituted phenyl; COB.sup.1 and COB.sup.2 are each a carboxy or protected carboxy group; and Het is an unsubstituted or substituted heterocyclic group. These compounds are prepared from, e.g., 7.beta.-amino-7.alpha.-methoxy-3-heterocyclic thiomethyl-3-cephem-4-carboxylic acid derivatives by acylation with arylmalonic acid or reactive derivatives thereof. They are useful as an active ingredient in antibacterial pharmaceutical preparations.
抗菌7.beta.-芳基马隆酰胺基-7.alpha.-甲氧基-3-杂环
硫甲基-3-头孢烷-4-
羧酸的
化学式为:##STR1## 其中Ar是杂环基或对氧代取代苯基;COB.sup.1和COB.sup.2分别是羧基或保护羧基;Het是未取代或取代杂环基。这些化合物是从7.beta.-
氨基-7.alpha.-甲氧基-3-杂环
硫甲基-3-头孢烷-4-
羧酸衍
生物通过芳基马隆酸或其反应衍
生物的酰化制备而成。它们可用作抗菌药物制剂的活性成分。