Disclosed are novel carbapenem derivatives characterized by a 2-substituent of the formula ##STR1## in which A represents cyclopentylene, cyclohexylene or C.sub.2 -C.sub.6 alkylene optionally substituted by one or more C.sub.1 -C.sub.4 alkyl groups; R.sup.5 represents either (a) an optionally substituted aliphatic, cycloaliphatic, cycloaliphatic-aliphatic, aryl, araliphatic, heteroaryl, heteroaraliphatic, heterocyclyl or heterocyclyl-aliphatic radical or (b) a divalent phenylene or C.sub.1 -C.sub.4 alkylene group joined to the ##STR2## ring so as to form a bridged polycyclic group; and ##STR3## represents a quaternized nitrogen-containing non-aromatic heterocycle. Such derivatives are useful as potent antibacterial agents.
本发明涉及一种新的碳青霉烯衍
生物,其特征在于具有公式##STR1##中的2-取代基,其中A代表
环戊烯基,
环己烯基或C.sub.2-C.sub.6烷基,该烷基可以选择性地被一个或多个C.sub.1-C.sub.4烷基取代;R.sup.5表示(a)选择性地取代的脂肪族,环状脂肪族,环状脂肪族-脂肪族,芳香族,芳基脂肪族,杂环芳基,杂环芳基脂肪族,杂环基或杂环基-脂肪族基团或(b)连接到##STR2##环的二价苯基或C.sub.1-C.sub.4烷基,以形成桥联的多环群;以及##STR3##代表季
铵化的含氮非芳香族杂环。这些衍
生物可用作有效的抗菌剂。