The invention provides the compound of the formula (I):
wherein R is a hydrogen atom or a methyl, methoxyl, hydroxymethyl or nitrile group; R1 is a hydrogen atom or a lower alkyl, aralkyl, phenyl or inertly substituted lower alkyl, aralkyl or phenyl group; R2 is a hydrogen atom or a lower alkyl, aralkyl, phenyl or inertly substituted lower alkyl, aralkyl or phenyl group; and R3 is lower alkyl, aralkyl, phenyl or inertly substituted lower alkyl, aralkyl or phenyl group; any of said groups R1, R2 and R3 being optionally interlinked to form a ring of 5-7 atoms. These compounds are useful as anti-bacterial agents, β-lactamase inhibitors and chemical intermediates. Their preparation is described.
本发明提供了式(I)化合物:
其中 R 是氢原子或甲基、甲氧基、羟甲基或腈基; R1 是氢原子或低级烷基、芳基、苯基或惰性取代的低级烷基、芳基或苯基;R2 是氢原子或低级烷基、烷基、苯基或惰性取代的低级烷基、烷基或苯基;以及 R3 是低级烷基、烷基、苯基或惰性取代的低级烷基、烷基或苯基;上述任一基团 R1、R2 和 R3 可选择相互连接以形成由 5-7 个原子组成的环。这些化合物可用作抗菌剂、β-内酰胺酶抑制剂和
化学中间体。本文介绍了它们的制备方法。