申请人:Meiji Seika Kaisha Ltd.
公开号:US04898858A1
公开(公告)日:1990-02-06
New cephalosporin derivatives of a general formula (I) and non-toxic salts and non-toxic esters thereof are provided: ##STR1## (wherein R represents an acyclic or cyclic lower alkyl group having 1-6 carbon atoms, which may optionally be substituted by a halogen atom; the steric configuration as asterisked (*) includes an optical-active (R)-form or (S)-form or an optical-inactive (RS)-form; n is 0 or 1, n.sup.1 is 0 to 3, n.sup.2 is 0 to 3; and when n.sup.1 is 0, n.sup.2 is 3; when n.sup.1 is 1, n.sup.2 is 2; when n.sup.1 is 2, n.sup.2 is 1; when n.sup.1 is 3, n.sup.2 is 0). The new derivatives of the formula (I) and non-toxic salts and esters thereof have high bactericidal activity with broad antibacterial spectra, and these are useful as active ingredients in bactericides.
提供了一般公式(I)的新头孢菌素衍生物以及其非毒性盐和非毒性酯类:##STR1##(其中R代表具有1-6个碳原子的无环或环状低碳基团,可以选择性地被卤素原子取代;带星号(*)的立体构型包括光学活性(R)-形式或(S)-形式或光学非活性(RS)-形式;n为0或1,n.sup.1为0至3,n.sup.2为0至3;当n.sup.1为0时,n.sup.2为3;当n.sup.1为1时,n.sup.2为2;当n.sup.1为2时,n.sup.2为1;当n.sup.1为3时,n.sup.2为0)。公式(I)的新衍生物及其非毒性盐和酯具有广谱抗菌活性,可作为杀菌剂中的活性成分。