The present invention relates to a cephalosporin compound represented by the following general formula (I), its pharmaceutically acceptable non-toxic salt, physiologically hydrolyzable ester, hydrate or solvate, or isomers thereof, which is useful as an antibiotic agent :
in which
R1 represents hydrogen or an amino-protecting group,
R2 and R3 can be identical or different and each represent hydrogen or a hydroxy-protecting group, or
R2 and R3 together can form a diol-protecting cyclic group,
R4 represents hydrogen or a carboxyl-protecting group,
R5 represents hydrogen, C1 -4 alkyl, alkoxycarbonyl, carboxyl or sulfomethyl,
R6 represents hydrogen, amino or substituted amino, and
R7 represents C1 -4 alkyl, amino or substituted amino, or
R5 and R6 together with the carbon atoms to which they are attached can form a 3 to 7-membered cyclic group, or
R6 and R7 together with the carbon and nitrogen atoms to which they are attached can form a 3 to 7- membered heterocyclic ring which may optionally contain additional heteroatoms such as nitrogen and/or oxygen and which may be substituted with the substituents selected from C, -4 alkyl, amino and substituted amino, and
Q represents CH or N.
本发明涉及一种
头孢菌素化合物,其通式(I)如下,其药学上可接受的无毒盐,生理
水解酯,
水合物或溶剂化物,或其异构体,可用作抗生素剂:
其中,R1代表氢或
氨基保护基,R2和R3可以相同也可以不同,每个代表氢或羟基保护基,或者R2和R3可以共同形成二醇保护环;R4代表氢或羧基保护基,R5代表氢,C1-4烷基,烷氧羰基,羧基或磺酰甲基,R6代表氢,
氨基或取代
氨基,R7代表C1-4烷基,
氨基或取代
氨基,或者R5和R6与它们连接的碳原子可以形成3到7成员的环,或者R6和R7与它们连接的碳和氮原子可以形成3到7成员的杂环,其中可以选择包含额外杂原子如氮和/或氧,并且可以用所选的取代基替代,Q代表CH或N。