CEPHALOSPORIN DERIVATIVES, PROCESS FOR THEIR PREPARATION, AND THEIR PHARMACEUTICAL USE
申请人:TEIJIN LIMITED
公开号:EP0172919A1
公开(公告)日:1986-03-05
Cephalosporin derivatives represented by formula (I), (wherein R' represents a hydrogen atom or a protective group, R2 represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, or a substituted or unsubstituted heterocyclic group, R' represents a hydrogen atom, a substituted or unsubstituted alkyl group, a cyano group, a carboxy group, an alkoxycarbonyl group, a carbomoyl group, a carbanolyl- oxy group, a heterocyclic ring, a hydroxy group, an alkoxy group or a halogen atom, R4 and R5 may be the same or different and each represents hydrogen or alkyl, I represents 0, 1 or 2, m and n each represents 1 or 2 when I is 0, or represents O when I is 1 or 2, and X represents methylene when 1 is O or 1 or represents methylene, substituted methylene or oxo when I is 2, provided that X does not represent methylene when R3, R4, and RS all represent hydrogen), salts or esters thereof have strong antibacterial activity, and are useful for treatment and prevention of various bacteria- induced diseases.
式(I)代表的头孢菌素衍生物,(其中 R'代表氢原子或保护基,R2 代表氢原子、取代或未取代的烷基、取代或未取代的环烷基或取代或未取代的杂环基、R' 代表氢原子、取代或未取代的烷基、氰基、羧基、烷氧羰基、碳酰基、碳氧羰基、杂环、羟基、烷氧基或卤素原子、R4和R5可以相同或不同,各自代表氢或烷基,I代表0、1或2,当I为0时,m和n各自代表1或2,或当I为1或2时,代表O,当1为O或1时,X代表亚甲基,或当I为2时,X代表亚甲基、取代的亚甲基或氧代,但当R3、R4和RS均代表氢时,X不代表亚甲基),其盐或酯具有很强的抗菌活性,可用于治疗和预防各种细菌引起的疾病。