Compounds of formula (I)
wherein
R1 represents a hydrogen atom or a C1-4 alkyl group optionally substituted by one to three halogen atoms;R2 and R3, which may be the same or different, each represents a hydrogen atom or a carboxyl blocking group;R4 represents a hydrogen atom or an amino protecting group;R5 and R6 each represents a hydroxy or substituted hydroxy group or R5 and R6 together represent a cyclic protected diol group;Z is -S-or -SO-(α-or β-) and the dotted line bridging the 2-, 3-, and 4-positions indicate that the compound is a ceph-2-em or ceph-3-em compound; and salts and solvates thereof.
化学式为(I)的化合物,其中:
R1表示氢原子或C1-4烷基,可选地被1至3个卤素原子取代;
R2和R3,可以相同也可以不同,每个都表示氢原子或
羧酸阻断基;
R4表示氢原子或
氨基保护基;
R5和R6每个表示羟基或取代羟基基团,或者R5和R6一起表示环保护二醇基团;
Z为-S-或-SO-(α-或β-),连接2、3和4位的虚线表示该化合物为头孢2-酰基或头孢3-酰基化合物;
以及其盐和溶剂化物。