Compounds, represented by the following formula (I), having a β-(substituted or unsubstituted imidazo[5,1-b]thiazolyl)vinyl group at the 3-position of the cephem ring and a salt and an ester thereof are disclosed. The compounds have antibacterial activity against a very wide spectrum of bacteria and potent antibacterial activity against Gram-positive bacteria, Gram-negative bacteria, and resistant bacteria.
wherein X represents CH or N, R1 represents a hydrogen atom or an amino protective group, R2 represents a hydrogen atom, a C1-6 alkyl group, a C3-7 cycloalkyl group, or a hydroxy protective group, R3 is absent or represents a hydrogen atom, a salt forming cation, or a carboxyl protective group, R4, R5, and R6, which may be the same or different, each independently represent a hydrogen atom or a C1-6 alkyl group, R7+ is absent or a cation of a C1-6 alkyl, and n is an integer of 0 to 1.
本发明公开了由下式(I)表示的在头孢环的 3 位上具有 β-(取代或未取代的
咪唑并[5,1-b]
噻唑基)
乙烯基的化合物及其盐和酯。这些化合物对非常广泛的细菌具有抗菌活性,对革兰氏阳性菌、革兰氏阴性菌和耐药菌具有强效抗菌活性。
其中 X 代表 CH 或 N,R1 代表氢原子或
氨基保护基团,R2 代表氢原子、C1-6 烷基、C3-7 环烷基或羟基保护基团,R3 不存在或代表氢原子、成盐阳离子或羧基保护基团,R4、R5 和 R6 可以相同或不同,各自独立地代表氢原子或 C1-6 烷基,R7+ 不存在或代表 C1-6 烷基的阳离子,n 为 0 至 1 的整数。