There are disclosed a .beta.-lactam compound represented by the formula (I): ##STR1## wherein R.sub.1 represents an acyl group; M represents a hydrogen atom, a protective group or an eliminatable group which is easily hydrolyzable in a human body; B represents a group represented by the formula (b): ##STR2## where at least one of R.sub.2, R.sub.3 and R.sub.9 represent a group represented by the formula: --A--OR.sub.4 where R.sub.4 represents a hydrogen or a lower alkyl group; and A represents a straight or branched alkylene group having 1 to 6 carbon atoms; and a remaining group or groups are each independently a hydrogen atom; a cyano group; a lower alkyl group which may be substituted by a halogen atom; a carbamoyl group which may be substituted by a lower alkyl group; a cycloalkyl group; or a carboxyl group which may be substituted by a protective group or an eliminatable group which is easily hydrolyzable in a human body, and also when R.sub.9 is --A--OR.sub.4, and R.sub.3 may be combined with each other to form an alkylene group having 3 to 4 carbon atoms; and Z represents a nitrogen atom or a group represented by the formula: C--R.sub.10 where R.sub.10 represents a hydrogen atom, a carboxyl group or a lower alkyl group which may be substituted by a hydroxy group or a lower alkoxy group, or its pharmaceutically acceptable salt, and a process for preparing the same, an intermediate for synthesis of the same and a medicinal composition for bacterially infectious disease therapy containing the same.
公开了一种β-内酰胺化合物,其表示为式(I):##STR1##其中,R.sub.1表示酰基;M表示氢原子、保护基或易于在人体内
水解的可消除基;B表示由式(b)表示的基团:##STR2##其中,R.sub.2、R.sub.3和R.sub.9中的至少一个表示由式--A--OR.sub.4表示的基团,其中R.sub.4表示氢或较低的烷基基团;A表示具有1到6个碳原子的直链或支链烷基基团;剩余的基团分别独立地表示氢原子、
氰基、可以被卤素原子取代的较低烷基基团、可以被较低烷基基团取代的
氨基甲酰基团、环烷基团或可以被易于在人体内
水解的保护基或可消除基取代的羧基团,当R.sub.9是--A--OR.sub.4时,R.sub.3可以相互结合形成具有3到4个碳原子的烷基基团;Z表示氮原子或由式C--R.sub.10表示的基团,其中R.sub.10表示氢原子、羧基或可以被羟基或较低的烷氧基取代的较低烷基基团,或其药学上可接受的盐,以及制备其的过程、合成其的中间体和用于治疗细菌感染疾病的药物组合物。