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 of 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 of an eliminatable group which is easily hydrolyzable in a human body, and also when R.sub.9 is -A-OR.sub.4, R.sub.2 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,其由以下通式(I)表示: ##STR1## 其中R1表示酰基;M表示氢原子,或可在人体内易
水解的可消除保护基团;B表示由通式(b)表示的基团: ##STR2## 其中至少一个R2、R3和R9表示由以下通式表示的基团:-A-OR4,其中R4表示氢或低级烷基;A表示具有1至6个碳原子的直链或支链亚烷基;剩余的基团或基团各自独立地为氢原子;
氰基;可被卤素原子取代的低级烷基;可被低级烷基取代的
氨基甲酰基;环烷基;或可被易在人体内
水解的可消除保护基团取代的羧基,当R9为-A-OR4时,R2和R3可以相互结合形成具有3至4个碳原子的亚烷基;Z表示氮原子或由以下通式表示的基团:C-R10,其中R10表示氢原子、羧基或可被羟基或低级烷氧基取代的低级烷基,或其药学上可接受的盐,以及制备该化合物的方法、用于合成该化合物的中间体和含有该化合物的用于细菌感染疾病治疗的药物组合物。