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 branced 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, 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
化学式为(I): ##STR1## 其中R.sub.1代表酰基;M代表氢原子,保护基或易
水解的可消除基,在人体中易
水解;B代表
化学式(b)所代表的基团:##STR2## 其中R.sub.2、R.sub.3和R.sub.9中至少有一个代表
化学式--A--OR.sub.4所代表的基团,其中R.sub.4代表氢原子或较低的烷基基团;A代表具有1到6个碳原子的直链或支链烷基基团;其余的基团各自独立地代表氢原子;
氰基;可能被卤原子取代的较低烷基基团;可能被较低烷基基团取代的
氨基甲酰基基团;环烷基团;或可能被保护基或在人体中易
水解的可消除基团取代的羧基基团;当R.sub.9为--A--OR.sub.4时,R.sub.2和R.sub.3可以结合形成具有3到4个碳原子的烷基基团;Z代表氮原子或
化学式C--R.sub.10所代表的基团,其中R.sub.10代表氢原子、羧基或可能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,以及制备它的过程,用于治疗细菌感染疾病的药物组合物。