Cephem compounds of the formula:
wherein Q stands for a nitrogen atom or CH, R¹ stands for a hydrogen atom or an optionally substituted lower alkyl group, R² stands for a hydrogen atom or a lower alkyl group, A stands for a sulfur atom or NH, and n denotes an integral number ranging from 2 to 4, or salts thereof, and processes for producing them. The compounds (I) or salts thereof show not only excellent antibacterial activities against a wide range of pathogenic bacteria from gram-positive to gram-negative ones, including a variety of strains isolated clinically but also hydrophilic properties, and therefore they are excellent antibiotic substances having desirable water-solubility when used as injections.
式中的 Cephem 化合物:
其中 Q 代表氮原子或 CH,R¹ 代表氢原子或任选取代的低级烷基,R² 代表氢原子或低级烷基,A 代表
硫原子或 NH,n 代表 2 至 4 的整数,或其盐类,以及生产它们的工艺。化合物(I)或其盐类不仅对从革兰氏阳性到革兰氏阴性的各种致病细菌(包括临床上分离出的各种菌株)具有极佳的抗菌活性,而且还具有亲
水性,因此它们是极佳的抗生素物质,在用作注射剂时具有理想的
水溶性。