申请人:Glaxo Group Limited
公开号:US04315005A1
公开(公告)日:1982-02-09
Cephalosporin antibiotics of general formula ##STR1## (wherein R.sup.1 and R.sup.b, which may be the same or different, each represent a C.sub.1-2 alkyl group, or together with the carbon atom to which they are attached form a C.sub.3-6 cycloalkylidene group and Y.sup..sym. represents a 1-carbamoylmethylpyridinium group) exhibit broad spectrum antibiotic activity, the activity being unusually high against gram-negative organisms such as strains of Pseudomonas organisms. Particularly effective compounds of formula (I) are (6R,7R)-7-[(Z)-2-(2-aminothiazol-4-yl)-2-(2-carboxyprop-2-oxyimino)acetami do]-3-[(1-carbamoylmethylpyridinium-4-yl)thiomethyl]ceph-3-em-4-carboxylate and (6R,7R)-[(Z)-2-(2-aminothiazol-4-yl)-2-[(1-carboxycyclobut-1-oxyimino)acet amido]-3-[(1-carbamoylmethylpyridinium-4-yl)thiomethyl]-ceph-3-em-4-carboxy late. The invention also includes the non-toxic salts and non-toxic metabolically labile esters of compounds of formula (I), compositions containing the antibiotic compounds of the invention and processes for the preparation of the antibiotics.
头孢菌素抗生素的一般结构式为##STR1##(其中R.sup.1和R.sup.b,可以相同也可以不同,每个代表一个C.sub.1-2烷基基团,或者与它们连接的碳原子一起形成一个C.sub.3-6环烷基亚基团,Y.sup..sym.代表一个1-羰基甲基吡啶基团),表现出广谱抗生素活性,对革兰氏阴性微生物如假单胞菌菌株的活性异常高。特别有效的式(I)化合物为(6R,7R)-7-[(Z)-2-(2-氨基噻唑-4-基)-2-(2-羧基丙-2-氧基亚胺)乙酰胺]-3-[(1-羰基甲基吡啶-4-基)硫甲基]头孢-3-烯-4-羧酸酯和(6R,7R)-[(Z)-2-(2-氨基噻唑-4-基)-2-[(1-羧基环丁-1-氧基亚胺)乙酰胺]-3-[(1-羰基甲基吡啶-4-基)硫甲基]-头孢-3-烯-4-羧酸酯。该发明还包括式(I)化合物的非毒性盐和非毒性代谢易降解酯,含有该发明的抗生素化合物的组合物以及制备抗生素的方法。