申请人:Takeda Chemical Industries, Ltd.
公开号:US05438053A1
公开(公告)日:1995-08-01
Novel cephem compounds having, at the 3-position of the cephem nucleus, a group of the formula: --CH.sub.2 --S--A--Y--B wherein A stands for a further optionally substituted divalent nonionic aromatic heterocyclic group bounded to the adjacent sulfur atom via carbon atom, Y stands for a bond, a sulfur atom, an oxygen atom, NH, CONH, SO.sub.2 NH or a divalent C.sub.1 -C.sub.6 hydrocarbon chain optionally including one or two selected from the group consisting of sulfur atom, oxygen atom, NH group, CONH group and SO.sub.2 NH group in the chain, and B stands for a group of the formula: ##STR1## wherein R.sup.3 stands for H or an optionally substituted lower alkyl, R.sup.4 and R.sup.4 ' each stand for H, OH, an optionally substituted lower alkyl, COOH or CONH, or salts thereof, having excellent antibacterial activities especially against Pseudomonas aeruginosa and keeping effective serum levels over a long period.
新型头孢烯化合物,其在头孢烯核的3位上具有以下通式所示的基团:--CH.sub.2 --S--A--Y--B,其中A代表通过碳原子与相邻硫原子相连的可选取代的二价非离子性芳香杂环基团,Y代表键、硫原子、氧原子、NH、CONH、SO.sub.2 NH或可选包含一个或两个选自硫原子、氧原子、NH基团、CONH基团和SO.sub.2 NH基团的二价C.sub.1 -C.sub.6烃链,B代表以下通式所示的基团:##STR1##其中R.sup.3代表H或可选取代的低级烷基,R.sup.4和R.sup.4'各自代表H、OH、可选取代的低级烷基、COOH或CONH,或其盐,具有优异的抗菌活性,特别是对铜绿假单胞菌,并能长时间维持有效的血清水平。