Cephalosporins having the formula:
are described, wherein X is S, SO, CH₂ or O, R² is hydrogen, methoxy or formamido, R³ is hydrogen, alkenyl, alkyl or substituted alkyl, Q is a mono- or bicyclic heterocyclic ring, variously substituted, R¹ represents various groups including 2-aminothiazol-4-yl, A is =NO-, =N-NH- or =CH-, Y is CO or various linking groups, m is zero or one and P is a benzene ring with two ortho groups, one of which is hydroxy or an in vivo hydrolysable ester thereof and the other is hydroxy, an in vivo hydrolysable ester thereof, carboxy, sulpho, hydroxymethyl, -NHSO₂CH₃ or -NHCONH₂; or P is a particularly substituted pyridone or pyranone. The use of such compounds as antibacterial agents is described as are processes for their preparation.
所述
头孢菌素具有以下式子:
所述,其中 X 是 S、SO、CH₂ 或 O,R² 是氢、甲氧基或甲酰胺基,R³ 是氢、烯基、烷基或取代的烷基,Q 是各种取代的单环或双环杂环,R¹ 代表包括
2-氨基噻唑-4-基在内的各种基团,A 是=NO-、=N-NH-或=CH-、Y 是 CO 或各种连接基团,m 是 0 或 1,P 是具有两个正交基团的苯环,其中一个是羟基或其体内可
水解的酯,另一个是羟基、其体内可
水解的酯、羧基、磺基、羟甲基、-NHSO₂CH₃或 -NHCONH₂;或 P 是特别取代的
吡啶酮或
吡喃酮。本文介绍了此类化合物作为抗菌剂的用途及其制备工艺。