Cephalosporinderivatives, process for their preparation and pharmaceutical compositions
申请人:BEECHAM GROUP PLC
公开号:EP0418020A2
公开(公告)日:1991-03-20
β-Lactam compounds of the formula (I) including pharmaceutically acceptable salts and in vivo hydrolysable esters, processes for their preparation and their use as antibiotics:
wherein
R1 is hydrogen, methoxy or formamido;
R2 is an acyl group, in particular that of an antibacterially active cephalosporin;
R3 is hydrogen or a readily removable carboxy protecting group (such as a pharmaceutically acceptable in-vivo hydrolysable ester group);
R4 is a y- or δ-lactone,ring optionally containing one or (where applicable) two endocyclic double bonds, which ring is optionally substituted at any carbon atom by alkyl, dialkylamino, alkoxy, hydroxy, halogen or aryl, which in the case of more than one substituent may be the same or different, or is optionally di-substituted at two adjacent carbon atoms, which are available for substitution, to form an aromatic fused bicyclic system; x and y are independently 0 or 1; x is S, SO, S02, 0 or CH2; and Y is 0 or S.
式 (I) 的 β-内酰胺化合物,包括药学上可接受的盐类和体内可水解的酯类,其制备工艺及其作为抗生素的用途:
其中
R1 是氢、甲氧基或甲酰胺基;
R2 是酰基,特别是抗菌活性头孢菌素的酰基;
R3 是氢或易于去除的羧基保护基团(如药学上可接受的体内可水解酯基);
R4是y-或δ-内酯环,可选择含有一个或(适用时)两个内环双键,该环可选择在任何碳原子上被烷基、二烷基氨基、烷氧基、羟基、卤素或芳基取代,在多个取代基相同或不同的情况下,也可选择在两个相邻碳原子上被二取代,这两个碳原子可用于取代,以形成芳香族融合双环体系;x 和 y 独立地为 0 或 1;x 为 S、SO、S02、0 或 CH2;Y 为 0 或 S。