申请人:F. HOFFMANN-LA ROCHE AG
公开号:EP0453924A1
公开(公告)日:1991-10-30
A process for synthesizing cephalosporin compounds of the general formula
wherein R is hydrogen or a carboxylic acid protecting group; R¹ is hydrogen or an acyl group; R² is hydrogen or lower alkoxy; and R³ is carbocyclic aryl substituted on the ring with one or more members selected from the group consisting of hydroxy, lower alkyl, amino, cyano, lower alkoxy, halogen and lower alkanoyloxy,
as well as the corresponding readily hydrolyzable esters, pharmaceutically acceptable salts and hydrates of these compounds where R is hydrogen, in which a 2-carboxylic acid 3-hydroxymethyl cephalosporin compound is first treated with an organic base to form an organic salt therewith, followed by acylation of the 3-hydroxymethyl substituent.
The end products are antibacterially active.
一种合成通式头孢菌素化合物的工艺
其中 R 是氢或羧酸保护基;R¹ 是氢或酰基;R² 是氢或低级烷氧基;R³ 是环上被一个或多个成员取代的碳环芳基,这些成员选自由羟基、低级烷基、氨基、氰基、低级烷氧基、卤素和低级烷酰氧基组成的组、
以及这些化合物相应的易水解酯、药学上可接受的盐和水合物(其中 R 为氢),其中 2 羧酸 3-羟甲基头孢菌素化合物首先用有机碱处理以形成有机盐,然后将 3-羟甲基取代基酰化。
最终产物具有抗菌活性。