7-Aoyl-3-cephem -4-carboxylic acids, process for their preparation and compositions containing them. Cephalosperins with the formula:
in which R represents a pharmaceutically acceptable acyl group known to be utility as a substituent on the 7-amine group in cephalosporins or on the 6-amino group in penicillins have antibacterial activity. The compounds are prepared I by displacement of an acetyl group from a 3-acetoxymethyl group of an appropriately substituted cephalosporin or 7-amino cephalosporin with 1-(2- sulfamidoethyl) 1,4-dihydro-5H-tetrazole-5-thione, and if desired introducing a required 7-acyl group.
7-酰基-3-头孢-4-
羧酸、其制备方法和含有它们的组合物。
头孢菌素的式为
其中 R 代表已知可用作
头孢菌素中 7-
氨基或
青霉素中 6-
氨基取代基的药学上可接受的酰基,具有抗菌活性。这些化合物的制备方法 I 是用 1-(2-磺酰胺基乙基)1,4-二氢-5H-四唑-5-
硫酮取代适当取代的
头孢菌素或 7-
氨基
头孢菌素的 3-乙酰氧甲基上的乙酰基,并根据需要引入所需的 7-酰基。