7-[2-(2-Aminothiazol-4-yl)-2-substituted thio-acetamido] cephalosporins

摘要

A novel compound of the formula: <IMAGE> wherein R is lower alkyl or a group of the formula <IMAGE> where R1 and R2 are the same or different and each is hydrogen, carboxyl or halogen; Y is acyloxy or a group of the formula -S-Het where Het is a nitrogen-containing heterocyclic group which may optionally be substituted, or a pharmaceutically acceptable salt thereof is found to be effective for treatment of diseases in animals including domestic fowls and human beings, particularly the infectious diseases caused by gram-positive and gram-negative bacteria.