7-acetamidocephalosporins are disclosed herein which are substituted at position 3 of the cephalosporin nucleus with the group ##STR1## wherein R.sub.2 is selected from the group hydrogen, amino, C.sub.1 to C.sub.6 alkylamino and di-C.sub.1 to C.sub.6 alkylamino and R.sub.3, R.sub.4 and R.sub.5 are the same or different and are selected from the group hydrogen, hydroxy, C.sub.1 to C.sub.6 alkyl, C.sub.1 to C.sub.6 alkoxy, trifluoromethyl, substituted phenyl heterocyclic aryl and R.sub.3 and R.sub.4 or R.sub.4 and R.sub.5 taken together are the moiety --CH.sub.2 (CH.sub.2).sub.2 CH.sub.2 --.
本公开揭示了在
头孢菌素核心的第3位被取代为基团的7-乙酰胺基
头孢菌素,其中R.sub.2选自氢、
氨基、C.sub.1至C.sub.6烷基
氨基和二烷基
氨基群,R.sub.3、R.sub.4和R.sub.5相同或不同,选自氢、羟基、C.sub.1至C.sub.6烷基、C.sub.1至C.sub.6烷氧基、三
氟甲基、取代苯基杂环芳基,且R.sub.3和R.sub.4或R.sub.4和R.sub.5共同构成--CH.sub.2(CH.sub.2).sub.2CH.sub.2--基团。