7-N-Heterocyclyl cephalosporins and antibiotic pharmaceutical compositions containing them

A compound having the structural formula:

• ##STR331## and the pharmaceutically acceptable salts and esters thereof wherein:
• p is 1 or 2;
• R.degree. is H or CH.sub.3 ;
• R.sup.2 is hydrogen or methoxyl;
• R' is selected from the group consisting of:
• ##STR332## wherein the dotted line indicates both saturated and unsaturated rings;
• and
• wherein:
• R is hydrogen alkyl having from 1-6 carbon atoms, substituted alkyl having from 1-6 carbon atoms wherein the substituent is chloro, fluoro, hydroxyl, alkoxyl (C.sub.1-6), carboxyl, amino, sulfo and mono- and dialkylamino wherein each alkyl has 1-6 carbon atoms substituted and unsubstituted phenylaklkyl and phenylalkenyl having 7-12 carbon atoms wherein the substituent is selected from chloro, fluoro, carboxyl, amino, cyano, hydroxyl and sulfo;
• R.sup.3 is chloro, fluoro, hydroxyl, carboxyl, sulfo, cyano, amino, mono- and dialkylamino, alkoxyl, alkyl having from 1-6 carbon atoms, substituted alkyl having 1-6 carbon atoms wherein the substituent is carboxyl, cyano, alkoxyl having 1-6 carbon atoms, phenyl and phenyloxy;
• n is an integer selected from 0 to 3 and
• A is selected from:
• ##STR333## wherein Y is a pharmaceutically acceptable anion and M is a pharmaceutically acceptable cation.