Antibacterial compounds of the formula ##STR1## in which R.sub.1 is a cyclic or secondary acyclic amino group which independently has antibacterial activity; R.sub.2 is hydrogen, lower alkoxy, lower alkylthio or formamido; R.sub.3 is hydrogen or an organic group bonded through carbon, oxygen, sulfur or nitrogen; R.sub.4 is an electronegative acidic group; or R.sub.3 and R.sub.4 together form a heterocycle; and R.sub.5 is hydrogen or lower alkyl, except when R.sub.3 and R.sub.4 form a heterocycle, in which case R.sub.5 is hydrogen only; and methods of using same.
β-Lactam compounds of the formula
in which R₁ is a cyclic or secondary acyclic amino group which independently has antibacterial activity;
R₂ is hydrogen, lower alkoxy, lower alkylthio or formamido;
R₃ is hydrogen or an organic group bonded through carbon, oxygen, sulfur or nitrogen;
R₄ is an electronegative acidic group; or R₃ and R₄ together form a heterocycle; and
R₅ is hydrogen or lower alkyl, except when R₃ and R₄ form a heterocycle, in which case R₅ is hydrogen only;
and readily hydrolyzable esters and pharmaceutically acceptable salts of these compounds, and hydrates of any of the foregoing.
The products have antibacterial activity.
Antibacterial compounds of the formula ##STR1## in which R.sub.1 is a cyclic or secondary acyclic amino group which independently has antibacterial activity: R.sub.2 is hydrogen, lower alkoxy, lower alkylthio or formamido; R.sub.3 is hydrogen or an organic group bonded through carbon, oxygen, sulfur or nitrogen; R.sub.4 is an electronegative acidic group; or R.sub.3 and R.sub.4 together form a heterocycle; and R.sub.5 is a hydrogen or lower alkyl, except when R.sub.3 and R.sub.4 form a heterocycle, in which case R.sub.5 is hydrogen only; and methods of using same.