Abstract:
[[[Imidazolidinyl amino]carbonyl]amino]acetylcephalosporin derivatives having the formula ##STR1## wherein R is hydrogen, lower alkyl, phenyl-lower alkyl, diphenyl-lower alkyl, tri(lower alkyl)silyl, trihaloethyl, a salt forming ion, or the group ##STR2## R.sub.1 is hydrogen or methoxy; R.sub.2, R.sub.3 and R.sub.5 each is hydrogen or lower alkyl; R.sub.4 is hydrogen, lower alkyl, cyclo-lower alkyl, cyclo-lower alkenyl, cyclo-lower alkadienyl, phenyl, phenyl-lower alkyl, substituted phenyl, substituted phenyl-lower alkyl, or certain heterocyclic groups; R.sub.6 is lower alkyl; and X is hydrogen, lower alkanoyloxy, ##STR3## or certain heterothio groups; are useful as antibacterial agents.
Abstract:
7.beta.-[[[(2-Cyanomethyl)amino]-1,2-dioxoethyl]amino]-acyl cephalosporins which have the formula ##STR1## wherein R is hydrogen, lower alkyl, phenyl-lower alkyl, diphenyl-lower alkyl, tri(lower alkyl)silyl, tri(lower alkyl)stannyl, trihaloethyl or a salt forming ion; R.sub.1 is hydrogen, lower alkyl, saturated or unsaturated cycloalkyl, phenyl, phenyl-lower alkyl, substituted phenyl or certain heterocyclic groups; R.sub.2 is hydrogen or methoxy; R.sub.3 is hydrogen, lower alkyl, phenyl-lower alkyl or cycloalkyl; R.sub.4 and R.sub.5 each is hydrogen or lower alkyl; and X is hydrogen, lower alkanoyloxy, carbamoyloxy, lower alkoxy, lower alkylthio ##STR2## or certain heterothio groups, are useful as antibacterial agents.
Abstract:
Compounds of the formula ##STR1## wherein R.sub.1 and R.sub.4 represent certain heterocyclic groups; R.sub.2 is hydrogen or lower alkyl; and R.sub.3 is hydrogen, lower alkyl, phenyl-lower alkyl, substituted phenyl-lower alkyl, diphenyl-lower alkyl, tri(lower alkyl)stannyl, tri(lower alkyl)silyl, a salt forming ion, or the group ##STR2## wherein R is lower alkyl, phenyl, phenyl-lower alkyl, or substituted phenyl and phenyl-lower alkyl are disclosed. These compounds are useful as antibacterial agents.
Abstract:
3-Heterothio[(thioalkyl)thioacetyl]cephalosporin derivatives which have the formula ##STR1## wherein R is hydrogen, lower alkyl, phenyl-lower alkyl, tri(lower alkyl)silyl, a salt forming ion, or the group ##STR2## R.sub. 1 is hydrogen, lower alkyl, phenyl, thienyl of furyl; R.sub.2 and R.sub.6 each is hydrogen or lower alkyl; R.sub.3 and R.sub.5 each is lower alkyl, phenyl or phenyl-lower alkyl; and R.sub.4 is a five- or six-membered nitrogen and/or sulfur or oxygen-containing ring system; are useful as antibacterial agents.
Abstract:
3-Heterothio derivatives of [[(alkoxy)thiocarbonyl]oxy]acetyl cephalosporins having the formula ##EQU1## wherein R is hydrogen, lower alkyl, phenyl-lower alkyl, tri(lower alkyl)stannyl, tri(lower alkyl)silyl, a salt forming ion or the group ##EQU2## R.sub.1 is hydrogen, lower alkyl, phenyl, pyridyl, thienyl or furyl; R.sub.2 is lower alkyl or phenyl-lower alkyl; R.sub.3 is 1-oxopyridinyl or a five membered heterocycle containing only nitrogen and carbon or nitrogen, carbon and oxygen or sulfur in the ring; R.sub.4 is lower alkyl, phenyl or phenyl-lower alkyl; are useful as antibacterial agents.
Abstract:
[(Thiophosphono)acetamido]cephalosporin derivatives of the general formula ##EQU1## wherein R is hydrogen, lower alkyl, aralkyl, tri(lower alkyl)silyl, tri(lower alkyl)stannyl, a salt forming ion or the group ##EQU2## R.sub.1 is hydrogen; R.sub.2, R.sub.3 and R.sub.4 each is lower alkyl, or aralkyl; and X is hydrogen, hydroxy or lower alkanoyloxy; are useful as antibacterial agents.
Abstract:
(Carbamoylthioacetyl)cephalosporin derivatives of the general formula ##EQU1## wherein R is hydrogen, lower alkyl, phenyl-lower alkyl, tri(lower alkyl)stannyl, tri(lower alkyl)silyl, a salt forming ion or the group ##EQU2## R.sub.1 is hydrogen, lower alkyl, phenyl, thienyl or furyl; R.sub.2 is lower alkyl, lower alkoxymethyl, phenyl or phenyl-lower alkyl; R.sub.3 is hydrogen, hydroxy or lower alkanoyloxy; and R.sub.4 is lower alkyl, phenyl or phenyl-lower alkyl; are useful as antibacterial agents.
Abstract:
3-Heterothio(carbamoylthioacetyl)cephalosporin derivatives of the general formula ##EQU1## wherein R is hydrogen, lower alkyl, phenyl-lower alkyl, tri(lower alkyl)silyl, a salt forming ion or the group ##EQU2## R.sub.1 is hydrogen, lower alkyl, phenyl, thienyl, or pyridyl; R.sub.2 is lower alkyl or phenyl-lower alkyl; R.sub.3 is a five or six membered nitrogen, sulfur and/or oxygen containing ring system; and R.sub.4 is lower alkyl, phenyl or phenyl-lower alkyl; are useful as antibacterial agents.