3-Heterothio(.alpha.-thiocarbonylamino)cephalosporin derivatives of the general formula ##STR1## wherein R is hydrogen, lower alkyl, phenyl-lower alkyl, tri(lower alkyl)silyl, trihaloethyl, a salt forming ion or the group ##STR2## R.sub.1 is hydrogen, lower alkyl, cyclo-lower alkyl, unsaturated cyclo-lower alkyl, phenyl, substituted phenyl or thienyl; R.sub.2 and R.sub.5 each is hydrogen or 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.
3-杂
硫(.alpha.-
硫代
氨基)
头孢菌素衍
生物的一般式为##STR1##其中R为氢、低碳基、苯基-低碳基、三(低碳基)
硅基、三卤乙基、盐形成离子或基团##STR2##R.sub.1为氢、低碳基、环-低碳基、不饱和环-低碳基、苯基、取代苯基或
噻吩基;R.sub.2和R.sub.5各为氢或低碳基;R.sub.3为五元或六元含氮、
硫和/或氧的环系统;R.sub.4为低碳基、苯基或苯基-低碳基;可用作抗菌剂。