申请人:E. R. Squibb & Sons, Inc.
公开号:US04386199A1
公开(公告)日:1983-05-31
Cephalosporins of the formula ##STR1## wherein R is hydrogen, sodium, potassium, or certain ester groups; R.sub.1 is in the .alpha.-configuration and is hydrogen or methoxy; R.sub.2 is hydrogen, lower alkyl, cycloalkyl, cycloalkenyl, cycloalkadienyl, substituted or unsubstituted phenyl, benzyl, phenethyl, thienyl, furyl, or pyridyl, or 2-amino-4-thiazolyl; R.sub.3 is lower alkyl or substituted or unsubstituted phenyl, benzyl, phenethyl, thienyl, or furyl; R.sub.4 is hydrogen or lower alkyl; and X is hydrogen, ##STR2## --O--lower alkyl, or certain substituted or unsubstituted heterothio groups; are disclosed. These compounds possess useful antibacterial activity.
本发明揭示了式为##STR1##的头孢菌素,其中R为氢、钠、钾或某些酯基;R.sub.1在α-构型中为氢或甲氧基;R.sub.2为氢、低碳基、环烷基、环烯基、环烷二烯基、取代或未取代的苯基、苄基、苯乙基、噻吩基、呋喃基或吡啶基,或2-氨基-4-噻唑基;R.sub.3为低碳基或取代或未取代的苯基、苄基、苯乙基、噻吩基或呋喃基;R.sub.4为氢或低碳基;X为氢、##STR2## --O--低碳基,或某些取代或未取代的杂硫杂环基团。这些化合物具有有用的抗菌活性。