申请人:E. R. Squibb & Sons, Inc.
公开号:US03960849A1
公开(公告)日:1976-06-01
Amino-1,2,4-oxadiazolyl-3-acetyl penicillins and cephalosporins of the general formula ##SPC1## Wherein A is either ##SPC2## R.sub.1 and R.sub.2 are independently selected from hydrogen and lower alkyl or R.sub.1 and R.sub.2 together with the nitrogen atom to which they are attached form a heterocyclic ring; R.sub.3 is hydrogen, lower alkyl, phenyl, hydroxyphenyl, thienyl, furyl, or pyridyl; R.sub.4 is hydrogen, lower alkyl, phenyl-lower alkyl, benzhydryl, a salt forming ion, trimethylsilyl, or ##EQU1## R.sub.5 is lower alkyl, phenyl or phenyl-lower alkyl; X is hydrogen, lower alkoxy, lower alkanoyloxy, lower alkylmercapto, the radical of a nitrogen base; or certain heterocyclic thio moieties; are disclosed. They are useful as antibacterial agents.
本发明涉及一般式为##SPC1##的氨基-1,2,4-噻二唑基-3-乙酰基青霉素和头孢菌素,其中A为##SPC2##,R.sub.1和R.sub.2分别选自氢和较低的烷基,或者R.sub.1和R.sub.2与它们连接的氮原子形成杂环环;R.sub.3为氢、较低的烷基、苯基、羟基苯基、噻吩基、呋喃基或吡啶基;R.sub.4为氢、较低的烷基、苯基-较低的烷基、苯甲基、成盐离子、三甲基硅基或##EQU1##;R.sub.5为较低的烷基、苯基或苯基-较低的烷基;X为氢、较低的烷氧基、较低的烷酰氧基、较低的烷基硫醇基、氮碱基的基团;或某些杂环硫基团。它们可用作抗菌剂。