Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1974-03-13
1976-06-01
Rizzo, Nicholas S.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
424246, 2602391, 424271, C07D49944, C07D50120
Patent
active
039608492
ABSTRACT:
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.
REFERENCES:
patent: 3516997 (1970-06-01), Takano et al.
patent: 3743644 (1973-07-01), Essery et al.
patent: 3821207 (1974-06-01), Chow et al.
Davis Stephen B.
E. R. Squibb & Sons Inc.
Levinson Lawrence S.
Rizzo Nicholas S.
Smith Merle J.
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