Cephalosporins having an .alpha.-acylaminoacetic acid side chain

Drug – bio-affecting and body treating compositions – Antigen – epitope – or other immunospecific immunoeffector – Bacterium or component thereof or substance produced by said...

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544 24, 544 25, 544 27, 544 28, 544 22, C07D50136, A61K 3138, C07D50132, C07D50154

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active

040411613

ABSTRACT:
Compounds of the formula ##STR1## wherein R.sub.1 denotes optionally substituted phenyl, thienyl, furyl or 1,4-cyclohexadienyl, R.sub.2 represents a free carboxyl group or an esterified carboxyl group which can be split physiologically, R.sub.3 represents hydrogen, lower akoxy or an optionally substituted methyl group and B represents an optionally substituted six-membered ring with 1 to 3 ring nitrogen atoms, which is bonded to the carbonyl group --C(.dbd.O)-- by one of its carbon atoms, the nitorgen atoms of a monocyclic six-membered ring having 2 nitrogen atoms being either adjacent or separated by two ring carbon atoms, and the salts of such compounds which have a salt-forming group, including the inner salts, for example the 7.beta.-[D(-)-.alpha.-(3,5-Dioxo-2,3,4,5-tetrahydro-1,2,4-triazine-6-carbo xamido)-phenylacetamido]-cephalosporanic acid, have antibiotic activity.

REFERENCES:
patent: 3687949 (1972-08-01), Holdrege
patent: 3912728 (1975-10-01), Crooij et al.

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