1-dethia-2-thia-cephalosporanic acids
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United States of America Patent
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Mar 13, 1990
Grant Date -
N/A
app pub date -
Feb 8, 1988
filing date -
Feb 6, 1987
priority date (Note) -
Expired
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Abstract
1-dethia-2-thia-cephalosporanic acids of the formula ##STR1## wherein R is selected from the group consisting of ##STR2## R.sub.b --NH--and ##STR3## R.sub.a is an organic radical R.sub.i and R.sub.j are individually selected from the group consisting of hydrogen, aliphatic, aromatic and heterocycle or taken together with the nitrogen atom form an optionally substituted heterocycle, R.sub.b is optionally substituted carbocyclic or heterocyclic aryl, R.sub.1B is --[CH.dbd.CH].sub.n1 --CH.sub.2 --S--R.sub.m, n.sub.1 is 0, 1 or 2, Rm is an unsaturated radical including a positively charged and doubly bonded nitrogen atom and bonded to the sulfur atom through a carbon atom, R.sub.4 is hydrogen or methoxy, n.sub.2 is 0, 1 or 2 and A is selected from the group consisting of hydrogen, alkali metal ion, or alkaline earth metal ion, magnesium ion, ammonium ion, an organic amine base and an ester group or --COOA is --COO.sup.- and their non-toxic, pharmaceutically acceptable acid addition salts, having antibiotic activity.
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