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US 3,939,157 AGranted
3-Benzyl-7-substituted acetamido-3-cephem-4-carboxylic acids and halogenated benzyl derivatives
AssigneeBeecham Group Limited
InventorsJohn Herbert Charles Nayler, Michael John Pearson, Robert Southgate
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Abstract
Antimicrobially active ceph-3-ems having in the 3-position a benzyl or mono-halobenzyl group, preferably with the mono-halo group in the para-position of the phenyl part of the benzyl group.
Claims6
A compound of the formula:
- ##SPC30##
- wherein R is phenyl or mono-halophenyl;
- X is phenylacetamido, phenoxyacetamido, 2-thienylacetamido, .alpha.-aminophenylacetamido or .alpha.-azidophenylacetamido;
- and R.sup.3 is a carboxylic acid group, a pharmaceutically acceptable salt of the carboxylic acid group or t-butyl ester of the carboxylic acid group.
1 more element
Dependencies are inferred from the claim text.