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US 4,036,833 AGranted
7-[(5'-N-methylthioacetamido)-adipoamido] cephalosporin derivatives
OwnerToshiyasu Ishimaru, Mariko Kawabatainventors
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Abstract
New N-substituted thio (or sulfinyl) aliphatic acylcephalosporin C and their derivatives at the 3rd position have been prepared. The compounds are useful as intermediates for recovering cephalosporin C and deacetoxycephalosporin C from their fermentation broth and also for preparing 7-aminocephalosporanic acid and its derivatives at the 3rd position.
Claims5
A compound of the formula ##STR15## wherein R.sub.1 is a lower alkyl, phenyl or benzyl group, R.sub.2 is a lower alkylene group, Y is a sulfur atom or a sulfinyl group and R.sub.3 is a thiadiazolyl, tetrazolyl or oxadiazolyl group;
- or a pharmaceutically acceptable salt or adduct thereof.
Dependencies are inferred from the claim text.