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US 4,066,664 AGranted
Intermediates for preparing .alpha.-carboxy-.alpha.-(3-thienyl)penicillin and cephalosporin derivatives
AssigneeRecherche et Industrie Therapeutiques
InventorsPierre Crooij, Guy Simonet
Life of this patent
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Abstract
A new process is disclosed for the preparation of alpha-carboxy-alpha-phenyl(or 3-thienyl)penicillin and cephalosporin derivatives. The process comprises reacting a 1.3-dioxane-4.6-dione derivative with the desired penicillanic or cephalosporanic acid derivative.
Claims4
A compound of the formula:
- ##STR7## wherein:
- A is 3-thienyl;
- and
- R' and R" are either identical or different and, when n = 0, represent lower alkyl radicals of from 1 to 4 carbon atoms, or, when n is an integer between 1 and 7, R' and R" are methylene radicals.
1 more element
Dependencies are inferred from the claim text.