Patents by Inventor Alain Bonenfant

Alain Bonenfant has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Asymmetric heterocyclic ester derivatives of 1,4-dihydropyridine-3,5-dicarboxylic acids
    Patent number: 4710505
    Abstract: The present invention relates to new asymmetric heterocyclic ester derivatives of 1,4-dihydropyridine-3,5-dicarboxylic acids of the formula: ##STR1## wherein R.sub.1 is a C.sub.1 -C.sub.4 -alkyl group; X and Y, which are identical or different, each represent O or S, at least one of the symbols X and Y being different from S; n is an integer equal to 1 or 2; and R.sub.2 and R.sub.3, which are identical or different, each represent H, CH.sub.3, CF.sub.3, C.sub.6 H.sub.5 or halogenophenyl, it being possible for R.sub.2 and R.sub.3, taken together, to form a 5-membered to 7-membered spirocycloaliphatic group with the C atom of the heterocyclic group to which they are bonded; and their optical iomers and diastereoisomers.These new derivatives are useful as pharmaceuticals, in particular as vasodilators.
    Type: Grant
    Filed: February 19, 1986
    Date of Patent: December 1, 1987
    Assignee: Societe de Recherches Industrielles (S.O.R.I.)
    Inventors: Jacques Robin, Didier Pruneau, Alain Bonenfant