Patents by Inventor Michel Frank-Neumann

Michel Frank-Neumann 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).

  • Cyclopropane derivatives containing the thiocarbonate group
    Patent number: 4677218
    Abstract: A process for the preparation of racemic or optically active isomers of alkyl esters of cis chrysanthemic of the formula ##STR1## wherein R is alkyl of 1 to 6 carbon atoms comprising reacting a racemic or optically active cis compound of the formula ##STR2## wherein R has the above definition with an aryl halothioformate of the formula ##STR3## wherein Hal is a halogen and Ar is aryl of 6 to 12 carbon atoms optionally substituted with at least one alkyl of 1 to 3 carbon atoms to obtain a compound of the formula ##STR4## of cis configuration and heating the latter optionally in an organic solvent to obtain the compound of formula I and novel intermediates.
    Type: Grant
    Filed: July 16, 1985
    Date of Patent: June 30, 1987
    Assignee: Roussel Uclaf
    Inventors: Michel Frank-Neumann, Madjid Sedrati, Jean-Pierre Vigneron, Vincente Bloy
  • Process of preparing alkyl cis chrysanthemates
    Patent number: 4551545
    Abstract: A process for the preparation of racemic or optically active isomers of alkyl esters of cis chrysanthemic of the formula ##STR1## wherein R is alkyl of 1 to 6 carbon atoms comprising reacting a racemic or optically active cis compound of the formula ##STR2## wherein R has the above definition with an aryl halothioformate of the formula ##STR3## wherein Hal is a halogen and Ar is aryl of 6 to 12 carbon atoms optionally substituted with at least one alkyl of 1 to 3 carbon atoms to obtain a compound of the formula ##STR4## of cis configuration and heating the latter optionally in an organic solvent to obtain the compound of formula I and novel intermediates.
    Type: Grant
    Filed: July 18, 1984
    Date of Patent: November 5, 1985
    Assignee: Roussel Uclaf
    Inventors: Michel Frank-Neumann, Madjid Sedrati, Jean-Pierre Vigneron, Vincente Bloy