Patents by Inventor Michel Franck-Neumann

Michel Franck-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).

  • Process for the preparation of cyclopropene intermediates
    Patent number: 4410721
    Abstract: A novel cyclopropene-carboxylate of the formula ##STR1## wherein R is alkyl of 1 to 6 carbon atoms and their preparation and a process using the compounds of formula I to obtain cis compounds of the formula ##STR2##
    Type: Grant
    Filed: July 16, 1981
    Date of Patent: October 18, 1983
    Assignee: Roussel Uclaf
    Inventors: Michel Franck-Neumann, Michel Miesch
  • Alkyl 3,3-dimethyl-2-(2-hydroxy-2-methyl-propyl)-1-cyclopropene-1-carboxylates
    Patent number: 4299973
    Abstract: A novel cyclopropene-carboxylate of the formula ##STR1## wherein R is alkyl of 1 to 6 carbon atoms and their preparation and a process using the compounds of formula I to obtain cis compounds of the formula ##STR2##
    Type: Grant
    Filed: August 28, 1980
    Date of Patent: November 10, 1981
    Assignee: Roussel Uclaf
    Inventors: Michel Franck-Neumann, Michel Miesch
  • Process of preparation of alkyl esters of dl cis chrysanthemic acid
    Patent number: 4233129
    Abstract: A process for the production of an alkyl ester of dl cis chrysanthemic acid having the formula ##STR1## wherein R is an alkyl having from 1 to 6 carbon atoms, involving preparing a lithiated derivative of 2-methyl-pent-2-en-4-yne, reacting the same with an alkyl chloroformate, optionally reducing the acetylenic bond to an ethylenic bond, reacting the alkyl ester with diazo-2-propane, irradiating or heating the resultant pyrazole carboxylate and, if not previously reduced, subjecting the resultant cyclopropane carboxylate to the action of a reducing agent.
    Type: Grant
    Filed: July 20, 1979
    Date of Patent: November 11, 1980
    Assignee: Roussel Uclaf
    Inventors: Michel Franck-Neumann, Christiane Dietrich-Buchecker, Michel Miesch