Patents by Inventor Michel Barthe

Michel Barthe 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).

  • Stereospecific isomerisation of allyl amines using chiral phosphorous ligands
    Patent number: 6020527
    Abstract: The present invention describes a stereospecific process for the isomerization of prochiral allyl amines into chiral enamines and imines, using Rh, Ir or Ru catalysts which carry chiral phosphine ligands derived from ferrocenes, which may be immobilized on a solid carrier, or from steroides. The process is in particular appropriate for the production of chiral citronellal, which can be obtained in optical purities of greater than 95%.
    Type: Grant
    Filed: March 31, 1999
    Date of Patent: February 1, 2000
    Assignee: Firmenich SA
    Inventors: Christian Chapuis, Michel Barthe