Patents by Inventor Rosemarie Collet

Rosemarie Collet 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 N-alkyl-N-methyl-3-hydroxy-3-(2-thienyl)-propylamines
    Publication number: 20050197503
    Abstract: The present invention relates to an improved process for preparing chiral N-substituted N-methyl-3-hydroxy-3-(2-thienyl)-propylamine on an industrial scale using an asymmetric hydrogenation as a key step and optionally a special sequence of subsequent steps, using a catalyst system consisting of rhodium and (2R, 4R)-4-(dicyclohexylphosphino)-2-(diphenyl-phosphino-methyl)-N-methyl-aminocarbonyl-pyrrolidine.
    Type: Application
    Filed: February 16, 2005
    Publication date: September 8, 2005
    Applicant: Boehringer Ingelheim International GmbH
    Inventors: Robert Schiffers, Paul Kreye, Wolfgang Baumgarten, Rosemarie Collet