Patents by Inventor Hans-Joachin Drexler

Hans-Joachin Drexler 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 preparing a substituted dimethyl-(3-arylbutyl)amine compound by homogeneous catalysis
    Patent number: 8791300
    Abstract: Compounds of the formula II can be hydrogenated to the corresponding butane derivatives in the presence of homogeneous cataslysts composed of metal salts or complexes containing metals selected from the group consisting of Rh, Ir, and Ru and preferably containing diphosphine ligands, with, in addition, excellent optical yields being achieved when one of R2 and R3 is not a hydrogen atom and the diphosphine ligand is chiral.
    Type: Grant
    Filed: May 1, 2008
    Date of Patent: July 29, 2014
    Assignee: Gruenenthal GmbH
    Inventors: Wolfgang Hell, Markus Kegel, Helmut Buschmann, Felix Spindler, Detlef Heller, Hans-Joachin Drexler
  • Process for Preparing a Substituted Dimethyl-(3-arylbutyl)amine Compound by Homogeneous Catalysis
    Publication number: 20090043132
    Abstract: Compounds of the formula II can be hydrogenated to the corresponding butane derivatives in the presence of homogeneous cataslysts composed of metal salts or complexes containing metals selected from the group consisting of Rh, Ir, and Ru and preferably containing diphosphine ligands, with, in addition, excellent optical yields being achieved when one of R2 and R3 is not a hydrogen atom and the diphosphine ligand is chiral.
    Type: Application
    Filed: May 1, 2008
    Publication date: February 12, 2009
    Applicant: Gruenenthal GmbH
    Inventors: Wolfgang Hell, Markus Kegel, Helmut Buschmann, Felix Spindler, Detlef Heller, Hans-Joachin Drexler