Patents by Inventor Hans Joachim Drexler

Hans Joachim 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).

  • RHODIUM-PHOSPHORUS COMPLEXES AND THEIR USE IN RING OPENING REACTIONS
    Publication number: 20110004005
    Abstract: The present invention is directed to novel rhodium-phosphorus complexes of formula: [Rh(PP?)(solv)2]X the process for their preparation and their use as catalysts in the ring opening reaction of heteronorbornenes and other ?,?-unsaturated compounds.
    Type: Application
    Filed: December 3, 2008
    Publication date: January 6, 2011
    Applicant: Laboratorios Del Dr. Esteve, S.A.
    Inventors: Detfleff Heller, Hans-Joachim Drexler, Angelika Preetz, Antoni Torrens Jover, Helmut Heinrich Buschmann
  • Process for producing 6-dimethylaminomethyl-phenyl-cyclohexane-1,3-diols
    Patent number: 7858826
    Abstract: A process for producing 6-dimethylaminomethyl-1-(3-hydroxy- or 3-C1-C4 alkoxyphenyl)-cyclohexane-1,3-diols from 6-dimethylaminomethyl-1-hydroxy-1-(3-hydroxy- or 3-C1-C4 alkoxyphenyl)-cyclohexane-3-ones by catalytic hydrogenation in the presence of heterogeneous or homogeneous catalysts, or by using metal hydrides.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: December 28, 2010
    Assignee: Gruenenthal GmbH
    Inventors: Wolfgang Hell, Oswald Zimmer, Markus Kegel, Olaf Schaefer, Felix Spindler, Anita Schnyder, Urs Siegrist, Detlef Heller, Hans-Joachim Drexler
  • Process for Producing 6-Dimethylaminomethyl-phenyl-cyclohexane-1,3-diols
    Publication number: 20090227813
    Abstract: A process for producing 6-dimethylaminomethyl-1-(3-hydroxy- or 3-C1-C4 alkoxyphenyl)-cyclohexane-1,3-diols from 6-dimethylaminomethyl-1-hydroxy-1-(3-hydroxy- or 3-C1-C4 alkoxyphenyl)-cyclohexane-3-ones by catalytic hydrogenation in the presence of heterogeneous or homogeneous catalysts, or by using metal hydrides.
    Type: Application
    Filed: February 27, 2009
    Publication date: September 10, 2009
    Applicant: Gruenenthal GmbH
    Inventors: Wolfgang Hell, Oswald Zimmer, Markus Kegel, Olaf Schaefer, Felix Spindler, Anita Schnyder, Urs Siegrist, Detlef Heller, Hans-Joachim Drexler
  • Process for the preparation of substituted 3-aryl-butylamine compounds
    Patent number: 7417170
    Abstract: Methods for the dehydration of substituted 1-amino-3-aryl-butan-3-ol compounds for the preparation of substituted 3-aryl-butyl-amine compounds.
    Type: Grant
    Filed: December 6, 2005
    Date of Patent: August 26, 2008
    Assignee: Gruenenthal GmbH
    Inventors: Wolfgang Hell, Markus Kegel, Bernhard Akteries, Helmut Buschmann, Jorg Holenz, Harmut Loebermann, Detlef Heller, Hans-Joachim Drexler, Stefan Gladow
  • N-phenyl-pyrrol bisphosphane compounds and the metal complexes of the same
    Patent number: 7109346
    Abstract: N-Phenylpyrrolebisphosphines of the formula I metal complexes of these N-phenylpyrrolebisphosphines and their use in metal-catalyzed reactions.
    Type: Grant
    Filed: December 12, 2001
    Date of Patent: September 19, 2006
    Assignee: OXENO Olefinchemie GmbH & Co. KG
    Inventors: Matthias Beller, Ralf Jackstell, Holger Klein, Detlef Heller, Hans-Joachim Drexler, Klaus-Diether Wiese, Dirk Roettger
  • Process for the preparation of substitued 3-aryl-butylamine compounds
    Publication number: 20060194988
    Abstract: Methods for the dehydration of substituted 1-amino-3-aryl-butan-3-ol compounds for the preparation of substituted 3-aryl-butyl-amine compounds.
    Type: Application
    Filed: December 6, 2005
    Publication date: August 31, 2006
    Inventors: Wolfgang Hell, Markus Kegel, Berhard Akteries, Helmut Buschmann, Joerg Holenz, Harmut Loebermann, Detlef Heller, Hans-Joachim Drexler, Stefan Gladow
  • Process for obtaining enantiomers of thienylazolylalcoxyethanamines
    Patent number: 6979742
    Abstract: A process is described for the preparation of a precursor alcohol of (±)-2-[thienyl(1-methyl-1H-pyrazol-5-yl)methoxy]-N,N-dimethyletanamine, and more generally for thyenylazolylalcoxyethanamines and their enantiomers. The process involves the asymmetric reduction of a prochiral ketone in the presence of a chiral ruthenium (II) catalyst system comprising at least a bidentate phosphorous-containing ligand and a diamine ligand to yield chiral alcohols. The chiral alcohols are further O-alkylated to yield corresponding pharmaceutically active ethanamines.
    Type: Grant
    Filed: January 24, 2005
    Date of Patent: December 27, 2005
    Assignee: Laboratorios del Dr. Esteve, S.A.
    Inventors: Antoni Torrens Jover, Helmut H. Buschmann, Detleff Heller, Hans Joachim Drexler
  • Novel n-phenyl-pyrrol bisphosphane compounds and the metal complexes of the same
    Publication number: 20040116713
    Abstract: N-Phenylpyrrolebisphosphines of the formula I 1
    Type: Application
    Filed: January 20, 2004
    Publication date: June 17, 2004
    Inventors: Matthias Beller, Ralf Jackstell, Holger Klein, Detlef Heller, Hans-Joachim Drexler, Klaus-Diether Wiese, Dirk Rottger