Patents by Inventor Claus Dreisbach

Claus Dreisbach 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).

  • 1,3-butadiene synthesis
    Patent number: 10384987
    Abstract: The invention relates to a process for preparing 1,3-butadiene by means of ene-yne metathesis over at least one transition metal catalyst of the element ruthenium.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: August 20, 2019
    Assignee: ARLANXEO DEUTSCHLAND GMBH
    Inventors: Claus Dreisbach, Stefan Schlenk, Martina Hoffmann, Christoph Larcher, Thomas Foellinger
  • 1,3-BUTADIENE SYNTHESIS
    Publication number: 20170327436
    Abstract: The invention relates to a process for preparing 1,3-butadiene by means of ene-yne metathesis over at least one transition metal catalyst of the element ruthenium.
    Type: Application
    Filed: December 15, 2015
    Publication date: November 16, 2017
    Applicant: ARLANXEO Deutschland GmbH
    Inventors: Claus DREISBACH, Stefan SCHLENK, Martina HOFFMANN, Christoph LARCHER, Thomas FOELLINGER
  • PROCESS FOR THE PREPARATION OF MENTHOL
    Publication number: 20140066664
    Abstract: The invention relates to a process for the preparation of 2-isopropyl-5-methylcyclohexanol (menthol) via the hydrogenation of thymol to neomenthol and the subsequent isomerization to give D/L (+/?)-menthol.
    Type: Application
    Filed: August 29, 2013
    Publication date: March 6, 2014
    Applicant: LANXESS Deutschland GmbH
    Inventors: Martin MECHELHOFF, Claus DREISBACH, Joerg-Dietrich JENTSCH, Lutz HEUER, Peter WASSERSCHEID, Anne RITTSTEIGER
  • PROCESS FOR THE PREPARATION OF MENTHOL
    Publication number: 20140066665
    Abstract: The invention relates to a process for the preparation of 2-isopropyl-5-methylcyclohexanol (D,L-menthol) via the hydrogenation of thymol to menthone and subsequent further hydrogenation to give D,L-menthol.
    Type: Application
    Filed: August 29, 2013
    Publication date: March 6, 2014
    Applicant: LANXESS DEUTSCHLAND GMBH
    Inventors: Martin MECHELHOFF, Claus DREISBACH, Joerg-Dietrich JENTSCH, Lutz HEUER, Peter WASSERSCHEID, Anne RITTSTEIGER
  • Process for reducing 3-heteroaryl-3-oxopropionic acid derivatives
    Patent number: 8293899
    Abstract: The present invention relates to a process for preparing stereoisomerically enriched 3-heteroaryl-3-hydroxycarboxylic esters by reducing 3-heteroaryl-3-oxocarboxylic esters in the presence of ruthenium-containing catalysts.
    Type: Grant
    Filed: February 27, 2003
    Date of Patent: October 23, 2012
    Assignee: Lanxess Deutschland GmbH
    Inventors: Boris Bosch, Markus Eckert, Hans-Christian Militzer, Claus Dreisbach
  • Process for preparing arylaminopropanols
    Patent number: 7893281
    Abstract: The invention relates to a process for preparing enantiomerically enriched aryl-aminopropanols and to their use and also to intermediates.
    Type: Grant
    Filed: July 28, 2009
    Date of Patent: February 22, 2011
    Assignee: Lanxess Deutschland GmbH
    Inventors: Markus Eckert, Claus Dreisbach, Boris Bosch, Andreas Stolle
  • PROCESS FOR PREPARING ARYLAMINOPROPANOLS
    Publication number: 20090286997
    Abstract: The invention relates to a process for preparing enantiomerically enriched aryl-aminopropanols and to their use and also to intermediates.
    Type: Application
    Filed: July 28, 2009
    Publication date: November 19, 2009
    Applicant: LANXESS DEUTSCHLAND GMBH
    Inventors: Markus Eckert, Claus Dreisbach, Boris Bosch, Andreas Stolle
  • Process for preparing arylaminopropanols
    Patent number: 7582776
    Abstract: The invention relates to a process for preparing enantiomerically enriched aryl-aminopropanols and to their use and also to intermediates.
    Type: Grant
    Filed: May 18, 2006
    Date of Patent: September 1, 2009
    Assignee: Lanxess Deutschland GmbH
    Inventors: Markus Eckert, Claus Dreisbach, Boris Bosch, Andreas Stolle
  • Process for preparing 3-heteroaryl-3-hydroxypropanoic acid derivatives
    Patent number: 7553970
    Abstract: The invention relates to a process for preparing enantiomer-enriched 3-heteroaryl-3-hydroxypropanoic acid derivatives and 3-heteroaryl-1-aminopropan-3-ols, and to their use.
    Type: Grant
    Filed: September 24, 2003
    Date of Patent: June 30, 2009
    Assignee: Lanxess Deutschland GmbH
    Inventors: Frank Berendes, Markus Eckert, Nils Brinkmann, Claus Dreisbach, Ruth Meissner, Rainhard Koch
  • Process for preparing arylaminopropanols
    Publication number: 20080262247
    Abstract: The invention relates to a process for preparing enantiomerically enriched arylaminopropanols and to their use and also to intermediates.
    Type: Application
    Filed: May 18, 2006
    Publication date: October 23, 2008
    Inventors: Markus Eckert, Claus Dreisbach, Boris Bosch, Andreas Stolle
  • Process for the preparation of 2-aminomethylpiperidine
    Publication number: 20080188665
    Abstract: The invention relates to a process for the preparation of aminomethylpyridines of the general formula (I) by hydrogenation of cyanopyridines of the general formula (II) with hydrogen under increased pressure optionally in the presence of a catalyst containing Ni, Fe or Co and optionally in the presence of ammonia.
    Type: Application
    Filed: December 20, 2007
    Publication date: August 7, 2008
    Inventors: Stefan Antons, Claus Dreisbach
  • Process for the racemate resolution of 3-aminopentanenitrile
    Patent number: 7193102
    Abstract: By means of a new process for the resolution of racemic 3-aminopentanenitrile, enantiomerically enriched 3-aminopentanenitrile or its salts can be obtained. For this, racemic 3-aminopentanenitrile is reacted with an enantiomerically enriched organic acid and one of the two diastereomeric salts formed is separated off and then converted into the enantiomerically enriched 3-aminopentanenitrile or its salts.
    Type: Grant
    Filed: October 21, 2003
    Date of Patent: March 20, 2007
    Assignee: Bayer Aktiengesellschaft
    Inventors: Claus Dreisbach, Björn Schlummer
  • Process for preparing arylaminopropanols
    Patent number: 7169938
    Abstract: The invention relates to a process for preparing enantiomerically enriched aryl-aminopropanols and to their use and also to intermediates.
    Type: Grant
    Filed: March 18, 2003
    Date of Patent: January 30, 2007
    Inventors: Markus Eckert, Claus Dreisbach, Boris Bosch, Andreas Stolle
  • Process for preparing 3-heteroaryl-3-hydroxypropanoic acid derivatives
    Publication number: 20060264641
    Abstract: The invention relates to a process for preparing enantiomer-enriched 3-heteroaryl-3-hydroxypropanoic acid derivatives and 3-heteroaryl-1-aminopropan-3-ols, and to their use.
    Type: Application
    Filed: May 18, 2006
    Publication date: November 23, 2006
    Inventors: Frank Berendes, Markus Eckert, Nils Brinkmann, Claus Dreisbach, Ruth Meissner, Rainhard Koch
  • Chiral monophosphorus compounds
    Publication number: 20060183930
    Abstract: The present invention relates to catalysts comprising chiral monophosphorus compounds and their use, the chiral monophosphorus compounds themselves and also their precursors.
    Type: Application
    Filed: April 10, 2006
    Publication date: August 17, 2006
    Inventors: Claus Dreisbach, Benjamin Meseguer, Thomas Prinz, Ulrich Scholz, Hans-Christian Militzer, Friederike Agel, Birgit Drieben-Holscher
  • Chiral monophosphorus compounds
    Patent number: 7057061
    Abstract: The present invention relates to catalysts comprising chiral monophosphorus compounds and their use, the chiral monophosphorus compounds themselves and also their precursors.
    Type: Grant
    Filed: September 27, 2002
    Date of Patent: June 6, 2006
    Assignee: Bayer Aktiengesellschaft
    Inventors: Claus Dreisbach, Benjamin Meseguer, Thomas Prinz, Ulrich Scholz, Hans-Christian Militzer, Friederike Agel, Birgit Drieβen-Hölscher
  • Process for the stereoselective preparation of functionalized vicinal diols
    Patent number: 7022503
    Abstract: The present invention relates to a process for the kinetic resolution of racemic functionalized epoxides in the presence of microorganisms, crude or pure preparations thereof comprising a polypeptide having epoxide hydrolase activity. Preferred microorganisms are yeasts and bacteria which may also be recombinant.
    Type: Grant
    Filed: September 9, 2002
    Date of Patent: April 4, 2006
    Assignees: Bayer Aktiengesellschaft, Forschungszentrum Juelich GmbH
    Inventors: Christian Wandrey, Murillo De Oliveira Villela Filho, Andreas Liese, Jan A. M. De Bont, Jan C. Verdoes, Carel A. G. M. Weijers, J. Hans Visser, Claus Dreisbach
  • Enantiomerically enriched 1-phenylethylamines
    Publication number: 20050131073
    Abstract: The present invention relates to a process for preparing nitro-substituted, enantiomerically enriched 1-phenylethylamines, and to their use.
    Type: Application
    Filed: August 4, 2004
    Publication date: June 16, 2005
    Inventors: Bjorn Schlummer, Claus Dreisbach, Alain Cotte
  • Biphenydiols
    Patent number: 6844462
    Abstract: The invention relates to the biphenyldiols of the formula (V) The corresponding racemic and enantiomerically pure triflate compounds thereof, where R1 and R2 are H, R3 is chlorine, and R4 is methoxy. In an alternate embodiment, R1 and R2 are hydrogen and R3 and R4 are C1-C4-alkoxy, fluorine, or chlorine.
    Type: Grant
    Filed: April 7, 2003
    Date of Patent: January 18, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventors: Birgit Drieben-Hölscher, Joachim Kralik, Inga Ritzkopf, Christian Steffens, Guido Giffels, Claus Dreisbach, Thomas Prinz
  • Process for preparing 3-heteroaryl-3-hydroxypropanoic acid derivatives
    Publication number: 20040181058
    Abstract: The invention relates to a process for preparing enantiomer-enriched 3-heteroaryl-3-hydroxypropanoic acid derivatives and 3-heteroaryl-1-aminopropan-3-ols, and to their use.
    Type: Application
    Filed: September 24, 2003
    Publication date: September 16, 2004
    Inventors: Frank Berendes, Markus Eckert, Nils Brinkmann, Claus Dreisbach, Ruth Meissner, Rainhard Koch