Patents by Inventor Albrecht Marhold

Albrecht Marhold 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).

  • Publication number: 20030092929
    Abstract: The present invention relates to 3-cyano-2,4,5-trifluorobenzoyl fluoride and to intermediates for its preparation and to the process for the preparation of 3-cyano-2,4,5-trifluoro-benzoyl fluoride, which starts from 5-fluoro-1,3-xylene (VIII); which is bichlorinated in the ring in the presence of a catalyst under ionic conditions to give 2,4-dichloro-5-fluoro-1,3-dimethylbenzene (VII). The latter is chlorinated in the side chains under free-radical conditions to give 2,4-dichloro-5-fluoro-3-dichloromethyl-1-trichloromethylbenzene (VI).
    Type: Application
    Filed: October 22, 2002
    Publication date: May 15, 2003
    Inventors: Albrecht Marhold, Peter Wolfrum
  • Publication number: 20030065135
    Abstract: The invention relates to a process for preparing polyfluoroalkyl-lithium compounds by deprotonation of polyfluoroalkyl compounds by means of lithium bases.
    Type: Application
    Filed: June 7, 2002
    Publication date: April 3, 2003
    Inventors: Marielouise Schneider, Albrecht Marhold, Alexander Kolomeitsev, Alexander Kadyrov, Gerd-Volker Roschenthaler, Jan Barten
  • Patent number: 6541675
    Abstract: The present invention relates to 3-cyano-2,4,5-trifluorobenzoyl fluoride and to intermediates for its preparation and to the process for the preparation of 3-cyano-2,4,5-trifluoro-benzoyl fluoride, which starts from 5-fluoro-1,3-xylene (VIII); which is bichlorinated in the ring in the presence of a catalyst under ionic conditions to give 2,4-dichloro-5-fluoro-1,3-dimethylbenzene (VII). The latter is chlorinated in the side chains under free-radical conditions to give 2,4-dichloro-5-fluoro-3-dichloromethyl-1-trichloromethylbenzene (VI).
    Type: Grant
    Filed: March 21, 2001
    Date of Patent: April 1, 2003
    Assignee: Bayer Corporation
    Inventors: Albrecht Marhold, Peter Wolfrum
  • Publication number: 20030055285
    Abstract: Trifluoromethyl-substituted biphenylcarboxylic acids are prepared by converting methyl-substituted biphenylcarbonitriles into the corresponding trichloromethyl-substituted biphenylcarbonitriles, converting the trichloromethyl group thereof to a trifluoromethyl group and thus obtaining trifluoromethyl-substituted biphenylcarbonitriles, and preparing the corresponding carboxylic acids therefrom by hydrolysis. A number of intermediates arising during this are novel compounds.
    Type: Application
    Filed: August 9, 2002
    Publication date: March 20, 2003
    Inventors: Peter Muller, Albrecht Marhold, Karen Peilstocker
  • Publication number: 20030036667
    Abstract: The present invention relates to the preparation of nuclear-fluorinated aromatics by reacting, with a fluoride at 40 to 260° C.
    Type: Application
    Filed: June 12, 2002
    Publication date: February 20, 2003
    Inventors: Marielouise Henrich, Albrecht Marhold, Alexander Kolomeitsev, Gerd Roschenthaler
  • Patent number: 6518296
    Abstract: The invention relates to novel substituted 3-thiocarbamoylpyrazoles of general formula (I), wherein m, n, R1, R2, R3 and Ar have the meanings cited in the description. The invention further relates to methods for the production and use thereof as pesticides.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: February 11, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Bernd Alig, Albrecht Marhold, Jörn Stölting, Wolfgang Gau, Christoph Erdelen, Andreas Turberg, Norbert Mencke, Olaf Hansen
  • Publication number: 20030027842
    Abstract: New halogenobenzimidazoles of the formula 1
    Type: Application
    Filed: February 4, 2002
    Publication date: February 6, 2003
    Inventors: Lutz Assmann, Albrecht Marhold, Ralf Tiemann, Klaus Stenzel
  • Publication number: 20030009060
    Abstract: This invention relates to 1,2-di(4-hydroxyaryl)tetrafluoroethanes of the general formula (I) 1
    Type: Application
    Filed: May 29, 2002
    Publication date: January 9, 2003
    Inventors: Albrecht Marhold, Kathe Baumann
  • Patent number: 6504059
    Abstract: Process for converting a nitrobenzene into a free aminophenol by catalytic reduction hydroxylation in the presence of an aqueous-acidic reaction medium.
    Type: Grant
    Filed: February 11, 1999
    Date of Patent: January 7, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Franz-Josef Mais, Albrecht Marhold, Guido Steffan
  • Patent number: 6465688
    Abstract: Trifluoromethyl-substituted biphenylcarboxylic acids are prepared by converting methyl-substituted biphenylcarbonitriles into the corresponding trichloromethyl-substituted biphenylcarbonitriles, converting the trichloromethyl group thereof to a trifluoromethyl group and thus obtaining trifluoromethyl-substituted biphenylcarbonitriles, and preparing the corresponding carboxylic acids therefrom by hydrolysis. A number of intermediates arising during this are novel compounds.
    Type: Grant
    Filed: January 8, 2002
    Date of Patent: October 15, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Peter Müller, Albrecht Marhold, Karen Peilstöcker
  • Patent number: 6462242
    Abstract: Benzyl alcohols, particularly those which bear fluorine substituents or fluoroalkyl substituents on the benzyl ring, can be obtained by formylation of corresponding aryl bromides to form benzaldehydes and reduction of the latter using further formate, wherein the benzaldehydes formed do not have to be isolated.
    Type: Grant
    Filed: June 5, 2000
    Date of Patent: October 8, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Torsten Neugebauer, Albrecht Marhold
  • Patent number: 6462218
    Abstract: The present invention relates to a process for preparing 3-cyano-2,4-dihalogeno-5-fluoro-benzoic acid, to intermediates for carrying out the process and to processes for preparing these intermediates.
    Type: Grant
    Filed: January 24, 2000
    Date of Patent: October 8, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Werner Hallenbach, Albrecht Marhold
  • Patent number: 6441239
    Abstract: The invention relates to a process for preparing 2-(4-trifluoromethoxyphenyl)ethylamine in an advantageous manner by (a) converting trifluoromethoxybenzene by halomethylation into halogenomethyl-1-trifluoromethoxybenzene, (b) converting the halogenomethyl-1-trifluoromethoxybenzene by halogen-cyano exchange into 4-(trifluoromethoxyphenyl)acetonitrile, and (c) reducing the 4-(trifluoromethoxyphenyl)acetonitrile using hydrogen in the presence of a nickel catalyst to form 2-(4-trifluoromethoxyphenyl)ethylamine. The first step of this process also represents an advantageous process for preparing 4-bromomethyl- and 4-chloromethyl-1-trifluoromethoxybenzene.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: August 27, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Albrecht Marhold, Peter Müller
  • Patent number: 6433210
    Abstract: The invention relates to a process for preparing substituted arylpyrazoles of the general formula (I) in which R1, R2, R3 and R4 are each as defined in the description, and to novel intermediates for preparing these arylpyrazoles.
    Type: Grant
    Filed: July 26, 2001
    Date of Patent: August 13, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Reinhard Lantzsch, Thomas Himmler, Albrecht Marhold
  • Publication number: 20020095052
    Abstract: Trifluoromethyl-substituted biphenylcarboxylic acids are prepared by converting methyl-substituted biphenylcarbonitriles into the corresponding trichloromethyl-substituted biphenylcarbonitriles, converting the trichloromethyl group thereof to a trifluoromethyl group and thus obtaining trifluoromethyl-substituted biphenylcarbonitriles, and preparing the corresponding carboxylic acids therefrom by hydrolysis. A number of intermediates arising during this are novel compounds.
    Type: Application
    Filed: January 8, 2002
    Publication date: July 18, 2002
    Inventors: Peter Muller, Albrecht Marhold, Karen Peilstocker
  • Patent number: 6420601
    Abstract: 3,5-Bis(trifluoromethyl)benzoyl chlorides optionally substituted with fluorine or chlorine are advantageously prepared by converting 3,5-dimethylbenzoic acids optionally substituted with fluorine or chlorine into the corresponding acid chlorides; completely free-radically chlorinating said chlorides in the side chains, giving 3,5-bis(trichloromethyl)benzoyl chlorides optionally substituted by fluorine or chlorine; fluorinating the latter with anhydrous hydrogen fluoride and/or antimony pentafluoride, giving 3,5-bis(trifluoromethyl)benzoyl fluorides optionally substituted with fluorine or chlorine; and then reacting the 3,5-bis(trifluoromethyl)benzoyl fluorides with silicon tetrachloride in the presence of a further Lewis acid. Some of the 3,5-bis(trihalogenomethyl) and 3,5-dimethylbenzoyl halides which arise as intermediates are novel compounds.
    Type: Grant
    Filed: January 25, 2001
    Date of Patent: July 16, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Albrecht Marhold, Jörn Stölting
  • Publication number: 20020086892
    Abstract: The present invention relates to novel biphenyloxazolines of the formula (I) 1
    Type: Application
    Filed: August 23, 1999
    Publication date: July 4, 2002
    Inventors: UDO KRAATZ, WOLFGANG KRAMER, ALBRECHT MARHOLD, CHRISTOPH ERDELEN, ULRIKE WACHENDORFF-NEUMANN, ANDREAS TURBERG, NORBERT MENCKE
  • Patent number: 6414000
    Abstract: The present invention relates to novel oxazoline derivatives of the formula (I) in which the radicals A, B, Q and R are each as defined in the description to processes for their preparation and to their use for controlling animal pests.
    Type: Grant
    Filed: October 12, 1999
    Date of Patent: July 2, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Wolfgang Krämer, Udo Kraatz, Reinhard Lantzsch, Albrecht Marhold, Christoph Erdelen, Ulrike Wachendorff-Neumann, Andreas Turberg, Norbert Mencke
  • Publication number: 20020082454
    Abstract: The invention relates to a process for preparing 2-(4-trifluoromethoxyphenyl)ethylamine in an advantageous manner by
    Type: Application
    Filed: December 20, 2001
    Publication date: June 27, 2002
    Inventors: Albrecht Marhold, Peter Muller
  • Patent number: 6410581
    Abstract: The present invention relates to novel biphenyloxazolines of the formula (I) in which X1, X2, X3, R1, R2 and R3 are each as defined in the description, to processes for their preparation and to the use of the biphenyloxazolines for controlling animal pests.
    Type: Grant
    Filed: August 23, 1999
    Date of Patent: June 25, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Udo Kraatz, Wolfgang Krämer, Albrecht Marhold, Christoph Erdelen, Ulrike Wachendorff-Neumann, Andreas Turberg, Norbert Mencke