Patents by Inventor Ralf Wischnat

Ralf Wischnat 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).

  • Method for the hydrolysis of quinolonecarboxylic esters
    Patent number: 11332444
    Abstract: Quinolonecarboxylic esters of the general formula (II) are hydrolyzed to quinolonecarboxylic acids of the general formula (I): The method comprises the step A): A) reacting compounds of the formula (II) with a mixture comprising acetic acid, sulfuric acid and water In step A), ?30 to ?40 mol of acetic acid, ?0.3 to ?1 mol of sulfuric acid and ?0.9 to ?2.5 mol of water are used per mole of compounds of the formula (II). The method is particularly suitable for the synthesis of the intermediate (I) in the synthesis of pradofloxacin.
    Type: Grant
    Filed: April 18, 2019
    Date of Patent: May 17, 2022
    Assignee: Bayer Animal Health GmbH
    Inventors: Peter Fey, Mathias Berwe, Joerg Wirths, Ralf Wischnat, Markus Longerich, Antje Dietzel
  • Trifluromethoxyphenyl-substituted tetramic acid derivatives pesticides and/or herbicides
    Patent number: 8507537
    Abstract: The present invention relates to novel trifluoromethoxyphenyl-substituted tetramic acid derivatives of the formula (I), in which J, X, Y, A, B, D and G have the meanings given above, to a number of processes for their preparation, and to their use as pesticides and/or herbicides. The invention further provides selective herbicidal compositions which comprise, firstly, trifluoromethoxyphenyl-substituted tetramic acid derivatives and, secondly, a crop plant compatibility-improving compound. The invention further relates to the boosting of the action of crop protection compositions comprising compounds of the formula (I) through the additions of ammonium salts or phosphonium salts and optionally penetrants.
    Type: Grant
    Filed: October 13, 2007
    Date of Patent: August 13, 2013
    Assignee: Bayer CropScience AG
    Inventors: Reiner Fischer, Stefan Lehr, Christian Arnold, Thomas Auler, Jan Dittgen, Dieter Feucht, Eva-Maria Franken, Waltraud Hempel, Martin Jeffrey Hills, Heinz Kehne, Peter Losel, Olga Malsam, Christopher Hugh Rosinger, Erich Sanwald, Ulrich Gorgens, Stefan Antons, Wolfgang Ebenbeck, Axel Pleschke, Marielouise Schneider, Ralf Wischnat
  • Process for preparing pradofloxacin
    Patent number: 8497377
    Abstract: The invention relates to an improved process for preparing pradofloxacin, in which the substituent in the 7 position is introduced by nucleophilic substitution in an N-methylpyrrolidone-ethanol solvent mixture.
    Type: Grant
    Filed: October 7, 2007
    Date of Patent: July 30, 2013
    Assignee: Bayer Intellectual Property GmbH
    Inventors: Thomas Adam, Ralf Wischnat, Klaus Weidemann
  • Trifluromethoxyphenyl-Substituted Tetramic Acid Derivatives Pesticides and/or Herbicides
    Publication number: 20120015807
    Abstract: The present invention relates to novel trifluoromethoxyphenyl-substituted tetramic acid derivatives of the formula (I), in which J, X, Y, A, B, D and G have the meanings given above, to a number of processes for their preparation, and to their use as pesticides and/or herbicides. The invention further provides selective herbicidal compositions which comprise, firstly, trifluoromethoxyphenyl-substituted tetramic acid derivatives and, secondly, a crop plant compatibility-improving compound. The invention further relates to the boosting of the action of crop protection compositions comprising compounds of the formula (I) through the additions of ammonium salts or phosphonium salts and optionally penetrants.
    Type: Application
    Filed: October 13, 2007
    Publication date: January 19, 2012
    Applicant: Bayer CropScience AG
    Inventors: Reiner Fischer, Stefan Lehr, Christian Arnold, Thomas Auler, Jan Dittgen, Dieter Feucht, Eva-Maria Franken, Waltraud Hempel, Martin Jeffrey Hills, Heinz Kehne, Peter Losel, Olga Malsam, Christopher Hugh Rosinger, Erich Sanwald, Ulrich Gorgens, Stefan Antons, Wolfgang Ebenbeck, Axel Pleschke, Marielouise Schneider, Ralf Wischnat
  • Pyrazolyl-substituted heterocycles and their use as phytosanitary products
    Patent number: 8058452
    Abstract: The present invention relates to novel pyrazolyl-substituted heterocycles of the formula (I) in which X, Y, Z and Het are as defined in the disclosure, to processes for their preparation, and to their use as pesticides, microbicides and herbicides.
    Type: Grant
    Filed: November 12, 2009
    Date of Patent: November 15, 2011
    Assignee: Bayer CropScience AG
    Inventors: Reiner Fischer, Astrid Ullmann, Thomas Bretschneider, Axel Trautwein, Ralf Wischnat, Christoph Erdelen, Angelika Lubos-Erdelen, legal representative, Dieter Feucht, Mark Wilhelm Drewes
  • Pyrazolyl-Substituted Heterocycles and Their Use as Phytosanitary Products
    Publication number: 20110143942
    Abstract: The present invention relates to novel pyrazolyl-substituted heterocycles of the formula (I) in which X, Y, Z and Het are as defined in the disclosure, to processes for their preparation, and to their use as pesticides, microbicides and herbicides.
    Type: Application
    Filed: February 11, 2011
    Publication date: June 16, 2011
    Inventors: Reiner Fischer, Astrid Ullmann, Thomas Bretschneider, Axel Trautwein, Ralf Wischnat, Christoph Erdelen, Angelika Lubos-Erdelen, Dieter Feucht, Mark Wilhelm Drewes
  • PYRAZOLYL-SUBSTITUTED HETEROCYCLES AND THEIR USE AS PHYTOSANITARY PRODUCTS
    Publication number: 20100062942
    Abstract: The present invention relates to novel pyrazolyl-substituted heterocycles of the formula (I) in which X, Y, Z and Het are as defined in the disclosure, to processes for their preparation, and to their use as pesticides, microbicides and herbicides.
    Type: Application
    Filed: November 12, 2009
    Publication date: March 11, 2010
    Inventors: Reiner Fischer, Astrid Ullmann, Thomas Bretschneider, Axel Trautwein, Ralf Wischnat, Christoph Erdelen, Angelika Lubos-Erdelen, Dieter Feucht, Mark Wilhelm Drewes
  • Pyrazolyl-substituted heterocycles and their use as phytosanitary products
    Patent number: 7642359
    Abstract: The present invention relates to novel pyrazolyl-substituted heterocycles of the formula (I) in which X, Y, Z and Het are as defined in the disclosure, to processes for their preparation, and to their use as pesticides, microbicides and herbicides.
    Type: Grant
    Filed: July 21, 2008
    Date of Patent: January 5, 2010
    Assignee: Bayer CropScience AG
    Inventors: Reiner Fischer, Astrid Ullmann, Thomas Bretschneider, Axel Trautwein, Ralf Wischnat, Christoph Erdelen, Angelika Lubos-Erdelen, legal representative, Dieter Feucht, Mark Wilhelm Drewes
  • PROCESS FOR PREPARING PRADOFLOXACIN
    Publication number: 20090318700
    Abstract: The invention relates to an improved process for preparing pradofloxacin, in which the substituent in the 7 position is introduced by nucleophilic substitution in an N-methylpyrrolidone-ethanol solvent mixture.
    Type: Application
    Filed: October 7, 2007
    Publication date: December 24, 2009
    Inventors: Thomas Adam, Ralf Wischnat, Klaus Weidemann
  • Phenyl-substituted 4-hydroxy-tetrahydropyridones
    Patent number: 7547660
    Abstract: The present invention relates to novel compounds of the formula (I) in which W, X, Y, Z, G, A, B, Q1, Q2 and D are each as defined in the disclosure, to a plurality of processes for their preparation and to their use as pesticides and herbicides.
    Type: Grant
    Filed: July 19, 2005
    Date of Patent: June 16, 2009
    Assignee: Bayer Aktiengesellschaft
    Inventors: Reiner Fischer, Alan Graff, Axel Trautwein, Astrid Ullmann, Udo Schneider, Ralf Wischnat, Mark Wilhelm Drewes, Christoph Erdelen, Dieter Feucht
  • Pyrazolyl-substituted heterocycles and their use as phytosanitary products
    Publication number: 20080293573
    Abstract: The present invention relates to novel pyrazolyl-substituted heterocycles of the formula (I) in which X, Y, Z and Het are as defined in the disclosure, to processes for their preparation, and to their use as pesticides, microbicides and herbicides.
    Type: Application
    Filed: July 21, 2008
    Publication date: November 27, 2008
    Inventors: Reiner Fischer, Astrid Ullmann, Thomas Bretschneider, Axel Trautwein, Ralf Wischnat, Christoph Erdelen, Angelika Lubos-Erdelen, Dieter Feucht, Mark Wilhelm Drewes
  • Pyrazolyl-substituted heterocycles and their use as phytosanitary products
    Patent number: 7435829
    Abstract: The present invention relates to novel pyrazolyl-substituted heterocycles of the formula (I) in which X, Y, Z and Het are as defined in the disclosure, to processes for their preparation, and to their use as pesticides, microbicides and herbicides.
    Type: Grant
    Filed: April 17, 2007
    Date of Patent: October 14, 2008
    Assignee: Bayer CropScience AG
    Inventors: Reiner Fischer, Astrid Ullmann, Thomas Bretschneider, Axel Trautwein, Ralf Wischnat, Angelika Lubos-Erdelen, legal representative, Dieter Feucht, Mark Wilhelm Drewes, Christoph Erdelen
  • Pyrazolyl-substituted heterocycles and their use as phytosanitary products
    Publication number: 20070203101
    Abstract: The present invention relates to novel pyrazolyl-substituted heterocycles of the formula (I) in which X, Y, Z and Het are as defined in the disclosure, to processes for their preparation, and to their use as pesticides, microbicides and herbicides.
    Type: Application
    Filed: April 17, 2007
    Publication date: August 30, 2007
    Inventors: Reiner Fischer, Astrid Ullmann, Thomas Bretschneider, Axel Trautwein, Ralf Wischnat, Christoph Erdelen, Angelika Lubos-Erdelen, Dieter Feucht, Mark Drewes
  • Pyrazolyl-substituted heterocycles and their use as phytosanitary products
    Patent number: 7230116
    Abstract: The present invention relates to novel pyrazolyl-substituted heterocycles of the formula (I) in which X, Y, Z and Het are as defined in the disclosure, to processes for their preparation, and to their use as pesticides, microbicides and herbicides.
    Type: Grant
    Filed: October 21, 2002
    Date of Patent: June 12, 2007
    Assignee: Bayer CropScience, AG
    Inventors: Reiner Fischer, Astrid Ullmann, Thomas Bretschneider, Axel Trautwein, Ralf Wischnat, Angelika Lubos-Erdelen, legal representative, Dieter Feucht, Mark Wilhelm Drewes, Christoph Erdelen, deceased
  • Condensation reagents and a process for their preparation
    Patent number: 7214801
    Abstract: The present invention relates to new bromo- and chlorothiazolium salts of the formula (I) in which R1, R2, R3, R4, n and X? have the meaning indicated in the disclosure, a process for their preparation, their use as condensation reagents, particularly as peptide coupling reagents, and intermediates for the preparation of these compounds.
    Type: Grant
    Filed: August 3, 2005
    Date of Patent: May 8, 2007
    Assignee: LANXESS Deutschland GmbH
    Inventors: Joachim Rudolph, Ralf Wischnat
  • Aryl-substituted heterocyclic enaminones
    Patent number: 7186829
    Abstract: The invention relates to novel heterocyclic enaminones of the general formula (I) in which Ar, Z, K, X, Y1, Y2, Y3, Y4, Y5, Y6 and V are as defined in the description, to their use as herbicides, acaricides and insecticides, and to processes for their preparation.
    Type: Grant
    Filed: November 21, 2000
    Date of Patent: March 6, 2007
    Assignee: Bayer Aktiengesellschaft
    Inventors: Reiner Fischer, Ralf Wischnat, Jutta Böhmer, Axel Trautwein, Jürgen Wiedemann, Udo Schneider, Hermann Hagemann, Mark Wilhelm Drewes, Peter Dahmen, Rolf Pontzen, Dieter Feucht, Christoph Erdelen, Peter Lösel
  • Substituted 2-thio-3,5-dicyano-4-phenyl-6-aminopyridines and the use of the same
    Publication number: 20060217373
    Abstract: Compounds of the formula (I) a process for their preparation and their use as medicaments are described.
    Type: Application
    Filed: May 30, 2006
    Publication date: September 28, 2006
    Applicant: Bayer Healthcare AG
    Inventors: Ulrich Rosentreter, Thomas Kramer, Mitsuyuki Shimada, Walter Hubsch, Nicole Diedrichs, Thomas Krahn, Kerstin Henninger, Johannes-Peter Stasch, Ralf Wischnat
  • Substituted 2-thio-3,5-dicyano-4-phenyl-6-aminopyridines and the use of the same
    Patent number: 7109218
    Abstract: Compounds of the formula (I) a process for their preparation and their use as medicaments are described.
    Type: Grant
    Filed: November 28, 2002
    Date of Patent: September 19, 2006
    Assignee: Bayer HealthCare AG
    Inventors: Ulrich Rosentreter, Thomas Krämer, Mitsuyuki Shimada, Walter Hübsch, Nicole Diedrichs, Thomas Krahn, Kerstin Henninger, Johannes-Peter Stasch, Ralf Wischnat
  • Condensation reagents and a process for their preparation
    Patent number: 7064216
    Abstract: The present invention relates to new bromo- and chlorothiazolium salts of the formula (I) in which R1, R2, R3, R4, n and X? have the meaning indicated in the disclosure, a process for their preparation, their use as condensation reagents, particularly as peptide coupling reagents, and intermediates for the preparation of these compounds.
    Type: Grant
    Filed: December 18, 2001
    Date of Patent: June 20, 2006
    Assignee: Bayer Aktiengesellschaft
    Inventors: Joachim Rudolph, Ralf Wischnat
  • Phenyl-substituted 2-enamino-ketonitriles
    Patent number: 7049271
    Abstract: The present invention relates to novel phenyl-substituted 2-enamino-ketonitriles of the formula (I): in which Ar, X, Z, Y and K are each as defined in the description, to a plurality of processes for their preparation and to their use as herbicides and pesticides.
    Type: Grant
    Filed: April 25, 2001
    Date of Patent: May 23, 2006
    Assignee: Bayer Aktiengesellschaft
    Inventors: Reiner Fischer, Jutta Böhmer, Ralf Wischnat, Mark Wilhelm Drewes, Peter Dahmen, Rolf Pontzen, Peter Lösel, Christoph Erdelen, Dieter Feucht