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).

  • Patent number: 6075165
    Abstract: Process for the preparation of polyhalogenated benzotrifluorides, benzotrichlorides and benzoyl chlorides and new trihalogeno-benzotrichlorides and -benzoyl chloridesPolyhalogenated benzotrifluorides can be reacted with chlorides from the series of Friedel-Crafts catalysts to give the corresponding benzotrichlorides, which can be hydrolysed by water in the presence of iron(III) chloride to give the corresponding benzoyl chlorides. These are suitable as intermediate products for the preparation of active compounds for medicaments and feed additives.
    Type: Grant
    Filed: June 26, 1996
    Date of Patent: June 13, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Albrecht Marhold, Peter Andres
  • Patent number: 6060605
    Abstract: The invention relates to a process for preparing substituted arylpyrazoles of the general formula (I) ##STR1## in which R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each as defined in the description, and to novel intermediates for preparing these arylpyrazoles.
    Type: Grant
    Filed: November 5, 1998
    Date of Patent: May 9, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Reinhard Lantzsch, Thomas Himmler, Albrecht Marhold
  • Patent number: 6031134
    Abstract: The invention relates to a novel process for the preparation of 2-amino-2-arylehanols of the formula (I) ##STR1## in which Ar represents aryl or hetaryl each unsubstituted or identically or differently monosubstituted to pentasubstituted, where as substituents there may be mentioned:halogen, alkyl, halogenoalkyl, alkoxy, halogenoalkoxy, unsubstituted or substituted cycloalkyloxy or unsubstituted or substituted phenyl,which comprises catalytically hydrogenating .alpha.-hydroxyketoximes of the formula (II) ##STR2## in which Ar has the meaning given above,using Raney nickel or Raney cobalt in the presence of a diluent and in the presence of a base andnovel 2-amino-2-arylethanols and novel .alpha.-hydroxyketoximes.
    Type: Grant
    Filed: November 4, 1998
    Date of Patent: February 29, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Reinhard Lantzsch, Ernst Kysela, Albrecht Marhold
  • Patent number: 6031107
    Abstract: The invention relates to new fluoromethoxyacrylic acid derivatives, a process for their preparation and their use as pesticides, as well as to new intermediates and a plurality of processes for their preparation.It has already been disclosed that certain fluoromethoxyacrylic acid derivatives which are similar in constitution to the compounds described below have fungicidal properties (compare, for example, WO 9517376). The fungicidal action of these compounds, however, is unsatisfactory in many cases.
    Type: Grant
    Filed: April 16, 1998
    Date of Patent: February 29, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ulrich Heinemann, Herbert Gayer, Peter Gerdes, Albrecht Marhold, Uwe Stelzer, Ralf Tiemann, Klaus Stenzel, Stefan Dutzmann
  • Patent number: 6022995
    Abstract: The invention relates to a novel process for the preparation of 2-amino-2-arylethanols of the formula (I) ##STR1## in which Ar represents aryl or hetaryl each unsubstituted or identically or differently monosubstituted to pentasubstituted, where as substituents there may be mentioned:halogen, alkyl, halogenoalkyl, alkoxy, halogenoalkoxy, unsubstituted or substituted cycloalkyloxy or unsubstituted or substituted phenyl,which comprises catalytically hydrogenating .alpha.-hydroxyketoximes of the formula (II) ##STR2## in which Ar has the meaning given above,using Raney nickel or Raney cobalt in the presence of a diluent and in the presence of a base andnovel 2-amino-2-arylethanols and novel .alpha.-hydroxyketoximes.
    Type: Grant
    Filed: September 27, 1996
    Date of Patent: February 8, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Reinhard Lantzsch, Ernst Kysela, Albrecht Marhold
  • Patent number: 6020354
    Abstract: New halogenobenzimidazoles of the formula in whichA, R.sup.1, R.sup.2, R.sup.3, R.sup.4 and X have the meanings given in the description,and their acid addition salts and metal salt complexes,a process for their preparation and their use as microbicides in crop protection and in the protection of materials.New intermediates of the formula ##STR1## in which R.sup.12 -R.sup.17 and X have the meanings given in the description,and processes for the preparation of these substances.
    Type: Grant
    Filed: January 28, 1998
    Date of Patent: February 1, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Lutz Assmann, Albrecht Marhold, Ralf Tiemann, Klaus Stenzel
  • Patent number: 6002053
    Abstract: 4,4,5,5,5-Pentafluoro-1-pentanol is prepared in a particularly advantageous manner from perfluoroethyl iodide by initially adding perfluoroethyl iodide in the presence of a radical initiator which does not carry any acyl groups to allyl alcohol and then hydrogenolytically dehalogenating the resulting 4,4,5,5,5-pentafluoro-2-iodo-1-pentanol in the presence of a catalyst, an acid binder and a diluent.
    Type: Grant
    Filed: September 18, 1998
    Date of Patent: December 14, 1999
    Assignee: Bayer Aktiengesellschaft
    Inventors: Michael-Harold Rock, Albrecht Marhold
  • Patent number: 5998667
    Abstract: The invention relates to new substituted biphenyloxazolines of the formula (I) ##STR1## in which R.sup.1 represents C.sub.1 -C.sub.6 -halogenoalkylthio andR.sup.2 represents hydrogen, orR.sup.1 and R.sup.2 together with the carbon atoms to which they are bonded form a halogen-substituted 5- or 6-membered heterocyclic ring,X represents hydrogen, halogen, C.sub.1 -C.sub.6 -alkyl or C.sub.1 -C.sub.
    Type: Grant
    Filed: June 4, 1998
    Date of Patent: December 7, 1999
    Assignee: Bayer Aktiengesellschaft
    Inventors: Reinhard Lantzsch, Albrecht Marhold, Christoph Erdelen
  • Patent number: 5990316
    Abstract: New benzimidazole derivatives of the formula ##STR1## in which R represents cyano or the group ##STR2## X.sup.1, X.sup.2, X.sup.3 and X.sup.4 are identical or different and represent halogen;Y represents alkyl, alkenyl or alkinyl, each of which is optionally substituted by halogen; or represents optionally substituted phenylalkyl or in each case optionally substituted cycloalkyl and cycloalkenyl; andZ represents hydrogen or halogen,a process for the preparation of these substances, and their use for controlling pests. New intermediates and processes for their preparation.
    Type: Grant
    Filed: May 4, 1998
    Date of Patent: November 23, 1999
    Assignee: Bayer Aktiengesellschaft
    Inventors: Lutz Assmann, Albrecht Marhold, Heinz-Wilhelm Dehne, Gerd Hanssler, Klaus Stenzel, Ulrike Wachendorff-Neumann
  • Patent number: 5973162
    Abstract: The invention relates to novel substituted thiazolines of the formula (I) ##STR1## in which Ar.sup.1 and Ar.sup.2 each represent independently of one another optionally substituted phenyl, processes for their preparation, and their use for controlling animal pests.
    Type: Grant
    Filed: February 23, 1999
    Date of Patent: October 26, 1999
    Assignee: Bayer Aktiengesellschaft
    Inventors: Bernd Alig, Udo Kraatz, Wolfgang Kramer, Reinhard Lantzsch, Albrecht Marhold, Christoph Erdelen, Ulrike Wachendorff-Neumann, Andreas Turberg, Norbert Mencke
  • Patent number: 5969197
    Abstract: Avoiding hexachlorobutadiene as the starting material, 2-chloro- and 2,3-dichloro-1,1,1,4,4,4-hexafluoro-2-butene are prepared by reacting a chlorobutene derivative of the formula (I)Cl.sub.2 C.dbd.CH-X (I)in whichX represents CCl.dbd.CCl.sub.2 or CCl.sub.2 --CCl.sub.2 H with hydrogen fluoride and chlorine in the presence of a catalyst at temperatures in the range of 50 to 550.degree. C.
    Type: Grant
    Filed: June 9, 1994
    Date of Patent: October 19, 1999
    Assignee: Bayer Aktiengesellschaft
    Inventors: Norbert Lui, Albrecht Marhold, Dietmar Bielefeldt
  • Patent number: 5969147
    Abstract: New pesticidal substituted biphenyloxazolines of the formula (I) in whichA, B, X, m and n have the meanings stated in the description, and new intermediates therefor.
    Type: Grant
    Filed: November 12, 1998
    Date of Patent: October 19, 1999
    Assignees: Bayer Aktiengesellschaft, Yashima Chemical Industry Co., Ltd
    Inventors: Reinhard Lantzsch, Albrecht Marhold, Wolfgang Kramer, Christoph Erdelen, Ulrike Wachendorff-Neumann, Andreas Turberg, Norbert Mencke
  • Patent number: 5939441
    Abstract: The invention relates to new substituted pyridylpyrazoles of the general formula (I) ##STR1## in which n represents the number 0, 1 or 2,to a plurality of processes for their preparation, to their use as pesticides and for combating arthropods, and to a new intermediate.
    Type: Grant
    Filed: April 18, 1995
    Date of Patent: August 17, 1999
    Assignee: Bayer Aktiengesellschaft
    Inventors: Jorg Stetter, Bernd Alig, Albrecht Marhold, Norbert Mencke, Klaus Mrusek, Andreas Turberg
  • Patent number: 5936102
    Abstract: The present invention is drawn to a process for preparing a 2,2,3,3-tetrafluoro-1,4-benzodioxane, by cyclocondensing a o-(2-bromo-tetrafluoroethoxy)-phenol in the presence of an acid binder.
    Type: Grant
    Filed: July 23, 1998
    Date of Patent: August 10, 1999
    Assignee: Bayer Aktiengesellschaft
    Inventors: Vera Yakovlevna Popkova, Albrecht Marhold
  • Patent number: 5932605
    Abstract: Novel substituted benzimidazoles of the formula ##STR1## in which Q, R, X and Z have the meanings given in the description,a process for the preparation of the novel substances and their use for combating pests.
    Type: Grant
    Filed: November 18, 1997
    Date of Patent: August 3, 1999
    Assignee: Bayer Aktiengesellschaft
    Inventors: Lutz Assmann, Albrecht Marhold, Heinz-Wilhelm Dehne, Stefan Dutzmann, Christoph Erdelen, Klaus Stenzel
  • Patent number: 5925663
    Abstract: Novel benzimidazole derivatives of the formula ##STR1## R.sup.1, R.sup.2, X.sup.1, X.sup.2, X.sup.3, X.sup.4 and Y are each as defined in the description,and metal salt complexes thereof,a process for preparing these compounds and their use as microbicides in crop protection and in teh protection of materials.
    Type: Grant
    Filed: October 3, 1997
    Date of Patent: July 20, 1999
    Assignee: Bayer Aktiengesellschaft
    Inventors: Lutz Assmann, Albrecht Marhold, Klaus Stenzel, Martin Kugler
  • Patent number: 5925788
    Abstract: 2-Trifluoromethoxy-benzenesulphonamide, of the formula (I), ##STR1## which can be used as intermediate for the preparation of certain herbicidally active compounds is obtained in very high yield and high purity by a process in which halogenated trifluoromethoxy-benzenesulphonamides of the general formula (II) ##STR2## in which X.sup.1 represents halogen and X.sup.2 represents hydrogen or halogenare reacted with hydrogen in the presence of a catalyst and in the presence of a diluent and, if appropriate, in the presence of an acid acceptor at temperatures between 0.degree. C. and 200.degree. C. ("dehalogenated"), the resulting compound of the formula (I) is isolated in the customary manner in the event that "X.sup.2 =halogen" and converted into a pure, crystalline product by treating it with a protic polar organic liquid and isolated by removing the liquid component by means of filtration with suction in the event that "X.sup.2 =H".
    Type: Grant
    Filed: May 14, 1998
    Date of Patent: July 20, 1999
    Assignee: Bayer Aktiengesellschaft
    Inventors: Reinhard Lantzsch, Albrecht Marhold, Ernst Kysela
  • Patent number: 5900509
    Abstract: p-Haloalkoxyanilines are obtained from the corresponding nitrobenzenes by catalytic hydroxylation in the presence of an aqueous acidic reaction medium with the formation of a corresponding aminophenol and reaction of this aminophenol with a halogenated olefin in the presence of water and a catalytic amount of base.
    Type: Grant
    Filed: January 16, 1998
    Date of Patent: May 4, 1999
    Assignee: Bayer Aktiengesellschaft
    Inventors: Franz-Josef Mais, Albrecht Marhold, Guido Steffan
  • Patent number: 5874655
    Abstract: Chlorinated aromatics are obtained in a simple manner and in particularly good yield if the corresponding chloroformic esters are heated in the liquid phase to 90.degree. to 240.degree. C. in the presence of an inert organic solvent and a catalytic amount of one or more Lewis acids selected from the group consisting of the aluminium halides, iron halides and antimony halides.
    Type: Grant
    Filed: March 6, 1997
    Date of Patent: February 23, 1999
    Assignee: Bayer Aktiengesellschaft
    Inventors: Norbert Lui, Albrecht Marhold
  • Patent number: 5863933
    Abstract: The invention relates to new substituted benzimidazole of the general formula (I) ##STR1## in which R.sup.1 represents hydrogen, alkyl, alkoxy or optionally substituted aryl,R.sup.2 represents hydroxyl, cyano or in each case optionally substituted alkyl, alkenyl, alkinyl, alkoxy, alkenyloxy, alkinyloxy, alkylthio, amino, aminocarbonyl, alkylcarbonyl, alkoxycarbonyl, alkoxycarbonyloxy, dialkoxyphosphonyl, (hetero)aryl, (hetero)arylcarbonyl, (hetero)aryloxycarbonyl, (hetero)arylcarbonyloxy or (hetero)arylaminocarbonylaminocarbonyloxy, andR.sup.3 represents fluoroalkyl,X.sup.1, X.sup.2, X.sup.3 and X.sup.
    Type: Grant
    Filed: March 19, 1997
    Date of Patent: January 26, 1999
    Assignee: Bayer Aktiengesellschaft
    Inventors: Winfried Lunkenheimer, Bernd Baasner, Folker Lieb, Stefan Bohm, Albrecht Marhold, Ulrich Gorgens, Wilhelm Stendel, Heinz-Wilhelm Dehne, Hans-Joachim Santel