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).

  • Process for preparing fluorine-containing phenethylamines and novel fluorine-containing &bgr;-iminovinyl-and &bgr;-iminoethylbenzenes
    Patent number: 6232475
    Abstract: The present invention relates to a process for preparing fluorine-containing phenethylamines which is characterized in that, in a first step, a substituted bromobenzene is reacted with an N-vinylimide in the presence of a palladium catalyst, in a second step, the resulting substituted &bgr;-iminovinylbenzene is hydrogenated catalytically and in a third step, the substituted &bgr;-iminovinylbenzene obtained in the second step is cleaved. This process also provides access to novel &bgr;-iminovinyl- and &bgr;-iminoethylbenzenes.
    Type: Grant
    Filed: December 16, 1999
    Date of Patent: May 15, 2001
    Assignee: Bayer Aktiengesellschaft
    Inventors: Peter Müller, Albrecht Marhold
  • 3-cyano-2,4,5-trifluoro-benzoyl fluoride and intermediate products for the production thereof
    Patent number: 6229040
    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: October 15, 1999
    Date of Patent: May 8, 2001
    Assignee: Bayer Aktiengesellschaft
    Inventors: Albrecht Marhold, Peter Wolfrum
  • Process for the preparation of 3-substituted 4-cyano-pyrrole compounds
    Patent number: 6204397
    Abstract: A process for the preparation of 3-substituted 4-cyano-pyrrole compounds of the formula (I) in which Ar has the meaning given in the description, by reaction in a 1st stage of bromides (II) Ar—Br  (II) with acrylonitrile in the presence of a solvent and a suitable reaction auxiliary to give acrylonitrile derivatives (III) Ar—CH═CH—CN  (III) and in a 2nd stage with a phenylsulphonylmethyl isocyanide (IV) Ph—SO2—CH2—CN  (IV) in the presence of a solvent and optionally in the presence of a suitable reaction auxiliary, characterised in that the the 1st stage is carried out in the presence of a palladium catalyst and the 2nd stage in the presence of a 1.2- to 1.8-fold molar excess of alkali metal alcoholate or alkali metal hydroxide.
    Type: Grant
    Filed: July 1, 1993
    Date of Patent: March 20, 2001
    Assignee: Bayer Aktiengesellschaft
    Inventors: Peter C. Knüppel, Reinhard Lantzsch, Klaus Jelich, Peter Andres, Albrecht Marhold
  • Method for preparing acetophenones with a fluoralkyl-substituted aromatic nucleus
    Patent number: 6184417
    Abstract: Acetophenones which are substituted on the aromatic ring by fluoroalkyl are prepared in a particularly advantageous, environmentally friendly and effective manner from fluoroalkylanilines and acetaldoxime by preparing from a fluoroalkylaniline a corresponding diazonium salt solution, and reacting this with acetaldoxime in the presence of at least one copper compound, without adding any buffer salts or reducing agents, carrying out the reaction at from 20 to 50° C. and in the presence of halide ions and subsequently heating to a temperature in the range from 70 to 110° C.
    Type: Grant
    Filed: November 1, 1999
    Date of Patent: February 6, 2001
    Assignee: Bayer Aktiengesellschaft
    Inventors: Wulf Kühnle, Albrecht Marhold, Guido Steffan
  • Process for preparing perfluoroalkyl aryl sulfides and novel perfluoroalkyl aryl sulfides
    Patent number: 6175042
    Abstract: This invention relates to a process for preparing perfluoroalkyl aryl sulfides by reaction of disulfides with alkali metal salts of aliphatic perfluorocarboxylic acids in the presence of a high-boiling aprotic solvent at elevated temperature and reduced pressure, wherein the product formed is distilled off at the rate at which it is formed. This invention further relates to the novel compounds 2-nitrophenyl pentafluoroethyl sulfide and 2-aminophenyl pentafluoroethyl sulfide.
    Type: Grant
    Filed: May 28, 1999
    Date of Patent: January 16, 2001
    Assignee: Bayer Aktiengesellschaft
    Inventors: Vera Yakovlevna Popkova, Albrecht Marhold
  • Substituted biphenyloxazolines
    Patent number: 6172093
    Abstract: New pesticidal substituted biphenytoxazolines of the formula (I) in which A, B, X, m and n have the meanings stated in the description, and new intermediates therefor.
    Type: Grant
    Filed: August 4, 1995
    Date of Patent: January 9, 2001
    Assignees: Bayer Aktiengesellschaft, Yashima Chemical Industry Co., LTD
    Inventors: Reinhard Lantzsch, Albrecht Marhold, Wolfgang Kr{umlaut over (a)}mer, Christoph Erdelen, Ulrike Wachendorff-Neumann, Andreas Turberg, Norbert Mencke
  • Method for producing .alpha.-alkoxy-.alpha.-trifluoromethyl-aryl acetic esters and -aryl acetic acids
    Patent number: 6162943
    Abstract: Process for the preparation of .alpha.-alkoxy-.alpha.-trifluoromethyl-arylacetic esters of the formula (I) ##STR1## wherein R is a component selected from the group consisting of C.sub.1 -C.sub.6 -alkyl, C.sub.2 -C.sub.6 -alkenyl, C.sub.3 -C.sub.7 -cycloalkyl, C.sub.6 -C.sub.10 -aryl and C.sub.1 -C.sub.6 -halogenoalkyl, R' is selected from the group consisting of C.sub.1 -C.sub.4 -alkyl, X is selected from the group consisting of halogen, C.sub.1 -C.sub.4 -alkyl, C.sub.2 -C.sub.4 -alkenyl, C.sub.6 -C.sub.10 -aryl or C.sub.1 -C.sub.4 -alkoxy and nitro, and n is zero or an integer from 1 to 3.
    Type: Grant
    Filed: April 16, 1999
    Date of Patent: December 19, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Norbert Lui, Albrecht Marhold
  • Method for producing aromatic nitriles
    Patent number: 6162942
    Abstract: A process for preparing aromatic nitriles from corresponding chloroaromatics by reaction with cyanides.
    Type: Grant
    Filed: August 17, 1999
    Date of Patent: December 19, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Michael-Harold Rock, Albrecht Marhold
  • Process for the preparation of bistrifluoromethylbenzylamines
    Patent number: 6137011
    Abstract: Bistrifluoromethylbenzylamines are obtained in a simple manner in high purities and with good yields by catalytic hydrogenation of the corresponding bistrifluoromethylbenzonitriles if the process is carried out in the presence of Raney cobalt, at least one aliphatic ether and ammonia.
    Type: Grant
    Filed: February 25, 2000
    Date of Patent: October 24, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Albrecht Marhold, Ernst Kysela
  • Process for preparing fluorinated benzyl alcohols and fluorinated benzaldehydes
    Patent number: 6127581
    Abstract: Fluorinated benzaldehydes are obtainable in a simple and inexpensive manner and in significantly improved yields when chlorinated benzaldehydes are reacted with alkali metal fluorides at temperatures in the range from about 130 to 200.degree. C. in the presence of less than about 2 mol % of quaternary phosphonium salts, based on chlorine atoms to be replaced, at initial concentrations of more than 2.5 mol of the chlorinated benzaldehydes per kg of dipolar aprotic solvent. Fluorinated benzaldehydes obtained in this way can advantageously be hydrogenated with hydrogen in the presence of noble metal catalysts to give fluorinated benzyl alcohols.
    Type: Grant
    Filed: August 6, 1999
    Date of Patent: October 3, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Jurgen Wiedemann, Albrecht Marhold, Claus Dreisbach
  • Halobenzimidazoles and their use as microbicides
    Patent number: 6127547
    Abstract: New halogenobenzimidazoles of the formula ##STR1## in which A, 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 ##STR2## 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: August 25, 1999
    Date of Patent: October 3, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Lutz Assmann, Albrecht Marhold, Ralf Tiemann, Klaus Stenzel
  • Process for producing substituted arylpyrazoles
    Patent number: 6118031
    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: August 6, 1999
    Date of Patent: September 12, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Reinhard Lantzsch, Thomas Himmler, Albrecht Marhold
  • Process for the preparation of polyhalogenated benzotrifluorides, benzotrichlorides and benzoyl chlorides and new trihalogenobenzotrichlorides and -benzoyl chlorides
    Patent number: 6114590
    Abstract: Polyhalogenated 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: April 17, 1997
    Date of Patent: September 5, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Albrecht Marhold, Peter Andres
  • N-cyanoaryl-nitrogen heterocycles
    Patent number: 6110870
    Abstract: The invention relates to new N-cyanoaryl-nitrogen hetero-cycles of the general formula (I) ##STR1## in which R.sup.1, R.sup.2, R.sup.3, R.sup.4 and Z have the meanings given in the description,to a plurality of processes for their preparation, to their use as herbicides and to novel intermediates.
    Type: Grant
    Filed: November 9, 1998
    Date of Patent: August 29, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Roland Andree, Mark-Wilhelm Drewes, Albrecht Marhold, Hans-Joachim Santel, Markus Dollinger
  • Halogen pyrimidines and its use thereof as parasite abatement means
    Patent number: 6103717
    Abstract: Compounds of the formula (I) ##STR1## in which A represents optionally substituted alkanediyl,R represents in each case optionally substituted cycloalkyl, aryl or benzo-fused heterocyclyl,E represents --CH.dbd. or nitrogen,Q represents oxygen, sulphur, --CH.sub.2 --O--, a single bond, or a nitrogen atom which is optionally substituted by alkyl, andX represents halogen.
    Type: Grant
    Filed: July 16, 1998
    Date of Patent: August 15, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ulrich Heinemann, Herbert Gayer, Peter Gerdes, Bernd-Wieland Kruger, Bernd Gallenkamp, Uwe Stelzer, Albrecht Marhold, Ralf Tiemann, Stefan Dutzmann, Gerd Hanssler, Klaus Stenzel
  • Substituted benzimidazoles for pest control
    Patent number: 6103745
    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: January 7, 1999
    Date of Patent: August 15, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Lutz Assmann, Albrecht Marhold, Heinz-Wilhelm Dehne, Stefan Dutzmann, Christoph Erdelen, Klaus Stenzel
  • Benzimidazole derivatives
    Patent number: 6090954
    Abstract: New benzimidazole derivatives of the formula in whichR represents cyano or the group ##STR1## 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: July 14, 1999
    Date of Patent: July 18, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Lutz Assmann, Albrecht Marhold, Heinz-Wilhelm Dehne, Gerd Hanssler, Klaus Stenzel, Ulrike Wachendorff-Neumann
  • Benzimidazole derivatives
    Patent number: 6080776
    Abstract: Novel benzimidazole derivatives of the formula in whichR.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 acid addition salts and metal salt complexes thereof,a process for preparing these compounds and their use as microbicides in crop protection and in the protection of materials.
    Type: Grant
    Filed: January 11, 1999
    Date of Patent: June 27, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Lutz Assmann, Albrecht Marhold, Klaus Stenzel, Martin Kugler
  • Process for the preparation of anilines which contain fluorine and new anilines which contain fluorine
    Patent number: 6077973
    Abstract: Anilines which contain fluorine in a side chain are prepared by reacting chlorinated aromatic compounds with ammonia in the presence of a catalyst and optionally water at 200 to 280.degree. C. Some of the trifluoromethoxyanilines which may be prepared in this way are new compounds.
    Type: Grant
    Filed: November 30, 1992
    Date of Patent: June 20, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventor: Albrecht Marhold
  • 4-cyano-2,5-difluoroaniline preparation process
    Patent number: 6075160
    Abstract: The present invention relates to a process for preparing 4-cyano-2,5-difluoroaniline, which is an intermediate in the preparation of herbicides or liquid crystals.
    Type: Grant
    Filed: February 20, 1998
    Date of Patent: June 13, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Albrecht Marhold, Dietmar Bielefeldt, Bernd Gallenkamp