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 the preparation of 2-halogeno-4,5-difluorobenzoyl fluorides
    Patent number: 5859298
    Abstract: 2-Halogeno-4,5-difluoro-benzoyl fluorides are obtained in high yields by reacting 2,4-dichloro-5-fluoro-benzoyl halides with potassium fluoride in an aprotic solvent. The 2-halogeno-4,5-difluoro-benzoyl fluorides prepared in this way are particularly suitable as intermediates for the preparation of antibacterial active substances.
    Type: Grant
    Filed: February 13, 1997
    Date of Patent: January 12, 1999
    Assignee: Bayer Aktiengesellschaft
    Inventors: Stefan Antons, Albrecht Marhold, Bernhard Beitzke
  • Process for preparing 2-trifluoromethoxy-aniline
    Patent number: 5840983
    Abstract: 2-Trifluoromethoxy-aniline, which can be used as an intermediate for example for preparing pharmaceuticals and agrochemicals, is obtained in very good yields and high purity by nitrating in a first step 1,2-dichlorotrifluoromethoxy-benzene at temperatures between -20.degree. C. and +80.degree. C. and catalytically hydrogenating the resulting nitration products (exclusively 1,2-dichloro-5-nitro-4-trifluoromethoxy-benzene and 1,2-dichloro-3-nitro-4-trifluoromethoxy-benzene) in a 2nd step, it being possible to isolate the aniline intermediates corresponding to the two nitrobenzene derivatives; the nitrobenzene and aniline derivatives mentioned, being novel compounds, are also part of the subject matter of the invention.
    Type: Grant
    Filed: July 18, 1997
    Date of Patent: November 24, 1998
    Assignee: Bayer Aktiengesellschaft
    Inventors: Reinhard Lantzsch, Albrecht Marhold
  • Substituted biphenyl oxazolines
    Patent number: 5807877
    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: March 31, 1997
    Date of Patent: September 15, 1998
    Assignee: Bayer Aktiengesellschaft
    Inventors: Reinhard Lantzsch, Albrecht Marhold, Christoph Erdelen
  • Substituted (1,4) dioxino (2,3-F) benzoimidazole derivatives and their use in pest control
    Patent number: 5792873
    Abstract: Described herein are 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: March 19, 1997
    Date of Patent: August 11, 1998
    Assignee: Bayer Aktiengesellschaft
    Inventors: Lutz Assmann, Albrecht Marhold, Heinz-Wilhelm Dehne, Gerd Hanssler, Klaus Stenzel, Ulrike Wachendorff-Neumann
  • 1,3-dimethyl-5-fluoro-pyrazole-4-carbonyl fluoride
    Patent number: 5750721
    Abstract: A new process for the preparation of a known 1,3-dimethyl-5-fluoro-pyrazole-4-carboxanilide of the formula ##STR1## in which Ar represents optionally substituted phenyl,which process comprisesa) reacting in a first stage, 1,3-dimethyl-5-chloro-pyrazole-4-carbonyl chloride with a fluoride, if appropriate in the presence of a diluent, andb) reacting in a second stage, the 1,3-dimethyl-5-fluoro-pyrazole-4-carbonyl fluoride obtained in this reaction with an aniline of the formulaH.sub.2 N--Arin whichAr has the abovementioned meaning,if appropriate in the presence of an acid acceptor and if appropriate in the presence of a diluent.1,3-Dimethyl-5-fluoro-pyrazole-4-carbonyl fluoride as a new compound.
    Type: Grant
    Filed: April 9, 1997
    Date of Patent: May 12, 1998
    Assignee: Bayer Aktiengesellschaft
    Inventors: Bernd Gallenkamp, Lothar Rohe, Albrecht Marhold
  • Substituted benzimidazoles
    Patent number: 5731300
    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: October 30, 1996
    Date of Patent: March 24, 1998
    Assignee: Bayer Aktiengesellschaft
    Inventors: Lutz Assmann, Albrecht Marhold, Heinz-Wilhelm Dehne, Stefan Dutzmann, Christoph Erdelen, Klaus Stenzel
  • N-cyanoaryl-nitrogen heterocycles
    Patent number: 5681794
    Abstract: The invention relates to new N-cyanoaryl-nitrogen heterocycles 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: September 30, 1994
    Date of Patent: October 28, 1997
    Assignee: Bayer Aktiengesellschaft
    Inventors: Roland Andree, Mark-Wilhelm Drewes, Albrecht Marhold, Hans-Joachim Santel, Markus Dollinger
  • Process for the preparation of 1,3-dimethyl-5-fluoro-pyrazole-4-carboxanilides
    Patent number: 5675016
    Abstract: A new process for the preparation of a known 1,3-dimethyl-5-fluoro-pyrazole-4-carboxanilide of the formula ##STR1## in which Ar represents optionally substituted phenyl,which process comprisesa) reacting in a first stage, 1,3-dimethyl-5-chloro-pyrazole-4-carbonyl chloride with a fluoride, if appropriate in the presence of a diluent, andb) reacting in a second stage, the 1,3-dimethyl-5-fluoro-pyrazole-4-carbonyl fluoride obtained in this reaction with an aniline of the formulaH.sub.2 N--Arin whichAr has the abovementioned meaning,if appropriate in the presence of an acid acceptor and if appropriate in the presence of a diluent.1,3-Dimethyl-5-fluoro-pyrazole-4-carbonyl fluoride as a new compound.
    Type: Grant
    Filed: November 25, 1996
    Date of Patent: October 7, 1997
    Assignee: Bayer Aktiengesellschaft
    Inventors: Bernd Gallenkamp, Lothar Rohe, Albrecht Marhold
  • Process for the preparation of aromatic fluorinated compounds and novel diamides
    Patent number: 5672765
    Abstract: Aromatic, ring-fluorinated compounds are prepared by reaction of corresponding chlorine compounds or bromine compounds with alkali metal fluorides using a diamide as solvent. Most of the diamides which can be used are novel compounds.
    Type: Grant
    Filed: July 14, 1995
    Date of Patent: September 30, 1997
    Assignee: Bayer Aktiengesellschaft
    Inventors: Albrecht Marhold, Marianne Lohr, Heinrich Wamhoff
  • Process for preparing 1,1,1,4,4,4-hexafluorobutane in the liquid phase
    Patent number: 5672787
    Abstract: 1,1,1,4,4,4-Hexafluorobutane (R 356) can be obtained in a simple manner and in excellent yields and with excellent selectivities when 1,1,1,4,4,4-hexafluorobutene is reacted in the liquid phase with hydrogen in the presence of a noble metal catalyst.
    Type: Grant
    Filed: June 17, 1996
    Date of Patent: September 30, 1997
    Assignee: Bayer Aktiengesellschaft
    Inventors: Dietmar Bielefeldt, Norbert Lui, Albrecht Marhold
  • Process for the preparation of fluorine-substituted aminobenzodioxoles and -benzodioxanes and new intermediates
    Patent number: 5670665
    Abstract: According to the invention, a new process for the preparation of fluorine-substituted aminobenzodioxoles and -benzodioxanes of the formula (I) ##STR1## in which n represents an integer 1 or 2, has been found, in which fluorine-substituted nitro-halogeno-benzodioxoles and -benzodioxanes, which are likewise new, are hydrogenated. The novel intermediates are obtained from fluorine-substituted benzodioxoles and benzodioxanes by halogenation and subsequent nitration. The amino compounds are important starting materials for highly active biocides.
    Type: Grant
    Filed: June 17, 1996
    Date of Patent: September 23, 1997
    Assignee: Bayer Aktiengesellschaft
    Inventors: Peter Andres, Albrecht Marhold
  • Substituted benzimidazoles
    Patent number: 5656649
    Abstract: The invention relates to new substituted benzimidazoles 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, alkylcarbonyloxy, 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: May 25, 1995
    Date of Patent: August 12, 1997
    Assignee: Bayer Aktiengesellschaft
    Inventors: Winfried Lunkenheimer, Bernd Baasner, Folker Lieb, Stefan Bohm, Albrecht Marhold, Ulrich Gorgens, Wilhelm Stendel, Heinz-Wilhelm Dehne, Hans-Joachim Santel
  • Methyleneperfluorocycloalkanes and their use in the production of thermoplastic fluororesins
    Patent number: 5648566
    Abstract: Monomers of the formula (I) (for example, 3,3,4,4,5,5,6,6-octafluoromethylenecyclopentane) are described, as well as copolymers prepared from them and from one or more monomers copolymerizable with them. ##STR1## wherein n=3 to 5 The compounds are suitable for the production of a multiplicity of thermoplastically processable copolymers having various sets of properties which permit applications both as compact moulded parts and as coatings.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: July 15, 1997
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ralf Kruger, Michael Negele, Norbert Lui, Albrecht Marhold
  • Fluoro-trifluoromethylbenzoic acid derivatives
    Patent number: 5648567
    Abstract: The new fluoro-trifluoromethylbenzoic acid derivatives of the general formula (I) ##STR1## wherein the substituents R, R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 have the meaning given in the description, are suitable as starting substances for the preparation of antibacterial agents and feed additives.
    Type: Grant
    Filed: August 14, 1995
    Date of Patent: July 15, 1997
    Assignee: Bayer Aktiengesellschaft
    Inventors: Albrecht Marhold, Peter Andres
  • Substituted (1,4) Dioxino (2,3-F) Benzoimidazole derivative and their use in pest control
    Patent number: 5648316
    Abstract: Described herein are 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.
    Type: Grant
    Filed: October 29, 1996
    Date of Patent: July 15, 1997
    Assignee: Bayer Aktiengesellschaft
    Inventors: Lutz Assmann, Albrecht Marhold, Heinz-Wilhelm Dehne, Gerd Hanssler, Klaus Stenzel, Ulrike Wachendorff-Neumann
  • Cyclopropylamine derivatives
    Patent number: 5646329
    Abstract: 2-fluoro-cyclopropylamine is prepared in an advantageous manner by reacting an N-vinyl compound with a carbene of type FXC: (where X=chlorine or bromine) to give the corresponding cyclopropylamine derivative, replacing the radical X in this derivative by hydrogen, by reduction, and finally eliminating the other substituents on the hydrogen atom.
    Type: Grant
    Filed: November 2, 1995
    Date of Patent: July 8, 1997
    Assignee: Bayer Aktiengesellschaft
    Inventors: Norbert Lui, Albrecht Marhold, Stefan Bohm
  • C.sub.3 to C.sub.5 polyfluorcalkanes propellants
    Patent number: 5646196
    Abstract: Polyfluoroalkanes are used as propellants in sprayable compositions or in the the preparation of plastic foams and in the electrical industry as cleansing and degreasing agents.
    Type: Grant
    Filed: January 26, 1996
    Date of Patent: July 8, 1997
    Assignee: Bayer Aktiengesellschaft
    Inventors: Claus-Dieter Sommerfeld, Wilhelm Lamberts, Dietmar Bielefeldt, Albrecht Marhold, Michael Negele
  • Process for the preparation of 2,2-difluorobenzo[1.3]dioxolecarbaldehydes
    Patent number: 5637737
    Abstract: 2,2-Difluorobenzo[1.3]dioxole-carbaldehydes are prepared in a particularly advantageous manner if methylbenzo[1.3]dioxoles are chlorinated, the resulting dichloromethyl-2,2-dichlorobenzo[1.3]dioxole is fluorinated with hydrogen fluoride and the dichloromethyl-2,2-difluorobenzo[1.3]dioxole obtained by this procedure is reacted with a carboxylic acid.
    Type: Grant
    Filed: August 14, 1996
    Date of Patent: June 10, 1997
    Assignee: Bayer Aktiengesellschaft
    Inventors: Peter Andres, Albrecht Marhold
  • C.sub.3 to C.sub.5 polyfluorcalkanes propellants
    Patent number: 5624970
    Abstract: Polyfluoroalkanes are used as propellants in sprayable compositions or in the preparation of plastic foams and in the electrical industry as cleansing and degreasing agents.
    Type: Grant
    Filed: January 26, 1996
    Date of Patent: April 29, 1997
    Assignee: Bayer Aktiengesellschaft
    Inventors: Claus-Dieter Sommerfeld, Wilhelm Lamberts, Dietmar Bielefeldt, Albrecht Marhold, Michael Negele
  • Process for the preparation of side chain-fluorinated alkyloxazoles, and new side chain-fluorinated alkyloxazoles
    Patent number: 5621111
    Abstract: A process for the preparation of side chain-fluorinated alkyloxazoles, wherein hydroxyalkyloxazoles are reacted with an .alpha.,.alpha.-difluoroalkylamine at pressures of under 2 bar, in the presence of an inert solvent boiling at above 100.degree. C. (at normal pressure), and new fluorinated alkyloxazoles.
    Type: Grant
    Filed: October 17, 1995
    Date of Patent: April 15, 1997
    Assignee: Bayer Aktiengesellschaft
    Inventors: Norbert Lui, Albrecht Marhold