Patents by Inventor Norbert Lui

Norbert Lui 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 PRODUCING 2-CHLOROALLYL THIOCYANATE AND 2-CHLOROALLYL ISOTHIOCYANATE
    Publication number: 20140107367
    Abstract: A process is described for producing 2-chloroallyl isothiocyanate from 2,3-dichloro-1-propene by reacting the 2,3-dichloro-1-propene with a thiocyanate in the presence of a phase transfer catalyst, without diluent or in the presence of up to 15 percent by weight based on 2,3-dichloropropene and simultaneously in the presence of an excess of from 10 to 200 mol percent of 2,3-dichloro-1-propene based on the thiocyanate. A process starting from 1,2,3-trichloropropane is also described.
    Type: Application
    Filed: April 24, 2012
    Publication date: April 17, 2014
    Applicant: BAYER INTELLECTUAL PROPERTY GMBH
    Inventors: Thomas Himmler, Matthias Decker, Ralf Dunkel, Peter Gerdes, Martin Littmann, Norbert Lui, Albert Schnatterer
  • Method for producing enaminocarbonyl compounds
    Patent number: 8680285
    Abstract: The present invention relates to a process for the preparation of enaminocarbonyl compounds of the formula (I) where compounds of the formula (II) are reacted in the presence of a Brønsted acid to give compounds of the formula (I), and A, R1 and Z are as defined in the description, and also corresponding starting compounds which are used in the process according to the invention.
    Type: Grant
    Filed: March 12, 2010
    Date of Patent: March 25, 2014
    Assignee: Bayer Cropscience AG
    Inventors: Norbert Lui, Jens-Dietmar Heinrich
  • Method for producing enaminocarbonyl compounds
    Patent number: 8680286
    Abstract: The present invention relates to a process for preparing enaminocarbonyl compounds by reacting compounds of the formula (II) with compounds of the formula (III) in which the A, R1, R2 and Z radicals are each as defined in the description, in the presence of a Brønsted acid.
    Type: Grant
    Filed: March 12, 2010
    Date of Patent: March 25, 2014
    Assignee: Bayer Cropscience AG
    Inventors: Norbert Lui, Jens-Dietmar Heinrich
  • Process for the preparation of 5-substituted 1-alkyltetrazolyl oxime derivatives
    Patent number: 8680283
    Abstract: The present invention relates to a process for the preparation of 5-substituted 1-alkyltetrazolyl oxime derivatives.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: March 25, 2014
    Assignee: Bayer Intellectual Property GmbH
    Inventors: Christian Beier, David Bernier, Pierre-Yves Coqueron, Philippe Desbordes, Christophe Dubost, Norbert Lui, Sergii Pazenok
  • Method for producing 2,2-difluoroethylamine derivatives by imine hydrogenation
    Patent number: 8637673
    Abstract: Process for preparing 2,2-difluoroethylamine derivatives, wherein compounds of the general formula (IV) are hydrogenated to the corresponding 2,2-difluoroethylamine derivatives of the general formula (III), where the A, R1 and R2 radicals are each as defined in the description:
    Type: Grant
    Filed: March 8, 2010
    Date of Patent: January 28, 2014
    Assignee: Bayer Cropscience AG
    Inventors: Norbert Lui, Stefan Antons
  • 3-[1-(3-haloalkyl)triazolyl]phenyl sulphide derivatives as acaricides and insecticides
    Patent number: 8632767
    Abstract: The present invention constitutes new 3-[1-(3-haloalkyl)triazolyl]phenyl sulphide derivatives of the formula (I) in which A1, A2, B0, B1, B2, B3, R1, R2 and n are as defined in the description, to their use as acaricides and insecticides for controlling animal pests, and to processes for preparing them.
    Type: Grant
    Filed: August 19, 2010
    Date of Patent: January 21, 2014
    Assignee: Bayer Intellectual Property GmbH
    Inventors: Bernd Alig, Stefan Antons, Reiner Fischer, Norbert Lui, Adeline Köhler, Arnd Voerste
  • Method for the regioselective synthesis of 1-alky1-3-haloalkyl-pyrazole-4-carboxylic acid derivatives
    Patent number: 8629288
    Abstract: The present invention relates to a process for the regioselective synthesis of 1-alkyl-3-halo-alkylpyrazole-4-carboxylic acid derivatives by cyclization of 2,3-disubstituted acrylic acid derivatives, and to the hydrazones formed as intermediates in the process.
    Type: Grant
    Filed: February 12, 2009
    Date of Patent: January 14, 2014
    Assignee: Bayer Intellectual Property GmbH
    Inventors: Sergii Pazenok, Norbert Lui, Jens-Dietmar Heinrich, Thomas Wollner
  • Process for preparing dithiine-tetracarboxy-diimides
    Patent number: 8609868
    Abstract: The present invention relates to a new process for preparing dithiine-tetracarboxy-diimides.
    Type: Grant
    Filed: May 5, 2011
    Date of Patent: December 17, 2013
    Assignee: Bayer CropScience AG
    Inventors: Norbert Lui, Jens-Dietmar Heinrich, Thomas Himmler, Frank Volz
  • Method for the regioselective synthesis of 1-Alkyl-3-haloalkyl-pyrazole-4-carboxylic acid derivatives
    Patent number: 8592605
    Abstract: The present invention relates to a process for the regioselective synthesis of 1-alkyl-3-halo-alkylpyrazole-4-carboxylic acid derivatives by cyclization of 2,3-disubstituted acrylic acid derivatives, and to the hydrazones formed as intermediates in the process.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: November 26, 2013
    Assignee: Bayer Intellectual Property GmbH
    Inventors: Sergii Pazenok, Norbert Lui, Jens-Dietmar Heinrich, Thomas Wollner
  • Process for the preparation of 1-alkyl and 1-aryl-5-pyrazolecarboxylic acid derivatives
    Patent number: 8586753
    Abstract: The present invention relates to a process for the preparation of 1-alkyl- or 1-aryl-substituted 5-pyrazolecarboxylic acid derivatives comprising the reaction of substituted 1,3-dioxolanes and 1,4-dioxanes with alkyl- or arylhydrazines to give 1-alkyl- or 1-aryl-substituted dihydro-1H-pyrazoles, and their further reaction to give 1-alkyl- or 1-aryl-substituted 5-pyrazolecarboxylic acid derivatives, which can be used as valuable intermediates for producing insecticidally effective anthranilamides.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: November 19, 2013
    Assignee: Bayer CropScience AG
    Inventors: Sergii Pazenok, Norbert Lui, Igor Gerus
  • Process for the preparation of 2,2-difluoroethylamine derivatives starting from N-(2,2-difluoroethyl)prop-2-en-1-amine
    Patent number: 8586756
    Abstract: Process for the preparation of 2,2-difluoroethylamine derivatives of the formula (IV) comprising the steps (i) and (ii): step (i): reaction of N-(2,2-difluoroethyl)prop-2-en-1-amine of the formula (I) with a compound of the formula (II) A-CH2-E??(II) to give a compound of the formula (III) optionally in the presence of an inorganic or organic base, and step (ii): removal of the allyl group from the compound of the formula (III), in which, in the formulae (II), (III) and (IV), A and E have the meanings given in the description.
    Type: Grant
    Filed: November 9, 2011
    Date of Patent: November 19, 2013
    Assignee: Bayer Cropscience AG
    Inventors: Norbert Lui, Jens-Dietmar Heinrich
  • Process for the preparation of 2,2-difluoroethylamine
    Patent number: 8580973
    Abstract: A process for the preparation of 2,2-difluoroethylamine, comprising the reaction of 2,2-difluoro-1-chloroethane with an imide of the formula (II) in the presence of an acid scavenger, to give a compound of the formula (III) in which, in the compounds of the formulae (II) and (III), R1 and R2 are, each independently of one another, hydrogen or C1-C6-alkyl or R1 and R2 form, together with the carbon atoms to which they are bonded, a six-membered aromatic ring which is optionally substituted; and the cleavage of 2,2-difluoroethylamine by reaction of the compound of the formula (III) with acid, base or hydrazine.
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: November 12, 2013
    Assignee: Bayer Cropscience AG
    Inventors: Norbert Lui, Jens-Dietmar Heinrich
  • PROCESS FOR THE PREPARATION OF SUBSTITUTED N-(BENZYL)CYCLOPROPANAMINES BY IMINE HYDROGENATION
    Publication number: 20130217910
    Abstract: The present invention relates to a process for the preparation of substituted N-(benzyl)cyclopropanamines of the general formula (II) starting from N-[(aryl)methylene]cyclopropanamine derivatives. The present invention further provides the N-[(arypmethylene]cyclopropanamine derivatives used as starting compounds in this process according to the invention, and their use for the preparation of substituted N (benzyl)cyclopropanamines.
    Type: Application
    Filed: November 4, 2011
    Publication date: August 22, 2013
    Inventors: Norbert Lui, Wahed Ahmed Moradi, Thomas Norbert Muller
  • Method for producing 4-aminobut-2-enolides
    Patent number: 8487112
    Abstract: The present invention relates to a process for preparing 4-aminobut-2-enolides and also corresponding intermediates and starting compounds which are passed through or used in the process according to the invention.
    Type: Grant
    Filed: September 5, 2008
    Date of Patent: July 16, 2013
    Assignee: Bayer Cropscience AG
    Inventors: Norbert Lui, Jens-Dietmar Heinrich
  • Solid form of 4-[[(6-chloropyridin-3-yl)methyl](2,2-difluoroethyl)amino]furan-2(5H)-one
    Patent number: 8476448
    Abstract: The present invention relates to a novel solid form of 4-[[(6-chloropyridin-3-yl)methyl](2,2-difluoroethyl)amino]furan-2(5H)-one, to processes for its preparation and to its use in agrochemical preparations.
    Type: Grant
    Filed: October 31, 2012
    Date of Patent: July 2, 2013
    Assignee: Bayer Cropscience AG
    Inventors: Britta Olenik, Robert Velten, Peter Jeschke, Norbert Lui, Christian Funke, Wolfgang Wirth
  • Process for preparing 2,2-difluoroethylamine derivatives by alkylation with 2,2-difluoroethyl-1-haloethanes
    Patent number: 8466293
    Abstract: Process for preparing 2,2-difluorethylamine derivatives of the general formula (III) in which A is an optionally substituted heterocycle as described in the description, by reacting a 2,2-difluoroethyl-1-haloethane compound of the general formula (I) in which Hal is Cl, Br or iodine, with an amine of the general formula (II) in which A is as defined above, optionally in the presence of a base.
    Type: Grant
    Filed: June 13, 2011
    Date of Patent: June 18, 2013
    Assignee: Bayer CropScience AG
    Inventors: Norbert Lui, Jens-Dietmar Heinrich, Wahed Ahmed Moradi, Christian Funke
  • Process for preparing substituted biphenylanilides
    Patent number: 8455689
    Abstract: The present invention relates to a process for preparing substituted biphenylanilides of the formula I wherein R1 is a protected amino group which comprises reacting a compound of formula II in the presence of a base and of a palladium catalyst in a solvent, with an organoboron compound of formula (III)
    Type: Grant
    Filed: April 24, 2009
    Date of Patent: June 4, 2013
    Assignee: Bayer CropScience AG
    Inventors: Michael Dockner, Heiko Rieck, Wahed Ahmed Moradi, Norbert Lui
  • Process for preparing 1-alkyl-3-difluoromethyl-5-hydroxypyrazoles
    Patent number: 8455664
    Abstract: The present invention relates to a process for preparing 1-alkyl-3-difluoromethyl-5-hydroxypyrazoles, which are valuable intermediates for the production of fungicides.
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: June 4, 2013
    Assignee: Bayer CropScience AG
    Inventors: Sergii Pazenok, Michael Müller, Norbert Lui
  • Process for the preparation of 2,2-difluoroethylamine starting from a benzylamine compound
    Patent number: 8450528
    Abstract: Process for the preparation of 2,2-difluoroethylamine of the formula (I) CHF2CH2NH2??(I) comprising the stages (i) and (ii): stage (i): reaction of 2,2-difluoro-1-haloethane of the general formula (II) CHF2—CH2Hal??(II), with a benzylamine compound of the formula (III) in the presence of an acid scavenger, in which, in formula (II), Hal is chlorine, bromine or iodine, and, in the formulae (III), R1 is hydrogen or C1-C12-alkyl, and R2 is hydrogen, halogen, C1-C12-alkyl or C1-C6-alkoxy; stage (ii): catalytic hydrogenation of the N-benzyl-2,2-difluoroethanamine compound obtained in the stage (i) to give 2,2-difluoroethylamine of the formula (I) or a salt thereof.
    Type: Grant
    Filed: November 9, 2011
    Date of Patent: May 28, 2013
    Assignee: Bayer Cropscience AG
    Inventors: Norbert Lui, Jens-Dietmar Heinrich, Christian Funke, Günter Schlegel, Thomas Norbert Müller
  • Process for Preparing Pyridyl-Substituted Pyrazoles
    Publication number: 20130131347
    Abstract: The present invention relates to a process for preparing 1-pyridyl-substituted pyrazoles, comprising the reaction of acetyleneketones with pyridylhydrazine derivatives to give 1-pyridyl-substituted dihydro-1H-pyrazoles, the further reaction thereof with elimination of water to give 1-pyridyl-substituted trihalomethylpyrazoles, and the further processing thereof.
    Type: Application
    Filed: January 11, 2013
    Publication date: May 23, 2013
    Applicant: Bayer Intellectual Property GmbH
    Inventors: Sergii PAZENOK, Norbert LUI, Harry BLASCHKE