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).

  • Preparing 5-fluoro-1-alkyl-3-fluoroalkyl-1H-pyrazole-4-carbonyl chlorides
    Patent number: 8436191
    Abstract: The present invention relates to a novel process for preparing 5-fluoro-1-alkyl-3-fluoroalkyl-1H-pyrazole-4-carbonyl chlorides, a useful intermediate in the manufacture of fungicides.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: May 7, 2013
    Assignee: Bayer CropScience AG
    Inventors: Sergii Pazenok, Norbert Lui, Marc Kosten, Guenter Bartels
  • Tetraarylborate process for the preparation of substituted biphenyls
    Patent number: 8436211
    Abstract: The present invention relates to a process for the preparation of substituted biphenyls by reacting aryl halides with tetraarylborates in the presence of palladium catalysts.
    Type: Grant
    Filed: August 30, 2010
    Date of Patent: May 7, 2013
    Assignee: Bayer CropScience AG
    Inventors: Wahed Ahmed Moradi, Norbert Lui, Michael Dockner, Thomas Jagusch
  • Process for the preparation of 5-fluoro-1-alkyl-3-fluoroalky1-1H-pyrazole-4-carbonyl chlorides and fluorides
    Patent number: 8431718
    Abstract: The present invention relates to a novel process for the preparation of 5-fluoro-1-alkyl-3-fluoroalkyl-1H-pyrazole-4-carbonyl halides and the intermediates occurring in this process, ethyl 5-chloro-1-methyl-3-difluoromethyl-1H-pyrazole-4-carboxylate and ethyl 5-fluoro-1-methyl-3-difluoromethyl-1H-pyrazole-4-carboxylate.
    Type: Grant
    Filed: April 22, 2011
    Date of Patent: April 30, 2013
    Assignee: Bayer CropScience AG
    Inventors: Sergii Pazenok, Norbert Lui, Stephanie Gary
  • PROCESS FOR THE PREPARATION OF 5-SUBSTITUTED 1-ALKYLTETRAZOLYL OXIME DERIVATIVES
    Publication number: 20130102786
    Abstract: The present invention relates to a process for the preparation of 5-substituted 1-alkyltetrazolyl oxime derivatives.
    Type: Application
    Filed: June 27, 2011
    Publication date: April 25, 2013
    Inventors: Christian Beier, David Bernier, Pierre-Yves Coqueron, Phillipe Desbordes, Christophe Dubost, Norbert Lui, Sergii Pazenok
  • PROCESS FOR THE PREPARATION OF 5-SUBSTITUTED 1-ALKYLTETRAZOLYL OXIME DERIVATIVES
    Publication number: 20130096311
    Abstract: The present invention relates to a process for the preparation of 5-substituted 1-alkyltetrazolyl oxime derivatives.
    Type: Application
    Filed: June 21, 2011
    Publication date: April 18, 2013
    Inventors: Christian Beier, David Bernier, Pierre-Yves Coqueron, Philippe Desbordes, Christophe Dubost, Norbert Lui, Sergii Pazenok
  • Aryl-substituted pyrazoles
    Patent number: 8399679
    Abstract: The present invention relates to a process for preparing 1-aryl-substituted pyrazoles, comprising the reaction of alkoxy enones and enamino ketones with arylhydrazine derivatives to give 1-aryl-substituted dihydro-1H-pyrazoles, the further reaction thereof with elimination of water to give 1-aryl-substituted trihalomethylpyrazoles, and the further processing thereof.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: March 19, 2013
    Assignee: Bayer CropScience AG
    Inventors: Sergii Pazenok, Norbert Lui
  • Process for preparing pyridyl-substituted pyrazoles
    Patent number: 8362261
    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: Grant
    Filed: April 2, 2010
    Date of Patent: January 29, 2013
    Assignee: Bayer Cropscience AG
    Inventors: Sergii Pazenok, Norbert Lui, Harry Blaschke
  • Aryl-substituted Pyrazoles
    Publication number: 20130018192
    Abstract: The present invention relates to a process for preparing 1-aryl-substituted pyrazoles, comprising the reaction of alkoxy enones and enamino ketones with arylhydrazine derivatives to give 1-aryl-substituted dihydro-1H-pyrazoles, the further reaction thereof with elimination of water to give 1-aryl-substituted trihalomethylpyrazoles, and the further processing thereof.
    Type: Application
    Filed: September 14, 2012
    Publication date: January 17, 2013
    Applicant: Bayer Intellectual Property GmbH
    Inventors: Sergii Pazenok PAZENOK, Norbert Lui
  • Process for the regioselective preparation of 1-alkyl-3-haloalkylpyrazole-4-carboxylic acid derivatives
    Patent number: 8350053
    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 with hydrazines in the presence of carbonyl compounds.
    Type: Grant
    Filed: February 26, 2009
    Date of Patent: January 8, 2013
    Assignee: Bayer CropScience AG
    Inventors: Sergii Pazenok, Norbert Lui, Arnd Neeff
  • Process for the preparation of 4-aminobut-2-enolides starting from 4-alkoxyfuran-2(5H)-one or 4-arylalkoxyfuran-2(5H)-one
    Patent number: 8344151
    Abstract: Process for the preparation of 4-aminobut-2-enolide compounds of the formula (I): comprising reaction of a 4-alkoxyfuran-2(5H)-one compound or 4-arylalkoxyfuran-2(5H)-one compound of the formula (II) with an amine of the formula (III) in which R1, R2 and A have the definitions given in the description, in the presence of a Brønstedt acid.
    Type: Grant
    Filed: December 21, 2010
    Date of Patent: January 1, 2013
    Assignee: Bayer Cropscience AG
    Inventors: Norbert Lui, Jens-Dietmer Heinrich
  • METHOD FOR PREPARING 4-AMINOBUT-2-ENOLIDES
    Publication number: 20120323023
    Abstract: Process for preparing 2,2-difluoroethylamine derivatives, wherein compounds of the general formula (IV) are reduced to the corresponding 2,2-difluoroethylamine derivatives of the general formula (III), where the A radical is as defined in the description:
    Type: Application
    Filed: August 22, 2012
    Publication date: December 20, 2012
    Applicant: 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: 8324392
    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 22, 2010
    Date of Patent: December 4, 2012
    Assignee: Bayer Cropscience AG
    Inventors: Britta Olenik, Robert Velten, Peter Jeschke, Norbert Lui, Christian Funke, Wolfgang Wirth
  • Method for producing 2,2-difluoroethylamine derivatives by imine hydrogenation
    Patent number: 8324393
    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 radical is as defined in the description:
    Type: Grant
    Filed: September 5, 2008
    Date of Patent: December 4, 2012
    Assignee: Bayer Cropscience AG
    Inventors: Norbert Lui, Jens-Dietmar Heinrich
  • Process for preparing 2,4-dihydroxyphenyl 4-methoxybenzyl ketones
    Patent number: 8324431
    Abstract: The invention relates to a process for preparing 2,4-dihydroxyphenyl 4-methoxybenzyl ketones of the formula (I) by Friedel-Crafts acylation in hydrogen fluoride (HF). 2,4-Dihydroxyphenyl 4-methoxybenzyl ketones of the formula (I) in which R1 and R2 are each hydrogen, chlorine, fluorine, bromine, iodine, CF3, methyl, optionally substituted alkoxy, —OCF3, —C(CH3)3, —CH2(CH3)2, —CH(CH3)2, R3 is hydrogen, Cl, F, Br, optionally substituted alkyl, optionally substituted alkoxy, —C(CH3)3, and X is hydroxyl, F, Cl, Br, optionally substituted alkoxy, are obtained in high yield and high purity by reacting phenylacetic acid derivatives of the formula (II) with phenols of the formula (III) in liquid hydrogen fluoride (HF).
    Type: Grant
    Filed: February 16, 2008
    Date of Patent: December 4, 2012
    Assignee: Plant Health Care, Inc.
    Inventors: Sergii Pazenok, Norbert Lui
  • Process for preparing 2,4-dioxotetrahydrofuran-3-carboxylates
    Patent number: 8318955
    Abstract: Process for preparing 2,4-dioxotetrahydrofuran-3-carboxylates of the formula (I) and/or (I?) comprising the reaction of a haloacetyl chloride compound of the formula (II) with a malonic ester of the formula (III) in which Hal, R1 and R2 have the definitions stated in the application, in the presence of a suitable base and optionally in the presence of a solvent; the addition of a sufficient amount of water to the reaction mixture; and the isolation of the desired 2,4-dioxotetrahydrofuran-3-carboxylate.
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: November 27, 2012
    Assignee: Bayer Cropscience AG
    Inventors: Norbert Lui, Jens-Dietmar Heinrich, Christian Funke
  • Process for preparing chiral 3-triazolyl sulphoxide derivatives
    Patent number: 8314133
    Abstract: The present invention relates to a catalytic process for preparing 3-triazolyl sulphoxide derivatives in enantiomerically pure or enantiomerically enriched form.
    Type: Grant
    Filed: July 16, 2010
    Date of Patent: November 20, 2012
    Assignee: Bayer Cropscience AG
    Inventors: Stefan Antons, Norbert Lui, Wahed Ahmed Moradi
  • Process for the preparation of 4-aminobut-2-enolides
    Patent number: 8314242
    Abstract: Process for the preparation of 4-aminobut-2-enolide compounds of the formula (I): comprising reaction of a 4-(methylamino)furan-2(5H)-one compound of the formula (II) with an amine of the formula (III) in which R1 and A have the definitions mentioned in the description, optionally in the presence of a Brønstedt acid.
    Type: Grant
    Filed: August 17, 2010
    Date of Patent: November 20, 2012
    Assignee: BayerCrop Science AG
    Inventors: Norbert Lui, Jens-Dietmar Heinrich
  • Process for preparing aryl-substituted pyrazoles
    Patent number: 8299260
    Abstract: The present invention relates to a process for preparing 1-aryl-substituted pyrazoles, comprising the reaction of alkoxy enones and enamino ketones with arylhydrazine derivatives to give 1-aryl-substituted dihydro-1H-pyrazoles, the further reaction thereof with elimination of water to give 1-aryl-substituted trihalomethylpyrazoles, and the further processing thereof.
    Type: Grant
    Filed: July 23, 2010
    Date of Patent: October 30, 2012
    Assignee: Bayer CropScience AG
    Inventors: Sergii Pazenok, Norbert Lui
  • Method for the production of 2-fluoroacyl-3-aminoacrylic acid derivatives
    Patent number: 8288582
    Abstract: The present invention relates to a process for preparing 2-fluoroacyl-3-aminoacrylic acid derivatives by reacting fluorinated carboxylic acids with dialkylaminoacrylic acid derivatives and acid halides.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: October 16, 2012
    Assignee: Bayer CropScience AG
    Inventors: Norbert Lui, Thomas Wollner, Jürgen Wieschmeyer, Michael Dockner, Jens-Dietmar Heinrich
  • Method for preparing 4-aminobut-2-enolides
    Patent number: 8273904
    Abstract: Process for preparing 2,2-difluoroethylamine derivatives, wherein compounds of the general formula (IV) are reduced to the corresponding 2,2-difluoroethylamine derivatives of the general formula (III), where the A radical is as defined in the description:
    Type: Grant
    Filed: September 5, 2008
    Date of Patent: September 25, 2012
    Assignee: Bayer Cropscience AG
    Inventors: Norbert Lui, Jens-Dietmar Heinrich