Patents by Inventor Sergii Pazenok

Sergii Pazenok 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 2-dihaloacyl-3-aminoacrylic acid derivatives
    Patent number: 8258335
    Abstract: The present invention relates to a process for preparing hydrochloride-free 2-dihaloacyl-3-aminoacrylic esters by reacting acid fluorides with dialkylaminoacrylic acid derivatives.
    Type: Grant
    Filed: September 13, 2008
    Date of Patent: September 4, 2012
    Assignee: Bayer Cropscience AG
    Inventors: Sergii Pazenok, Norbert Lui
  • Alkoxy enones and enamino ketones and a process for preparation thereof
    Patent number: 8242313
    Abstract: The present invention relates to novel alkoxy enones and enamino ketones, and to a novel process for preparation thereof. Alkoxy enones and enamino ketones are valuable intermediates for preparation of pyrazoles and anthranilamides, which can be used as insecticides.
    Type: Grant
    Filed: January 21, 2011
    Date of Patent: August 14, 2012
    Assignee: Bayer Cropscience AG
    Inventors: Sergii Pazenok, Norbert Lui, Arnd Neeff
  • Dioxolane and dioxane derivatives and a process for their preparation
    Patent number: 8222435
    Abstract: The present invention relates to novel acylmethylene-1,3-dioxolanes and acylmethylene-1,4-dioxanes of the general formula (I) in which R1, R2, R3 and n have the meanings given in the description, and also a novel process for their preparation. Acylmethylene-1,3-dioxolanes and acylmethylene-1,4-dioxanes are important intermediates for the preparation of pyrazoles and anthranilamides, which can be used as insecticides.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: July 17, 2012
    Assignee: Bayer CropScience AG
    Inventors: Sergii Pazenok, Norbert Lui, Igor Gerus, Olga Balabon
  • Process for preparing fluoroalkyl nitriles
    Patent number: 8203015
    Abstract: The present invention relates to a process for preparing fluoroalkyl nitriles by reacting fluorinated carboxamides with halides and fluorinated carboxylic acids.
    Type: Grant
    Filed: June 7, 2010
    Date of Patent: June 19, 2012
    Assignee: Bayer Cropscience AG
    Inventors: Norbert Lui, Jens-Dietmar Heinrich, Thomas Wollner, Sergii Pazenok
  • PROCESS FOR PREPARING PYRIDYL-SUBSTITUTED PYRAZOLES
    Publication number: 20120136156
    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: April 2, 2010
    Publication date: May 31, 2012
    Applicant: Bayer CropScience AG
    Inventors: Sergii PAZENOK, Norbert LUI, Harry BLASCHKE
  • Process for preparing 2,2-difluoroethylamine
    Patent number: 8188319
    Abstract: The present invention relates to a process for preparing 2,2-difluoroethylamine proceeding from 2,2-difluoro-1-haloethane using ammonia in a solvent which has a maximum water content of 15% by volume and in the presence of a catalyst which accelerates the reaction with ammonia.
    Type: Grant
    Filed: July 27, 2010
    Date of Patent: May 29, 2012
    Assignee: Bayer CropScience AG
    Inventors: Norbert Lui, Sergii Pazenok, Yuriy Grigorievich Shermolovich
  • PROCESS FOR PREPARING TETRAZOLE-SUBSTITUTED ANTHRANILAMIDE DERIVATIVES AND NOVEL CRYSTAL POLYMORPHS OF THESE DERIVATIVES
    Publication number: 20120101133
    Abstract: The present invention relates to a process for preparing tetrazole-substituted anthranilamide derivatives of the formula (I) in which R1, R2, R3, R4, R5 and Z are each as defined in the description, and to a novel crystal polymorph of these derivatives and to the use thereof in agrochemical formulations.
    Type: Application
    Filed: June 14, 2011
    Publication date: April 26, 2012
    Applicant: BAYER CROPSCIENCE AG
    Inventors: Sergii PAZENOK, Norbert Lui, Frank Volz, Britta Olenik, Christian Funke, Rüdiger Fischer, Oliver Gaertzen, Martin-Holger Hinz, Arnd Neeff
  • Novel alkoxy enones and enamino ketones and a process for preparation thereof
    Publication number: 20120022285
    Abstract: The present invention relates to novel alkoxy enones and enamino ketones, and to a novel process for preparation thereof. Alkoxy enones and enamino ketones are valuable intermediates for preparation of pyrazoles and anthranilamides, which can be used as insecticides.
    Type: Application
    Filed: January 21, 2011
    Publication date: January 26, 2012
    Applicant: Bayer CropScience AG
    Inventors: Sergii Pazenok, Norbert Lui, Arnd Neeff
  • Stereoselective one step fluorination process for the preparation of 2-flouropropionate
    Patent number: 8093421
    Abstract: The current invention describes a one-step process for the synthesis of 2-fluoropropionates from lactic acid ester derivatives using TFEDMA.
    Type: Grant
    Filed: October 16, 2007
    Date of Patent: January 10, 2012
    Assignee: Bayer Cropscience AG
    Inventors: Norbert Lui, Sergii Pazenok
  • Process for the preparation of 5-Fluoro-1-alkyl-3-fluoroalkyl-1H-pyrazole-4-carbonyl Chlorides and Fluorides
    Publication number: 20110288305
    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: Application
    Filed: April 22, 2011
    Publication date: November 24, 2011
    Applicant: Bayer CropScience AG
    Inventors: Sergii Pazenok, Nobert Lui, Stephanie Gary
  • Process for Preparing 1-Alkyl-3-difluoromethyl-5-hydroxypyrazoles
    Publication number: 20110288304
    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: Application
    Filed: May 19, 2011
    Publication date: November 24, 2011
    Applicant: Bayer CropScience AG
    Inventors: Sergii PAZENOK, Michael Müller, Norbert Lui
  • Method for producing dihalo acetoacetic alkyl esters
    Patent number: 8044231
    Abstract: The invention relates to a process for preparing alkyl dihaloacetoacetates of the formula (I) by reacting ?,?-dihaloamines of the formula (III) with acetic esters of the formula (II) in the presence of bases.
    Type: Grant
    Filed: January 22, 2008
    Date of Patent: October 25, 2011
    Assignee: Bayer Cropscience AG
    Inventors: Sergii Pazenok, Norbert Lui
  • Preparing 5-fluoro-1-alkyl-3-fluoroalkyl-1H-pyrazole-4-carbonyl chlorides
    Publication number: 20110207940
    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: Application
    Filed: November 19, 2010
    Publication date: August 25, 2011
    Applicant: Bayer CropScience AG
    Inventors: Sergii Pazenok, Norbert Lui, Marc Kosten, Guenter Bartels
  • Process for preparing 2-aminooxyethanol
    Patent number: 7968747
    Abstract: The invention relates to a process for preparing aminoglycol by reacting ketoximes with ethylene oxide under basic conditions to give a substituted 2-hydroxyethyl ketoxime and subsequently reacting the latter with an acid to give aminoglycol.
    Type: Grant
    Filed: November 3, 2007
    Date of Patent: June 28, 2011
    Assignee: Bayer Cropscience AG
    Inventors: Sergii Pazenok, Norbert Lui
  • Novel Dioxolane And Dioxane Derivatives And A Process For Their Preparation
    Publication number: 20110152531
    Abstract: The present invention relates to novel acylmethylene-1,3-dioxolanes and acylmethylene-1,4-dioxanes of the general formula (I) in which R1, R2, R3 and n have the meanings given in the description, and also a novel process for their preparation. Acylmethylene-1,3-dioxolanes and acylmethylene-1,4-dioxanes are important intermediates for the preparation of pyrazoles and anthranilamides, which can be used as insecticides.
    Type: Application
    Filed: December 15, 2010
    Publication date: June 23, 2011
    Applicant: Bayer CropScience AG
    Inventors: Sergii PAZENOK, Norbert LUI, Igor GERUS, Olga BALABON
  • Process For The Preparation Of 1-Alkyl And 1-Aryl-5-pyrazolecarboxylic Acid Derivatives
    Publication number: 20110152532
    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: Application
    Filed: December 15, 2010
    Publication date: June 23, 2011
    Applicant: Bayer CropScience AG
    Inventors: Sergii PAZENOK, Norbert Lui, Igor Gerus
  • Process for Preparing Pyridyl-Substituted Pyrazoles
    Publication number: 20110087029
    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: April 2, 2010
    Publication date: April 14, 2011
    Applicant: Bayer CropScience AG
    Inventors: Sergii Pazenok, Norbert Lui, Harry Blaschke
  • Process for Preparing 2,2-Difluoroethylamine
    Publication number: 20110060167
    Abstract: The present invention relates to a process for preparing 2,2-difluoroethylamine proceeding from 2,2-difluoro-1-haloethane using ammonia in a solvent which has a maximum water content of 15% by volume and in the presence of a catalyst which accelerates the reaction with ammonia.
    Type: Application
    Filed: July 27, 2010
    Publication date: March 10, 2011
    Applicant: Bayer CropScience AG
    Inventors: Norbert LUI, Sergii Pazenok, Yuriy Grigorievich Shermolovich
  • Process for preparing aryl-substituted pyrazoles
    Publication number: 20110028729
    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: July 23, 2010
    Publication date: February 3, 2011
    Applicant: Bayer CropScience AG
    Inventors: Sergii Pazenok, Norbert Lui
  • Process for the Regioselective Preparation of 1-Alkyl-3-haloalkylpyrazole-4-carboxylic Acid Derivatives
    Publication number: 20110028735
    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: Application
    Filed: February 26, 2009
    Publication date: February 3, 2011
    Applicant: Bayer CropScience AG
    Inventors: Sergii Pazenok, Norbert Lui, Arnd Neeff