Patents by Inventor Sergi Pazenok

Sergi 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 3-dihalomethyl-pyrazole-4-carboxylic acid derivatives
    Patent number: 7939673
    Abstract: The invention relates to a process for preparing 3-dihalomethylpyrazole-4-carboxylic acid derivatives of the formula (I) by reacting ?-fluoroamines of the formula (III) in the presence of Lewis acids with acrylic acid derivatives of the formula (II) to give vinamidinium salts of the formula (IV) and the subsequent reaction thereof with hydrazines, and to the vinamidinium salts of the formula (IV) themselves.
    Type: Grant
    Filed: August 22, 2007
    Date of Patent: May 10, 2011
    Assignee: Bayer CropScience AG
    Inventors: Sergi Pazenok, Lui Norbert, Arnd Neeff
  • PROCESS FOR PREPARING 3-DIHALOMETHYL-PYRAZOLE-4-CARBOXYLIC ACID DERIVATIVES
    Publication number: 20090326242
    Abstract: The invention relates to a process for preparing 3-dihalomethylpyrazole-4-carboxylic acid derivatives of the formula (I) by reacting ?-fluoroamines of the formula (III) in the presence of Lewis acids with acrylic acid derivatives of the formula (II) to give vinamidinium salts of the formula (IV) and the subsequent reaction thereof with hydrazines, and to the vinamidinium salts of the formula (IV) themselves.
    Type: Application
    Filed: August 22, 2007
    Publication date: December 31, 2009
    Applicant: Bayer CropScience AG
    Inventors: Sergi Pazenok, Lui Norbert, Arnd Neeff