Patents by Inventor Isabelle Pelta

Isabelle Pelta 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 4-trifluoromethylsulfinylpyrazole derivative
    Patent number: 6881848
    Abstract: A process for the preparation of a compound of formula (I) comprising oxidizing a compound of formula (II) with trifluoroperacetic acid in the presence of a corrosion inhibiting compound such as boric acid. Also, a process for preparing a compound of formula (II) by adding sulfur dioxide to a mixture of the corresponding disulfide, a formate salt, trifluoromethyl bromide and a polar solvent; and a process for preparing the disulfide comprising adding S2Cl2 to a solution, in an organic solvent, of the corresponding 4-unsubstituted pyrazole.
    Type: Grant
    Filed: July 3, 2003
    Date of Patent: April 19, 2005
    Assignee: BASF Agro B.V. Arnhem (NL), Wädenswil-Branch
    Inventors: Jean-Louis Clavel, Isabelle Pelta, Sylvie Le Bars, Philippe Charreau
  • Chiral (s- or r-methylphenylglycine) amino acid crystal and method for preparing same
    Patent number: 6759551
    Abstract: The invention concerns chiral amino acid, is preparation method, and the use of said chiral amino acid as intermediate for the synthesis of chiral organic compounds.
    Type: Grant
    Filed: September 11, 2002
    Date of Patent: July 6, 2004
    Assignee: Bayer Cropscience S.A.
    Inventors: Isabelle Pelta, Jean-Claude Maret
  • Process for preparing 4-trifluoromethylsulfinylpyrazole derivative
    Publication number: 20040034234
    Abstract: A process for the preparation of a compound of formula (I) 1
    Type: Application
    Filed: July 3, 2003
    Publication date: February 19, 2004
    Inventors: Jean-Louis Clavel, Isabelle Pelta, Sylvie Le Bars, Philippe Charreau
  • Method for preparing chiral amino acids
    Patent number: 6683190
    Abstract: The invention concerns a novel method for preparing chiral amino acids of formula (I) characterised in that it consists in contracting a racemic hydantoin of formula (II) with an enantiomeric splitting agent.
    Type: Grant
    Filed: October 9, 2001
    Date of Patent: January 27, 2004
    Assignee: Bayer Cropscience S.A.
    Inventor: Isabelle Pelta
  • Process for preparing 4-trifluoromethylsulfinylpyrazole derivative
    Patent number: 6620943
    Abstract: A process for the preparation of a compound of formula (I) comprising oxidizing a compound of formula (II) with trifluoroperacetic acid in the presence of a corrosion inhibiting compound such as boric acid. Also, a process for preparing a compound of formula (II) by adding sulfur dioxide to a mixture of the corresponding disulfide, a formate salt, trifluoromethyl bromide and a polar solvent; and a process for preparing the disulfide comprising adding S2Cl2 to a solution, in an organic solvent, of the corresponding 4-unsubstituted pyrazole.
    Type: Grant
    Filed: August 15, 2002
    Date of Patent: September 16, 2003
    Assignee: Bayer Cropscience SA
    Inventors: Jean-Louis Clavel, Isabelle Pelta, Sylvie Le Bars, Philippe Charreau