Patents by Inventor Yves Robin

Yves Robin 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 the preparation of N-carboxyanhydrides
    Patent number: 6479665
    Abstract: The invention relates to a process for the preparation of N-carboxyanhydrides by reaction of the corresponding amino acid with phosgene, diphosgene and/or triphosgene in a solvent medium, characterized in that the reaction is a least partially carried out in the presence of an unsaturated organic compound which has one or more ethylenic double bonds, one of the carbon of at least one ethylenic double bond of which is completely substituted by substituents other than halogen atoms. The N-carboxyanhydrides are thus obtained with better yields and an improved purity.
    Type: Grant
    Filed: October 29, 2001
    Date of Patent: November 12, 2002
    Assignee: Isochem
    Inventors: Fabrice Cornille, Jean-Luc Copier, Jean-Pierre Senet, Yves Robin
  • Process for the preparation of N-carboxyanhydrides
    Publication number: 20020082431
    Abstract: The invention relates to a process for the preparation of N-carboxyanhydrides by reaction of the corresponding amino acid with phosgene, diphosgene and/or triphosgene in a solvent medium, characterized in that the reaction is a least partially carried out in the presence of an unsaturated organic compound which has one or more ethylenic double bonds, one of the carbon of at least one ethylenic double bond of which is completely substituted by substituents other than halogen atoms.
    Type: Application
    Filed: October 29, 2001
    Publication date: June 27, 2002
    Inventors: Fabrice Cornille, Jean-Luc Copier, Jean-Pierre Senet, Yves Robin
  • Process for the synthesis of 1,4-disubstituted pyrazoles
    Patent number: 5191087
    Abstract: The present invention relates to a process for the synthesis of 1,4-disubstituted pyrazoles. A monosubstituted hydrazine is reacted with the product of reaction of an acetal with an N-substituted halomethyliminium salt, preferably N,N-dimethylchloromethyliminium chloride.The 1,4-disubstituted pyrazoles are, in particular, important intermediates in the synthesis of herbicides or drugs.
    Type: Grant
    Filed: July 20, 1992
    Date of Patent: March 2, 1993
    Assignee: Societe Nationale des Poudres et Explosifs
    Inventors: Jean-Marie Alcaraz, Maryse Lecacheur, Yves Robin