Patents by Inventor Jean A. Laffitte

Jean A. Laffitte 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).

  • Chiral phosphinite-boranes and their preparation and use
    Patent number: 5434285
    Abstract: The present invention relates, by way of novel industrial products, to the phosphinite-borane compounds of the general formula ##STR1## in which R.sup.1 and R.sup.2, which are identical or different, are each a C.sub.1 -C.sub.18 -alkyl group, a C.sub.5 -C.sub.18 -cycloalkyl group, a C.sub.7 -C.sub.18 -aralkyl group or a C.sub.6 -C.sub.14 -aryl group, it being possible for each of these groups to carry functional groups, and F is a silicon containing bridging group.These products are useful in the syntheses of chiral compounds.
    Type: Grant
    Filed: October 7, 1993
    Date of Patent: July 18, 1995
    Assignee: Societe Nationale Elf Aquitaine
    Inventors: Jean A. Laffitte, Sylvain Juge, Jean P. Genet, Massoud Stephan
  • Process for the hydrogenation of ethylenically unsaturated organic compounds and ruthenium catalysts for carrying out said process
    Patent number: 5426216
    Abstract: The present invention relates to a process for the hydrogenation of ethylenically unsaturated organic compounds. This process is carried out in a homogeneous medium containing a hydrogenation catalyst formed by a complex of ruthenium with a phosphine, which comprises two allylic groups as ligands on the Ru.
    Type: Grant
    Filed: August 12, 1993
    Date of Patent: June 20, 1995
    Assignee: Society Nationale Elf Aquitaine
    Inventors: Jean-Pierre Genet, Sylvain Juge, Jean A. Laffitte, Catherine Pinel, Sergio Mallart