Patents by Inventor Gilbert Peiffer

Gilbert Peiffer 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 phosphorous compounds, a process for their manufacture and their application to the catalysis of enantioselective synthesis reactions
    Patent number: 5210202
    Abstract: Chiral phosphorus-containing ligands comprising at least one amine radical and at least one dihydrocarbylphosphinoxy radical of the formula W=OP (R).sub.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: May 11, 1993
    Assignee: Societe Chimique des Charbonnages S.A.
    Inventors: Michele Petit, Andre Mortreux, Francis Petit, Gerard Buono, Gilbert Peiffer
  • Chiral phosphorus compounds, a process for their manufacture and their application to the catalysis of enantioselective synthesis reactions
    Patent number: 5099077
    Abstract: A method of using a chiral phosphorus-containing ligands comprising at least one amine radical and at least one dihydrocarbylphosphioxy radical of the formula W=OP (R).sub.2 ; from the group consisting of:those of the formula ##STR1## those of the formula ##STR2## those of the formula ##STR3## those of the formula ##STR4## in a hydrogenation reaction for the synthesis of optically active organic compounds comprising reacting at least one organic compound that does not possess a center of asymmetry with (A), on the one hand, at least one transition metal complex of the formula MZq in which M is a metal in group VIII of the Periodic Classification, q is the coordination number of the metal M, and Z is an atom or molecule capable of complexing the metal M and (B), on the other hand, at least one ligand L.
    Type: Grant
    Filed: October 11, 1989
    Date of Patent: March 24, 1992
    Assignee: Societe Chimique des Charbonnages S.A.
    Inventors: Michele Petit, Andre Mortreux, Francis Petit, Gerard Buono, Gilbert Peiffer
  • Process for dimerizing conjugated dienes
    Patent number: 4593140
    Abstract: The process according to the invention consists in dimerizing a conjugated diene in the presence of a catalyst obtained by bringing together (A) at least one nickel complex of formula NiZ.sub.q in which q is the coordination number of the nickel and Z is at least one ligand capable of complexing nickel and (B) at least one phosphorus-containing ligand of general formula ##STR1## in which: R.sub.1 is chosen from a hydrogen atom and hydrocarbon radicals,R.sub.2 and R.sub.3, which may be identical or different, are chosen from a hydrogen atom and hydrocarbon radicals optionally bearing at least one group chosen from alcohol, thiol, thioether, amine, imine, acid, ester, amide and ether groups, andm is greater than or equal to 1.
    Type: Grant
    Filed: May 10, 1985
    Date of Patent: June 3, 1986
    Assignee: Societe Chimique des Charbonnages S.A.
    Inventors: Andre Mortreux, Francis Petit, Philippe Denis, Gerard Buono, Gilbert Peiffer