Patents by Inventor Birgit Driessen-Holscher

Birgit Driessen-Holscher 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).

  • Publication number: 20030119664
    Abstract: The present invention relates to catalysts comprising chiral monophosphorus compounds and their use, the chiral monophosphorus compounds themselves and also their precursors.
    Type: Application
    Filed: September 27, 2002
    Publication date: June 26, 2003
    Inventors: Claus Dreisbach, Benjamin Meseguer, Thomas Prinz, Ulrich Scholz, Hans-Christian Militzer, Friederike Agel, Birgit Driessen-Holscher
  • Patent number: 6566298
    Abstract: The invention relates to the preparation and use as catalysts of diphosphines of the formula (I) in which R is C6-C14-aryl or C4-C13-heteroaryl containing 1 to 3 heteroatoms selected from the group consisting of nitrogen, oxygen, and sulfur, wherein the aryl and heteroaryl radicals may optionally be substituted by halogen, C1-C6-alkyl, C1-C6-alkoxy, and/or trimethylsilyl, and R1 to R4, independently of one another, are each hydrogen, C1-C10-alkyl, C1-C10-alkoxy, F, Cl, or Br.
    Type: Grant
    Filed: August 15, 2002
    Date of Patent: May 20, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Birgit Driessen-Hölscher, Joachim Kralik, Inga Ritzkopf, Christian Steffens, Guido Giffels, Claus Dreisbach, Thomas Prinz, Walter Lange
  • Publication number: 20030045713
    Abstract: The invention relates to the preparation and use as catalysts of diphosphines of the formula (I) 1
    Type: Application
    Filed: August 15, 2002
    Publication date: March 6, 2003
    Inventors: Birgit Driessen-Holscher, Joachim Kralik, Inga Ritzkopf, Christian Steffens, Guido Giffels, Claus Dreisbach, Thomas Prinz, Walter Lange
  • Patent number: 6462200
    Abstract: The invention relates to the preparation and use as catalysts of diphosphines of the formula (I) in which R is C6-C14-aryl or C4-C13-heteroaryl containing 1 to 3 heteroatoms selected from the group consisting of nitrogen, oxygen, and sulfur, wherein the aryl and heteroaryl radicals may optionally be substituted by halogen, C1-C6-alkyl, C1-C6-alkoxy, and/or trimethylsilyl, and R1 to R4, independently of one another, are each hydrogen, C1-C10-alkyl, C1-C10-alkoxy, F, Cl, or Br.
    Type: Grant
    Filed: September 7, 2001
    Date of Patent: October 8, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Birgit Driessen-Hölscher, Joachim Kralik, Inga Ritzkopf, Christian Steffens, Guido Giffels, Claus Dreisbach, Thomas Prinz, Walter Lange
  • Publication number: 20020055653
    Abstract: The invention relates to the preparation and use as catalysts of diphosphines of the formula (I) 1
    Type: Application
    Filed: September 7, 2001
    Publication date: May 9, 2002
    Inventors: Birgit Driessen-Holscher, Joachim Kralik, Inga Ritzkopf, Christian Steffens, Guido Giffels, Claus Dreisbach, Thomas Prinz, Walter Lange
  • Patent number: 6160168
    Abstract: Process for the preparation of octa-2,7-dienyl-1-amine by telomerization of butadiene with ammonia in a two-phase system in the presence of hydrophilic palladium complexes, characterized in that octa-2,7-dienyl-1-amine and octa-1,7-dienyl-3-amine are isolated separately from one another from the reaction mixture present after telomerization, and the octa-1,7-dienyl-3-amine isolated in this way is subjected to an isomerization reaction to form octa-2,7-dienyl-1-amine, and also novel triphenylphosphine mono- and dimethoxytri(sodium sulphonates) and the use of triphenylphosphine trimethoxytri(sodium sulphonates), triphenylphosphine trimethyltri(sodium sulphonates) and triphenylphosphine trifluorodi- and tri(sodium sulphonates) as ligands for the preparation of palladium complexes.
    Type: Grant
    Filed: February 24, 2000
    Date of Patent: December 12, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Joachim Traenckner, Jorg-Dietrich Jentsch, Thomas Prinz, Birgit Driessen-Holscher, Wilhelm Keim
  • Patent number: 6153780
    Abstract: Process for the preparation of octa-2,7-dienyl-1-amine by telomerization of butadiene with ammonia in a two-phase system in the presence of hydrophilic palladium complexes, characterized in that octa-2,7-dienyl-1-amine and octa-1,7-dienyl-3-amine are isolated separately from one another from the reaction mixture present after telomerization, and the octa-1,7-dienyl-3-amine isolated in this way is subjected to an isomerization reaction to form octa-2,7-dienyl-1-amine, and also novel triphenylphosphine mono- and dimethoxytri(sodium sulphonates) and the use of triphenylphosphine trimethoxytri(sodium sulphonates), triphenylphosphine trimethyltri(sodium sulphonates) and triphenylphosphine trifluorodi- and tri(sodium sulphonates) as ligands for the preparation of palladium complexes.
    Type: Grant
    Filed: February 24, 2000
    Date of Patent: November 28, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Joachim Traenckner, Jorg-Dietrich Jentsch, Thomas Prinz, Birgit Driessen-Holscher, Wilhelm Keim
  • Patent number: 6147238
    Abstract: Process for the preparation of octa-2,7-dienyl-1-amine by telomerization of butadiene with ammonia in a two-phase system in the presence of hydrophilic palladium complexes, characterized in that octa-2,7-dienyl-1-amine and octa-1,7-dienyl-3-amine are isolated separately from one another from the reaction mixture present after telomerization, and the octa-1,7-dienyl-3-amine isolated in this way is subjected to an isomerization reaction to form octa-2,7-dienyl-1-amine, and also novel triphenylphosphine mono- and dimethoxytri(sodium sulphonates) and the use of triphenylphosphine trimethoxytri(sodium sulphonates), triphenylphosphine trimethyltri(sodium sulphonates) and triphenylphosphine trifluorodi- and tri(sodium sulphonates) as ligands for the preparation of palladium complexes.
    Type: Grant
    Filed: February 24, 2000
    Date of Patent: November 14, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Joachim Traenckner, Jorg-Dietrich Jentsch, Thomas Prinz, Birgit Driessen-Holscher, Wilhelm Keim
  • Patent number: 6084113
    Abstract: In a process for the telomerization of dienes with nucleophiles in a liquid two-phase system, use is made as catalysts of complexes comprising a transition metal as central atom and at least one tris-(hydroxyalkyl)-phosphine or -phosphine oxide as ligand. The use as catalysts of compounds comprising a transition metal as central atom and at least one tris-(hydroxy-C.sub.2 -C.sub.5 -alkyl)-phosphine or -phosphine oxide as ligand, new compounds of this type and aqueous solutions of such compounds are likewise described.
    Type: Grant
    Filed: July 22, 1998
    Date of Patent: July 4, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Birgit Driessen-Holscher, Wilhelm Keim, Thomas Prinz, Hans-Joachim Traenckner, Jorg-Dietrich Jentsch
  • Patent number: 6051738
    Abstract: Process for the preparation of octa-2,7-dienyl-1-amine by telomerization of butadiene with ammonia in a two-phase system in the presence of hydrophilic palladium complexes, characterized in that octa-2,7-dienyl-1-amine and octa-1,7-dienyl-3-amine are isolated separately from one another from the reaction mixture present after telomerization, and the octa-1,7-dienyl-3-amine isolated in this way is subjected to an isomerization reaction to form octa-2,7-dienyl-1-amine, and also novel triphenylphosphine mono- and dimethoxytri(sodium sulphonates) and the use of triphenylphosphine trimethoxytri(sodium sulphonates), triphenylphosphine trimethyltri(sodium sulphonates) and triphenylphosphine trifluorodi- and tri(sodium sulphonates) as ligands for the preparation of palladium complexes.
    Type: Grant
    Filed: February 25, 1999
    Date of Patent: April 18, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Joachim Traenckner, Jorg-Dietrich Jentsch, Thomas Prinz, Birgit Driessen-Holscher, Wilhelm Keim
  • Patent number: 5834611
    Abstract: In a process for the telomerization of dienes with nucleophiles in a liquid two-phase system, use is made as catalysts of complexes comprising a transition metal as central atom and at least one tris-(hydroxyalkyl)-phosphine or -phosphine oxide as ligand. The use as catalysts of compounds comprising a transition metal as central atom and at least one tris-(hydroxy-C.sub.2 -C.sub.5 -alkyl)-phosphine or -phosphine oxide as ligand, new compounds of this type and aqueous solutions of such compounds are likewise described.
    Type: Grant
    Filed: June 19, 1997
    Date of Patent: November 10, 1998
    Assignee: Bayer Aktiengesellschaft
    Inventors: Birgit Driessen-Holscher, Wilhelm Keim, Thomas Prinz, Hans-Joachim Traenckner, Jorg-Dietrich Jentsch
  • Patent number: 5756846
    Abstract: Octa-2,7-dienyl-1-amine and octa-1,7-dienyl-3-amine, from which octyl-1-amine can be prepared, are prepared selectively by telomerizing butadiene and ammonia in a two-phase system, the catalyst being used in an aqueous phase and an organic medium which is immiscible or only slightly miscible with water being employed as the second phase.
    Type: Grant
    Filed: November 4, 1996
    Date of Patent: May 26, 1998
    Assignee: Bayer Aktiengesellschaft
    Inventors: Birgit Driessen-Holscher, Wilhelm Keim, Thomas Prinz, Hans-Joachim Traenckner, Jorg-Dietrich Jentsch