Patents by Inventor Ingrid Grassert

Ingrid Grassert 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).

  • Method of producing aryl-substituted, amino-acylated phosphonic-acid derivatives with the aid of metal complexes of chiral, amphiphilic ligands
    Patent number: 5886217
    Abstract: The invention is relates to a method of producing aryl-substituted, amino-acylated phosphonic-acid derivatives with the aid of metal complexes of chiral amphiphilic ligands in that according to the invention .alpha.-N-acyl-protected, .beta.-substituted alkene phosphone derivatives are asymmetrically hydrogenated in the presence of a chiral rhodium catalyst in a solvent or a suspension. The use of the micelle-forming catalyst makes possible the hydrogenation of unsaturated phosphonic-acid derivatives in water with a high reaction rate with the obtainment of very good enantiomeric excesses.
    Type: Grant
    Filed: November 20, 1997
    Date of Patent: March 23, 1999
    Assignee: Degussa Aktiengesellschaft
    Inventors: Gunther Oehme, Ute Schmidt, Silke Ziegler, Ingrid Grassert, Christine Fischer