Patents by Inventor Hansjoerg Gruendler

Hansjoerg Gruendler 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).

  • Catalytic isomerization of Z-pentol to E-pentol
    Patent number: 6465698
    Abstract: A process for catalytically isomerizing Z-3-methylpent-2-en-4-yn-1-ol to E-3-methylpent-2-en-4-yn-1-ol is provided. This process includes contacting a stereoisomeric mixture containing Z-3-methylpent-2-en-4-yn-1-ol and E-3-methylpent-2-en-4-yn-1-ol with a source of bromine radicals in a two-phase reaction mixture having an aqueous phase and a stereoisomeric mixture phase, intermixing the reaction mixture, and heating the reaction mixture to a temperature from about −10° C. to about 100° C.
    Type: Grant
    Filed: June 11, 2001
    Date of Patent: October 15, 2002
    Assignee: Roche Vitamins, Inc.
    Inventors: Arnold Gloor, Hansjoerg Gruendler, Werner Simon
  • Catalytic isomerization of Z-pentol to E-pentol
    Publication number: 20020042547
    Abstract: A process for catalytically isomerizing Z-3-methylpent-2-en-4-yn-1-ol to E-3-methylpent-2-en-4-yn-1-ol is provided. This process includes contacting a stereoisomeric mixture containing Z-3-methylpent-2-en-4-yn-1-ol and E-3-methylpent-2-en-4-yn-1-ol with a source of bromine radicals in a two-phase reaction mixture having an aqueous phase and a stereoisomeric mixture phase, intermixing the reaction mixture, and heating the reaction mixture to a temperature from about −10° C. to about 100° C.
    Type: Application
    Filed: June 11, 2001
    Publication date: April 11, 2002
    Applicant: Roche Vitamins Inc.
    Inventors: Arnold Gloor, Hansjoerg Gruendler, Werner Simon