Patents by Inventor Hajo LEHMANN

Hajo LEHMANN 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).

  • Intermolecular reaction of propargyl ethers with dimethylfuran in the presence of gold(I) complexes
    Patent number: 10815178
    Abstract: The present invention relates to a method of preparing ortho substituted phenols from 2,5-dimethylfuran and propargyl ethers in the presence of a gold(I) complex. It is particularly advantageous to use 2,5-dimethylfuran as this offers an ecological beneficial synthesis of said ortho substituted phenols.
    Type: Grant
    Filed: December 19, 2019
    Date of Patent: October 27, 2020
    Assignee: DSM IP ASSETS B.V.
    Inventors: Ulla Letinois, Stephan Ackermann, Jonathan Alan Medlock, Hajo Lehmann
  • INTERMOLECULAR REACTION OF PROPARGYL ETHERS WITH DIMETHYLFURAN IN THE PRESENCE OF GOLD(I) COMPLEXES
    Publication number: 20200123087
    Abstract: The present invention relates to a method of preparing ortho substituted phenols from 2,5-dimethylfuran and propargyl ethers in the presence of a gold(I) complex. It is particularly advantageous to use 2,5-dimethylfuran as this offers an ecological beneficial synthesis of said ortho substituted phenols.
    Type: Application
    Filed: December 19, 2019
    Publication date: April 23, 2020
    Inventors: Ulla LETINOIS, Stephan ACKERMANN, Jonathan Alan MEDLOCK, Hajo LEHMANN
  • INTERMOLECULAR REACTION OF PROPARGYL ETHERS WITH DIMETHYLFURAN IN THE PRESENCE OF GOLD(I) COMPLEXES
    Publication number: 20180370887
    Abstract: The present invention relates to a method of preparing ortho substituted phenols from 2,5-dimethylfuran and propargyl ethers in the presence of a gold(I) complex. It is particularly advantageous to use 2,5-dimethylfuran as this offers an ecological beneficial synthesis of said ortho substituted phenols.
    Type: Application
    Filed: November 28, 2016
    Publication date: December 27, 2018
    Applicant: DSM IP Assets B.V.
    Inventors: Ulla LETINOIS, Stephan ACKERMANN, Jonathan Alan MEDLOCK, Hajo LEHMANN