Patents by Inventor Marc-André Mueller

Marc-André Mueller 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).

  • Hydrogenation of ketones having at least a carbon-carbon double bond in the ?,?-position
    Patent number: 9181163
    Abstract: The present invention relates in a first aspect to a process for hydrogenation of ketones having at least a carbon-carbon double bond in the y,8-position to the keto group by hydrogen in the presence of at least one chiral iridium complex of formula (I), where R1 represents a group of formula (II) or (III) or (IV). It has been shown that this process leads to a strong increase in preferential formation of a single isomer. The process is particularly suitable for the hydrogenation of y,8-unsaturated ketones which can be used as flavors and fragrances or for the preparation of vitamin E and its derivatives or of flavors and fragrances.
    Type: Grant
    Filed: June 13, 2012
    Date of Patent: November 10, 2015
    Assignee: DSM IP ASSETS B.V.
    Inventors: Marc-André Mueller, Andreas Pfaltz, Jonathan Medlock
  • HYDROGENATION OF KETONES HAVING AT LEAST A CARBON-CARBON DOUBLE BOND IN THE y, -POSITION
    Publication number: 20140249321
    Abstract: The present invention relates in a first aspect to a process for hydrogenation of ketones having at least a carbon-carbon double bond in the y,8-position to the keto group by hydrogen in the presence of at least one chiral iridium complex of formula (I), where R1 represents a group of formula (II) or (III) or (IV). It has been shown that this process leads to a strong increase in preferential formation of a single isomer. The process is particularly suitable for the hydrogenation of y,8-unsaturated ketones which can be used as flavours and fragrances or for the preparation of vitamin E and its derivatives or of flavours and fragrances.
    Type: Application
    Filed: June 13, 2012
    Publication date: September 4, 2014
    Applicant: DSM IP ASSETS B.V.
    Inventors: Marc-André Mueller, Andreas Pfaltz, Jonathan Medlock