Patents by Inventor Irina Jovel

Irina Jovel 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).

  • Preparation of ?-hydroxy ketones via carbene-catalyzed umpolung reaction of aldehydes
    Patent number: 7504542
    Abstract: The present invention relates to the preparation of ?-hydroxy ketones of the general formula I. In particular, the invention relates to novel imidazolinium carboxylate adducts and to a novel process for using catalytic amounts of imidazolium and imidazolinium carboxylate adducts in the acyloin reaction of aldehydes to prepare hydroxy ketones of the general formula I, where R and R? are the same or different and are each H or a straight-chain or branched and optionally substituted C1-C12-alkyl radical, and R??H3CSCH2CH2, t-butyl, n-butyl, sec-butyl, n-propyl, i-propyl, an optionally heteroatom-substituted C6-C18-aryl, heteroaryl, C6-C18-arylalkyl, especially phenylmethyl, where phenyl may again be heteroatom-substituted, or heteroalkyl.
    Type: Grant
    Filed: August 10, 2007
    Date of Patent: March 17, 2009
    Assignee: Evonik Degussa GmbH
    Inventors: Ralf Jackstell, Irina Jovel, Matthias Beller, Martin Hateley, Christoph Weckbecker, Klaus Huthmacher
  • Preparation of alpha-hydroxy ketones via carbene-catalyzed umpolung reaction of aldehydes
    Publication number: 20080051608
    Abstract: The present invention relates to the preparation of ?-hydroxy ketones of the general formula I. In particular, the invention relates to novel imidazolinium carboxylate adducts and to a novel process for using catalytic amounts of imidazolium and imidazolinium carboxylate adducts in the acyloin reaction of aldehydes to prepare hydroxy ketones of the general formula I, where R and R? are the same or different and are each H or a straight-chain or branched and optionally substituted C1-C12-alkyl radical, and R??H3CSCH2CH2, t-butyl, n-butyl, sec-butyl, n-propyl, i-propyl, an optionally heteroatom-substituted C6-C18-aryl, heteroaryl, C6-C18-arylalkyl, especially phenylmethyl, where phenyl may again be heteroatom-substituted, or heteroalkyl.
    Type: Application
    Filed: August 10, 2007
    Publication date: February 28, 2008
    Applicant: Degussa GmbH
    Inventors: Ralf Jackstell, Irina Jovel, Matthias Beller, Martin Hateley, Christoph Weckbecker, Klaus Huthmacher