Patents by Inventor Christian A. Sandoval

Christian A. Sandoval 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).

  • Ruthenium complexes having hybrid amine ligands, their preparation and use
    Patent number: 8563739
    Abstract: The invention relates to a novel class of ruthenium complexes containing phosphine and hybrid amine ligands, their preparation and use as catalysts in the reduction of simple ketones to alcohols by molecular hydrogenation. The reactivity and enantioselectivity of such complexes in the asymmetric hydrogenation of simple ketones could be enhanced by the addition of some selective additives.
    Type: Grant
    Filed: June 12, 2009
    Date of Patent: October 22, 2013
    Assignees: Enantiotech Corporation Limited, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences
    Inventors: Christian A Sandoval, Yue-hui Li
  • Novel Ruthenium Complexes Having Hybrid Amine Ligands, Their Preparation And Use
    Publication number: 20110092712
    Abstract: The invention relates to a novel class of ruthenium complexes containing phosphine and hybrid amine ligands, their preparation and use as catalysts in the reduction of simple ketones to alcohols by molecular hydrogenation. The reactivity and enantioselectivity of such complexes in the asymmetric hydrogenation of simple ketones could be enchanced by the addition of some selective additives.
    Type: Application
    Filed: June 12, 2009
    Publication date: April 21, 2011
    Inventors: Christian A. Sandoval, Yue-hui Li
  • Ruthenium complex and process for producing tert-alkyl alcohol therewith
    Patent number: 7378560
    Abstract: A tert-alkyl ketone, pinacolone was hydrogenated under pressurized hydrogen in the presence of a ruthenium complex (S)-1 and a base, and corresponding (S)-3,3,-dimethyl-2-butanol was thereby obtained in 100% yield and 97% ee
    Type: Grant
    Filed: October 24, 2005
    Date of Patent: May 27, 2008
    Assignees: Kanto Kangaku Kabushiki Kaisha, Nagoya Industrial Science Research Institute
    Inventors: Takeshi Ohkuma, Christian A. Sandoval, Ryoji Noyori
  • Ruthenium Complex and Process for Producing Tert-Alkyl Alcohol Therewith
    Publication number: 20070265448
    Abstract: A tert-alkyl ketone, pinacolone was hydrogenated under pressurized hydrogen in the presence of a ruthenium complex (S)-1 and a base, and corresponding (S)-3,3,-dimethyl-2-butanol was thereby obtained in 100% yield and 97% ee.
    Type: Application
    Filed: October 24, 2005
    Publication date: November 15, 2007
    Applicants: Kanto Kagaku Kabushiki Kaisha, Nagoya Industrial Science Research Insitute
    Inventors: Takeshi Ohkuma, Christian Sandoval, Ryoji Noyori