Patents by Inventor Ryusuke Doi

Ryusuke Doi 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).

  • 9-azanoradamantane N—oxyl compound and method for producing same, and organic oxidation catalyst and method for oxidizing alcohols using 9-azanoradamantane N—oxyl compound
    Patent number: 9114390
    Abstract: An organocatalyst for oxidizing alcohols in which a primary alcohol is selectively oxidized in a polyol substrate having a plurality of alcohols under environmentally-friendly conditions. The organic oxidation catalyst has an oxygen atom bonded to a nitrogen atom of an azanoradamantane skeleton and at least one alkyl group at positions 1 and 5. The oxidation catalyst has higher activity than TEMPO, which is an existing oxidation catalyst, in the selective oxidation reaction of primary alcohols, and better selectivity than AZADO and 1-Me-AZADO. This DMN-AZADO can be applied to the selective oxidation reaction of primary alcohols that contributes to shortening the synthesizing process for pharmaceuticals, pharmaceutical raw materials, agricultural chemicals, cosmetics, organic materials, and other such high value-added organic compounds.
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: August 25, 2015
    Assignee: TOHOKU UNIVERSITY
    Inventors: Yoshiharu Iwabuchi, Masatoshi Shibuya, Ryusuke Doi
  • 9-AZANORADAMANTANE N-OXYL COMPOUND AND METHOD FOR PRODUCING SAME, AND ORGANIC OXIDATION CATALYST AND METHOD FOR OXIDIZING ALCOHOLS USING 9-AZANORADAMANTANE N-OXYL COMPOUND
    Publication number: 20150031887
    Abstract: An organocatalyst for oxidizing alcohols in which a primary alcohol is selectively oxidized in a polyol substrate having a plurality of alcohols under environmentally-friendly conditions. The organic oxidation catalyst has an oxygen atom bonded to a nitrogen atom of an azanoradamantane skeleton and at least one alkyl group at positions 1 and 5. The oxidation catalyst has higher activity than TEMPO, which is an existing oxidation catalyst, in the selective oxidation reaction of primary alcohols, and better selectivity than AZADO and 1-Me-AZADO. This DMN-AZADO can be applied to the selective oxidation reaction of primary alcohols that contributes to shortening the synthesizing process for pharmaceuticals, pharmaceutical raw materials, agricultural chemicals, cosmetics, organic materials, and other such high value-added organic compounds.
    Type: Application
    Filed: February 22, 2013
    Publication date: January 29, 2015
    Inventors: Yoshiharu Iwabuchi, Masatoshi Shibuya, Ryusuke Doi