Patents by Inventor Naota YOKOYAMA

Naota YOKOYAMA 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).

  • CATALYST CONTAINING ACTIVATED CARBON ADSORBED WITH RUTHENIUM COMPLEX, AND METHOD FOR PRODUCING REDUCTION PRODUCT USING SAME
    Publication number: 20230285945
    Abstract: A catalyst exhibiting high reusability and capable of reducing the amount of residual metals in a reaction liquid in a process wherein an optically active reduction product is produced by an asymmetric reduction reaction of an organic compound is disclosed.
    Type: Application
    Filed: March 2, 2021
    Publication date: September 14, 2023
    Applicants: TAKASAGO INTERNATIONAL CORPORATION, OSAKA GAS CHEMICALS CO., LTD.
    Inventors: Naota YOKOYAMA, Shinji TSUKADA, Takefumi CHISHIRO, Yusuke MIYAJI
  • Chiral tetradentate ligand, method for producing same and transition metal complex of said chiral tetradentate ligand
    Patent number: 11098074
    Abstract: The present invention relates to a compound represented by the formula (1A). G represents a group selected from the group consisting of a monovalent group represented by the formula (GP) and a monovalent group represented by the formula (GS). R4, R5, R6, R7, R8, R9, R10, R11, and R12 each independently represent a hydrogen atom or a group selected from the group consisting of an alkyl group, an alkenyl group, an aryl group, an aralkyl group, an alkoxy group, a halogeno group, and a halogeno alkyl group.
    Type: Grant
    Filed: February 6, 2019
    Date of Patent: August 24, 2021
    Assignee: TAKASAGO INTERNATIONAL CORPORATION
    Inventors: Yuji Nakayama, Naota Yokoyama
  • CHIRAL TETRADENTATE LIGAND, METHOD FOR PRODUCING SAME AND TRANSITION METAL COMPLEX OF SAID CHIRAL TETRADENTATE LIGAND
    Publication number: 20200369700
    Abstract: The present invention relates to a compound represented by the formula (1A). G represents a group selected from the group consisting of a monovalent group represented by the formula (GP) and a monovalent group represented by the formula (GS). R4, R5, R6, R7, R8, R9, R10, R11, and R12 each independently represent a hydrogen atom or a group selected from the group consisting of an alkyl group, an alkenyl group, an aryl group, an aralkyl group, an alkoxy group, a halogeno group, and a halogeno alkyl group.
    Type: Application
    Filed: February 6, 2019
    Publication date: November 26, 2020
    Applicant: TAKASAGO INTERNATIONAL CORPORATION
    Inventors: Yuji NAKAYAMA, Naota YOKOYAMA
  • NOVEL SPIROSESQUITERPENE COMPOUND, FLAVORING COMPOSITION AND FOOD/DRINK CONTAINING SAID COMPOUND, AND METHOD FOR PRODUCING SAID FOOD/DRINK
    Publication number: 20200229474
    Abstract: The present invention pertains to a compound represented by formula (1) with which it is possible to impart or enhance an aroma and flavor associated with the feeling of a highly natural fruit or fruit juice, or ripeness. The present invention also pertains to a flavoring composition containing said compound, a food/drink containing said compound or said flavoring composition, and a method for producing said food/drink.
    Type: Application
    Filed: February 27, 2018
    Publication date: July 23, 2020
    Applicant: TAKASAGO INTERNATIONAL CORPORATION
    Inventors: Shingo CHIBA, Aki KURABE, Akihiro KAWARAYA, Yumi KUSANO, Naota YOKOYAMA, Atsuo NAKAZAKI
  • Tetradentate ligand, and production method therefor, synthetic intermediate thereof, and transition metal complex thereof
    Patent number: 10550141
    Abstract: The present invention relates to: a compound as a ligand in a variety of catalytic organic synthetic reactions; a method for producing the compound; a synthetic intermediate of the compound; and a transition metal complex which has the compound as a ligand.
    Type: Grant
    Filed: March 30, 2017
    Date of Patent: February 4, 2020
    Assignee: TAKASAGO INTERNATIONAL CORPORATION
    Inventors: Yuji Nakayama, Naota Yokoyama
  • TETRADENTATE LIGAND, AND PRODUCTION METHOD THEREFOR, SYNTHETIC INTERMEDIATE THEREOF, AND TRANSITION METAL COMPLEX THEREOF
    Publication number: 20190127407
    Abstract: The present invention relates to: a compound as a ligand in a variety of catalytic organic synthetic reactions; a method for producing the compound; a synthetic intermediate of the compound; and a transition metal complex which has the compound as a ligand.
    Type: Application
    Filed: March 30, 2017
    Publication date: May 2, 2019
    Applicant: TAKASAGO INTERNATIONAL CORPORATION
    Inventors: Yuji NAKAYAMA, Naota YOKOYAMA
  • Phosphorus compound and transition metal complex of the same
    Patent number: 9416148
    Abstract: The present invention provides a compound represented by general formula (1) and a transition metal complex containing the compound as a ligand: wherein R1 to R10, N, P, Y, and Z have the meanings as defined in DESCRIPTION.
    Type: Grant
    Filed: March 4, 2015
    Date of Patent: August 16, 2016
    Assignee: TAKASAGO INTERNATIONAL CORPORATION
    Inventors: Yuji Nakayama, Naota Yokoyama
  • PHOSPHORUS COMPOUND AND TRANSITION METAL COMPLEX OF THE SAME
    Publication number: 20150307531
    Abstract: The present invention provides a compound represented by general formula (1) and a transition metal complex containing the compound as a ligand: wherein R1 to R10, N, P, Y, and Z have the meanings as defined in DESCRIPTION.
    Type: Application
    Filed: March 4, 2015
    Publication date: October 29, 2015
    Applicant: TAKASAGO INTERNATIONAL CORPORATION
    Inventors: Yuji NAKAYAMA, Naota YOKOYAMA
  • PHOSPHOROUS COMPOUND AND TRANSITION METAL COMPLEX THEREOF
    Publication number: 20150065738
    Abstract: The present invention provides a phosphorous compound represented by general formula (1), and transition metal complexes containing such phosphorous compounds as ligands: wherein R1 to R7, A, B, Y, and Z have the same meanings as those defined in the specification.
    Type: Application
    Filed: August 22, 2014
    Publication date: March 5, 2015
    Applicant: TAKASAGO INTERNATIONAL CORPORATION
    Inventors: Naota YOKOYAMA, Yuji NAKAYAMA