Patents by Inventor Takaaki Kamishima

Takaaki Kamishima 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).

  • Optically-active cyclopentenone derivatives
    Patent number: 11407772
    Abstract: The present invention provides: industrially desirable and novel optically-active cyclopentenone derivatives; and a novel industrial manufacturing method. The novel optically-active cyclopentenone derivatives and method for manufacturing the same are, respectively: an intermediate for industrially desirable and novel prostaglandin derivatives and the like; and a method for manufacturing the same. It is expected that the present invention will be commercialized and industrialized.
    Type: Grant
    Filed: September 13, 2019
    Date of Patent: August 9, 2022
    Assignees: Tohoku University, Genesis Research Institute, Inc., Ouchi Shinko Chemical Industrial Co., Ltd.
    Inventors: Hitoshi Kasai, Yoshitaka Koseki, Takaaki Kamishima, Shigenobu Aoyagi
  • OPTICALLY-ACTIVE CYCLOPENTENONE DERIVATIVES
    Publication number: 20210300953
    Abstract: The present invention provides: industrially desirable and novel optically-active cyclopentenone derivatives; and a novel industrial manufacturing method. The novel optically-active cyclopentenone derivatives and method for manufacturing the same are, respectively: an intermediate for industrially desirable and novel prostaglandin derivatives and the like; and a method for manufacturing the same. It is expected that the present invention will be commercialized and industrialized.
    Type: Application
    Filed: September 13, 2019
    Publication date: September 30, 2021
    Inventors: Hitoshi Kasai, Yoshitaka Koseki, Takaaki Kamishima, Shigenobu Aoyagi
  • Production method for cyclopentenone derivative
    Patent number: 11014865
    Abstract: [Problem] The present invention provides an industrially-preferable, cost-efficient, low-cost production method for 4-hydroxy-2-hydroxymethyl-2-cyclopenten-1-one (a compound represented by formula (I)) useful as a medicine, an agricultural chemical, or a raw material or intermediate of a medicine, an agricultural chemical, or the like. [Solution] According to the present invention, this compound represented by formula (I) is produced by subjecting an easily available compound represented by formula (II) (tri-O-acetyl-D-glucal) to a heating reaction in pressurized water.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: May 25, 2021
    Assignees: Tohoku University, Genesis Research Institute, Inc.
    Inventors: Yoshitaka Koseki, Hitoshi Kasai, Takaaki Kamishima
  • PRODUCTION METHOD FOR CYCLOPENTENONE DERIVATIVE
    Publication number: 20210024444
    Abstract: [Problem] The present invention provides an industrially-preferable, cost-efficient, low-cost production method for 4-hydroxy-2-hydroxymethyl-2-cyclopenten-1-one (a compound represented by formula (I)) useful as a medicine, an agricultural chemical, or a raw material or intermediate of a medicine, an agricultural chemical, or the like. [Solution] According to the present invention, this compound represented by formula (I) is produced by subjecting an easily available compound represented by formula (II) (tri-O-acetyl-D-glucal) to a heating reaction in pressurized water.
    Type: Application
    Filed: February 12, 2019
    Publication date: January 28, 2021
    Inventors: Yoshitaka Koseki, Hitoshi Kasai, Takaaki Kamishima