Patents by Inventor Yoshifumi HACHISU

Yoshifumi HACHISU 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).

  • Method for producing 3,6-disubstituted-imidazo[1,2-b]pyridazine derivative
    Patent number: 11667642
    Abstract: Provided is a novel and industrially useful method for producing a 3,6-disubstituted imidazo[1,2-b]pyridazine derivative. The present invention provides a method for producing a 3,6-disubstituted imidazo[1,2-b]pyridazine derivative, which uses 6-fluoroimidazo[1,2-b]pyridazine as a starting material, while using an aromatic substitution reaction that utilizes C—H activation by means of palladium.
    Type: Grant
    Filed: February 1, 2021
    Date of Patent: June 6, 2023
    Assignee: Daiichi Sankyo Company, Limited
    Inventors: Ryoji Koike, Yoshifumi Hachisu, Takafumi Kitawaki, Shohei Shiraishi
  • Method for Producing 3,6-Disubstituted-Imidazo[1,2-B]Pyridazine Derivative
    Publication number: 20210171532
    Abstract: Provided is a novel and industrially useful method for producing a 3,6-disubstituted imidazo[1,2-b]pyridazine derivative. The present invention provides a method for producing a 3,6-disubstituted imidazo[1,2-b]pyridazine derivative, which uses 6-fluoroimidazo[1,2-b]pyridazine as a starting material, while using an aromatic substitution reaction that utilizes C—H activation by means of palladium.
    Type: Application
    Filed: February 1, 2021
    Publication date: June 10, 2021
    Inventors: Ryoji Koike, Yoshifumi Hachisu, Takafumi Kitawaki, Shohei Shiraishi
  • Method for producing 3, 6-disubstituted imidazo[1, 2-b]pyridazine derivative
    Patent number: 11028091
    Abstract: Provided is a novel and industrially useful method for producing a 3, 6-disubstituted imidazo[1, 2-b]pyridazine derivative. The present invention provides a method for producing a 3, 6-disubstituted imidazo[1, 2-b]pyridazine derivative, which uses 6-fluoroimidazo[1, 2-b]pyridazine as a starting material, while using an aromatic substitution reaction that utilizes C—H activation by means of palladium.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: June 8, 2021
    Assignee: Daiichi Sankyo Company, Limited
    Inventors: Ryoji Koike, Yoshifumi Hachisu, Takafumi Kitawaki, Shohei Shiraishi
  • Method for Producing 3, 6-Disubstituted Imidazo[1, 2-b]Pyridazine Derivative
    Publication number: 20200062765
    Abstract: Provided is a novel and industrially useful method for producing a 3, 6-disubstituted imidazo[1, 2-b]pyridazine derivative. The present invention provides a method for producing a 3, 6-disubstituted imidazo[1, 2-b]pyridazine derivative, which uses 6-fluoroimidazo[1, 2-b]pyridazine as a starting material, while using an aromatic substitution reaction that utilizes C—H activation by means of palladium.
    Type: Application
    Filed: March 13, 2018
    Publication date: February 27, 2020
    Applicant: DAIICHI SANKYO COMPANY, LIMITED
    Inventors: Ryoji KOIKE, Yoshifumi HACHISU, Takafumi KITAWAKI, Shohei SHIRAISHI