Patents by Inventor Ai Kameda

Ai Kameda 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 diarylpyridine derivatives
    Patent number: 11999724
    Abstract: The present invention relates to a novel method for producing diarylpyridine derivatives, and the object of the present invention is to provide a novel, industrially useful method. The present inventors developed a novel method for synthesizing pyridine rings without using palladium, a strong base, or a high-temperature reaction. In particular, they successfully developed a method that can be used to synthesize iminium salts as intermediates, synthesize cyano compounds from these iminium salts, and cyclize the cyano compounds into pyridines under very mild reaction conditions.
    Type: Grant
    Filed: July 3, 2019
    Date of Patent: June 4, 2024
    Assignee: Daiichi Sankyo Company, Limited
    Inventors: Yuichi Aki, Fumihiko Toriyama, Natsuki Sakurai, Ai Kameda, Tomokazu Ogura
  • Method for Producing Diarylpyridine Derivatives
    Publication number: 20210188823
    Abstract: The present invention relates to a novel method for producing diarylpyridine derivatives, and the object of the present invention is to provide a novel, industrially useful method. The present inventors developed a novel method for synthesizing pyridine rings without using palladium, a strong base, or a high-temperature reaction. In particular, they successfully developed a method that can be used to synthesize iminium salts as intermediates, synthesize cyano compounds from these iminium salts, and cyclize the cyano compounds into pyridines under very mild reaction conditions.
    Type: Application
    Filed: July 3, 2019
    Publication date: June 24, 2021
    Inventors: Yuichi Aki, Fumihiko Toriyama, Natsuki Sakurai, Ai Kameda, Tomokazu Ogura