Patents by Inventor Hirokazu Suda

Hirokazu Suda 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).

  • Process for the production of 2-pyridylpyridine derivatives
    Patent number: 6504032
    Abstract: A process for producing a 2-pyridylpyridine derivative usable as an intermediate for medicines or agricultural chemicals is provided, which does not require expensive metal catalysts, which does not cause environmental problems, and which can be conducted on an industiral scale. The process comprises the step (A) of producing an amidrazone compound from a cyano group-containing heterocyclic compound in water, the step (B) of producing a 1,2,4-triazine compound from the amidrazone compound in water, and the step (C) of producing a 2-pyridylpyridine derivative from the 1,2,4-triazine compound.
    Type: Grant
    Filed: December 12, 2001
    Date of Patent: January 7, 2003
    Assignee: Sankio Chemical Co., Ltd.
    Inventors: Fumiaki Ikeuchi, Taichi Shintou, Hirokazu Suda
  • Process for the production of 2-pyridylpyridine derivatives
    Patent number: 6489483
    Abstract: A process for producing a 2-pyridylpyridine derivative usable as an intermediate for medicines or agricultural chemicals is provided, which does not require expensive special catalysts and special equipment, which does not cause environmental problems, and which can be conducted on an industiral scale. The process comprises reacting an acetyl-substituted pyridine derivative with a 3-amino acrolein, then reacting the reaction product with ammonia or an ammonium salt.
    Type: Grant
    Filed: December 13, 2001
    Date of Patent: December 3, 2002
    Assignee: Sankio Chemical Co., Ltd.
    Inventors: Hirokazu Suda, Ken Umihara