Patents by Inventor Eiichirou Hata

Eiichirou Hata 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 preparation of binary indole alkaloids
    Patent number: 5432279
    Abstract: The present invention relates to a process for the preparation, from e.g. anhydrovinblastine, of binary indole alkaloids effective as an anti-cancer drug, such as vinblastine, leurosidine, etc., wherein a trivalent iron source and hydride source are added in the presence of oxygen, thereby increasing a yield of an object compound. The yield of an object compound is improved still more by further addition, to the reaction system, of an oxalic acid ion source, malonic acid ion source, inorganic anion source, amino acid, etc.
    Type: Grant
    Filed: May 3, 1993
    Date of Patent: July 11, 1995
    Assignee: Mitsui Petrochemical Industries, Inc.
    Inventors: Naoya Sakamoto, Hiroaki Tan, Eiichirou Hata, Noriaki Kihara