Patents by Inventor Tetsuo Maruyama

Tetsuo Maruyama 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 pyrimidine
    Patent number: 3954756
    Abstract: 2-Alkyl-4-amino-5-formylaminomethylpyrimidine is produced in a higher yield and using less process steps than the known methods by subjecting .beta.-aminopropionitrile to formylation in the presence of metal alcoholate, subjecting the resulting metal salt of .alpha.-formyl-.beta.-formylaminopropionitrile to alkylation or acylation, followed by allowing the thus produced .alpha.-alkoxy (or acyloxy)-methylene-.beta.-formylaminopropionitrile to react with an amidine.
    Type: Grant
    Filed: May 10, 1973
    Date of Patent: May 4, 1976
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Tetsuo Maruyama, Iwao Mikami, Kazuo Imaoka