Patents by Inventor Etsuko Hiro

Etsuko Hiro 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 producing 3-formylcyclopentanone derivatives
    Patent number: 4073799
    Abstract: A novel process for producing 3-formylcyclopentanone derivatives which are useful intermediates for syntheses of five-membered ring compounds such as prostaglandins is disclosed. In the process, 3-formylcyclopentanone derivatives are produced starting from .beta.-dicarbonyl compounds and azides through several-step reactions.
    Type: Grant
    Filed: February 25, 1976
    Date of Patent: February 14, 1978
    Assignee: (Zaidanhojin) Sagami Chemical Research Center
    Inventors: Kiyoshi Kondo, Daiei Tunemoto, Etsuko Hiro