Patents by Inventor Yumiko Hiyoshi

Yumiko Hiyoshi 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 preparing N.sub.1 -(2'-furanidyl)-5-fluorouracil
    Patent number: 4107162
    Abstract: Process for preparing N.sub.1 -(2'-furanidyl)-5-fluorouracil having effective pharmacological activities such as anti-leukemia and anti-tumor activities comprising reacting 2,4-bis(trialkylsilyl)-5-fluorouracil with 2,3-dihydrofuran in the presence of a proton donor and a catalyst. Such process can be simply, easily conducted to give the desired product having a high purity in good yield.
    Type: Grant
    Filed: November 9, 1976
    Date of Patent: August 15, 1978
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Nobuyuki Suzuki, Yukinari Kobayashi, Yumiko Hiyoshi, Seiji Takagi, Takanori Sone, Mikio Wakabayashi, Tuneo Sowa