Patents Assigned to Kenegafuchi Kagaku Kogyo Kabushiki Kaisha
  • Process for preparing 5-hydroxyhydantoin
    Patent number: 5110944
    Abstract: A process for preparing 5-hydroxyhydantoin which comprises oxidizing 4,5-dihydroxyimidazolin-2-one having formula (I): ##STR1## with hydrogen peroxide in an aqueous medium in the presence of a metal ion. According to the process, 5-hydroxyhydantoin is readily prepared from inexpensive starting materials.
    Type: Grant
    Filed: February 20, 1991
    Date of Patent: May 5, 1992
    Assignee: Kenegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Masahiko Yamada, Satomi Takahashi