Patents Assigned to Zen-Ichi Yoshida
  • Cyano substituted diphenoquinones and a process for preparing them
    Patent number: 4243601
    Abstract: Novel cyano substituted diphenoquinones of the formula, ##STR1## wherein X is a bromine atom or a cyano group, are useful as oxidizing agents and electron acceptors in charge-transfer complex formation owing to their high redox potentials. They may be easily prepared by oxidizing the corresponding cyano substituted biphenols with dinitrogen tetraoxide in an inert organic solvent.
    Type: Grant
    Filed: March 7, 1979
    Date of Patent: January 6, 1981
    Assignees: Ajinomoto Company Incorporated, Zen-Ichi Yoshida
    Inventors: Zen-ichi Yoshida, Shigeo Yoneda, Hideki Murata, Yutaka Yasuda, Saburo Nagakura