Patents by Inventor Shunichi Maemoto

Shunichi Maemoto 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 of manufacturing optically active (-)-2-halo-1-(substituted phenyl) ethanol by ketone reduction
    Patent number: 5266485
    Abstract: A method is proposed for manufacturing (-)-2-bromo-1-(3'-chlorophenyl) ethanol by bringing a 2-bromo-1-(3'-chlorophenyl) ethanone into contact with a microorganism belonging to 9 genuses including Ashbya genus and Brettanomycess genus to thereby reduce it asymmetrically into (-)-2-bromo-1-(3'-chlorophenyl) ethanol, and for manufacturing (-)-substituted styrene oxide by cyclizing the obtained alcohol under alkaline conditions. The (-)-substituted styrene oxide can be manufactured efficiently.
    Type: Grant
    Filed: March 6, 1992
    Date of Patent: November 30, 1993
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Ikuo Sawa, Yuko Konishi, Shunichi Maemoto, Junzo Hasegawa
  • Method for the preparation of optically active 3-hydroxypyrrolidine derivatives
    Patent number: 5187094
    Abstract: A method for the preparation of optically active 3-hydroxypyrrolidine derivatives is disclosed, which comprises the steps of: hydrolyzing a mixture of (R)- and (S)-N-benzyl-3-acyloxypyrrolidine by the use of microorganisms or enzymes with stereospecific esterase activity; and separating optically active N-benzyl-3-hydroxypyrrolidine and optically active N-benzyl-3-acyloxypyrrolidine from the hydrolysate obtained in the foregoing step.
    Type: Grant
    Filed: September 24, 1991
    Date of Patent: February 16, 1993
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Ikuo Sawa, Natsuki Mori, Shunichi Maemoto, Hidetoshi Kutsuki, Junzo Hasegawa