Patents by Inventor Kaichi Tanida

Kaichi Tanida 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).

  • Synthesis method of physiologically active delta-lactone
    Patent number: 5463085
    Abstract: A synthesis method of physiologically active .delta.-lactone, which comprises addition-reacting diethyl methylmalonate and methacrolein in the presence of a base.
    Type: Grant
    Filed: June 9, 1994
    Date of Patent: October 31, 1995
    Assignee: Nitto Denko Corporation
    Inventors: Tetsuo Omata, Kaichi Tanida
  • Optically active fluorine-containing 3-hydroxybutyric acid esters and process for producing the same
    Patent number: 5118836
    Abstract: An optically active (3R)- or (3S)-fluorine-containing-3-hydroxybutyric acid ester represented by the formula: ##STR1## wherein R represents an alkyl group of C.sub.3 -C.sub.16 and A represents CF.sub.3, CHF.sub.2 or CH.sub.2 F, which is useful for synthesis of optically active substances, is prepared with high optical purity by ester exchange reaction between an alcohol represented by the formula:ROHwherein R is as defined above and optically active (3R)- or (3S)-fluorine-containing-3-hydroxybutyric acid ethyl ester of ##STR2## in the presence of an ammonium salt of sulfonic acid.
    Type: Grant
    Filed: November 8, 1990
    Date of Patent: June 2, 1992
    Assignee: Showa Shell Sekiyu Kabushiki Kaisha
    Inventors: Kaichi Tanida, Yoshiichi Suzuki