Patents by Inventor Kunihiro Toyoda

Kunihiro Toyoda 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 the preparation of optically active 7-substituted-3-(2-aminopropyl)indole derivatives and intermediates therefor
    Patent number: 7115412
    Abstract: Disclosed are a process for preparation of an optically active 7-substituted 3-(2-aminopropyl)indole compound and an intermediate therefor. In the above preparation process, 7-substituted indole is reacted with L- or DL-serine in the presence of a tryptophan-synthesizing enzyme originating in microorganisms to form corresponding 7-substituted L-tryptophan, and it is subjected, if necessary, to reduction, protection, exchange and elimination.
    Type: Grant
    Filed: March 30, 2001
    Date of Patent: October 3, 2006
    Assignees: Mercian Corporation, Dainippon Pharmaceutical Co., Ltd.
    Inventors: Takao Narita, Kunihiro Toyoda, Yoichiro Hirose, Toshio Tsuchida, Shiro Kato, Hiroshi Harada, Akihito Fujii
  • Process for the preparation of optically active 7-substituted 3-(2-aminopropyl)indole derivatives and intermediates therefor
    Publication number: 20030181732
    Abstract: Disclosed are a process for preparation of an optically active 7-substituted 3-(2-aminopropyl)indole compound and an intermediate therefor. In the above preparation process, 7-substituted indole is reacted with L- or DL-serine in the presence of a tryptophan-synthesizing enzyme originating in microorganisms to form corresponding 7-substituted L-tryptophan, and it is subjected, if necessary, to reduction, protection, exchange and elimination.
    Type: Application
    Filed: December 6, 2002
    Publication date: September 25, 2003
    Inventors: Takao Narita, Kunihiro Toyoda, Yoichiro Hirose, Toshio Tsuchida, Shiro Kato, Hiroshi Harada, Akihito Fujii