Patents by Inventor Ritsuzui Pan

Ritsuzui Pan 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).

  • Methods for producing optically active alcohols
    Patent number: 7645599
    Abstract: A method for producing optically active alcohols is provided. Optically active alcohols are useful intermediates in pharmaceutical production. The method of the present invention enables simple and efficient production of optically active alcohols with a high optical purity. According to the production method disclosed, optically active alcohols are produced via asymmetric reduction of 3-quinuclidinone using tropinone reductase-I. For example, the use of tropinone reductase-I derived from plants like Datura stramonium and Hyoscyamus niger allows the production of high optical purity (R)-3-quinuclidinol.
    Type: Grant
    Filed: June 13, 2005
    Date of Patent: January 12, 2010
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Hiroaki Yamamoto, Momoko Ueda, Ritsuzui Pan, Takeshi Hamatani
  • Methods for producing optically active alcohols
    Publication number: 20050227336
    Abstract: A method for producing optically active alcohols is provided. Optically active alcohols are useful intermediates in pharmaceutical production. The method of the present invention enables simple and efficient production of optically active alcohols with a high optical purity. According to the production method disclosed, optically active alcohols are produced via asymmetric reduction of 3-quinuclidinone using tropinone reductase-I. For example, the use of tropinone reductase-I derived from plants like Datura stramonium and Hyoscyamus niger allows the production of high optical purity (R)-3-quinuclidinol as shown in Formula (1) below.
    Type: Application
    Filed: June 13, 2005
    Publication date: October 13, 2005
    Applicant: Daicel Chemical Industries, Ltd.
    Inventors: Hiroaki Yamamoto, Momoko Ueda, Ritsuzui Pan, Takeshi Hamatani
  • Methods for producing optically active alcohols
    Publication number: 20030143700
    Abstract: A method for producing optically active alcohols is provided. Optically active alcohols are useful intermediates in pharmaceutical production. The method of the present invention enables simple and efficient production of optically active alcohols with a high optical purity. According to the production method disclosed, optically active alcohols are produced via asymmetric reduction of 3-quinuclidinone using tropinone reductase-I. For example, the use of tropinone reductase-I derived from plants like Datura stramonium and Hyoscyamus niger allows the production of high optical purity (R)-3-quinuclidinol as shown in Formula (1) below.
    Type: Application
    Filed: December 6, 2002
    Publication date: July 31, 2003
    Inventors: Hiroaki Yamamoto, Momoko Ueda, Ritsuzui Pan, Takeshi Hamatani