Patents by Inventor Jik Chin

Jik Chin 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).

  • CHIRAL GUANIDINES, SALTS THEREOF, METHODS OF MAKING CHIRAL GUANIDINES AND SALTS THEREOF, AND USES OF CHIRAL GUANIDINES AND SALTS THEREOF IN THE PREPARATION OF ENANTIOMERICALLY PURE AMINO ACIDS
    Publication number: 20230028700
    Abstract: Provided are compounds and salts having a structure of Formula (I) or (II): (I), and (II) wherein: both of the chiral carbon atoms denoted by “*” are both in the R configuration or both in the S configuration. Compounds and salts of Formulae (I) and (II) are useful in the preparation of enantiomerically pure amino acids. Conversion of amino acids to D-form from any of L-form, racemate or other enantiomerically impure mixtures or conversion of amino acids to L-form from any of D-form, racemate or other enantiomerically impure mixtures is disclosed.
    Type: Application
    Filed: November 2, 2020
    Publication date: January 26, 2023
    Inventors: Rui FU, Jik CHIN, Soon Mog SO
  • Cinchona-based bifucntional organocatalysts and method for preparing chiral hemiesters using the same
    Patent number: 8580964
    Abstract: The present invention relates to cinchona-based bifunctional organocatalysts and methods for preparing chiral hemiesters using the same. More specifically, the present invention relates to methods for preparing chiral hemiesters from prochiral or meso cyclic acid anhydrides via desymmetrization, using bifunctional cinchona alkaloid catalysts comprising sulfonamide functional groups.
    Type: Grant
    Filed: January 18, 2011
    Date of Patent: November 12, 2013
    Assignee: Sungkyunkwan University Foundation for Corporate Collaboration
    Inventors: Choong Eui Song, Sang Ho Oh, Ho Sik Rho, Ji Woong Lee, Je Wun Lee, Sung Hoon Youk, Jik Chin
  • CINCHONA-BASED BIFUNCTIONAL ORGANOCATALYSTS AND METHOD FOR PREPARING CHIRAL HEMIESTERS USING THE SAME
    Publication number: 20110213151
    Abstract: The present invention relates to cinchona-based bifunctional organocatalysts and methods for preparing chiral hemiesters using the same. More specifically, the present invention relates to methods for preparing chiral hemiesters from prochiral or meso cyclic acid anhydrides via desymmetrization, using bifunctional cinchona alkaloid catalysts comprising sulfonamide functional groups.
    Type: Application
    Filed: January 18, 2011
    Publication date: September 1, 2011
    Applicant: SUNGKYUNKWAN UNIVERSITY FOUNDATION FOR CORPORATE COLLABORATION
    Inventors: Choong Eui SONG, Sang Ho OH, Ho Sik RHO, Ji Woong LEE, Je Wun LEE, Sung Hoon YOUK, Jik CHIN
  • Binaphthol derivatives and their use in optical resolution or optical transformation
    Patent number: 7268252
    Abstract: Disclosed herein are novel binaphthol derivatives and methods for the optical resolution of amino acids or amino alcohols and for the optical transformation of D, L-forms of amino acids using the same.
    Type: Grant
    Filed: January 30, 2006
    Date of Patent: September 11, 2007
    Assignee: Green of Life Co., Ltd.
    Inventors: Kwan Mook Kim, Won Woo Nam, Hyun Jung Park, Jik Chin
  • Binaphthol derivatives and their use in optical resolution or optical transformation
    Publication number: 20060173211
    Abstract: Disclosed herein are novel binaphthol derivatives and methods for the optical resolution of amino acids or amino alcohols and for the optical transformation of D, L-forms of amino acids using the same.
    Type: Application
    Filed: January 30, 2006
    Publication date: August 3, 2006
    Inventors: Kwan Kim, Won Nam, Hyun Park, Jik Chin