Patents by Inventor Jai Kook Byun

Jai Kook Byun 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).

  • Phenylalkylaminoalcohol carbamates and process for preparing the same
    Patent number: 5955499
    Abstract: O-carbamoyl-(D/L )-phenylalaninol represented by structural formula I is pharmaceutically useful to treat diseases of the central nervous system, which is prepared by a characteristic process comprising the steps of: treating phenylalaninol with benzyl chloroformate in a basic aqueous solution medium, to give N-benzyloxycarbonyl-phenylalaninol; subjecting this intermediate to reaction with phosgene and then, to the treatment with excess of concentrated ammonium hydroxide aqueous solution, to provide O-carbamoyl-N-benzyloxycarbonyl-phenylalaninol; deprotecting it through hydrogenolysis reaction.
    Type: Grant
    Filed: July 1, 1996
    Date of Patent: September 21, 1999
    Assignee: Yukong Limited
    Inventors: Yong Moon Choi, Jai Kook Byun