Patents by Inventor Duk Won

Duk Won 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).

  • Publication number: 20070185337
    Abstract: A process for the preparation of chiral 4-hydroxy-2-oxo-1-pyrrolidine acetamide includes adding sodium cyanide together with citric acid to a solution of chiral epichlorohydrin to obtain chiral 3-chloro-2-hydroxypropionitrile by ring opening reaction of the chiral epichlorohydrin, reacting the obtained product with an alcohol containing hydrochloride gas to obtain chiral 4-chloro-3-hydroxybutyric acid ester, and reacting the obtained product in a presence of a base with glycinamide or with glycine ester accompanied by ammonolysis with ammonia to produce the targeted chiral 4-hydroxy-2-oxo-1-pyrrolidine acetamide.
    Type: Application
    Filed: May 25, 2005
    Publication date: August 9, 2007
    Applicants: AHN-GOOK PHARMACEUTICAL CO., LTD., RSTECH CORPORATION
    Inventors: Seong-Jin Kim, Chung-woo Lim, Chang Boo, Jung-hoon Oh, Ki Kim, Jae Lee, Duk Won