Patents by Inventor Moo-Il Qh

Moo-Il Qh 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).

  • Patent number: 5672711
    Abstract: The objective of this invention is to provide a process of manufacturing cephem derivatives expressed by the following formula (1), wherein the compound (2) is reacted with an condensing agent of the compound (4) and 1-hydroxy-6-trifluoromethyl benzotriazole(5) and the mixture is acylated with 7-aminocephosporanic acid (3) or its derivatives. ##STR1## According to this invention, a desirous product with high purity may be obtained, which is more cost-saving and industrially feasible than the conventional methods, under the following process steps: Without protecting amino group of organic acid (2), conversion of the reactive derivatives under mild temperature is made and the acylation is directly carried out to obtain the final product.
    Type: Grant
    Filed: June 28, 1996
    Date of Patent: September 30, 1997
    Assignee: Chong Kun Dang Corporation
    Inventors: Jung-Woo Kim, Chong-Ryul Lee, Byung-Woo Jin, Ki-Seok Park, Moo-Il Qh