Patents Assigned to Yonsung Fine Chemical Co.
  • Process for preparing prostaglandin derivatives and starting materials for the same
    Publication number: 20050272943
    Abstract: The present invention provides a process for preparing benzoprostacycline derivatives of formula (1), i.e. 5,6,7-trinor-4,8-inter-m-phenylene PGI2 derivatives, and vinyl tin compounds of formula (III) as starting materials for the same.
    Type: Application
    Filed: September 18, 2003
    Publication date: December 8, 2005
    Applicant: Yonsung Fine Chemical Co., Ltd.
    Inventors: Yong-Hyun Kim, Yiu-Suk Lee
  • Process for preparing sulfamoyl-substituted phenethylamine derivatives
    Patent number: 6914159
    Abstract: The present invention relates to a novel process for preparing sulfamoyl-substituted phenethylamine derivatives, specifically, 5-{2-[2-(2-alkoxy-phenoxy)ethylamino]-propyl}-2-methoxy-benzene sulfonamide of the formula (1).
    Type: Grant
    Filed: February 7, 2002
    Date of Patent: July 5, 2005
    Assignee: Yonsung Fine Chemical Co., Ltd.
    Inventors: Won Hun Ham, Chang Young Oh, Kee Young Lee, Yong Hyun Kim, Yiu Suk Lee
  • Process for preparing prostalglandin derivatives and stereospecific starting material thereof
    Patent number: 6852880
    Abstract: The present invention relates to a process for effectively preparing prostaglandin derivatives and to a stereospecific alkyl halide containing 15S-alcohol group as a starting material.
    Type: Grant
    Filed: May 7, 2002
    Date of Patent: February 8, 2005
    Assignee: Yonsung Fine Chemical Co.
    Inventors: Won-Hun Ham, Chang-Young Oh, Kee-Young Lee, Yong-Hyun Kim, Yiu-Suk Lee