Patents by Inventor Moon Ho Chang

Moon Ho Chang 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: 7094913
    Abstract: The present invention relates to a synthesis of a 7-membered carbocyclic compound having diexomethylene groups, more particularly to a synthesis of a 7-membered carbocyclic compound having diexomethylene groups, a novel compound having the structure represented by the following Chemical Formula 1, from trimethylsilanylmethyl-allenol derivative by the intramolecular Prins cyclization using Lewis acid. The 7-membered carbocyclic compound is a useful intermediate for synthesis of other multicyclic compounds. In Chemical Formula 1, R1 is a C1 to C6 alkyl group, and R2 and R3 is respectively a hydrogen atom, or R1, R2 and R3 may be connected with neighboring substituents to form a 5 to 10-membered aliphatic or aromatic ring.
    Type: Grant
    Filed: April 14, 2004
    Date of Patent: August 22, 2006
    Assignee: Korea Institute of Science and Technology
    Inventors: Yong Seo Cho, Moon Ho Chang, Hun Yeong Koh, Ae Nim Pae, Hyun Jung Kang
  • Patent number: 6872840
    Abstract: The present invention relates to a synthesis of an 8-membered carbocyclic compound having diexomethylene groups, more particularly to a synthesis of an 8-membered carbocyclic compound having diexomethylene groups, a novel compound having the structure represented by the following Chemical Formula 1, from trimethylsilanylmethyl-allenol derivative by the intramolecular Prins cyclization using Lewis acid. The 8-membered carbocyclic compound is a useful intermediate for synthesis of other multicarbocyclic compounds. In Chemical Formula 1, R1 is a phenyl group, and R2 and R3 is a hydrogen atom, or R1, R2 and R3 may be connected with neighboring substituents to form a 5 to 10-membered aliphatic or aromatic ring.
    Type: Grant
    Filed: April 14, 2004
    Date of Patent: March 29, 2005
    Assignee: Korea Institute of Science And Technology
    Inventors: Yong Seo Cho, Moon Ho Chang, Hun Yeong Koh, Ae Nim Pae, Hyun Jung Kang