Patents by Inventor Joo Cha

Joo Cha 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).

  • Bycyclic tetrahydrofuran derivatives and process for the preparation thereof
    Publication number: 20070010576
    Abstract: The present invention relates to bicyclic tetrahydrofuran derivatives of Formula (1) and a preparation method thereof, and particularly it relates to a process of preparing compounds of Formula (1) by performing an intramolecular cyclization of tetrahydrofuran-allenol derivatives in the presence of alcohol compound, transitional metal catalyst and carbon monoxide: wherein n is 1 or 2; R is phenyl optionally substituted with C1-C6 alkyl, C1-C6 alkoxy, hydroxyl or C1-C6 hydroxyalkyl group; and R1 is C1-C6 alkyl group.
    Type: Application
    Filed: December 15, 2005
    Publication date: January 11, 2007
    Inventors: Yong Cho, Ae Pae, Joo Cha, Hun Koh, Chul Shin
  • Bicyclic tetrahydrofuran lactone derivatives and process for the preparation thereof
    Publication number: 20070010679
    Abstract: The present invention relates to bicyclic tetrahydrofuran lactone derivatives of Formula (1) and a preparation method thereof, and particularly it relates to a process of preparing compounds of Formula (1) by performing an intramolecular cyclization of tetrahydrofuran-allenic acid derivatives in the presence of a phenyl halide, a palladium catalyst and a base: wherein n is 1 or 2, and R is phenyl optionally substituted with C1-C6 alkyl, C1-C6 alkoxy, hydroxyl or C1-C6 hydroxyalkyl group.
    Type: Application
    Filed: December 15, 2005
    Publication date: January 11, 2007
    Inventors: Yong Cho, Joo Cha, Ae Pae, Hun Koh, Chul Shin