Patents by Inventor Jyunko Sato

Jyunko Sato 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).

  • Production method for sultone derivatives
    Patent number: 8367849
    Abstract: There is provided a means to produce industrially a highly pure 2-hydroxy-4-oxa-5-thiatricyclo[4.2.1.03,7]nonane 5,5-dioxide derivative in high yield from highly pure and industrially available raw materials. The production method for a sultone derivative of the present invention comprises a step (A) to obtain a sulfonic acid derivative by hydrolyzing a sulfonyl halide derivative represented by the following chemical formula 1: or an enantiomer thereof and a step (B) to obtain a corresponding sultone derivative represented by the following chemical formula 2: or an enantiomer thereof by treating the sulfonic acid derivative with a oxidizing agent.
    Type: Grant
    Filed: September 2, 2009
    Date of Patent: February 5, 2013
    Assignee: Kuraray Co., Ltd.
    Inventors: Osamu Nakayama, Takashi Fukumoto, Jyunko Sato, Toshiki Endo, Hideki Matsuda
  • PRODUCTION METHOD FOR SULTONE DERIVATIVES
    Publication number: 20110160465
    Abstract: There is provided a means to produce industrially a highly pure 2-hydroxy-4-oxa-5-thiatricyclo[4.2.1.03,7]nonane 5,5-dioxide derivative in high yield from highly pure and industrially available raw materials. The production method for a sultone derivative of the present invention comprises a step (A) to obtain a sulfonic acid derivative by hydrolyzing a sulfonyl halide derivative represented by the following chemical formula 1: or an enantiomer thereof and a step (B) to obtain a corresponding sultone derivative represented by the following chemical formula 2: or an enantiomer thereof by treating the sulfonic acid derivative with a oxidizing agent.
    Type: Application
    Filed: September 2, 2009
    Publication date: June 30, 2011
    Applicant: KURARAY CO., LTD
    Inventors: Osamu Nakayama, Takashi Fukumoto, Jyunko Sato, Toshiki Endo, Hideki Matsuda