Patents by Inventor Yoshihiko Yosohara

Yoshihiko Yosohara 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).

  • Process for preparing optically active 2-[6-(hydroxy-methyl)-1,3-dioxan-4-yl] acetic acid derivatives
    Publication number: 20060246557
    Abstract: The present invention is to provide a production technology by which an optically active 2-[6-(hydroxymethyl)-1,3-dioxan-4-yl]acetic acid derivative, which are of value as pharmaceutical intermediates, can be produced from inexpensive and readily available starting materials without using any extraordinary equipment such as an ultra-low-temperature reactor. The present invention is a production process of an optically active 2-[6-(hydroxymethyl)-1,3-dioxan-4-yl]acetic acid derivative which comprises reacting an enolate, prepared by permitting a base or a 0-valent metal to act on an acetic acid ester derivative with (S)-?-hydroxy-?-butyrolactone at a temperature not lower than ?30° C.
    Type: Application
    Filed: June 30, 2006
    Publication date: November 2, 2006
    Applicant: Kaneka Corporation
    Inventors: Akira Nishiyama, Miho Horikawa, Yoshihiko Yosohara, Noboru Ueyama, Kenji Inoue