Patents by Inventor Akiyoshi Yoda

Akiyoshi Yoda 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 1,5-benzothiazepine derivative
    Patent number: 5169946
    Abstract: A process for preparing hydrochloride of 3-acetoxy-2,3-dihydro-5-[2-(dimethylamino)ethyl]-2-(p-methoxyphenyl)-1,5-b enzothiazepin-4(5H)-one which comprises reacting 3-hydroxy-2,3-dihydro-5-[2-(dimethylamino)ethyl]-2-(p-methoxyphenyl)-1,5-b enzothiazepin-4(5H)-one which acetyl chloride in acetic acid or a mixed solvent of acetic acid and acetic anhydride. According to the process, hydrochloride of 3-acetoxy-2,3-dihydro-5-[2-(dimethylamino)ethyl]-2-(p-methoxyphenyl)-1,5-b enzothiazepin-4(5H)-one is readily obtained in one step.
    Type: Grant
    Filed: November 27, 1991
    Date of Patent: December 8, 1992
    Assignee: Tanabe Seiyaku Co., Ltd.
    Inventors: Masanori Yoshioka, Mitsuyoshi Wagatsuma, Akiyoshi Yoda, Yoshihisa Yamada, Gunji Yoshimura