Patents by Inventor Tadayuki Kuraishi

Tadayuki Kuraishi 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).

  • Thiazinobenzimidazole derivatives
    Patent number: 4369309
    Abstract: The specification describes novel thiazinobenzmidazole derivatives represented by the general formula: ##STR1## wherein R.sub.1, R.sub.2 and X represent a wide variety of substituent groups respectively. The above thiazinobenzimidazole derivatives may be prepared by reacting corresponding 2-hydroxymethyl thiazinobenzimidazole derivatives with corresponding reactive derivatives of carbonylic acid or halogenide or by reacting 2-p-toluenesulfonyloxymethyl-thiazinobenzimidazole derivatives with sodium azides, thiols, phenols or amines. The above thiazinobenzimidazole derivatives wherein X in OH may be prepared by reducing their corresponding 2-alkoxycarbonyl derivatives. Where X represents a p-toluenesulfonyloxy group, the thiazinobenzimidazole derivatives may be obtained by reacting corresponding 2-hydroxymethyl-thiazinobenzimidazole derivatives with p-toluenesulfonyl chloride.
    Type: Grant
    Filed: March 3, 1981
    Date of Patent: January 18, 1983
    Assignee: SS Pharmaceutical Co., Ltd.
    Inventors: Hiromichi Eto, Teruo Kohmoto, Tadayuki Kouda, Youichiro Ogawa, Susumu Sato, Tadayuki Kuraishi, Toshiaki Nakashima