Patents by Inventor Shunsuke Shima

Shunsuke Shima 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).

  • 2,6-Diaminonebularines, their production and use
    Patent number: 4341769
    Abstract: Novel N.sup.2 -substituted-2,6-diaminonebularines of the formula: ##STR1## wherein R is 2-pyridyl or 3-pyridyl, which may be substituted, or acid addition salts thereof have an excellent coronary vasodilator action.
    Type: Grant
    Filed: April 2, 1981
    Date of Patent: July 27, 1982
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Ryuji Marumoto, Shunsuke Shima, Masao Tanabe
  • Production of 2,6-diaminonebularines
    Patent number: 4255565
    Abstract: Compounds of the formula ##STR1## wherein R is a phenyl or cyclohexyl group which may be substituted by halogen, lower alkyl or lower alkoxy, or their acid addition salts, are produced in good yield by reacting a compound of the formula ##STR2## wherein R.sup.1, R.sup.2 and R.sup.3, independently of each other, are a hydroxyl group which may be proctected, which is prepared in 2 or 3 steps from 5-amino-1-.beta.-D-ribofuranosylimidazole-4-carboxamide, with a compound of the formulaR--N.dbd.C.dbd.N--R.sup.4wherein R has the same meaning as defined above and R.sup.4 is hydrogen or the same group as R, and, if necessary, subjecting the resulting compound to a treatment for removal of protective groups on its hydroxyl groups.
    Type: Grant
    Filed: October 20, 1978
    Date of Patent: March 10, 1981
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Ryuji Marumoto, Shunsuke Shima, Yoshiyasu Furukawa