Patents by Inventor Kenji Hoshina

Kenji Hoshina 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).

  • Pyrrolo[2,3-d]pyrimidine derivatives, process for producing the same and pharmaceutical preparation comprising the same as active ingredient
    Patent number: 5661148
    Abstract: A pyrrolo[2,3-d]pyrimidine derivative having the general formula [I] ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, Y and Z have the same definitions as those given in the description, a pharmaceutically acceptable acid addition salt thereof, and a pharmaceutical preparation comprising the same, are provided.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: August 26, 1997
    Assignee: Teijin Limited
    Inventors: Yasuji Sakuma, Masaichi Hasegawa, Kenichiro Kataoka, Kenji Hoshina, Noboru Yamazaki, Takashi Kadota, Hisao Yamaguchi
  • Fused pyrimidine derivative, process for preparation of same and pharmaceutical preparation comprising same as active ingredient
    Patent number: 5378700
    Abstract: Disclosed is a fused pyrimidine of the formula [I] ##STR1## wherein R.sup.1, R.sup.2, and R.sup.
    Type: Grant
    Filed: June 9, 1992
    Date of Patent: January 3, 1995
    Assignee: Teijin Limited
    Inventors: Yasuji Sakuma, Masaichi Hasegawa, Kenichiro Kataoka, Kenji Hoshina, Noboru Yamazaki, Takashi Kadota, Hisao Yamaguchi
  • Aminocarboxylic acids, amino alcohols, or the derivatives thereof, processes for production thereof, and pharmaceutical uses thereof
    Patent number: 4402975
    Abstract: A compound represented by the following formula ##STR1## wherein R.sup.1 represents a hydrogen atom, an acyl group or an alkoxycarbonyl group; X.sup.1 represents an alkylene group having 3 to 6 carbon atoms, a 1,4-cyclohexylene group, or a 1,4-phenylene group, the alkylene group may be substituted by an alkyl group having 1 to 6 carbon atoms, and the 1,4-phenylene group may be substituted by 1 or 2 substituents selected from halogen atoms and alkoxy groups having 1 to 6 carbon atoms; R.sup.2 represents a hydrogen atom or a hydroxyl group and R.sup.3 represents hydrogen atom, or R.sup.2 and R.sup.3 together may form an oxo group (.dbd.O), and when X.sup.1 is other than the 1,4-phenylene group, R.sup.2 represents a hydrogen atom and R.sup.3 represents a bond between the carbon atoms to which R.sup.3 is bonded and that carbon atom of X.sup.1 which is adjacent to said carbon atom; X.sup.
    Type: Grant
    Filed: July 17, 1981
    Date of Patent: September 6, 1983
    Assignee: Teijin Limited
    Inventors: Toru Takeshita, Kenji Hoshina, Akira Ohtsu, Tatsuyuki Naruchi
  • Derivative of thiazolo[3,2-a]pyrimidine and a process for the preparation thereof and a drug containing it
    Patent number: 4383996
    Abstract: A derivative of thiazolo [3,2-a] pyrimidine expressed by formula (I) ##STR1## (where R indicates a phenyl group or a benzyl group which has a halogen atom, a lower alkyl or lower alkyloxy group as a substituent group, an alicyclic group or an arylethyl group), and a process for the preparation of a compound of formula (I) comprising cyclizing a compound expressed by formula (II) by application of heat ##STR2## (where a definition of R is as same as that given in case of formula (I) and R' indicates a halogen atom or lower alkyloxy group). A drug which contains this compound as active ingredient is useful for curing autoimmune diseases such as rheumatoid arthritis, nephritis, etc.
    Type: Grant
    Filed: December 28, 1981
    Date of Patent: May 17, 1983
    Assignee: Teijin Limited
    Inventors: Takeo Oba, Kiyoshi Bannai, Toshio Tanaka, Kenzo Watanabe, Tatsuyuki Naruchi, Keiji Komoriya, Seizi Kurozumi, Kenji Hoshina