Patents by Inventor Koichi Otani

Koichi Otani 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).

  • Patent number: 4564623
    Abstract: An aminoalkylbenzene derivative of the formula: ##STR1## [wherein A is oxygen or sulfur;Y is oxo, thioxo, or cyanoimino;a is an integer of 1 to 3;b is an integer of 0 to 3;c is an integer of 1 to 4;R.sup.1 is alkyl;R.sup.2 is hydrogen or alkyl; orR.sup.1 and R.sup.2 taken together represent pyrrolidinyl;R is hydrogen, cycloaklkyl, trihaloalkyl, alkoxy, dialkylamino, aryl, aroyl, heterocyclic group, or a group of the formula: ##STR2## (wherein R.sup.3 is hydrogen, halogen, amino, alkyl, alkylamino, dialkylamino, alkylthio, or aryloxy;R.sup.4 is hydrogen, alkyl, alkenyl, aryl, or heterocyclic group; orR.sup.3 and R.sup.4 taken together represent alkylidene or aralkylidene);with the proviso that the above aryl, aroyl, and heterocyclic group can be substituted by 1 to 3 substituents] and its pharmaceutically acceptable acid addition salts being useful as histamine H.sub.2 blockers, especially peptic ulcer remedies, are provided via several routes.
    Type: Grant
    Filed: January 25, 1984
    Date of Patent: January 14, 1986
    Assignee: Shionogi & Co., Ltd.
    Inventors: Kentaro Hirai, Teruyuki Ishiba, Shigeru Matsutani, Itsuo Makino, Toshio Fujishita, Masami Doteuchi, Koichi Otani
  • Patent number: 4482566
    Abstract: An aminoalkylbenzene derivative of the formula: ##STR1## [wherein A is oxygen or sulfur;Y is oxo, thioxo, or cyanoimino;a is an integer of 1 to 3;b is an integer of 0 to 3;c is an integer of 1 to 4;R.sup.1 is alkyl;R.sup.2 is hydrogen or alkyl; orR.sup.1 and R.sup.2 taken together represent pyrrolidinyl;R is hydrogen, cycloalkyl, trihaloalkyl, alkoxy, dialkylamino, aryl, aroyl, heterocyclic group, or a group of the formula: ##STR2## (wherein R.sup.3 is hydrogen, halogen, amino, alkyl, alkylamino, dialkylamino, alkylthio, or aryloxy;R.sup.4 is hydrogen, alkyl, alkenyl, aryl, or heterocyclic group; orR.sup.3 and R.sup.4 taken together represent alkylidene or aralkylidene);with the proviso that the above aryl, aroyl, and heterocyclic group can be substituted by 1 to 3 substituents] and its pharmaceutically acceptable acid addition salts being useful as histamine H.sub.2 blockers, especially peptic ulcer remedies, are provided via several routes.
    Type: Grant
    Filed: June 25, 1981
    Date of Patent: November 13, 1984
    Assignee: Teikoku Hormone Mfg. Co., Ltd.
    Inventors: Kentaro Hirai, Teruyuki Ishiba, Shigeru Matsutani, Itsuo Makino, Toshio Fujishita, Masami Doeteuchi, Koichi Otani
  • Patent number: 4318858
    Abstract: A compound of the formula: ##STR1## [wherein R is dimethylamino or 1-pyrrolidinyl;R.sup.1 and R.sup.2 each is hydrogen or C.sub.1 -C.sub.3 alkyl;R.sup.3 is hydrogen, C.sub.1 -C.sub.3 alkyl (optionally substituted by one member selected from the group consisting of cyano, C.sub.1 -C.sub.3 alkoxy, phenyl, and 5- or 6-membered heterocyclic group), C.sub.3 -C.sub.6 cycloalkyl, C.sub.2 -C.sub.5 alkenyl (optionally substituted by one member selected from the group consisting of C.sub.1 -C.sub.3 alkoxy, phenyl, and phenoxy), C.sub.6 -C.sub.10 aryl (optionally substituted by one or two members selected from the group consisting of hydroxy, halogen, nitro, sulfamoyl, C.sub.1 -C.sub.3 alkyl, C.sub.1 -C.sub.3 alkoxy, C.sub.1 -C.sub.3 alkanoyl, C.sub.2 -C.sub.4 alkoxycarbonyl, C.sub.2 -C.sub.4 dialkylamino, and C.sub.1 -C.sub.3 alkanesulfonyl), or 5- or 6-membered heterocyclic group (optionally substituted by one member selected from the group consisting of oxo, halogen, C.sub.1 -C.sub.3 alkyl, and C.sub.1 -C.sub.
    Type: Grant
    Filed: December 2, 1980
    Date of Patent: March 9, 1982
    Assignee: Shionogi & Co., Ltd.
    Inventors: Kentaro Hirai, Shigeru Matsutani, Teruyuki Ishiba, Itsuo Makino, Masami Doteuchi, Koichi Otani
  • Patent number: 4309433
    Abstract: An aminoalkylbenzene derivative of the formula: ##STR1## [wherein A is oxygen or sulfur;Y is oxo, thioxo, or cyanoimino;a is an integer of 1 to 3;b is an integer of 0 to 3;c is an integer of 1 to 4;R.sup.1 is alkyl;R.sup.2 is hydrogen or alkyl; orR.sup.1 and R.sup.2 taken together represent pyrrolidinyl;R is hydrogen, cycloalkyl, trihaloalkyl, alkoxy, dialkylamino, aryl, aroyl, heterocyclic group, or a group of the formula: ##STR2## (wherein R.sup.3 is hydrogen, halogen, amino, alkyl, alkylamino, dialkylamino, alkylthio, or aryloxy;R.sup.4 is hydrogen, alkyl, alkenyl, aryl, or heterocyclic group; orR.sup.3 and R.sup.4 taken together represent alkylidene or aralkylidene;with the proviso that the above aryl, aroyl, and heterocyclic group can be substituted by 1 to 3 substituents] and its pharmaceutically acceptable acid addition salts being useful as histamine H.sub.2 blockers, especially peptic ulcer remedies, are provided via several routes.
    Type: Grant
    Filed: June 30, 1980
    Date of Patent: January 5, 1982
    Assignee: Shionogi & Co., Ltd.
    Inventors: Kentaro Hirai, Teruyuki Ishiba, Shigeru Matsutani, Itsuo Makino, Toshio Fujishita, Masami Doteuchi, Koichi Otani