Patents by Inventor Mitsuaki Ohtani

Mitsuaki Ohtani 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).

  • Publication number: 20110190351
    Abstract: Benzoimidazole Derivatives are provided. The compounds of the present invention are useful for Glycogen Synthase Kinase-3 Beta Inhibitors.
    Type: Application
    Filed: July 30, 2009
    Publication date: August 4, 2011
    Applicant: Oncotherapy Science, Inc.
    Inventors: Mitsuaki Ohtani, Yo Matsuo, Yingfu Li, Joel R. Walker, David M. Jenkins, Feryan Ahmed, Ryuji Ohsawa, Shoji Hisada
  • Patent number: 7220783
    Abstract: The present invention provides a selective suppressor of the IgE production comprising a compound which suppresses the IgE production in a process from a differentiation of a mature B cell into an antibody-producing cell to the production of an antibody and which does not suppress or weakly suppresses the production of IgG, IgM and/or IgA which are produced at the same time, a compound of the formula (I): wherein R1–R13 are hydrogen, halogen, lower alkyl, lower alkoxy or the like, X is —O—, —CH2—, —NR14— or —S(O)p- and Y is lower alkyl, lower alkenyl or the like, a process for producing the same and a pharmaceutical composition comprising the same.
    Type: Grant
    Filed: November 12, 2003
    Date of Patent: May 22, 2007
    Assignee: Shionogi & Co., Ltd.
    Inventors: Kenji Kawada, Mitsuaki Ohtani, Ryuji Suzuki, Akinori Arimura
  • Patent number: 7101915
    Abstract: The present invention provides a selective suppressor of the IgE production comprising a compound which suppresses the IgE production in a process from a differentiation of a mature B cell into an antibody-producing cell to the production of an antibody and which does not suppress or weakly suppresses the production of IgG, IgM and/or IgA which are produced at the same time, a compound of the formula (I): wherein R1–R13 are hydrogen, halogen, lower alkyl, lower alkoxy or the like, X is —O—, CH2—, —NR14— or —S(O)p— and Y is lower alkyl, lower alkenyl or the like, a process for producing the same and a pharmaceutical composition comprising the same.
    Type: Grant
    Filed: July 30, 1997
    Date of Patent: September 5, 2006
    Assignee: Shionogi & Co., Ltd.
    Inventors: Kenji Kawada, Mitsuaki Ohtani, Ryuji Suzuki, Akinori Arimura
  • Patent number: 7074836
    Abstract: The present invention provides a selective suppressor of the IgE production comprising a compound which suppresses the IgE production in a process from a differentiation of a mature B cell into an antibody-producing cell to the production of an antibody and which does not suppress or weakly suppresses the production of IgG, IgM and/or IgA which are produced at the same time, a compound of the formula (I): wherein R1–R13 are hydrogen, halogen, lower alkyl, lower alkoxy or the like, X is —O—, —CH2—, NR14— or —S(O)p— and Y is lower alkyl, lower alkenyl or the like, a process for producing the same and a pharmaceutical composition comprising the same.
    Type: Grant
    Filed: November 12, 2003
    Date of Patent: July 11, 2006
    Assignee: Shionogi & Co., Ltd.
    Inventors: Kenji Kawada, Mitsuaki Ohtani, Ryuji Suzuki, Akinori Arimura
  • Patent number: 6919375
    Abstract: Compounds having a metalloproteinase inhibitory activity, represented by the formula (I), its optically active isomers, their pharmaceutically acceptable salts, or hydrates thereof.
    Type: Grant
    Filed: July 22, 1998
    Date of Patent: July 19, 2005
    Assignee: Shionogi & Co., Ltd.
    Inventors: Fumihiko Wantanabe, Hiroshige Tsuzuki, Mitsuaki Ohtani
  • Patent number: 6881727
    Abstract: Compounds having a metalloproteinase inhibitory activity, represented by the formula (I), its optically active isomers, their pharmaceutically acceptable salts, or hydrates thereof.
    Type: Grant
    Filed: July 3, 2002
    Date of Patent: April 19, 2005
    Assignee: Shionogi & Co., Ltd.
    Inventors: Fumihiko Watanabe, Hiroshige Tsuzuki, Mitsuaki Ohtani
  • Patent number: 6838483
    Abstract: Compounds having a metalloproteinase inhibitory activity, represented by the formula (I), its optically active isomers, their pharmaceutically acceptable salts, or hydrates thereof.
    Type: Grant
    Filed: November 8, 2002
    Date of Patent: January 4, 2005
    Assignee: Shionogi & Co., Ltd.
    Inventors: Fumihiko Wantanabe, Hiroshige Tsuzuki, Mitsuaki Ohtani
  • Patent number: 6787545
    Abstract: The present invention provides a compound having sPLA2 inhibiting activity. The compound represented by the formula (I): wherein R1 is C1 to C20 alkyl, C2 to C20 alkenyl, C2 to C20 alkynyl, carbocyclic groups, heterocyclic groups or the like; R2 is a hydrogen atom or a group containing 1 to 4 non-hydrogen atoms; RA is —COCONH2 or the like; R3 is -(L2)-(acidic group) wherein L2 is a group connecting with an acid group; R4 is a hydrogen atom or the like, its prodrug, their pharmaceutically acceptable salt, or solvate thereof.
    Type: Grant
    Filed: February 20, 2002
    Date of Patent: September 7, 2004
    Assignee: Shiongi & Co., Ltd.
    Inventors: Mitsuaki Ohtani, Masahiro Fuji, Tomoyuki Ogawa
  • Publication number: 20040127495
    Abstract: The present invention provides a selective suppressor of the IgE production comprising a compound which suppresses the IgE production in a process from a differentiation of a mature B cell into an antibody-producing cell to the production of an antibody and which does not suppress or weakly suppresses the production of IgG, IgM and/or IgA which are produced at the same time, a compound of the formula (I): 1
    Type: Application
    Filed: November 12, 2003
    Publication date: July 1, 2004
    Applicant: Shionogi & Co., Ltd.
    Inventors: Kenji Kawada, Mitsuaki Ohtani, Ryuji Suzuki, Akinori Arimura
  • Patent number: 6703385
    Abstract: The present invention provides a compound having sPLA2 inhibiting activity. The compound represented by the formula (I): wherein R1 is (a) C1 to C20 alkyl, C2 to C20 alkenyl, C2 to C20 alkynyl, carbocyclic groups, heterocyclic groups or the like; R2 is COCONH2 or the like; Q1 is a nitrogen atom or C—R4; one of R3 and R4 is —(L2)-(acidic group) wherein L2 is a group connecting with an acid group and the length of the connecting groups 1 to 5 atoms, and the other is a hydrogen atom; R21 and R22 are hydrogen atoms or the like; X is —CR23R24— or the like wherein R23 and R24 are hydrogen atoms or the like; Y is —CR25R26— or the like wherein R25 and R26 are hydrogen atoms or the like; Z is CH2 or the like; a broken line ( - - - ) represents the presence or absence of a bond, its prodrug, their pharmaceutically acceptable salt, or solvate thereof.
    Type: Grant
    Filed: January 22, 2002
    Date of Patent: March 9, 2004
    Assignee: Shionogi & Co., Ltd.
    Inventors: Mitsuaki Ohtani, Masahiro Fuji, Makoto Adachi, Tomoyuki Ogawa
  • Patent number: 6673781
    Abstract: The present invention provides a compound having sPLA2 inhibiting activity. The compound represented by the formula (I): wherein R1 is (a) C1 to C20 alkyl, C2 to C20 alkenyl, C2 to C20 alkynyl, carbocyclic groups, heterocyclic groups or the like; R2 is CONH2 or CONHNH2; one of R3 and R4 is —(L2)-(acidic group) wherein L2 is a group connecting with an acid group and the length of the connecting groups 1 to 5 atoms, and the other is a hydrogen atom; its prodrug, their pharmaceutically acceptable salt, or solvate thereof.
    Type: Grant
    Filed: February 1, 2002
    Date of Patent: January 6, 2004
    Assignee: Shionogi & Co., Ltd.
    Inventors: Mitsuaki Ohtani, Masahiro Fuji, Tetsuo Okada, Makoto Adachi, Tomoyuki Ogawa
  • Publication number: 20030225043
    Abstract: Compounds having a metalloproteinase inhibitory activity, represented by the formula (I), its optically active isomers, their pharmaceutically acceptable salts, or hydrates thereof.
    Type: Application
    Filed: November 8, 2002
    Publication date: December 4, 2003
    Applicant: Shionogi & Co., Ltd.
    Inventors: Fumihiko Watanabe, Hiroshige Tsuzuki, Mitsuaki Ohtani
  • Patent number: 6645976
    Abstract: A class of novel indolizine-1-functional compounds and indolizine-3-functional compounds is disclosed together with the use of such indolizine compounds for inhibiting sPLA2 mediated release of fatty acids for treatment of conditions such as septic shock. The compounds are indolizine-1-acetamides, indolizine-1-acetic acid hydrazides, indolizine-1-glyoxylamides, indolizine-3-acetamides, indolizine-3-acetic acid hydraxides, and indolizine-3-glyoxylasides.
    Type: Grant
    Filed: April 28, 1997
    Date of Patent: November 11, 2003
    Assignees: Eli Lilly and Company, Shiongi and Company, Ltd.
    Inventors: Robert D. Dillard, Sanji Hagishita, Mitsuaki Ohtani
  • Publication number: 20030139379
    Abstract: Compounds having a metalloproteinase inhibitory activity, represented by the formula (I), its optically active isomers, their pharmaceutically acceptable salts, or hydrates thereof.
    Type: Application
    Filed: July 3, 2002
    Publication date: July 24, 2003
    Applicant: Shionogi & Co., Ltd.
    Inventors: Fumihiko Watanabe, Hiroshige Tsuzuki, Mitsuaki Ohtani
  • Patent number: 6498190
    Abstract: A compound of the formula (I): wherein for example, a compound below: wherein R1 is CH3, H or Na; and X1—X2—X3 is or its salt or a hydrate thereof is useful as PGD2 antagonist and can be used as a drug for treating diseases in which mast cell dysfunction is involved, for example, systemic mastocytosis and disorder of systemic mast cell activation, and also tracheal contraction, asthma, allergic rhinitis, allergic conjunctivitis, urticaria, injury due to ischemic reperfusion, and as an anti-inflammatory agent. It is particularly useful in the treatment of nasal occlusion.
    Type: Grant
    Filed: February 18, 2000
    Date of Patent: December 24, 2002
    Assignee: Shionogi & Co., Ltd.
    Inventors: Mitsuaki Ohtani, Akinori Arimura, Tatsuo Tsuri, Junji Kishino, Tsunetoshi Honma
  • Patent number: 6472389
    Abstract: The present invention provides a compound having sPLA2 inhibiting activity. The compound represented by the formula (I): wherein R1 is —(L1)—R6 wherein L1 is a divalent linking group of 1 to 18 atoms or the like, and R6 is a carbocyclic ring substituted by at least one non-interfering substituent or the like; R2 is C1 to C3 alkyl or the like; R3 is —(L2)-(acidic group); R4 and R5 are hydrogen atoms, non-interfering substituents, carbocyclic groups or the like; X is independently oxygen atom of sulfur atom; and RA is —C(═X)—C(═X)—NH2 or the like; the prodrugs thereof, their pharmaceutically acceptable salts, or their solvates, and a composition for inhibiting sPLA2 containing them as effective ingredients.
    Type: Grant
    Filed: October 18, 2000
    Date of Patent: October 29, 2002
    Assignee: Shionogi & Co., Ltd.
    Inventors: Mitsuaki Ohtani, Masahiro Fuji, Yoshikazu Fukui, Makoto Adachi
  • Patent number: 6441021
    Abstract: Compounds having a metalloproteinase inhibitory activity, represented by the formula (I), its optically active isomers, their pharmaceutically acceptable salts, or hydrates thereof
    Type: Grant
    Filed: November 14, 2000
    Date of Patent: August 27, 2002
    Assignee: Shionogi & Co., Ltd.
    Inventors: Fumihiko Wantanabe, Hiroshige Tsuzuki, Mitsuaki Ohtani
  • Patent number: 6407104
    Abstract: wherein R1 is —(L1)—R6 wherein L1 is a divalent linking group of 1 to 18 atoms or the like, and R6 is a carbocyclic ring substituted by at least one non-interfering substituent or the like; R2 is C1 to C3 alkyl, C3 to C4 cycloalkyl or the like group; R3 is —(L2)-(acidic group); R4 and R5 are hydrogen atoms, non-interfering substituents, carbocyclic groups or the like; RA is —C(═X)—C(═X)—NH2 or the like; and X is independently oxygen atom or sulfur atom; the prodrugs thereof, their pharmaceutically acceptable salts, or their solvates, and a composition for inhibiting sPLA2 containing them as effective ingredients.
    Type: Grant
    Filed: September 5, 2000
    Date of Patent: June 18, 2002
    Assignee: Shionogi & Co., Ltd.
    Inventors: Mitsuaki Ohtani, Masahiro Fuji, Tetsuo Okada
  • Patent number: 6384075
    Abstract: A compound of the formula (I): wherein: for example, a compound below: wherein: R1 is CH3, H or Na; and X1—X2—X3 is: or its salt or a hydrate thereof is useful as PGD2 antagonist and can be used as a drug for treating diseases in which mast cell dysfunction is involved, for example, systemic mastocytosis and disorder of systemic mast cell activation, and also tracheal contraction, asthma, allergic rhinitis, allergic conjunctivitis, urticaria, injury due to ischemic reperfusion, and as an anti-inflammatory agent. It is particularly useful in the treatment of nasal occlusion.
    Type: Grant
    Filed: February 18, 2000
    Date of Patent: May 7, 2002
    Assignee: Shionogi & Co., Ltd.
    Inventors: Mitsuaki Ohtani, Akinori Arimura, Tatsuo Tsuri, Junji Kishino, Tsunetoshi Honma
  • Patent number: 6235768
    Abstract: Compounds having a metalloproteinase inhibitory activity, represented by the formula (I), its optically active isomers, their pharmaceutically acceptable salts, or hydrates thereof.
    Type: Grant
    Filed: May 10, 1999
    Date of Patent: May 22, 2001
    Assignee: Shionogi & Co., Ltd.
    Inventors: Fumihiko Wantanabe, Hiroshige Tsuzuki, Mitsuaki Ohtani