Patents by Inventor Hitoshi Ohki

Hitoshi Ohki 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: 10774087
    Abstract: Provided is a novel compound or a salt thereof inhibiting MTHFD2 and useful for treating a disease caused by overexpression of MTHFD2, a disease involved in overexpression of MTHFD2 and/or a disease associated with overexpression of MTHFD2. Solution Provided is a sulfonamide derivative having a coumarin skeleton represented by the following formula (I) and having various substituents: wherein R1, R2, R3, R4, R5, R6 and R7 are the same as defined in the specification, and a salt thereof.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: September 15, 2020
    Assignee: Daiichi Sankyo Company, Limited
    Inventors: Masahiro Ota, Hidekazu Inoue, Junya Kawai, Hitoshi Ohki, Tadashi Toki
  • Publication number: 20190284198
    Abstract: Provided is a novel compound or a salt thereof inhibiting MTHFD2 and useful for treating a disease caused by overexpression of MTHFD2, a disease involved in overexpression of MTHFD2 and/or a disease associated with overexpression of MTHFD2. Solution Provided is a sulfonamide derivative having a coumarin skeleton represented by the following formula (I) and having various substituents: wherein R1, R2, R3, R4, R5, R6 and R7 are the same as defined in the specification, and a salt thereof.
    Type: Application
    Filed: November 22, 2017
    Publication date: September 19, 2019
    Applicant: Daiichi Sankyo Company, Limited
    Inventors: Masahiro Ota, Hidekazu Inoue, Junya Kawai, Hitoshi Ohki, Tadashi Toki
  • Patent number: 8933103
    Abstract: Novel compounds or salts thereof, or crystals thereof, which inhibit Axl and are useful for treating diseases caused by Axl hyperfunction, diseases associated with Axl hyperfunction and/or diseases accompanied by Axl hyperfunction are provided. Pyridone derivatives represented by the formula (1) having various substituents or salts thereof, or crystals thereof (where R1, R2, R3, R5, R6, A, W, X and n in the formula (1) are as defined in the specification, respectively) are provided.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: January 13, 2015
    Assignee: Daiichi Sankyo Company, Limited
    Inventors: Hitoshi Ohki, Masahiro Ota, Kosuke Takeuchi, Hideaki Watanabe, Akitake Yamaguchi, Yoshihiro Shibata, Yuichi Tominaga, Takeshi Jimbo, Keijiro Kobayashi, Katsuhiro Kobayashi, Daisuke Fukatsu
  • Publication number: 20140371249
    Abstract: To provide a crystal of a tricyclic pyrazolopyrimidine compound inhibiting the effect of HSP90. The present invention provides a crystal of 2-{4-amino-2-[(3-chloro-4-methoxy-5-methylpyridin-2-yl)methyl]-2,7-dihydro-6-thia-1,2,3,5-tetraazabenzo[cd]azulen-8-yl}-N-methylacetamide which inhibits the ATPase activity of HSP90 and which has antitumor activity, a medicament comprising the same, an anticancer agent comprising the same, and the like.
    Type: Application
    Filed: August 29, 2014
    Publication date: December 18, 2014
    Applicant: Daiichi Sankyo Company, Limited
    Inventors: Yasusi Ueda, Nobuyuki Suzuki, Hitoshi Ohki
  • Patent number: 8846703
    Abstract: To provide a crystal of a tricyclic pyrazolopyrimidine compound inhibiting the effect of HSP90. The present invention provides a crystal of 2-{4-amino-2-[(3-chloro-4-methoxy-5-methylpyridin-2-yl)methyl]-2,7-dihydro-6-thia-1,2,3,5-tetraazabenzo[cd]azulen-8-yl}-N-methylacetamide which inhibits the ATPase activity of HSP90 and which has antitumor activity, a medicament comprising the same, an anticancer agent comprising the same, and the like.
    Type: Grant
    Filed: February 21, 2013
    Date of Patent: September 30, 2014
    Assignee: Daiichi Sankyo Company, Limited
    Inventors: Yasusi Ueda, Nobuyuki Suzuki, Hitoshi Ohki
  • Publication number: 20130281428
    Abstract: Novel compounds or salts thereof, or crystals thereof, which inhibit Axl and are useful for treating diseases caused by Axl hyperfunction, diseases associated with Axl hyperfunction and/or diseases accompanied by Axl hyperfunction are provided. Pyridone derivatives represented by the formula (1) having various substituents or salts thereof, or crystals thereof (where R1, R2, R3, R5, R6, A, W, X and n in the formula (1) are as defined in the specification, respectively) are provided.
    Type: Application
    Filed: January 30, 2013
    Publication date: October 24, 2013
    Inventors: Hitoshi Ohki, Masahiro Ota, Kosuke Takeuchi, Hideaki Watanabe, Akitake Yamaguchi, Yoshihiro Shibata, Yuichi Tominaga, Takeshi Jimbo, Keijiro Kobayashi, Katsuhiro Kobayashi, Daisuke Fukatsu
  • Patent number: 8556332
    Abstract: A vehicle door includes a door main body having a hollow portion, a work hole, a door hole seal that covers the work hole, a door trim, a protruding member provided so as to protrude from the door trim toward the vehicle interior side surface, and a harness routed through the door hole seal to the door trim side. The door hole seal is provided with a general surface, a bulging portion facing the protruding member and bulging from the general surface toward the inside of the hollow portion, and a harness pull-out hole through which the harness is passed. The bulging portion has an inclined surface.
    Type: Grant
    Filed: September 7, 2012
    Date of Patent: October 15, 2013
    Assignee: Honda Motor Co., Ltd
    Inventors: Atsushi Nakashima, Hitoshi Ohki
  • Patent number: 8445504
    Abstract: A pyrazolopyrimidine compound represented by formula (1) that inhibits the function of HSP90 as a chaperone protein and that has antitumor activity, a medicament comprising a compound represented by formula (1), a pharmaceutical composition comprising a compound represented by formula (1), and a method for treating cancer using a compound represented by formula (1).
    Type: Grant
    Filed: April 20, 2012
    Date of Patent: May 21, 2013
    Assignee: Daiichi Sankyo Company, Limited
    Inventors: Hitoshi Ohki, Tooru Okayama, Masahiro Ikeda, Masahiro Ota, Yoshihiro Shibata, Toshiyuki Nakanishi, Yasusi Ueda, Nobuyuki Suzuki, Shinji Matuura
  • Publication number: 20130076060
    Abstract: A vehicle door includes a door main body having a hollow portion, a work hole, a door hole seal that covers the work hole, a door trim, a protruding member provided so as to protrude from the door trim toward the vehicle interior side surface, and a harness routed through the door hole seal to the door trim side. The door hole seal is provided with a general surface, a bulging portion facing the protruding member and bulging from the general surface toward the inside of the hollow portion, and a harness pull-out hole through which the harness is passed. The bulging portion has an inclined surface.
    Type: Application
    Filed: September 7, 2012
    Publication date: March 28, 2013
    Applicant: HONDA MOTOR CO., LTD
    Inventors: Atsushi Nakashima, Hitoshi Ohki
  • Publication number: 20120202833
    Abstract: A pyrazolopyrimidine compound represented by formula (1) that inhibits the function of HSP90 as a chaperone protein and that has antitumor activity, a medicament comprising a compound represented by formula (1), a pharmaceutical composition comprising a compound represented by formula (1), and a method for treating cancer using a compound represented by formula (1).
    Type: Application
    Filed: April 20, 2012
    Publication date: August 9, 2012
    Applicant: DAIICHI SANKYO COMPANY, LIMITED
    Inventors: Hitoshi Ohki, Tooru Okayama, Masahiro Ikeda, Masahiro Ota, Yoshihiro Shibata, Toshiyuki Nakanishi, Yasusi Ueda, Nobuyuki Suzuki, Shinji Matuura
  • Patent number: 8236813
    Abstract: A pyrazolopyrimidine compound represented by formula (1) that inhibits the function of HSP90 as a chaperone protein and that has antitumor activity, a medicament comprising a compound represented by formula (1), a pharmaceutical composition comprising a compound represented by formula (1), and a method for treating cancer using a compound represented by formula (1).
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: August 7, 2012
    Assignee: Daiichi Sankyo Company, Limited
    Inventors: Hitoshi Ohki, Tooru Okayama, Masahiro Ikeda, Masahiro Ota, Yoshihiro Shibata, Toshiyuki Nakanishi, Yasusi Ueda, Nobuyuki Suzuki, Shinji Matuura
  • Publication number: 20110071170
    Abstract: A pyrazolopyrimidine compound represented by formula (1) that inhibits the function of HSP90 as a chaperone protein and that has antitumor activity, a medicament comprising a compound represented by formula (1), a pharmaceutical composition comprising a compound represented by formula (1), and a method for treating cancer using a compound represented by formula (1).
    Type: Application
    Filed: October 29, 2010
    Publication date: March 24, 2011
    Applicant: DAIICHI SANKYO COMPANY, LIMITED
    Inventors: Hitoshi Ohki, Tooru Okayama, Masahiro Ikeda, Masahiro Ota, Yoshihiro Shibata, Toshiyuki Nakanishi, Yasusi Ueda, Nobuyuki Suzuki, Shinji Matuura
  • Publication number: 20070191356
    Abstract: A quinolone antimicrobial agent having potent antimicrobial activity against gram positive and gram negative bacteria and having high safety is provided. A compound represented by the following formula (1): [Chemical formula 1] [wherein, R1: hydrogen, alkyl, cycloalkyl, or substituted carbonyl derived from amino acid, peptide or tripeptide; R2: hydrogen, alkyl, or cycloalkyl; R3: hydrogen, amino, halogen, or alkyl; R4: hydrogen, phenyl, acetoxymethyl, pivaloyloxymethyl, ethoxycarbonyl, choline, dimethylaminoethyl, 5-indanyl, phthalidinyl, 5-alkyl-2-oxo-1,3-dioxol-4-ylmethyl, 3-acetoxy-2-oxobutyl, alkyl, alkoxymethyl, or phenylalkyl; X, X1, X2: hydrogen or halogen] or salt thereof, or a hydrate thereof; and antimicrobial agent and therapeutic agent for infections, each containing the compound, salt thereof or a hydrate thereof.
    Type: Application
    Filed: February 1, 2005
    Publication date: August 16, 2007
    Inventors: Makoto Takemura, Hitoshi Ohki
  • Patent number: 6656952
    Abstract: An antibacterial drug having potent antibacterial activities upon various bacteria including resistant strains and high safety is disclosed, which comprises as an active ingredient, quinolone derivatives represented by the following formula (I), its salts or hydrates thereof: wherein R1 represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, R2 represents a halogenomethoxyl group or an alkoxyl group, R3 represents an alkyl group, an alkenyl group, a halogenoalkyl group, a cyclic alkyl group, a heteroaryl group, an alkoxyl group or an alkylamino group, and R4 represents a hydrogen atom, a phenyl group, an acetoxymethyl group, a pivaloyloxymethyl group, an ethoxycarbonyl group, a choline group, a dimethylaminoethyl group, a 5-indanyl group, a phthalidinyl group, a 5-alkyl-2-oxo-1,3-dioxol-4-ylmethyl group, 3-acetoxy-2-oxobutyl group, an alkyl group, an alkoxylmethyl group or a phenylalkyl group. These substituents may further have additional substituents.
    Type: Grant
    Filed: December 23, 1999
    Date of Patent: December 2, 2003
    Assignee: Daiichi Pharmaceutical Co., Ltd.
    Inventors: Makoto Takemura, Hisashi Takahashi, Hitoshi Ohki, Kenichi Kimura, Rie Miyauchi, Toshiyuki Takeda
  • Patent number: 6586604
    Abstract: The present invention relates to a compound having a tricyclic amine substituent which may have various substituents, the compound being represented by formula (I), a salt or hydrate thereof, and a hydrate of the salt and a drug containing them as an active ingredient. They exhibit excellent antimicrobial activity against Gram negative bacteria and Gram positive bacteria with a satisfactory fate and safety and are useful in the treatment of infectious diseases.
    Type: Grant
    Filed: June 8, 2001
    Date of Patent: July 1, 2003
    Assignee: Daiichi Pharmaceutical Co., Ltd.
    Inventors: Makoto Takemura, Hisashi Takahashi, Kenichi Kimura, Rie Miyauchi, Hitoshi Ohki, Katsuhiro Kawakami
  • Patent number: 6573377
    Abstract: This invention provides compounds having antitumor effect, namely a compound represented by the following formula (I) or (Ia) having various substituents in which G and G1 are condensed tricyclic heterocyclic rings or salts thereof, and a compound represented by the following formula (Ib) having various substituents or salts thereof.
    Type: Grant
    Filed: January 24, 2001
    Date of Patent: June 3, 2003
    Assignee: Daiichi Pharmaceuticals Co., Ltd.
    Inventors: Akio Ejima, Satoru Ohsuki, Hitoshi Ohki, Hiroyuki Naito, Chie Makino
  • Patent number: 6552018
    Abstract: The present invention relates to cis- and trans-forms of pyrazole derivatives, salts thereof, or agents containing the same, and represented by the general formula (I): wherein G represents a nitrogen containing saturated heterocyclic structure represented by the following formula: These compounds exhibit anti-tumor activity on 5-FU-resistant tumors and effects on P glycoprotein expressing, multiple-drug resistant tumors. An example of a pyrazole derivative which demonstrates 50% inhibition of tumor cell growth is 3-[4-(3-chloro-5-fluorophenyl)-1piperazinyl]-1-[1-(3-chloro-2-pyridyl)-5-methyl-4-pyrazolyl)-1-trans-propene hydrochloride. Synthesis of the compounds represented by formula (I) can be prepared by any one of various routes such as a Mannich reaction, a Wittig reaction, reductive amination or substitution by allylation.
    Type: Grant
    Filed: October 17, 2000
    Date of Patent: April 22, 2003
    Assignee: Daiichi Pharmaceutical Co., Ltd.
    Inventors: Akio Ejima, Satoru Ohsuki, Hitoshi Ohki, Hiroyuki Naito
  • Patent number: 6469023
    Abstract: The present invention provides an antibacterial compound useful as medicines, animal drugs, fisheries drugs or antibacterial preservatives and to an antibacterial agent or preparation which contains the same, more particularly a compound which possesses high safety and excellent activity against a broad range of bacterial species including quinolone-resistant strains. A quinolone derivative of the following formula (I) which has a group derived from the heterocyclic spiro-compound at the 7-positioned R2 and the halogenocyclopropyl group at the N1-position, prefereably a compound of pure isomer, and an antibacterial agent containing the derivative compound.
    Type: Grant
    Filed: August 7, 1997
    Date of Patent: October 22, 2002
    Assignee: Daiichi Pharmaceutical Co., Ltd.
    Inventors: Makoto Takemura, Youichi Kimura, Hitoshi Ohki
  • Publication number: 20020077345
    Abstract: Antimicrobial agents being excellent in antimicrobial activity and safety.
    Type: Application
    Filed: November 2, 2001
    Publication date: June 20, 2002
    Applicant: DAIICHI PHARMACEUTICAL CO., LTD.
    Inventors: Makoto Takemura, Hisashi Takahashi, Kazuyuki Sugita, Hitoshi Ohki, Satoru Miyauchi, Rie Miyauchi
  • Publication number: 20020072608
    Abstract: An antibacterial drug having potent antibacterial activities upon various bacteria including resistant strains and high safety is disclosed, which comprises as an active ingredient, quinolone derivatives represented by the following formula (I), its salts or hydrates thereof: 1
    Type: Application
    Filed: December 23, 1999
    Publication date: June 13, 2002
    Inventors: MAKOTO TAKEMURA, HISASHI TAKAHASHI, HITOSHI OHKI, KENICHI KIMURA, RIE MIYAUCHI, TOSHIYUKI TAKEDA