Patents by Inventor Masateru Ohta

Masateru Ohta 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: 9487517
    Abstract: The present invention relates to a compound represented by the following formula (1): wherein W, X, Y, R1, R2, R33, R34, m and n are as defined in the claims, or a pharmacologically acceptable salt thereof.
    Type: Grant
    Filed: September 17, 2015
    Date of Patent: November 8, 2016
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Toru Esaki, Yoshikazu Nishimura, Yoshiaki Isshiki, Naoki Okamoto, Yoshiyuki Furuta, Akemi Mizutani, Masateru Ohta, Wayne Wen Lai, Tomoya Kotake
  • Publication number: 20160016956
    Abstract: The present invention relates to a compound represented by the following formula (1): wherein W, X, Y, R1, R2, R33, R34, m and n are as defined in the claims, or a pharmacologically acceptable salt thereof.
    Type: Application
    Filed: September 17, 2015
    Publication date: January 21, 2016
    Applicant: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Toru Esaki, Yoshikazu NISHIMURA, Yoshiaki ISSHIKI, Naoki OKAMOTO, Yoshiyuki FURUTA, Akemi MIZUTANI, Masateru OHTA, Wayne Wen LAI, Tomoya KOTAKE
  • Patent number: 9169254
    Abstract: The present invention relates to a compound represented by the following formula (1): wherein W, X, Y, R1, R2, R33, R34, m and n are as defined in the claims, or a pharmacologically acceptable salt thereof.
    Type: Grant
    Filed: April 27, 2010
    Date of Patent: October 27, 2015
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Toru Esaki, Yoshikazu Nishimura, Yoshiaki Isshiki, Naoki Okamoto, Yoshiyuki Furuta, Akemi Mizutani, Masateru Ohta, Wayne Wen Lai, Tomoya Kotake
  • Patent number: 8470829
    Abstract: An imidazole derivative represented by formula (I): wherein Q is: A is hydrogen, halogen, or a substituted or unsubstituted C1-4 alkyl group; E is independently selected from a C1-6 alkyl group; R2 and R3 are independently selected from C1-6 alkyls; X1 and X2 are independently selected from O and S; Y is selected from a substituted or unsubstituted arylene group and a substituted or unsubstituted divalent 5- or 6-membered monocyclic or 8- to 10-membered condensed heterocyclic group; Z is —CON(—Ra)—, —CO—, —OOO—, —NRa—C(?NH)NRb—, —NRa—C(?N—CN)NRb—, —N(—Ra)COO—, —C(?NH)—, —SO2—, —SO2N(—Ra)—, —SO2NR1—, —N(—Ra)CO—, —N(—Ra)CON(—Rb)—, —N(COR1)CO—, —N(—Ra)SO2—, —N(SO2R1)SO2—, —N(—Ra)— or —N(—Ra)SO2N(—Rb)—; R1 is independently a hydrogen atom, a hydroxyl group, or substituted or unsubstituted group selected from C1-6 alkyl group, heterocyclic group, aryl group, C3-8 cycloalkyl group and C3-8 cycloalkenyl group; or salt or prodrug thereof.
    Type: Grant
    Filed: September 9, 2005
    Date of Patent: June 25, 2013
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Kazutaka Tachibana, Haruhiko Sato, Masateru Ohta, Mitsuaki Nakamura, Takuya Shiraishi, Hitoshi Yoshino, Takashi Emura, Akie Honma, Etsuro Onuma, Hiromitsu Kawata, Kenji Taniguchi
  • Publication number: 20120270838
    Abstract: The present invention relates to a compound represented by the following formula (1): wherein W, X, Y, R1, R2, R33, R34, m and n are as defined in the claims, or a pharmacologically acceptable salt thereof.
    Type: Application
    Filed: April 27, 2010
    Publication date: October 25, 2012
    Applicant: CHUGAI SEIYAKU KABUSHIKI KAISHA
    Inventors: Toru Esaki, Yoshikazu Nishimura, Yoshiaki Isshiki, Naoki Okamoto, Yoshiyuki Furuta, Akemi Mizutani, Masateru Ohta, Wayne Wen Lai, Tomoya Kotake
  • Publication number: 20110306615
    Abstract: According to the present invention, a compound represented by formula (I): wherein Q is: A is a hydrogen atom, a halogen atom, —ORa or a C1-4 alkyl group which may be substituted by one or more halogen atoms; E is independently selected from a C1-6 alkyl group; m is selected from integers from 0 to 3; R2 and R3 are independently selected from a C1-6 alkyl group; X1 and X2 are independently selected from O and S; Y is selected from an arylene group and a divalent 5- or 6-membered monocyclic or 8- to 10-membered condensed heterocyclic group, wherein the arylene group and the heterocyclic group may be substituted by 1 to 3 substituents independently selected from E1; E1 is independently selected from a hydroxyl group, a halogen atom, a C1-4 alkyl group, a cyano group, a C1-4 alkoky group, a carbamoyl group, a C1-4 alkylcarbamoyl group, a di(C1-4 alkyl)carbamoyl group, an amino group, a C1-4 alkylamino group, a di(C1-4 alkylamino group, a sulfamoyl group, a C1-4 alkylsulfamoyl group and a di(C1-4 alkyl)su
    Type: Application
    Filed: September 9, 2005
    Publication date: December 15, 2011
    Applicant: CHUGAI SEIYAKU KABUSHIKI KAISHA
    Inventors: Kazutaka Tachibana, Haruhiko Sato, Masateru Ohta, Mitsuaki Nakamura, Takuya Shiraishi, Hitoshi Yoshino, Takashi Emura, Akie Honma, Etsuro Onuma, Hiromitsu Kawata, Kenji Taniguchi
  • Patent number: 7879887
    Abstract: The present invention provides novel ?-amino acid derivatives of formula (1): (wherein, R1, R2, R3, R4, X and Y are as defined in the claims) or pharmaceutically acceptable salts, prodrugs or solvates thereof. The derivatives of formula (1) have ?ARK1 inhibitory activity and are useful for preventing or treating heart failure. Moreover, the derivatives of formula (1) also have antitumor activity, particularly dual inhibitory activity on Aurora kinase and CDK, and are useful for cell proliferative diseases such as cancer.
    Type: Grant
    Filed: June 29, 2007
    Date of Patent: February 1, 2011
    Assignees: Nissan Chemical Industries, Ltd., Chugai Seiyaku Kabushiki Kaisha
    Inventors: Kazuhiko Ohrai, Michiaki Adachi, Koji Toyama, Takanori Shimizu, Keishi Hayashi, Masataka Minami, Yoshiyuki Suzuki, Masakazu Sugiyama, Masateru Ohta, Shojiro Kadono, Takuya Shiraishi, Haruhiko Sato, Yoshiaki Watanabe, Nobuya Ishii, Masahiro Sakaitani, Masami Hasegawa
  • Patent number: 7803826
    Abstract: The present invention provides a compound represented by formula (I): wherein n is an integer selected from 1 to 20, Q is A is cyano or the like; B is hydrogen, halogen, or the like; X1 and X2 are each independently selected from O and S; E is a C1-4 alkyl group; and R1, R2, R3 and R4 are each independently selected from a hydrogen atom and a C1-C6 alkyl group, and a drug, a pharmaceutical composition containing the compound, and the like.
    Type: Grant
    Filed: August 3, 2005
    Date of Patent: September 28, 2010
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Kazutaka Tachibana, Haruhiko Sato, Masateru Ohta, Mitsuaki Nakamura, Takuya Shiraishi, Ikuhiro Imaoka, Hitoshi Yoshino, Masahiro Nagamuta, Hiromitsu Kawata
  • Publication number: 20090275623
    Abstract: The present invention provides novel ?-amino acid derivatives of formula (1): (wherein, R1, R2, R3, R4, X and Y are as defined in the claims) or pharmaceutically acceptable salts, prodrugs or solvates thereof. The derivatives of formula (1) have ?ARK1 inhibitory activity and are useful for preventing or treating heart failure. Moreover, the derivatives of formula (1) also have antitumor activity, particularly dual inhibitory activity on Aurora kinase and CDK, and are useful for cell proliferative diseases such as cancer.
    Type: Application
    Filed: June 29, 2007
    Publication date: November 5, 2009
    Inventors: Kazuhiko Ohrai, Michiaki Adachi, Koji Toyama, Takanori Shimizu, Keishi Hayashi, Masataka Minami, Yoshiyuki Suzuki, Masakazu Sugiyama, Masateru Ohta, Shojiro Kadono, Takuya Shiraishi, Haruhiko Sato, Yoshiaki Watanabe, Nobuya Ishii, Masahiro Sakaitani, Masami Hasegawa
  • Publication number: 20070249697
    Abstract: The present invention provides a compound represented by formula (I): wherein n is an integer selected from 1 to 20, Q is A is cyano or the like; B is hydrogen, halogen, or the like; X1 and X2 are each independently selected from O and S; E is a C1-4 alkyl group; and R1, R2, R3 and R4 are each independently selected from a hydrogen atom and a C1-C6 alkyl group, and a drug, a pharmaceutical composition containing the compound, and the like.
    Type: Application
    Filed: August 3, 2005
    Publication date: October 25, 2007
    Inventors: Kazutaka Tachibana, Haruhiko Sato, Masateru Ohta, Mitsuaki Nakamura, Takuya Shiraishi, Ikuhiro Imaoka, Hitoshi Yoshino, Masahiro Nagamuta, Hiromitsu Kawata
  • Patent number: 7271188
    Abstract: The present invention provides a compound represented by formula (I): [Formula 1] wherein n is an integer selected from 1 to 20, and R1 and R2, which may be the same or different, each represent a hydrogen atom, or a linear or branched C1-C6 alkyl group, or a salt, a prodrug or a solvate thereof, as well as a drug, a pharmaceutical composition containing the compound, and the like.
    Type: Grant
    Filed: June 11, 2004
    Date of Patent: September 18, 2007
    Assignee: Chugai Seikayu Kabushiki Kaisha
    Inventors: Kazutaka Tachibana, Haruhiko Sato, Masateru Ohta, Mitsuaki Nakamura, Takuya Shiraishi, Ikuhiro Imaoka, Hitoshi Yoshino, Masahiro Nagamuta, Hiromitsu Kawata
  • Publication number: 20060135583
    Abstract: The present invention provides a compound represented by formula (I): wherein n is an integer selected from 1 to 20, and R1 and R2, which may be the same or different, each represent a hydrogen atom, or a linear or branched C1-C6 alkyl group, or a salt, a prodrug or a solvate thereof, as well as a drug, a pharmaceutical composition containing the compound, and the like.
    Type: Application
    Filed: June 11, 2004
    Publication date: June 22, 2006
    Applicant: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Kazutaka Tachibana, Haruhiko Sato, Masateru Ohta, Mitsuaki Nakamura, Takuya Shiraishi, Ikuhiro Imaoka, Hitoshi Yoshino, Masahiro Nagamuta, Hiromitsu Kawata
  • Patent number: 7018993
    Abstract: A compound pf general formula (I): wherein, for example, X1 and X2 independently represent a hydrogen atom. Ra represents a hydrogen atom or a protecting group for a hydroxyl group. Rb and Rc form an optionally protected —(C?O)— together with the 3-position carbon atom attached to Rb and Rc, and the broken line forms a single bond or double bond together with the solid line, or a pharmaceutically acceptable salt of the compound or a prodrug thereof.
    Type: Grant
    Filed: July 2, 2001
    Date of Patent: March 28, 2006
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Masateru Ohta, Nobuaki Kato, Mitsuaki Nakamura, Kazutaka Tachibana
  • Publication number: 20030158164
    Abstract: A compound pf general formula (I): 1
    Type: Application
    Filed: December 30, 2002
    Publication date: August 21, 2003
    Inventors: Masateru Ohta, Nobuaki Kato, Mitsuaki Nakamura, Kazutaka Tachibana