Patents by Inventor Satoshi Niizuma

Satoshi Niizuma 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: 10479780
    Abstract: An objective of the present invention is to provide low-molecular-weight compounds that can inhibit Src family kinases. The present invention relates to compounds represented by general formula (I) or pharmacologically acceptable salts thereof. In the formula, Ar1 is optionally substituted C6-10 arylene or 5- to 10-membered heteroarylene, and Ar2 is optionally substituted C6-10 aryl or 5- to 10-membered heteroaryl. R1 and R2 are defined as described in the specification.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: November 19, 2019
    Assignees: Chugai Seiyaku Kabushiki Kaisha, F. Hoffmann-La Roche AG
    Inventors: Hirosato Ebiike, Toshihiro Aoki, Takashi Chiba, Masami Kochi, Kimitaka Nakama, Satoshi Niizuma, Hiroki Nishii, Jun Ohwada, Hiroyuki Shimamura, Aiko Suge, Yoshito Nakanishi, Natsuki Kobayashi
  • Publication number: 20180362509
    Abstract: An objective of the present invention is to provide low-molecular-weight compounds that can inhibit Src family kinases. The present invention relates to compounds represented by general formula (I) or pharmacologically acceptable salts thereof. In the formula, Ar1 is optionally substituted C6-10 arylene or 5- to 10-membered heteroarylene, and Ar2 is optionally substituted C6-10 aryl or 5- to 10-membered heteroaryl. R1 and R2 are defined as described in the specification.
    Type: Application
    Filed: June 17, 2016
    Publication date: December 20, 2018
    Applicants: Chugai Seiyaku Kabushiki Kaisha, F. Hoffmann-La Roche AG
    Inventors: Hirosato Ebiike, Toshihiro Aoki, Takashi Chiba, Masami Kochi, Kimitaka Nakama, Satoshi Niizuma, Hiroki Nishii, Jun Ohwada, Hiroyuki Shimamura, Aiko Suge, Yoshito Nakanishi, Natsuki Kobayashi
  • Patent number: 10005739
    Abstract: The present invention relates to quinazolinone and isoquinolinone derivatives represented by formula (I) or pharmaceutically acceptable salts thereof.
    Type: Grant
    Filed: October 23, 2014
    Date of Patent: June 26, 2018
    Assignee: CHUGAI SEIYAKU KABUSHIKI KAISHA
    Inventors: Takeshi Murata, Sousuke Hara, Satoshi Niizuma, Kihito Hada, Hatsuo Kawada, Masahiro Sakaitani, Hideaki Shimada, Yoshito Nakanishi
  • Patent number: 9695118
    Abstract: The present invention relates to benzamide derivatives represented by formula (I) or pharmaceutically acceptable salts thereof.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: July 4, 2017
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Takeshi Murata, Satoshi Niizuma, Sousuke Hara, Hatsuo Kawada, Kihito Hada, Hideaki Shimada, Hiroshi Tanaka, Yoshito Nakanishi
  • Patent number: 9567304
    Abstract: The present invention relates to quinazolinedione derivatives represented by formula (I) or pharmaceutically acceptable salts thereof.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: February 14, 2017
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Takeshi Murata, Hatsuo Kawada, Satoshi Niizuma, Sousuke Hara, Kihito Hada, Hideaki Shimada, Hiroshi Tanaka, Toshiyuki Mio
  • Publication number: 20160272595
    Abstract: The present invention relates to quinazolinone and isoquinolinone derivatives represented by formula (I) or pharmaceutically acceptable salts thereof.
    Type: Application
    Filed: October 23, 2014
    Publication date: September 22, 2016
    Applicant: CHUGAI SEIYAKU KABUSHIKI KAISHA
    Inventors: Takeshi MURATA, Sousuke HARA, Satoshi NIIZUMA, Kihito HADA, Hatsuo KAWADA, Masahiro SAKAITANI, Hideaki SHIMADA, Yoshito NAKANISHI
  • Publication number: 20150152047
    Abstract: The present invention relates to benzamide derivatives represented by formula (I) or pharmaceutically acceptable salts thereof.
    Type: Application
    Filed: April 24, 2013
    Publication date: June 4, 2015
    Inventors: Takeshi Murata, Satoshi Niizuma, Sousuke Hara, Hatsuo Kawada, Kihito Hada, Hideaki Shimada, Hiroshi Tanaka, Yoshito Nakanishi
  • Publication number: 20150141400
    Abstract: The present invention relates to quinazolinedione derivatives represented by formula (I) or pharmaceutically acceptable salts thereof.
    Type: Application
    Filed: April 24, 2013
    Publication date: May 21, 2015
    Inventors: Takeshi Murata, Hatsuo Kawada, Satoshi Niizuma, Sousuke Hara, Kihito Hada, Hideaki Shimada, Hiroshi Tanaka, Toshiyuki Mio
  • Patent number: 8143274
    Abstract: The present invention provides: a compound represented by the following formula (I): [wherein Y1 and Y4 represent a hydrogen atom or a halogen atom; either one of Y2 and Y3 represents —NR1R2, and the other represents a hydrogen atom or a halogen atom; X represents an aryl group or a heteroaryl group that may be substituted; R1 represents a hydrogen atom, or a C1-8 alkyl group that may be substituted; and R2 represents a C1-8 alkyl group that is substituted with one or more substituents, —COOR3, —COR4, —COSR5, —CONR6R7, —NR22R23, or —C?NR24R25; or R1 and R2, together with a nitrogen atom to which they are bonded, may form a 4- to 10-membered hetero ring containing at least one nitrogen atom (wherein the hetero ring may be substituted with one or more substituents selected from Group C)], a prodrug thereof, or a pharmaceutically acceptable salt thereof; and a pharmaceutical, a pharmaceutical composition, or the like, which comprises the compound.
    Type: Grant
    Filed: February 7, 2005
    Date of Patent: March 27, 2012
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Kazuo Hattori, Satoshi Niizuma, Takehiro Okada, Hiroyuki Eda, Kenji Tatsuno, Miyuki Yoshida
  • Patent number: 7820693
    Abstract: The present invention provides a compound having high antitumor activity, which is useful for therapeutic and preventive agents effective for proliferative diseases such as cancer; a production method thereof; an intermediate compound useful for such production; and a pharmaceutical composition comprising such a compound. The present invention provides a compound represented by the formula (1): wherein X represents an aryl group or heteroaryl group which may be substituted, Cy represents a 4- to 7-membered monocyclic heterocyclic ring or a 8- to 10-membered condensed heterocyclic ring which may be substituted, and Z represents O, S, or NRa; or a prodrug thereof; or a pharmaceutically acceptable salt thereof; and a pharmaceutical and a pharmaceutical composition which comprise the compound.
    Type: Grant
    Filed: February 22, 2006
    Date of Patent: October 26, 2010
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Kazuo Hattori, Satoshi Niizuma, Miyako Masubuchi, Kohei Koyama, Osamu Kondoh, Toshiyuki Tsukaguchi, Takehiro Okada
  • Publication number: 20090326225
    Abstract: This invention relates to novel processes for the preparation of compounds of the formula [1], wherein R1, R2, R3 and R4 are as defined in the claims and description as well as pharmaceutically acceptable salts thereof. The compounds of the formula [1] are hexacyclic compounds having potent anti-tumor activity.
    Type: Application
    Filed: August 25, 2009
    Publication date: December 31, 2009
    Applicant: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Hiroshi Fukuda, Takeshi Murata, Satoshi Niizuma, Hitomi Suda, Masao Tsukazaki
  • Publication number: 20090312554
    Abstract: This invention relates to novel processes for the preparation of compounds of the formula [1], wherein R1, R2, R3 and R4 are as defined in the claims and description as well as pharmaceutically acceptable salts thereof. The compounds of the formula [1] are hexacyclic compounds having potent anti-tumor activity.
    Type: Application
    Filed: August 25, 2009
    Publication date: December 17, 2009
    Applicant: Chugai Seiyaku Kabushiki Kaisha
    Inventors: HIROSHI FUKUDA, TAKESHI MURATA, SATOSHI NIIZUMA, HITOMI SUDA, MASAO TSUKAZAKI
  • Patent number: 7595400
    Abstract: This invention relates to novel processes for the preparation of compounds of the formula [1], wherein R1, R2, R3 and R4 are as defined in the claims and description as well as pharmaceutically acceptable salts thereof. The compounds of the formula [1] are hexacyclic compounds having potent anti-tumor activity.
    Type: Grant
    Filed: February 20, 2004
    Date of Patent: September 29, 2009
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Hiroshi Fukuda, Takeshi Murata, Satoshi Niizuma, Hitomi Suda, Masao Tsukazaki
  • Publication number: 20090030195
    Abstract: The present invention provides a compound having high antitumor activity, which is useful for therapeutic and preventive agents effective for proliferative diseases such as cancer; a production method thereof; an intermediate compound useful for such production; and a pharmaceutical composition comprising such a compound. The present invention provides a compound represented by the formula (1): wherein X represents an aryl group or heteroaryl group which may be substituted, Cy represents a 4- to 7-membered monocyclic heterocyclic ring or a 8- to 10-membered condensed heterocyclic ring which may be substituted, and Z represents O, S, or NRa; or a prodrug thereof; or a pharmaceutically acceptable salt thereof; and a pharmaceutical and a pharmaceutical composition which comprise the compound.
    Type: Application
    Filed: February 22, 2006
    Publication date: January 29, 2009
    Applicant: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Kazuo Hattori, Satoshi Niizuma, Miyako Masubuchi, Kohei Koyama, Osamu Kondoh, Toshiyuki Tsukaguchi, Takehiro Okada
  • Publication number: 20070185160
    Abstract: The present invention provides: a compound represented by the following formula (I): [wherein Y1 and Y4 represent a hydrogen atom or a halogen atom; either one of Y2 and Y3 represents —NR1R2, and the other represents a hydrogen atom or a halogen atom; X represents an aryl group or a heteroaryl group that may be substituted; R1 represents a hydrogen atom, or a C1-8 alkyl group that may be substituted; and R2 represents a C1-8 alkyl group that is substituted with one or more substituents, —COOR3, —COR4, —COSR5, —CONR6R7, —NR22R23, or —C?NR24R25; or R1 and R2, together with a nitrogen atom to which they are bonded, may form a 4- to 10-membered hetero ring containing at least one nitrogen atom (wherein the hetero ring may be substituted with one or more substituents selected from Group C)], a prodrug thereof, or a pharmaceutically acceptable salt thereof; and a pharmaceutical, a pharmaceutical composition, or the like, which comprises the compound.
    Type: Application
    Filed: February 7, 2005
    Publication date: August 9, 2007
    Applicant: CHUGAI SEIYAKU KABUSHIKI KAISHA
    Inventors: Kazuo Hattori, Satoshi Niizuma, Takehiro Okada, Hiroyuki Eda, Kenji Tatsuno, Miyuki Yoshida
  • Patent number: 7109195
    Abstract: The present invention relates to hexacyclic compound of the formula [1], wherein Z, R3 and R4 are as identified therein, and pharmaceutically acceptable salts thereof. These compounds are useful in the treatment of cell proliferative disorders.
    Type: Grant
    Filed: September 16, 2004
    Date of Patent: September 19, 2006
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Takeshi Murata, Satoshi Niizuma, Nobuo Shimma, Hitomi Suda, Masao Tsukazaki
  • Publication number: 20050059679
    Abstract: The present invention relates to hexacyclic compound of the formula [1], wherein Z, R3 and R4 are as identified therein, and pharmaceutically acceptable salts thereof. These compounds are useful in the treatment of cell proliferative disorders.
    Type: Application
    Filed: September 16, 2004
    Publication date: March 17, 2005
    Inventors: Takeshi Murata, Satoshi Niizuma, Nobuo Shimma, Hitomi Suda, Masao Tsukazaki
  • Patent number: 6825194
    Abstract: The present invention relates to hexacyclic compound of the formula [1], wherein Z, R3 and R4 are as identified therein, and pharmaceutically acceptable salts thereof. These compounds are useful in the treatment of cell proliferative disorders.
    Type: Grant
    Filed: November 26, 2002
    Date of Patent: November 30, 2004
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Takeshi Murata, Satoshi Niizuma, Nobuo Shimma, Hitomi Suda, Masao Tsukazaki
  • Publication number: 20030144304
    Abstract: The present invention relates to hexacyclic compound of the formula [1], 1
    Type: Application
    Filed: November 26, 2002
    Publication date: July 31, 2003
    Inventors: Takeshi Murata, Satoshi Niizuma, Nobuo Shimma, Hitomi Suda, Masao Tsukazaki