Patents by Inventor Sawako Ozawa

Sawako Ozawa 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: 8609656
    Abstract: The present invention provides a compound represented by the formula (1): wherein R1, R2 and R5 are each independently selected from a hydrogen atom, a halogen atom, a C1-C6 alkyl is substituted with a halogen atom and the like; R3 and R4 are each independently selected from a hydrogen atom, a halogen atom, a substituted C1-C6 alkyl group and the like; R6 and R7 are each independently selected from a hydrogen atom and a halogen atom; Z1 and Z2 are each independently selected from a hydrogen atom, a hydroxyl group and —O(CHR11)OC(?O)R12; Q is a group of the formula: (wherein G1 is C—Y2 or N; a ring A is a benzene ring or a 5- to 6-membered unsaturated heterocycle) a pharmaceutically acceptable salt thereof or a prodrug thereof.
    Type: Grant
    Filed: February 23, 2005
    Date of Patent: December 17, 2013
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Nobuhiro Oikawa, Eisaku Mizuguchi, Kenji Morikami, Nobuo Shimma, Nobuya Ishii, Toshiyuki Tsukaguchi, Sawako Ozawa
  • Patent number: 8569378
    Abstract: The present invention provides a p27 protein inducing agent comprising a compound represented by general formula (11) below or pharmaceutically acceptable salt thereof as an active ingredient: wherein G1, G2, G3 and G8 are each independently selected from —N? etc., Ring G6 is selected from divalent aryl etc., A is selected from amino etc., G4 is selected from oxygen etc., G5 is selected from oxygen etc., G7 is selected from —CH2— etc., and R2 is selected from C1-6 alkyl etc.
    Type: Grant
    Filed: July 18, 2008
    Date of Patent: October 29, 2013
    Assignees: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Toshiyuki Sakai, Hitoshi Iikura, Ikumi Hyoudoh, Toshihiro Aoki, Noriyuki Furuichi, Masayuki Matsushita, Fumio Watanabe, Sawako Ozawa, Masahiro Sakaitani, Pil-Su Ho, Yasushi Tomii, Kenji Takanashi, Naoki Harada
  • Patent number: 8299252
    Abstract: It is intended to provide a compound represented by the formula (1): [wherein Ar is an arylene group to be attached selected from the following formula (2): (wherein * represents a binding site to a nitrogen atom and ** represents a binding site to T); T represents —(O)n—R; R represents a C1-C6 alkyl group or the like; n represents 0 or 1; X represents O or the like; R2, R3 and R4 are independently selected from a hydrogen atom or C1-C3 alkyl; or R2 and R3 may join together with an urea structure containing the nitrogen atoms to which they bind to form a 5- or 6-membered heterocycle; Y represents CH or N], or a pharmaceutically acceptable salt thereof or a prodrug thereof and a pharmaceutical composition containing the same.
    Type: Grant
    Filed: August 4, 2006
    Date of Patent: October 30, 2012
    Assignees: Chugai Seiyaku Kabushiki Kaisha, The University of Tokyo
    Inventors: Sawako Ozawa, Nobuhiro Oikawa, Eisaku Mizuguchi, Hirosato Ebiike, Fumio Watanabe, Kenji Morikami, Nobuo Shimma, Nobuya Ishii, Toshiyuki Tsukaguchi
  • Patent number: 8278465
    Abstract: The present invention provides a compound represented by general formula (1) below or a pharmaceutically acceptable salt thereof: wherein: X is selected from heteroaryl etc., Y1 and Y2 are selected from —N? etc., Y3 and Y4 are selected from —CH? etc., A is selected from sulfamide etc., R1 is selected from hydrogen etc., and R2 is selected from C1-6 alkyl etc. The compound or salt has sufficiently high antitumor activity, and is useful in the treatment of cell proliferative disorders, particularly cancers. The present invention also provides a pharmaceutical composition containing the compound or salt as an active ingredient.
    Type: Grant
    Filed: December 3, 2010
    Date of Patent: October 2, 2012
    Assignees: Chugai Seiyaku Kabushiki Kaisha, Sakai Toshiyuki
    Inventors: Hitoshi Iikura, Ikumi Hyoudoh, Toshihiro Aoki, Noriyuki Furuichi, Masayuki Matsushita, Fumio Watanabe, Sawako Ozawa, Masahiro Sakaitani, Pil-Su Ho, Yasushi Tomii, Kenji Takanashi, Naoki Harada
  • Publication number: 20110092700
    Abstract: The present invention provides a compound represented by general formula (1) below or a pharmaceutically acceptable salt thereof: wherein: X is selected from heteroaryl etc., Y1 and Y2 are selected from —N? etc., Y3 and Y4 are selected from —CH? etc., A is selected from sulfamide etc., R1 is selected from hydrogen etc., and R2 is selected from C1-6 alkyl etc. The compound or salt has sufficiently high antitumor activity, and is useful in the treatment of cell proliferative disorders, particularly cancers. The present invention also provides a pharmaceutical composition containing the compound or salt as an active ingredient.
    Type: Application
    Filed: December 3, 2010
    Publication date: April 21, 2011
    Inventors: Hitoshi Iikura, Ikumi Hyoudoh, Toshihiro Aoki, Noriyuki Furuichi, Masayuki Matsushita, Fumio Watanabe, Sawako Ozawa, Masahiro Sakaitani, Pil-Su Ho, Yasushi Tomii, Kenji Takanashi, Naoki Harada
  • Patent number: 7910593
    Abstract: An objective of the present invention is to provide water-soluble prodrugs that can be administered parenterally, and which show excellent water solubility and small interspecies or individual differences and are rapidly converted to the active form by chemical conversion. This invention provides water-soluble prodrugs represented by formula (1), or pharmaceutically acceptable salts, or hydrates or solvates thereof, (wherein, R1 represents a hydrogen atom, or C1-C6 alkyl group; W represents a divalent group comprising a tertiary amino group or sulfonyl group; and Y represents a residue of a compound represented by Y—OH comprising an alcoholic hydroxyl group).
    Type: Grant
    Filed: April 8, 2005
    Date of Patent: March 22, 2011
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Isao Umeda, Jun Ohwada, Sawako Ozawa
  • Patent number: 7897792
    Abstract: The present invention provides a compound represented by general formula (1) below or a pharmaceutically acceptable salt thereof: wherein: X is selected from heteroaryl etc., Y1 and Y2 are selected from —N? etc., Y3 and Y4 are selected from —CH? etc., A is selected from sulfamide etc., R1 is selected from hydrogen etc., and R2 is selected from C1-6 alkyl etc. The compound or salt has sufficiently high antitumor activity, and is useful in the treatment of cell proliferative disorders, particularly cancers. The present invention also provides a pharmaceutical composition containing the compound or salt as an active ingredient.
    Type: Grant
    Filed: February 9, 2007
    Date of Patent: March 1, 2011
    Assignees: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Hitoshi Iikura, Ikumi Hyoudoh, Toshihiro Aoki, Noriyuki Furuichi, Masayuki Matsushita, Fumio Watanabe, Sawako Ozawa, Masahiro Sakaitani, Pil-Su Ho, Yasushi Tomii, Kenji Takanashi, Naoki Harada
  • Publication number: 20110009398
    Abstract: The present invention provides a p27 protein inducing agent comprising a compound represented by general formula (11) below or pharmaceutically acceptable salt thereof as an active ingredient: wherein G1, G2, G3 and G8 are each independently selected from —N? etc., Ring G6 is selected from divalent aryl etc., A is selected from amino etc., G4 is selected from oxygen etc., G5 is selected from oxygen etc., G7 is selected from —CH2— etc., and R2 is selected from C1-6 alkyl etc.
    Type: Application
    Filed: July 18, 2008
    Publication date: January 13, 2011
    Inventors: Toshiyuki Sakai, Hitoshi Iikura, Ikumi Hyoudoh, Toshihiro Aoki, Noriyuki Furuichi, Masayuki Matsushita, Fumio Watanabe, Sawako Ozawa, Masahiro Sakaitani, Pil-Su Ho, Yasushi Tomii, Kenji Takanashi, Naoki Harada
  • Publication number: 20100168430
    Abstract: It is intended to provide a compound represented by the formula (1): [wherein Ar is an arylene group to be attached selected from the following formula (2): (wherein * represents a binding site to a nitrogen atom and ** represents a binding site to T); T represents —(O)n—R; R represents a C1-C6 alkyl group or the like; n represents 0 or 1; X represents O or the like; R2, R3 and R4 are independently selected from a hydrogen atom or C1-C3 alkyl; or R2 and R3 may join together with an urea structure containing the nitrogen atoms to which they bind to form a 5- or 6-membered heterocycle; Y represents CH or N], or a pharmaceutically acceptable salt thereof or a prodrug thereof and a pharmaceutical composition containing the same.
    Type: Application
    Filed: August 4, 2006
    Publication date: July 1, 2010
    Applicants: Chugai Seiyaku Kabushiki Kaisha, The University of Tokyo
    Inventors: Sawako Ozawa, Nobuhiro Oikawa, Eisaku Mizuguchi, Hirosato Ebiike, Fumio Watanabe, Kenji Morikami, Nobuo Shimma, Nobuya Ishii, Toshiyuki Tsukaguchi, Yasuhiro Tamaki, Hidenori Takahashi
  • Publication number: 20100004233
    Abstract: The present invention provides a compound represented by general formula (1) below or a pharmaceutically acceptable salt thereof: wherein: X is selected from heteroaryl etc., Y1 and Y2 are selected from —N? etc., Y3 and Y4 are selected from —CH? etc., A is selected from sulfamide etc., R1 is selected from hydrogen etc., and R2 is selected from C1-6 alkyl etc. The compound or salt has sufficiently high antitumor activity, and is useful in the treatment of cell proliferative disorders, particularly cancers. The present invention also provides a pharmaceutical composition containing the compound or salt as an active ingredient.
    Type: Application
    Filed: February 9, 2007
    Publication date: January 7, 2010
    Inventors: Hitoshi Iikura, Ikumi Hyoudoh, Toshihiro Aoki, Noriyuki Furuichi, Masayuki Matsushita, Fumio Watanabe, Sawako Ozawa, Masahiro Sakaitani, Pil-Su Ho, Yasushi Tomii, Kenji Takanashi, Naoki Harada
  • Publication number: 20090118271
    Abstract: Preventive or therapeutic agents for pancreatic cancer, ovarian cancer, or liver cancer of the present invention comprise a water-soluble prodrug represented by formula 1 described below, or a pharmaceutically acceptable salt, or a hydrate or solvate of the prodrug or pharmaceutically acceptable salt, (wherein, R1 represents a hydrogen atom, or a C1-C6 alkyl group; W represents a divalent group comprising a tertiary amino group or a divalent group comprising a sulfonyl group, and Y represents a residue of a compound represented by Y—OH comprising an alcoholic hydroxyl group, wherein said Y—OH is a camptothecin, a taxane, or an anticancer nucleotide).
    Type: Application
    Filed: October 19, 2006
    Publication date: May 7, 2009
    Applicant: CHUGAI SEIYAKU KABUSHIKI KAISHA
    Inventors: Isao Umeda, Jun Ohwada, Sawako Ozawa, Mika Endo, Masako Ura
  • Publication number: 20080119466
    Abstract: The present invention provides a compound represented by the formula (1): wherein R1, R2 and R5 are each independently selected from a hydrogen atom, a halogen atom, a C1-C6 alkyl is substituted with a halogen atom and the like; R3 and R4 are each independently selected from a hydrogen atom, a halogen atom, a substituted C1-C6 alkyl group and the like; R6 and R7 are each independently selected from a hydrogen atom and a halogen atom; Z1 and Z2 are each independently selected from a hydrogen atom, a hydroxyl group and —O(CHR11)OC(?O)R12; Q is a group of the formula: (wherein G1 is C—Y2 or N; a ring A is a benzene ring or a 5- to 6-membered unsaturated heterocycle) a pharmaceutically acceptable salt thereof or a prodrug thereof.
    Type: Application
    Filed: February 23, 2005
    Publication date: May 22, 2008
    Applicant: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Nobuhiro Oikawa, Eisaku Mizuguchi, Kenji Morikami, Nobuo Shimma, Nobuya Ishii, Toshiyuki Tsukaguchi, Sawako Ozawa
  • Publication number: 20080015157
    Abstract: An objective of the present invention is to provide water-soluble prodrugs that can be administered parenterally, and which show excellent water solubility and small interspecies or individual differences and are rapidly converted to the active form by chemical conversion. This invention provides water-soluble prodrugs represented by formula (1), or pharmaceutically acceptable salts, or hydrates or solvates thereof, (wherein, R1 represents a hydrogen atom, or C1-C6 alkyl group; W represents a divalent group comprising a tertiary amino group or sulfonyl group; and Y represents a residue of a compound represented by Y—OH comprising an alcoholic hydroxyl group).
    Type: Application
    Filed: April 8, 2005
    Publication date: January 17, 2008
    Applicant: CHUGAI SEIYAKU KABUSHIKI KAISHA
    Inventors: Isao Umeda, Jun Ohwada, Sawako Ozawa