Patents by Inventor Shigekazu Fujita

Shigekazu Fujita 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: 20230265073
    Abstract: The present invention provides novel benzazepine compounds of Formula (1), or salts thereof, having vasopressin V1a and V2 antagonisms, and medical uses thereof. In the formula, R1 is optionally substituted C1-6 alkyl, etc.; L is —C(?O)—NH—, etc.; Ring A1 is a hydrocarbon ring, etc.; Ring A2 is a hydrocarbon ring, etc.; and each of Rings A1 and A2 may have at least one substituent.
    Type: Application
    Filed: April 27, 2023
    Publication date: August 24, 2023
    Applicant: OTSUKA PHARMACEUTICAL CO., LTD.
    Inventors: Keizo KAN, Masatoshi TAKUWA, Hirotaka TANAKA, Hideto FUJIWARA, Hokuto YAMABE, Satoshi MATSUDA, Kazuhiro OHDACHI, Taiki HANARI, Yasuhiro MENJO, Tatsuya URUSHIMA, Shigekazu FUJITA
  • Patent number: 11673878
    Abstract: The present invention provides novel benzazepine compounds of Formula (1), or salts thereof, having vasopressin V1a and V2 antagonisms, and medical uses thereof. In the formula, R1 is optionally substituted C1-6 alkyl, etc.; L is —C(?O)—NH—, etc.; Ring A1 is a hydrocarbon ring, etc.; Ring A2 is a hydrocarbon ring, etc.; and each of Rings A1 and A2 may have at least one substituent.
    Type: Grant
    Filed: November 24, 2020
    Date of Patent: June 13, 2023
    Assignee: OTSUKA PHARMACEUTICAL CO., LTD.
    Inventors: Keizo Kan, Masatoshi Takuwa, Hirotaka Tanaka, Hideto Fujiwara, Hokuto Yamabe, Satoshi Matsuda, Kazuhiro Ohdachi, Taiki Hanari, Yasuhiro Menjo, Tatsuya Urushima, Shigekazu Fujita
  • Publication number: 20210078976
    Abstract: The present invention provides novel benzazepine compounds of Formula (1), or salts thereof, having vasopressin V1a and V2 antagonisms, and medical uses thereof. In the formula, R1 is optionally substituted C1-6 alkyl, etc.; L is —C(?O)—NH—, etc.; Ring A1 is a hydrocarbon ring, etc.; Ring A2 is a hydrocarbon ring, etc.; and each of Rings A1 and A2 may have at least one substituent.
    Type: Application
    Filed: November 24, 2020
    Publication date: March 18, 2021
    Applicant: OTSUKA PHARMACEUTICAL CO., LTD.
    Inventors: Keizo KAN, Masatoshi TAKUWA, Hirotaka TANAKA, Hideto FUJIWARA, Hokuto YAMABE, Satoshi MATSUDA, Kazuhiro OHDACHI, Taiki HANARI, Yasuhiro MENJO, Tatsuya URUSHIMA, Shigekazu FUJITA
  • Patent number: 10889570
    Abstract: The present invention provides novel benzazepine compounds of Formula (1), or salts thereof, having vasopressin V1a and V2 antagonisms, and medical uses thereof. In the formula, R1 is optionally substituted C1-6 alkyl, etc.; L is —C(?O)—NH—, etc.; Ring A1 is a hydrocarbon ring, etc.; Ring A2 is a hydrocarbon ring, etc.; and each of Rings A1 and A2 may have at least one substituent.
    Type: Grant
    Filed: June 29, 2018
    Date of Patent: January 12, 2021
    Assignee: OTSUKA PHARMACEUTICAL CO., LTD.
    Inventors: Keizo Kan, Masatoshi Takuwa, Hirotaka Tanaka, Hideto Fujiwara, Hokuto Yamabe, Satoshi Matsuda, Kazuhiro Ohdachi, Taiki Hanari, Yasuhiro Menjo, Tatsuya Urushima, Shigekazu Fujita
  • Patent number: 10626095
    Abstract: This invention relates to a cyanotriazole compound represented by the formula (1): wherein each symbols are defined in the specification, or a salt thereof. The compound or a salt thereof stimulates the citric acid cycle activity and/or improves hyperglycemia with less side effects, and excellent safety, and therefore, it is useful for treating and/or preventing diseases or disorders on which citric acid cycle activation and/or improvement of hyperglycemia has a prophylactic and/or therapeutic effect, for example, diabetes, impaired glucose tolerance, insulin resistance, diabetic complications, obesity, dyslipidemia, hepatic steatosis, atherosclerosis and/or cardiovascular disease, as well as diseases or disorders that would benefit from stimulating energy expenditure.
    Type: Grant
    Filed: July 16, 2014
    Date of Patent: April 21, 2020
    Assignee: OTSUKA PHARMACEUTICAL CO., LTD.
    Inventors: Seiji Sato, Satoshi Matsuda, Chiharu Matsumura, Motohiro Itotani, Toshio Shinohara, Shigekazu Fujita, Yohji Sakurai, Kuninori Tai, Tae Fukushima, Naohide Kanemoto, Takashi Okamoto
  • Publication number: 20190389838
    Abstract: The present invention provides novel benzazepine compounds of Formula (1), or salts thereof, having vasopressin V1a and V2 antagonisms, and medical uses thereof. In the formula, R1 is optionally substituted C1-6 alkyl, etc.; L is —C(?O)—NH—, etc.; Ring A1 is a hydrocarbon ring, etc.; Ring A2 is a hydrocarbon ring, etc.; and each of Rings A1 and A2 may have at least one substituent.
    Type: Application
    Filed: June 29, 2018
    Publication date: December 26, 2019
    Applicant: OTSUKA PHARMACEUTICAL CO., LTD.
    Inventors: Keizo KAN, Masatoshi TAKUWA, Hirotaka TANAKA, Hideto FUJIWARA, Hokuto YAMABE, Satoshi MATSUDA, Kazuhiro OHDACHI, Taiki HANARI, Yasuhiro MENJO, Tatsuya URUSHIMA, Shigekazu FUJITA
  • Publication number: 20160229816
    Abstract: This invention relates to a cyanotriazole compound represented by the formula (1): wherein each symbols are defined in the specification, or a salt thereof. The compound or a salt thereof stimulates the citric acid cycle activity and/or improves hyperglycemia with less side effects, and excellent safety, and therefore, it is useful for treating and/or preventing diseases or disorders on which citric acid cycle activation and/or improvement of hyperglycemia has a prophylactic and/or therapeutic effect, for example, diabetes, impaired glucose tolerance, insulin resistance, diabetic complications, obesity, dyslipidemia, hepatic steatosis, atherosclerosis and/or cardiovascular disease, as well as diseases or disorders that would benefit from stimulating energy expenditure.
    Type: Application
    Filed: July 16, 2014
    Publication date: August 11, 2016
    Applicant: OTSUKA PHARMACEUTICAL CO., LTD.
    Inventors: Seiji SATO, Satoshi MATSUDA, Chiharu MATSUMURA, Motohire ITOTANI, Toshio SHINOHARA, Shigekazu FUJITA, Yohji SAKURAI, Kuninori TAI, Tae FUKUSHIMA, Naohide KANEMOTO, Takashi OKAMOTO
  • Patent number: 8722663
    Abstract: The present invention provides a novel compound having an excellent antitumor effect. The compound of the present invention is represented by the following general formula (1) wherein R1 and R2 are aryl or the like; A is lower alkylene; Ring X is optionally substituted arylene; E is bond or lower alkenylene; Ring Y is optionally substituted heterocycloalkylene containing one or more nitrogen atoms, one of which is attached to the adjacent carbonyl group; G is —NH-G2-, —N(lower alkyl)-G2-, —NH—CH2-G2-, —N(lower alkyl)-CH2-G2- or —CH2-G2-, [wherein G2 binds to R2, G2-R2 is bond-R2, phenylene-G3-R2, phenylene-G4-O—R2, phenylene-G5-NH—R2, phenylene-G6-N(lower alkyl)-R2 or quinolinediyl-O—R2, the phenylene of said phenylene-containing groups being optionally substituted with one or more substituents; G3-R2 is —O-lower alkylene-R2 or the like; G4-O— is lower alkylene-O— or the like; G5 is lower alkylene; G6 is lower alkylene].
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: May 13, 2014
    Assignee: Otsuka Pharmaceutical Co., Ltd.
    Inventors: Hideki Takasu, Shigekazu Fujita, Shinya Ohtsuka, Toshiyuki Hirose, Yosuke Sato, Satoshi Yamada, Keisuke Miyajima, Koji Sakai, Yutaka Kojima, Kazuo Sekiguchi, Yasuo Yanagihara, Takashi Suzuki, Hideo Tanaka, Kazuhisa Sugiyama, Mitsuhiro Okuno, Takumi Sumida
  • Patent number: 8551999
    Abstract: The present invention provides a heterocyclic compound represented by General Formula (1): wherein R1 is a group R5—Z1—, etc., Z1 is a lower alkylene group, etc., and R5 is a group represented by General Formula; wherein R13 is a hydrogen atom, etc., m is an integer from 1 to 5; R2 is a hydrogen atom: Y is CH or N: A1 is a heterocyclic ring selected from the group consisting of indolediyl groups, wherein the heterocyclic ring may have at least one substituent: T is a group —CO—, etc.: R3 is a hydrogen atom, etc.: R4 is a lower alkyl group optionally substituted by one or more hydroxy groups, etc.: R3 and R4, together with the nitrogen atom to which they bind, may bind to each other and form a 5- to 10-membered saturated heterocyclic ring, wherein the heterocyclic ring may have at least one substituent. The heterocyclic compound of the present invention has excellent effects of suppressing the production of collagen and/or treating tumors.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: October 8, 2013
    Assignee: Otsuka Pharmaceutical Co., Ltd.
    Inventors: Takumi Sumida, Fujio Tabusa, Kazuo Sekiguchi, Takeshi Kodama, Koichi Yasumura, Yutaka Kojima, Masaaki Motoyama, Keisuke Miyajima, Kenji Yoshida, Keizo Kan, Makoto Sakamoto, Hideki Takasu, Takashi Nakagawa, Naoto Ohi, Yasuo Harada, Norikazu Hashimoto, Hironori Matsuyama, Masatoshi Iida, Shigekazu Fujita, Tae Fukushima
  • Patent number: 8501730
    Abstract: This invention provides a process for preparing benzazepine compounds of the formula (1): wherein X1 is a halogen atom, R1 and R2 are a lower alkyl group, or salts thereof as well as intermediate benzoic acid compounds in high yield and high purity on industrial scale, which are useful as an intermediate for preparing a pharmaceutically active 2,3,4,5-tetrahydro-1H-1-benzazepine compound having vasopressin antagonistic activity.
    Type: Grant
    Filed: May 17, 2012
    Date of Patent: August 6, 2013
    Assignee: Otsuka Pharmaceutical Co., Ltd.
    Inventors: Yasuhiro Torisawa, Kaoru Abe, Yasuaki Muguruma, Shigekazu Fujita, Hidenori Ogawa, Naoto Utsumi, Masahiro Miyake
  • Publication number: 20120283242
    Abstract: The present invention provides a novel compound having an excellent antitumor effect. The compound of the present invention is represented by the following general formula (1) wherein R1 and R2 are aryl or the like; A is lower alkylene; Ring X is optionally substituted arylene; E is bond or lower alkenylene; Ring Y is optionally substituted heterocycloalkylene containing one or more nitrogen atoms, one of which is attached to the adjacent carbonyl group; G is —NH-G2-, —N(lower alkyl)-G2-, —NH—CH2-G2-, —N(lower alkyl)-CH2-G2- or —CH2-G2-, [wherein G2 binds to R2, G2-R2 is bond-R2, phenylene-G3-R2, phenylene-G4-O—R2, phenylene-G5-NH—R2, phenylene-G6-N(lower alkyl)-R2 or quinolinediyl-O—R2, the phenylene of said phenylene-containing groups being optionally substituted with one or more substituents; G3-R2 is —O-lower alkylene-R2 or the like; G4-O— is lower alkylene-O— or the like; G5 is lower alkylene; G6 is lower alkylene].
    Type: Application
    Filed: January 28, 2011
    Publication date: November 8, 2012
    Inventors: Hideki Takasu, Shigekazu Fujita, Shinya Ohtsuka, Toshiyuki Hirose, Yosuke Sato, Satoshi Yamada, Keisuke Miyajima, Koji Sakai, Yutaka Kojima, Kazuo Sekiguchi, Yasuo Yanagihara, Takashi Suzuki, Hideo Tanaka, Kazuhisa Sugiyama, Mitsuhiro Okuno, Takumi Sumida
  • Patent number: 8273735
    Abstract: This invention provides a process for preparing benzazepine compounds of the formula (1): wherein X1 is a halogen atom, R1 and R2 are a lower alkyl group, or salts thereof as well as intermediate benzoic acid compounds in high yield and high purity on industrial scale, which are useful as an intermediate for preparing a pharmaceutically active 2,3,4,5-tetrahydro-1H-1-benzazepine compound having vasopressin antagonistic activity.
    Type: Grant
    Filed: September 1, 2006
    Date of Patent: September 25, 2012
    Assignee: Otsuka Pharmaceutical Co., Ltd.
    Inventors: Yasuhiro Torisawa, Kaoru Abe, Yasuaki Muguruma, Shigekazu Fujita, Hidenori Ogawa, Naoto Utsumi, Masahiro Miyake
  • Publication number: 20120226034
    Abstract: This invention provides a process for preparing benzazepine compounds of the formula (1): wherein X1 is a halogen atom, R1 and R2 are a lower alkyl group, or salts thereof as well as intermediate benzoic acid compounds in high yield and high purity on industrial scale, which are useful as an intermediate for preparing a pharmaceutically active 2,3,4,5-tetrahydro-1H-1-benzazepine compound having vasopressin antagonistic activity.
    Type: Application
    Filed: May 17, 2012
    Publication date: September 6, 2012
    Inventors: Yasuhiro Torisawa, Kaoru Abe, Yasuaki Muguruma, Shigekazu Fujita, Hidenori Ogawa, Naoto Utsumi, Masahiro Miyake
  • Patent number: 8222276
    Abstract: The invention provides an amine salt of a carbostyril derivative formed from a carbostyril derivative represented by the formula (1) [wherein R is a halogen atom; the substituted position of the side chain is 3- or 4-position in the carbostyril skeleton; and the bonding between 3- and 4-positions of the carbostyril skeleton is a single bond or a double bond] and an amine; and the invention is useful as drugs for treating various diseases, especially as aqueous formulations due to the superior water solubility and the superior pharmacologic effects.
    Type: Grant
    Filed: April 26, 2010
    Date of Patent: July 17, 2012
    Assignee: Otsuka Pharmaceutical Co., Ltd.
    Inventors: Yoshihiro Nishioka, Shinji Aki, Shigekazu Fujita, Yoshinao Onishi, Shun-ichiro Sumida
  • Publication number: 20120130082
    Abstract: The present invention relates to a 1-substituted-4-nitroimidazole compound represented by the general formula (1) or a salt thereof, (wherein R is a hydrogen atom, a lower alkoxy group-substituted lower alkyl group, a phenyl-lower alkoxy group-substituted lower alkyl group, a cyano-substituted lower alkyl group, a phenyl-lower alkyl group which may have lower alkoxy groups as the substituents in the phenyl ring or a group of the formula —CH2RA; X is a halogen atom or a group of the formula —S(O)n-R1) and method for preparing the same. The compound of the formula (1) is a useful compound as an intermediate for synthesis of various pharmaceutical and agricultural chemicals, particularly, as intermediates for antitubercular agents.
    Type: Application
    Filed: January 31, 2012
    Publication date: May 24, 2012
    Inventors: Fumitaka GOTO, Noriaki Takemura, Tadaaki Otani, Takeshi Hasegawa, Hidetsugu Tsubouchi, Naoto Utsumi, Shigekazu Fujita, Hideaki Kuroda, Takuya Shitsuta, Hirofumi Sasaki
  • Patent number: 8129544
    Abstract: The present invention relates to a 1-substituted-4-nitroimidazole compound represented by the general formula (1) or a salt thereof, (wherein R is a hydrogen atom, a lower alkoxy group-substituted lower alkyl group, a phenyl-lower alkoxy group-substituted lower alkyl group, a cyano-substituted lower alkyl group, a phenyl-lower alkyl group which may have lower alkoxy groups as the substituents in the phenyl ring or a group of the formula —CH2RA; X is a halogen atom or a group of the formula —S(O)n-R1) and method for preparing the same. The compound of the formula (1) is a useful compound as an intermediate for synthesis of various pharmaceutical and agricultural chemicals, particularly, as intermediates for antitubercular agents.
    Type: Grant
    Filed: October 1, 2007
    Date of Patent: March 6, 2012
    Assignee: Otsuka Pharmaceutical Co., Ltd.
    Inventors: Fumitaka Goto, Noriaki Takemura, Tadaaki Otani, Takeshi Hasegawa, Hidetsugu Tsubouchi, Naoto Utsumi, Shigekazu Fujita, Hideaki Kuroda, Takuya Shitsuta, Hirofumi Sasaki
  • Publication number: 20100261720
    Abstract: The present invention provides a heterocyclic compound represented by General Formula (1): wherein R1 is a group R5—Z1—, etc., Z1 is a lower alkylene group, etc., and R5 is a group represented by General Formula; wherein R13 is a hydrogen atom, etc., m is an integer from 1 to 5; R2 is a hydrogen atom: Y is CH or N: A1 is a heterocyclic ring selected from the group consisting of indolediyl groups, wherein the heterocyclic ring may have at least one substituent: T is a group —CO—, etc.: R3 is a hydrogen atom, etc.: R4 is a lower alkyl group optionally substituted by one or more hydroxy groups, etc.: R3 and R4, together with the nitrogen atom to which they bind, may bind to each other and form a 5- to 10-membered saturated heterocyclic ring, wherein the heterocyclic ring may have at least one substituent. The heterocyclic compound of the present invention has excellent effects of suppressing the production of collagen and/or treating tumors.
    Type: Application
    Filed: October 29, 2008
    Publication date: October 14, 2010
    Applicant: OTSUKA PHARMACEUTICAL CO., LTD.
    Inventors: Takumi Sumida, Fujio Tabusa, Kazuo Sekiguchi, Takeshi Kodama, Koichi Yasumura, Yutaka Kojima, Masaaki Motoyama, Keisuke Miyajima, Kenji Yoshida, Keizo Kan, Makoto Sakamoto, Hideki Takasu, Takashi Nakagawa, Naoto Ohi, Yasuo Harada, Norikazu Hashimoto, Hironori Matsuyama, Masatoshi Iida, Shigekazu Fujita, Tae Fukushima
  • Patent number: 7807843
    Abstract: The present invention relates to a 1-substituted-4-nitroimidazole compound represented by the general formula (1) or a salt thereof, (wherein R is a hydrogen atom, a lower alkoxy group-substituted lower alkyl group, a phenyl-lower alkoxy group-substituted lower alkyl group, a cyano-substituted lower alkyl group, a phenyl-lower alkyl group which may have lower alkoxy groups as the substituents in the phenyl ring or a group of the formula —CH2RA; X is a halogen atom or a group of the formula —S(O)n-R1) and method for preparing the same. The compound of the formula (1) is a useful compound as an intermediate for synthesis of various pharmaceutical and agricultural chemicals, particularly, as intermediates for antitubercular agents.
    Type: Grant
    Filed: January 15, 2008
    Date of Patent: October 5, 2010
    Assignee: Otsuka Pharmaceutical Co., Ltd.
    Inventors: Fumitaka Goto, Noriaki Takemura, Tadaaki Otani, Takeshi Hasegawa, Hidetsugu Tsubouchi, Naoto Utsumi, Shigekazu Fujita, Hideaki Kuroda, Takuya Shitsuta, Hirofumi Sasaki
  • Publication number: 20100210684
    Abstract: The invention provides an amine salt of a carbostyril derivative formed from a carbostyril derivative represented by the formula (1) [wherein R is a halogen atom; the substituted position of the side chain is 3- or 4-position in the carbostyril skeleton; and the bonding between 3- and 4-positions of the carbostyril skeleton is a single bond or a double bond] and an amine; and the invention is useful as drugs for treating various diseases, especially as aqueous formulations due to the superior water solubility and the superior pharmacologic effects.
    Type: Application
    Filed: April 26, 2010
    Publication date: August 19, 2010
    Inventors: Yoshihiro Nishioka, Shinji Aki, Shigekazu Fujita, Yoshinao Onishi, Shun-Ichiro Sumida
  • Patent number: 7732611
    Abstract: The invention provides an amine salt of a carbostyril derivative formed from a carbostyril derivative represented by the formula (1) [wherein R is a halogen atom; the substituted position of the side chain is 3- or 4-position in the carbostyril skeleton; and the bonding between 3- and 4-positions of the carbostyril skeleton is a single bond or a double H bond] and an amine; and the invention is useful as drugs for treating various diseases, especially as aqueous formulations due to the superior water solubility and the superior pharmacologic effects.
    Type: Grant
    Filed: January 20, 2005
    Date of Patent: June 8, 2010
    Assignee: Otsuka Pharmaceutical Co., Ltd.
    Inventors: Yoshihiro Nishioka, Shinji Aki, Shigekazu Fujita, Yoshinao Onishi, Shun-ichiro Sumida