Patents by Inventor Keizo Kan
Keizo Kan 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).
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Publication number: 20250051310Abstract: Provided are 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: ApplicationFiled: October 25, 2024Publication date: February 13, 2025Applicant: 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
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Publication number: 20230265073Abstract: 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: ApplicationFiled: April 27, 2023Publication date: August 24, 2023Applicant: 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
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Patent number: 11673878Abstract: 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: GrantFiled: November 24, 2020Date of Patent: June 13, 2023Assignee: 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
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Publication number: 20210078976Abstract: 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: ApplicationFiled: November 24, 2020Publication date: March 18, 2021Applicant: 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
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Patent number: 10889570Abstract: 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: GrantFiled: June 29, 2018Date of Patent: January 12, 2021Assignee: 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
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Publication number: 20190389838Abstract: 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: ApplicationFiled: June 29, 2018Publication date: December 26, 2019Applicant: 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
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Patent number: 8940727Abstract: An object of the present invention is to provide a novel benzazepine compound or a salt thereof, which has excellent vasopressin antagonistic activity. The benzazepine compound or a salt thereof of the present invention is represented by Formula (1): wherein R1, R2 and R5 may be the same or different and each represents H or D; and R3 and R4 each represents a C1-6 alkyl group, a C1-6 deuteroalkyl group, or a C1-6 perdeuteroalkyl group.Type: GrantFiled: October 25, 2010Date of Patent: January 27, 2015Assignee: Otsuka Pharmaceutical Co., Ltd.Inventors: Keizo Kan, Tadaaki Ohtani
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Patent number: 8551999Abstract: 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: GrantFiled: October 29, 2008Date of Patent: October 8, 2013Assignee: 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
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Publication number: 20130131045Abstract: An object of the present invention is to provide a novel benzazepine compound or a salt thereof, which has excellent vasopressin antagonistic activity. The benzazepine compound or a salt thereof of the present invention is represented by Formula (1): wherein R1, R2 and R5 may be the same or different and each represents H or D; and R3 and R4 each represents a C1-6 alkyl group, a C1-6 deuteroalkyl group, or a C1-6 perdeuteroalkyl group.Type: ApplicationFiled: October 25, 2010Publication date: May 23, 2013Applicant: OTSUKA PHARMACEUTICAL CO., LTD.Inventors: Keizo Kan, Tadaaki Ohtani
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Publication number: 20120238750Abstract: The compound of the present invention is represented by the following general formula (1): [wherein X1 represents a nitrogen atom or a group —CH?; R1 represents a group —Z—R6, wherein Z represents a group —CO—, a group —CH(OH)—, or the like, and R6 represents a 5- to 15-membered monocyclic, dicyclic, or tricyclic, saturated or unsaturated heterocyclic group having 1 to 4 nitrogen atoms, oxygen atoms, or sulfur atoms; R2 represents a hydrogen atom, a halogen atom or a lower alkylene group; Y represents a group —O—, a group —CO—, a group —CH(OH)—, a lower alkylene group, or the like; and A represents a group or the like, wherein R3 represents a hydrogen atom, a lower alkoxy group, or the like, p represents 1 or 2, and R4 represents an imidazolyl lower alkyl group or the like.Type: ApplicationFiled: February 29, 2012Publication date: September 20, 2012Inventors: Tae FUKUSHIMA, Shuji Matsumura, Noriaki Takemura, Hideaki Satou, Nobuaki Ito, Takuya Shitsuta, Hironori Tsutsui, Michinori Tanaka, Keizo Kan, Hitoshi Nagao, Kenji Watanabe, Kuninori Tai, Takashi Nakagawa, Hideki Takasu, Makoto Sakamoto, Keisuke Miyajima, Satoshi Yamada, Yutaka Kojima, Koichi Yasumura, Naoto Ohi, Mitsuhiro Okuno, Kazuhisa Sugiyama, Kunihiko Kiyono, Takashi Suzuki, Seiji Akamatsu, Takeshi Kodama, Yasuo Yanagihara, Takumi Sumida
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Patent number: 8236826Abstract: An object of the present invention is to provide a medicinal drug much improved in anti tumor activity and excellent in safety. According to the present invention, there is provided a medicinal drug containing a compound represented by the following general formula (1) or a salt thereof as an active ingredient: [Formula 1] wherein X1 represents a nitrogen atom or a group —CH?, R1 represents a group —Z—R6, in which Z represents a group —CO—, a group —CH(OH)— or the like, R6 represents a 5- to 15-membered monocyclic, dicyclic or tricyclic saturated or unsaturated heterocyclic group having 1 to 4 nitrogen atoms, oxygen atoms or sulfur atoms, R2 represents a hydrogen atom or a halogen atom, Y represents a group —O—, a group —CO—, a group —CH(OH)— or a lower alkylene group, and A represents [Formula 2] wherein R3 represents a hydrogen atom, a lower alkoxy group or the like, p represents 1 or 2, R4 represents an imidazolyl lower alkyl group or the like.Type: GrantFiled: December 4, 2006Date of Patent: August 7, 2012Assignee: Otsuka Pharmaceutical Co., Ltd.Inventors: Hironori Matsuyama, Kenji Ohnishi, Takashi Nakagawa, Hideki Takasu, Makoto Sakamoto, Kumi Higuchi, Keisuke Miyajima, Satoshi Yamada, Masaaki Motoyama, Yutaka Kojima, Koichi Yasumura, Takeshi Kodama, Shun Otsuji, Keizo Kan, Takumi Sumida
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Patent number: 8188277Abstract: The present invention provides a novel compound, which has an excellent effect of suppressing the generation of collagen and less side effects, with being excellent in terms of safety. The compound of the present invention is represented by the following general formula (1): [wherein X1 represents a nitrogen atom or a group —CH?; R1 represents a group —Z—R6, wherein Z represents a group —CO—, a group —CH(OH)—, or the like, and R6 represents a 5- to 15-membered monocyclic, dicyclic, or tricyclic, saturated or unsaturated heterocyclic group having 1 to 4 nitrogen atoms, oxygen atoms, or sulfur atoms; R2 represents a hydrogen atom, a halogen atom or a lower alkylene group; Y represents a group —O—, a group —CO—, a group —CH(OH)—, a lower alkylene group, or the like; and A represents a group or the like, wherein R3 represents a hydrogen atom, a lower alkoxy group, or the like, p represents 1 or 2, and R4 represents an imidazolyl lower alkyl group or the like.Type: GrantFiled: August 3, 2005Date of Patent: May 29, 2012Assignee: Otsuka Pharmaceutical Co., Ltd.Inventors: Tae Fukushima, Shuji Matsumura, Noriaki Takemura, Hideaki Satou, Nobuaki Ito, Takuya Shitsuta, Hironori Tsutsui, Michinori Tanaka, Keizo Kan, Hitoshi Nagao, Kenji Watanabe, Kuninori Tai, Takashi Nakagawa, Hideki Takasu, Makoto Sakamoto, Keisuke Miyajima, Satoshi Yamada, Yutaka Kojima, Koichi Yasumura, Naoto Ohi, Mitsuhiro Okuno, Kazuhisa Sugiyama, Kunihiko Kiyono, Takashi Suzuki, Seiji Akamatsu, Takeshi Kodama, Yasuo Yanagihara, Takumi Sumida
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Publication number: 20100261720Abstract: 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: ApplicationFiled: October 29, 2008Publication date: October 14, 2010Applicant: 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
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Publication number: 20100004438Abstract: An object of the present invention is to provide a medicinal drug much improved in anti tumor activity and excellent in safety. According to the present invention, there is provided a medicinal drug containing a compound represented by the following general formula (1) or a salt thereof as an active ingredient: [Formula 1] wherein X1 represents a nitrogen atom or a group —CH?, R1 represents a group -Z-R6, in which Z represents a group —CO—, a group —CH(OH)— or the like, R6 represents a 5- to 15-membered monocyclic, dicyclic or tricyclic saturated or unsaturated heterocyclic group having 1 to 4 nitrogen atoms, oxygen atoms or sulfur atoms, R2 represents a hydrogen atom or a halogen atom, Y represents a group —O—, a group —CO—, a group —CH(OH)— or a lower alkylene group, and A represents [Formula 2] wherein R3 represents a hydrogen atom, a lower alkoxy group or the like, p represents 1 or 2, R4 represents an imidazolyl lower alkyl group or the like.Type: ApplicationFiled: December 4, 2006Publication date: January 7, 2010Inventors: Hironori Matsuyama, Kenji Ohnishi, Takashi Nakagawa, Hideki Takasu, Makoto Sakamoto, Kumi Higuchi, Keisuke Miyajima, Satoshi Yamada, Masaaki Motoyama, Yutaka Kojima, Koichi Yasumura, Takeshi Kodama, Shun Otsuji, Keizo Kan, Takumi Sumida
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Publication number: 20070270422Abstract: The present invention provides a novel compound, which has an excellent effect of suppressing the generation of collagen and less side effects, with being excellent in terms of safety. The compound of the present invention is represented by the following general formula (1): [wherein X1 represents a nitrogen atom or a group —CH?; R1 represents a group -Z-R6, wherein Z represents a group —CO—, a group —CH(OH)—, or the like, and R6 represents a 5- to 15-membered monocyclic, dicyclic, or tricyclic, saturated or unsaturated heterocyclic group having 1 to 4 nitrogen atoms, oxygen atoms, or sulfur atoms; R2 represents a hydrogen atom, a halogen atom or a lower alkylene group; Y represents a group —O—, a group —CO—, a group —CH(OH)—, a lower alkylene group, or the like; and A represents a group or the like, wherein R3 represents a hydrogen atom, a lower alkoxy group, or the like, p represents 1 or 2, and R4 represents an imidazolyl lower alkyl group or the like.Type: ApplicationFiled: August 3, 2005Publication date: November 22, 2007Inventors: Tae Fukushima, Shuji Matsumura, Noriaki Takemura, Hideaki Satou, Nobuaki Ito, Takuya Shitsuta, Hironori Tsutsui, Michinori Tanaka, Keizo Kan, Hitoshi Nagao, Kenji Watanabe, Kuninori Tai, Takashi Nakagawa, Hideki Takasu, Makoto Sakamoto, Keisuke Miyajima, Satoshi Yamada, Yutaka Kojima, Koichi Yasumura, Naoto Ohi, Mitsuhiro Okuno, Kazuhisa Sugiyama, Kunihiko Kiyono, Takashi Suzuki, Seiji Akamatsu, Takeshi Kodama, Yasuo Yanagihara, Takumi Sumida
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Patent number: 6642223Abstract: A benzoheterocyclic derivative of the following formula [1]: and pharmaceutically acceptable salts thereof, which show excellent anti-vasopressin activity, vasopressin agonistic activity and oxytocin antagonistic activity, and are useful as a vasopressin antagonist, vasopressin agonist or oxytocin antagonist.Type: GrantFiled: June 6, 2001Date of Patent: November 4, 2003Assignee: Otsuka Pharmaceutical Co., Ltd.Inventors: Hidenori Ogawa, Kazumi Kondo, Hiroshi Yamashita, Keizo Kan, Takayuki Matsuzaki, Tomoichi Shinohara, Yoshihisa Tanada, Muneaki Kurimura, Michiaki Tominaga, Yoichi Yabuuchi
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Publication number: 20020049194Abstract: A benzoheterocyclic derivative of the following formula [1]: 1Type: ApplicationFiled: June 6, 2001Publication date: April 25, 2002Inventors: Hidenori Ogawa, Kazumi Kondo, Hiroshi Yamashita, Keizo Kan, Takayuki Matsuzaki, Tomoichi Shinohara, Yoshihisa Tanada, Muneaki Kurimura, Michiaki Tominaga, Yoichi Yabuuchi
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Patent number: 6335327Abstract: A benzoheterocyclic derivative of the following formula [1]: and pharmaceutically acceptable salts thereof, which show excellent anti-vasopressin activity, vasopressin agonistic activity and oxytocin antagonistic activity, and are useful as a vasopressin antagonist, vasopressin agonist or oxytocin antagonist.Type: GrantFiled: November 1, 1999Date of Patent: January 1, 2002Assignee: Otsuka Pharmaceuticals Co., Ltd.Inventors: Hidenori Ogawa, Kazumi Kondo, Hiroshi Yamashita, Keizo Kan, Takayuki Matsuzaki, Tomoichi Shinohara, Yoshihisa Tanada, Muneaki Kurimura, Michiaki Tominaga, Yoichi Yabuuchi
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Patent number: 6096736Abstract: Novel benzazepine derivative of the formula [1]: ##STR1## wherein R.sup.1 is H or halogen, A is lower alkylene, R.sup.2 and R.sup.3 are the same or different and each H, lower alkoxy, lower alkyl having optionally a lower alkoxy substituent, etc., or R.sup.2 and R.sup.3 may combine together with the nitrogen to which they bond to form a 5- to 7-membered saturated heterocyclic group which may optionally be substituted by a lower alkyl, etc., R.sup.4 is H, lower alkyl, OH, etc., R.sup.5 is --NHR.sup.6 (R.sup.6 is lower alkyl) or pyrrolidinyl, or a salt thereof, which show excellent anti-vasopressin activity, oxytocin antagonistic activity and vasopressin agonistic activity, and are useful as a vasopressin antagonist, a vasopressin agonist and an oxytocin antagonist.Type: GrantFiled: June 12, 1998Date of Patent: August 1, 2000Assignee: Otsuka Pharmaceutical Company, LimitedInventors: Hidenori Ogawa, Kazumi Kondo, Tomoichi Shinohara, Keizo Kan, Yoshihisa Tanada, Muneaki Kurimura, Seiji Morita, Minoru Uchida, Toyoki Mori, Michiaki Tominaga, Yoichi Yabuuchi
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Patent number: 6096735Abstract: A benzoheterocyclic derivative of the following formula [1]: ##STR1## and pharmaceutically acceptable salts thereof, which show excellent anti-vasopressin activity, vasopressin agonistic activity and oxytocin antagonistic activity, and are useful as a vasopressin antagonist, vasopressin agonist or oxytocin antagonist.Type: GrantFiled: November 13, 1996Date of Patent: August 1, 2000Assignee: Otsuka Pharmaceutical Company, LimitedInventors: Hidenori Ogawa, Kazumi Kondo, Hiroshi Yamashita, Keizo Kan, Takayuki Matsuzaki, Tomoichi Shinohara, Yoshihisa Tanada, Muneaki Kurimura, Michiaki Tominaga, Yoichi Yabuuchi