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).
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Patent number: 10479780Abstract: 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: GrantFiled: June 17, 2016Date of Patent: November 19, 2019Assignees: Chugai Seiyaku Kabushiki Kaisha, F. Hoffmann-La Roche AGInventors: Hirosato Ebiike, Toshihiro Aoki, Takashi Chiba, Masami Kochi, Kimitaka Nakama, Satoshi Niizuma, Hiroki Nishii, Jun Ohwada, Hiroyuki Shimamura, Aiko Suge, Yoshito Nakanishi, Natsuki Kobayashi
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Publication number: 20180362509Abstract: 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: ApplicationFiled: June 17, 2016Publication date: December 20, 2018Applicants: Chugai Seiyaku Kabushiki Kaisha, F. Hoffmann-La Roche AGInventors: Hirosato Ebiike, Toshihiro Aoki, Takashi Chiba, Masami Kochi, Kimitaka Nakama, Satoshi Niizuma, Hiroki Nishii, Jun Ohwada, Hiroyuki Shimamura, Aiko Suge, Yoshito Nakanishi, Natsuki Kobayashi
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Patent number: 10005739Abstract: The present invention relates to quinazolinone and isoquinolinone derivatives represented by formula (I) or pharmaceutically acceptable salts thereof.Type: GrantFiled: October 23, 2014Date of Patent: June 26, 2018Assignee: CHUGAI SEIYAKU KABUSHIKI KAISHAInventors: Takeshi Murata, Sousuke Hara, Satoshi Niizuma, Kihito Hada, Hatsuo Kawada, Masahiro Sakaitani, Hideaki Shimada, Yoshito Nakanishi
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Patent number: 9695118Abstract: The present invention relates to benzamide derivatives represented by formula (I) or pharmaceutically acceptable salts thereof.Type: GrantFiled: April 24, 2013Date of Patent: July 4, 2017Assignee: Chugai Seiyaku Kabushiki KaishaInventors: Takeshi Murata, Satoshi Niizuma, Sousuke Hara, Hatsuo Kawada, Kihito Hada, Hideaki Shimada, Hiroshi Tanaka, Yoshito Nakanishi
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Patent number: 9567304Abstract: The present invention relates to quinazolinedione derivatives represented by formula (I) or pharmaceutically acceptable salts thereof.Type: GrantFiled: April 24, 2013Date of Patent: February 14, 2017Assignee: Chugai Seiyaku Kabushiki KaishaInventors: Takeshi Murata, Hatsuo Kawada, Satoshi Niizuma, Sousuke Hara, Kihito Hada, Hideaki Shimada, Hiroshi Tanaka, Toshiyuki Mio
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Publication number: 20160272595Abstract: The present invention relates to quinazolinone and isoquinolinone derivatives represented by formula (I) or pharmaceutically acceptable salts thereof.Type: ApplicationFiled: October 23, 2014Publication date: September 22, 2016Applicant: CHUGAI SEIYAKU KABUSHIKI KAISHAInventors: Takeshi MURATA, Sousuke HARA, Satoshi NIIZUMA, Kihito HADA, Hatsuo KAWADA, Masahiro SAKAITANI, Hideaki SHIMADA, Yoshito NAKANISHI
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Publication number: 20150152047Abstract: The present invention relates to benzamide derivatives represented by formula (I) or pharmaceutically acceptable salts thereof.Type: ApplicationFiled: April 24, 2013Publication date: June 4, 2015Inventors: Takeshi Murata, Satoshi Niizuma, Sousuke Hara, Hatsuo Kawada, Kihito Hada, Hideaki Shimada, Hiroshi Tanaka, Yoshito Nakanishi
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Publication number: 20150141400Abstract: The present invention relates to quinazolinedione derivatives represented by formula (I) or pharmaceutically acceptable salts thereof.Type: ApplicationFiled: April 24, 2013Publication date: May 21, 2015Inventors: Takeshi Murata, Hatsuo Kawada, Satoshi Niizuma, Sousuke Hara, Kihito Hada, Hideaki Shimada, Hiroshi Tanaka, Toshiyuki Mio
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Patent number: 8143274Abstract: 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: GrantFiled: February 7, 2005Date of Patent: March 27, 2012Assignee: Chugai Seiyaku Kabushiki KaishaInventors: Kazuo Hattori, Satoshi Niizuma, Takehiro Okada, Hiroyuki Eda, Kenji Tatsuno, Miyuki Yoshida
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Patent number: 7820693Abstract: 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: GrantFiled: February 22, 2006Date of Patent: October 26, 2010Assignee: Chugai Seiyaku Kabushiki KaishaInventors: Kazuo Hattori, Satoshi Niizuma, Miyako Masubuchi, Kohei Koyama, Osamu Kondoh, Toshiyuki Tsukaguchi, Takehiro Okada
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Publication number: 20090326225Abstract: 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: ApplicationFiled: August 25, 2009Publication date: December 31, 2009Applicant: Chugai Seiyaku Kabushiki KaishaInventors: Hiroshi Fukuda, Takeshi Murata, Satoshi Niizuma, Hitomi Suda, Masao Tsukazaki
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Publication number: 20090312554Abstract: 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: ApplicationFiled: August 25, 2009Publication date: December 17, 2009Applicant: Chugai Seiyaku Kabushiki KaishaInventors: HIROSHI FUKUDA, TAKESHI MURATA, SATOSHI NIIZUMA, HITOMI SUDA, MASAO TSUKAZAKI
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Patent number: 7595400Abstract: 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: GrantFiled: February 20, 2004Date of Patent: September 29, 2009Assignee: Chugai Seiyaku Kabushiki KaishaInventors: Hiroshi Fukuda, Takeshi Murata, Satoshi Niizuma, Hitomi Suda, Masao Tsukazaki
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Publication number: 20090030195Abstract: 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: ApplicationFiled: February 22, 2006Publication date: January 29, 2009Applicant: Chugai Seiyaku Kabushiki KaishaInventors: Kazuo Hattori, Satoshi Niizuma, Miyako Masubuchi, Kohei Koyama, Osamu Kondoh, Toshiyuki Tsukaguchi, Takehiro Okada
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Publication number: 20070185160Abstract: 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: ApplicationFiled: February 7, 2005Publication date: August 9, 2007Applicant: CHUGAI SEIYAKU KABUSHIKI KAISHAInventors: Kazuo Hattori, Satoshi Niizuma, Takehiro Okada, Hiroyuki Eda, Kenji Tatsuno, Miyuki Yoshida
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Patent number: 7109195Abstract: 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: GrantFiled: September 16, 2004Date of Patent: September 19, 2006Assignee: Chugai Seiyaku Kabushiki KaishaInventors: Takeshi Murata, Satoshi Niizuma, Nobuo Shimma, Hitomi Suda, Masao Tsukazaki
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Publication number: 20050059679Abstract: 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: ApplicationFiled: September 16, 2004Publication date: March 17, 2005Inventors: Takeshi Murata, Satoshi Niizuma, Nobuo Shimma, Hitomi Suda, Masao Tsukazaki
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Patent number: 6825194Abstract: 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: GrantFiled: November 26, 2002Date of Patent: November 30, 2004Assignee: Chugai Seiyaku Kabushiki KaishaInventors: Takeshi Murata, Satoshi Niizuma, Nobuo Shimma, Hitomi Suda, Masao Tsukazaki
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Publication number: 20030144304Abstract: The present invention relates to hexacyclic compound of the formula [1], 1Type: ApplicationFiled: November 26, 2002Publication date: July 31, 2003Inventors: Takeshi Murata, Satoshi Niizuma, Nobuo Shimma, Hitomi Suda, Masao Tsukazaki