Patents by Inventor Tadashi Nagakura
Tadashi Nagakura 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: 8163787Abstract: A compound represented by the following general formula (1) or salts thereof or hydrates of the foregoing: wherein R1a, R1b, R1c and R1d each independently represent hydrogen, etc.; R2 represents optionally substituted phenyl, etc.; R3 represents optionally substituted C6-10 aryl, etc.; and Z1 and Z2 each independently represent hydrogen.Type: GrantFiled: January 13, 2011Date of Patent: April 24, 2012Assignee: Eisai R&D Management Co., Ltd.Inventors: Richard Clark, Fumiyoshi Matsuura, Kazunobu Kira, Shinsuke Hirota, Hiroshi Azuma, Tadashi Nagakura, Tatsuo Horizoe, Kimiyo Tabata, Kazutomi Kusano, Takao Omae, Atsushi Inoue
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Publication number: 20110112109Abstract: A compound represented by the following general formula (1) or salts thereof or hydrates of the foregoing: wherein R1a, R1b, R1c and R1d each independently represent hydrogen, etc.; R2 represents optionally substituted phenyl, etc.; R3 represents optionally substituted C6-10 aryl, etc.; and Z1 and Z2 each independently represent hydrogen.Type: ApplicationFiled: January 13, 2011Publication date: May 12, 2011Inventors: Richard CLARK, Fumiyoshi Matsuura, Kazunobu Kira, Shinsuke Hirota, Hiroshi Azuma, Tadashi Nagakura, Tatsuo Horizoe, Kimiyo Tabata, Kazutomi Kusano, Takao Omae, Atsushi Inoue
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Patent number: 7928228Abstract: A Compound represented by the following general formula (1): wherein R1a, R1b, R1c and R1d each independently represent hydrogen, etc.; R2 represents optionally substituted phenyl, etc.; R3 represents optionally substituted C6-10 aryl, etc.; and Z1 and Z2 each independently represent hydrogen or salts thereof or hydrates of the foregoing.Type: GrantFiled: March 29, 2010Date of Patent: April 19, 2011Assignees: Eisai Co., Ltd., Eisai R&D Management Co., Ltd.Inventors: Richard Clark, Fumiyoshi Matsuura, Kazunobu Kira, Shinsuke Hirota, Hiroshi Azuma, Tadashi Nagakura, Tatsuo Horizoe, Kimiyo Tabata, Kazutomi Kusano, Takao Omae, Atsushi Inoue
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Patent number: 7816522Abstract: A Compound represented by the following general formula (1), salts thereof or hydrates of the foregoing is a novel compound useful for treatment and/or prevention of diseases associated with thrombus formation, and which is safer with suitable physicochemical stability. [wherein R1a, R1b, R1c and R1d each independently represent hydrogen, etc.; R2 represents optionally substituted phenyl, etc.; R3 represents optionally substituted C6-10 aryl, etc.Type: GrantFiled: March 22, 2007Date of Patent: October 19, 2010Assignee: Eisai Co., Ltd.Inventors: Richard Clark, Fumiyoshi Matsuura, Kazunobu Kira, Shinsuke Hirota, Hiroshi Azuma, Tadashi Nagakura, Tatsuo Horizoe, Kimiyo Tabata, Kazutomi Kusano, Takao Omae, Atsushi Inoue
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Patent number: 7807690Abstract: A compound represented by the following general formula (1), or a salt thereof has serine protease inhibiting activity, and particularly excellent inhibiting activity against clotting factor VIIa. This compound or a salt thereof is useful as therapeutic and/or prophylactic agents for diseases associated with thrombus formation. [wherein R1 represents hydrogen, R2 represents optionally substituted phenyl, etc., R3 represents optionally substituted C6-10 aryl, etc.].Type: GrantFiled: September 19, 2008Date of Patent: October 5, 2010Assignee: Eisai R&D Management Co., Ltd.Inventors: Richard Clark, Atsushi Takemura, Nobuhisa Watanabe, Osamu Asano, Tadashi Nagakura, Kimiyo Tabata
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Publication number: 20100240654Abstract: A compound represented by the following general formula (1) or a salt thereof or a hydrate of the foregoing is safe while exhibiting suitable physicochemical stability, and is useful as therapeutic or prophylactic agents for diseases associated with thrombus formation. wherein R1a, R1b, R1c and R1d each independently represent hydrogen, etc., R2 represents optionally substituted phenyl, etc., R3 represents optionally substituted C6-10 aryl, etc., Z1, Z2 and Z3 each independently represent hydrogen, etc., Z4 represents hydrogen, etc. and X represents a single bond or —CO—, etc.Type: ApplicationFiled: June 1, 2010Publication date: September 23, 2010Inventors: Richard CLARK, Shinsuke HIROTA, Hiroshi AZUMA, Kazunobu KIRA, Nobuhisa WATANABE, Tadashi NAGAKURA, Tatsuo HORIZOE
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Patent number: 7772226Abstract: The present invention is related to compounds represented by the following formula, or salts or hydrates thereof wherein, T1 represents a 4- to 12-membered heterocyclic group containing one or two nitrogen atoms in the ring, which is a monocyclic or bicyclic structure that may have one or more substituents; X represents a C1-6 alkyl group which may have one or more substituents, or such; Z1 and Z2 each independently represent a nitrogen atom or a group represented by the formula —CR2—; R1 and R2 independently represent a hydrogen atom, a C1-6 alkyl group which may have one or more substituents, or a C1-6 alkoxy group which may have one or more substituents, or such. These are novel compounds that exhibit an excellent DPPIV-inhibiting activity.Type: GrantFiled: August 28, 2008Date of Patent: August 10, 2010Assignee: Eisai R&D Management Co., Ltd.Inventors: Seiji Yoshikawa, Eita Emori, Fumiyoshi Matsuura, Richard Clark, Hironori Ikuta, Kazunobu Kira, Nobuyuki Yasuda, Tadashi Nagakura, Kazuto Yamazaki
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Publication number: 20100190783Abstract: A Compound represented by the following general formula (1): wherein R1a, R1b, R1c and R1d each independently represent hydrogen, etc.; R2 represents optionally substituted phenyl, etc.; R3 represents optionally substituted C6-10 aryl, etc.; and Z1 and Z2 each independently represent hydrogen or salts thereof or hydrates of the foregoing.Type: ApplicationFiled: March 29, 2010Publication date: July 29, 2010Inventors: Richard CLARK, Fumiyoshi MATSUURA, Kazunobu KIRA, Shinsuke HIROTA, Hiroshi AZUMA, Tadashi NAGAKURA, Tatsuo HORIZOE, Kimiyo TABATA, Kazutomi KUSANO, Takao OMAE, Atsushi INOUE
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Publication number: 20100184981Abstract: A compound represented by the following general formula (1), or a salt thereof, has serine protease inhibiting activity, and particularly excellent inhibiting activity against clotting factor VIIa. This compound or a salt thereof is useful as therapeutic and/or prophylactic agents for diseases associated with thrombus formation. wherein R1 represents hydrogen, R2 represents optionally substituted phenyl, etc., R3 represents optionally substituted C6-10 aryl, etc.Type: ApplicationFiled: January 15, 2010Publication date: July 22, 2010Inventors: Richard Clark, Atsushi Takemura, Nobuhisa Watanabe, Osamu Asano, Tadashi Nagakura, Kimiyo Tabata
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Publication number: 20090270433Abstract: A compound represented by the following general formula (1), or a salt thereof has serine protease inhibiting activity, and particularly excellent inhibiting activity against clotting factor VIIa. This compound or a salt thereof is useful as therapeutic and/or prophylactic agents for diseases associated with thrombus formation. [wherein R1 represents hydrogen, R2 represents optionally substituted phenyl, etc., R3 represents optionally substituted C6-10 aryl, etc.Type: ApplicationFiled: September 19, 2008Publication date: October 29, 2009Applicant: Eisai R&D Management Co., Ltd.Inventors: Richard Clark, Atsushi Takemura, Nobuhisa Watanabe, Osamu Asano, Tadashi Nagakura, Kimlyo Tabata
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Publication number: 20090018331Abstract: The present invention is related to compounds represented by the following formula, or salts or hydrates thereof wherein, T1 represents a 4- to 12-membered heterocyclic group containing one or two nitrogen atoms in the ring, which is a monocyclic or bicyclic structure that may have one or more substituents; X represents a C1-6 alkyl group which may have one or more substituents, or such; Z1 and Z2 each independently represent a nitrogen atom or a group represented by the formula —CR2—; R1 and R2 independently represent a hydrogen atom, a C1-6 alkyl group which may have one or more substituents, or a C1-6 alkoxy group which may have one or more substituents, or such. These are novel compounds that exhibit an excellent DPPIV-inhibiting activity.Type: ApplicationFiled: August 28, 2008Publication date: January 15, 2009Applicant: Eisai R&D Management Co., Ltd.Inventors: Seiji Yoshikawa, Eita Emori, Fumiyoshi Matsuura, Richard Clark, Hironori Ikuta, Kazunobu Kira, Nobuyuki Yasuda, Tadashi Nagakura, Kazuto Yamazaki
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Publication number: 20080132507Abstract: A compound represented by the following general formula (1) or a salt thereof or a hydrate of the foregoing is safe while exhibiting suitable physicochemical stability, and is useful as therapeutic or prophylactic agents for diseases associated with thrombus formation. wherein R1a, R1b, R1c and R1d each independently represent hydrogen, etc., R2 represents optionally substituted phenyl, etc., R3 represents optionally substituted C6-10 aryl, etc., Z1, Z2 and Z3 each independently represent hydrogen, etc., Z4 represents hydrogen, etc. and X represents a single bond or —CO—, etc.Type: ApplicationFiled: October 13, 2005Publication date: June 5, 2008Applicant: Eisai R&D Management Co., Ltd.Inventors: Richard Clark, Shinsuke Hirota, Hiroshi Azuma, Kazunobu Kira, Nobuhisa Watanabe, Tadashi Nagakura, Tatsuo Horizoe
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Publication number: 20080015199Abstract: A Compound represented by the following general formula (1), salts thereof or hydrates of the foregoing is a novel compound useful for treatment and/or prevention of diseases associated with thrombus formation, and which is safer with suitable physicochemical stability. [wherein R1a, R1b, R1c and R1d each independently represent hydrogen, etc.; R2 represents optionally substituted phenyl, etc.; R3 represents optionally substituted C6-10 aryl, etc.Type: ApplicationFiled: March 22, 2007Publication date: January 17, 2008Applicant: Eisai R&D Management Co., Ltd.Inventors: Richard Clark, Fumiyoshi Matsuura, Kazunobu Kira, Shinsuke Hirota, Hiroshi Azuma, Tadashi Nagakura, Tatsuo Horizoe, Kimiyo Tabata, Kazutomi Kusano, Takao Omae, Atsushi Inoue
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Patent number: 7238720Abstract: The present invention relates to use of 1-carbamoylazole derivatives as medicaments and pharmaceutical compositions containing 1-carbamoylazole derivatives as the active ingredient, based on their DPPIV inhibiting effects.Type: GrantFiled: January 27, 2004Date of Patent: July 3, 2007Assignee: Eisai R & D Management Co. Ltd.Inventors: Nobuyuki Yasuda, Tadashi Nagakura, Kazuto Yamazaki, Seiji Yoshikawa, Toshimi Okada, Hironori Ikuta, Mika Koyanagi
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Patent number: 7074798Abstract: The present invention provides novel compounds exhibiting an excellent DPPIV inhibition effect. The compounds are represented by the formula: wherein, m is 0 or 1; n is 0; R31, R32, R33, R34, R35, R36, R37, R38, R39, R40, R41, and R42 each represent a hydrogen atom; X represents an alkynyl group, an aryl group, and such, which group may be substituted; and, R1 and R2 each independently represents a hydrogen atom, an alkyl group, an alkoxyl group, or such, or salts or hydrates thereof.Type: GrantFiled: February 24, 2003Date of Patent: July 11, 2006Assignee: Eisai Co., LtdInventors: Seiji Yoshikawa, Eita Emori, Fumiyoshi Matsuura, Richard Clark, Hironori Ikuta, Nobuyuki Yasuda, Tadashi Nagakura, Kazuto Yamazaki, Mika Aoki
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Publication number: 20060100199Abstract: The present invention is related to compounds represented by the following formula, or salts or hydrates thereof wherein, T1 represents a 4- to 12-membered heterocyclic group containing one or two nitrogen atoms in the ring, which is a monocyclic or bicyclic structure that may have one or more substituents; X represents a C1-6 alkyl group which may have one or more substituents, or such; Z1 and Z2 each independently represent a nitrogen atom or a group represented by the formula —CR2—; R1 and R2 independently represent a hydrogen atom, a C1-6 alkyl group which may have one or more substituents, or a C1-6 alkoxy group which may have one or more substituents, or such.Type: ApplicationFiled: June 3, 2003Publication date: May 11, 2006Inventors: Seiji Yoshikawa, Eita Emori, Eumiyoshi Matsuura, Richard Clark, Hironori Ikuta, Kazunobu Kira, Nobuyuki Yasuda, Tadashi Nagakura, Kazuto Yamazaki
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Publication number: 20060063787Abstract: The present invention is related to compounds represented by the following formula, or salts or hydrates thereof wherein, T1 represents a 4- to 12-membered heterocyclic group containing one or two nitrogen atoms in the ring, which is a monocyclic or bicyclic structure that may have one or more substituents; X represents a C1-6 alkyl group which may have one or more substituents, or such; Z1 and Z2 each independently represent a nitrogen atom or a group represented by the formula —CR2—; R1 and R2 independently represent a hydrogen atom, a C1-6 alkyl group which may have one or more substituents, or a C1-6 alkoxy group which may have one or more substituents, or such. These are novel compounds that exhibit an excellent DPPIV-inhibiting activity.Type: ApplicationFiled: August 26, 2005Publication date: March 23, 2006Applicant: Eisai Co., Ltd.Inventors: Seiji Yoshikawa, Eita Emori, Fumiyoshi Matsuura, Richard Clark, Hironori Ikuta, Kazunobu Kira, Nobuyuki Yasuda, Tadashi Nagakura, Kazuto Yamazaki
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Patent number: 6916837Abstract: Amidino derivatives represented by the following general formula (I): {where X is a group represented by R1SO2NR2— (wherein R1 represents optionally substituted C6-14 aryl, etc. and R2 represents hydrogen atom, etc.), etc., Ar1 represents 2,6-naphthylene, etc., R3 represents hydrogen atom, etc. and Y represents carboxyphenyl, etc.} and their pharmacologically acceptable salts or solvates.Type: GrantFiled: November 14, 2002Date of Patent: July 12, 2005Assignee: Eisai Co., Ltd.Inventors: Takashi Satoh, Yasushi Okamoto, Osamu Asano, Nobuhisa Watanabe, Tadashi Nagakura, Takao Saeki, Atsushi Inoue, Masahiro Sakurai
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Publication number: 20040186153Abstract: The present invention relates to use of 1-carbamoylazole derivatives as medicaments and pharmaceutical compositions containing 1-carbamoylazole derivatives as the active ingredient, based on their DPPIV inhibiting effects.Type: ApplicationFiled: January 27, 2004Publication date: September 23, 2004Inventors: Nobuyuki Yasuda, Tadashi Nagakura, Kazuto Yamazaki, Seiji Yoshikawa, Toshimi Okada, Hironori Ikuta, Mika Koyanagi
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Publication number: 20040116328Abstract: The present invention is related to compounds represented by the following formula, or salts or hydrates thereof 1Type: ApplicationFiled: June 6, 2003Publication date: June 17, 2004Applicant: Eisai Co., Ltd.Inventors: Seiji Yoshikawa, Eita Emori, Fumiyoshi Matsuura, Richard Clark, Hironori Ikuta, Kazunobu Kira, Nobuyuki Yasuda, Tadashi Nagakura, Kazuto Yamazaki