Patents by Inventor Takeshi Koami
Takeshi Koami 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: 8461329Abstract: A compound represented by formula (I) or a pharmaceutically acceptable salt thereof has an effect of inhibiting CRTH2 and, therefore, is useful as a preventive or a remedy for allergic diseases such as asthma, atopic dermatitis and allergic rhinitis.Type: GrantFiled: December 25, 2009Date of Patent: June 11, 2013Assignee: Taisho Pharmaceutical Co., Ltd.Inventors: Tetsuo Takayama, Hajime Asanuma, Daisuke Wakasugi, Rie Nishikawa, Yoshinori Sekiguchi, Madoka Kawamura, Naoya Ono, Tetsuya Yabuuchi, Takahiro Oi, Yusuke Oka, Shoichi Kuroda, Fumito Uneuchi, Takeshi Koami
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Publication number: 20110288293Abstract: A compound represented by formula (I) or a pharmaceutically acceptable salt thereof has an effect of inhibiting CRTH2 and, therefore, is useful as a preventive or a remedy for allergic diseases such as asthma, atopic dermatitis and allergic rhinitis.Type: ApplicationFiled: December 25, 2009Publication date: November 24, 2011Applicant: TAISHO PHARMACEUTICAL CO., LTD.Inventors: Tetsuo Takayama, Hajime Asanuma, Daisuke Wakasugi, Rie Nishikawa, Yoshinori Sekiguchi, Madoka Kawamura, Naoya Ono, Tetsuya Yabuuchi, Takahiro Oi, Yusuke Oka, Shoichi Kuroda, Fumito Uneuchi, Takeshi Koami
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Patent number: 8030499Abstract: It is intended to provide a drug which is efficacious against pathological conditions relating to arginine-vasopressin V1b receptor. More particularly speaking, it is intended to provide a drug which has a therapeutic or preventive effect on depression, anxiety, Alzheimer's disease, Parkinson's disease, Huntington's chorea, eating disorders, hypertension, digestive diseases, drug addiction, epilepsy, brain infarction, brain ischemia, brain edema, head injury, inflammation, immune diseases, alopecia and so on. As the results of intensive studies, a novel 1,3-dihydro-2H-indol-2-one compound and a pyrrolidin-2-one compound fused with a heteroaromatic ring, which are highly selective antagonists of arginine-vasopressin V1b receptor, have high metabolic stabilities and show favorable brain penetration and high plasma concentrations, are found, thereby achieving the above objective.Type: GrantFiled: January 30, 2006Date of Patent: October 4, 2011Assignee: Taisho Pharmaceutical Co., Ltd.Inventors: Yoshinori Sekiguchi, Takeshi Kuwada, Masato Hayashi, Dai Nozawa, Yuri Amada, Tsuyoshi Shibata, Shuji Yamamoto, Hiroshi Ohta, Taketoshi Okubo, Takeshi Koami
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Patent number: 7994204Abstract: The present invention aims to provide compounds which have an inhibitory effect on the binding between S1P and its receptor Edg-1(S1P1) and which are useful for pharmaceutical purposes. A compound represented by formula (I) or a pharmaceutically acceptable salt thereof: [wherein Ar represents a monocyclic heterocyclic ring containing one or two nitrogen atoms, A represents an oxygen atom or the like, Y1, Y2 and Y3 each represent a carbon atom or a nitrogen atom, R1 represents a hydrogen atom, a C1-C6 alkyl group or the like, R2 represents a C1-C6 alkyl group, a C3-C8 cycloalkyl group or the like, R3 represents a C1-C18 alkyl group or the like, R4 represents a hydrogen atom or a C1-C6 alkyl group, and R5 represents a C1-C10 alkyl group or the like].Type: GrantFiled: February 6, 2007Date of Patent: August 9, 2011Assignee: Taisho Pharmaceutical Co., LtdInventors: Naoya Ono, Tetsuo Takayama, Fumiyasu Shiozawa, Hironori Katakai, Tetsuya Yabuuchi, Tomomi Ota, Takeshi Koami, Rie Nishikawa
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Publication number: 20100216787Abstract: A thiazolylimidazole derivative represented by the formula or a pharmaceutically acceptable salt thereof, and an ALK5 inhibitor, an therapeutic agent for alopecia or a hair growth agent having the above as an active ingredient, wherein: X1 and X2 are different from each other and represent a sulfur atom or a carbon atom; R1 represents a phenyl group; a substituted phenyl group; a phenyl group condensed with a hetero aromatic ring; a pyridyl group; or a pyridyl group condensed with a hetero aromatic ring; R2 represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, an alkyl group having 1 to 6 carbon atoms substituted with 1 to 5 halogen atoms, an alkoxy group having 1 to 6 carbon atoms, an alkanoyl group having 1 to 5 carbon atoms, or a hydroxyalkyl group having 1 to 6 carbon atoms, A represents a group which is represented by the formula.Type: ApplicationFiled: December 22, 2009Publication date: August 26, 2010Applicant: TAISHO PHARMACEUTICAL CO., LTD.Inventors: Masakazu Sato, Yuko Matsunaga, Hajime Asanuma, Hideaki Amada, Takeshi Koami, Tetsuo Takayama, Tetsuya Yabuuchi, Fumiyasu Shiozawa, Hironori Katakai, Hiroki Umemiya, Akiko Ikeda
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Patent number: 7678810Abstract: A thiazolylimidazole derivative represented by the formula or a pharmaceutically acceptable salt thereof, and an ALK5 inhibitor, an therapeutic agent for alopecia or a hair growth agent having the above as an active ingredient, wherein: X1 and X2 are different from each other and represent a sulfur atom or a carbon atom; R1 represents a phenyl group; a substituted phenyl group; a phenyl group condensed with a hetero aromatic ring; a pyridyl group; or a pyridyl group condensed with a hetero aromatic ring; R2 represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, an alkyl group having 1 to 6 carbon atoms substituted with 1 to 5 halogen atoms, an alkoxy group having 1 to 6 carbon atoms, an alkanoyl group having 1 to 5 carbon atoms, or a hydroxyalkyl group having 1 to 6 carbon atoms, A represents a group which is represented by the formula.Type: GrantFiled: March 4, 2005Date of Patent: March 16, 2010Assignee: Taisho Pharmaceutical Co., LtdInventors: Masakazu Sato, Yuko Matsunaga, Hajime Asanuma, Hideaki Amada, Takeshi Koami, Tetsuo Takayama, Tetsuya Yabuuchi, Fumiyasu Shiozawa, Hironori Katakai, Hiroki Umemiya, Akiko Ikeda
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Publication number: 20090182144Abstract: The present invention aims to provide compounds which have an inhibitory effect on the binding between S1P and its receptor Edg-1(S1P1) and which are useful for pharmaceutical purposes. A compound represented by formula (I) or a pharmaceutically acceptable salt thereof: [wherein Ar represents a monocyclic heterocyclic ring containing one or two nitrogen atoms, A represents an oxygen atom or the like, Y1, Y2 and Y3 each represent a carbon atom or a nitrogen atom, R1 represents a hydrogen atom, a C1-C6 alkyl group or the like, R2 represents a C1-C6 alkyl group, a C3-C8 cycloalkyl group or the like, R3 represents a C1-C18 alkyl group or the like, R4 represents a hydrogen atom or a C1-C6 alkyl group, and R5 represents a C1-C10 alkyl group or the like].Type: ApplicationFiled: February 6, 2007Publication date: July 16, 2009Applicant: Taisho Pharmaceutical Co., Ltd.Inventors: Naoya Ono, Tetsuo Takayama, Fumiyasu Shiozawa, Hironori Katakai, Tetsuya Yabuuchi, Tomomi Ota, Takeshi Koami, Rie Nishikawa
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Publication number: 20080318923Abstract: It is intended to provide a drug which is efficacious against pathological conditions relating to arginine-vasopressin V1b receptor. More particularly speaking, it is intended to provide a drug which has a therapeutic or preventive effect on depression, anxiety, Alzheimer's disease, Parkinson's disease, Huntington's chorea, eating disorders, hypertension, digestive diseases, drug addiction, epilepsy, brain infarction, brain ischemia, brain edema, head injury, inflammation, immune diseases, alopecia and so on. As the results of intensive studies, a novel 1,3-dihydro-2H-indol-2-one compound and a pyrrolidin-2-one compound fused with a heteroaromatic ring, which are highly selective antagonists of arginine-vasopressin V1b receptor, have high metabolic stabilities and show favorable brain penetration and high plasma concentrations, are found, thereby achieving the above objective.Type: ApplicationFiled: January 30, 2006Publication date: December 25, 2008Applicant: TAISHO PHARMACEUTICAL CO., LTD.Inventors: Yoshinori Sekiguchi, Takeshi Kuwada, Masato Hayashi, Dai Nozawa, Yuri Amada, Tsuyoshi Shibata, Shuji Yamamoto, Hiroshi Ohta, Taketoshi Okubo, Takeshi Koami
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Publication number: 20070154428Abstract: A thiazolylimidazole derivative represented by the formula or a pharmaceutically acceptable salt thereof, and an ALK5 inhibitor, an therapeutic agent for alopecia or a hair growth agent having the above as an active ingredient, wherein: X1 and X2 are different from each other and represent a sulfur atom or a carbon atom; R1 represents a phenyl group; a substituted phenyl group; a phenyl group condensed with a hetero aromatic ring; a pyridyl group; or a pyridyl group condensed with a hetero aromatic ring; R2 represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, an alkyl group having 1 to 6 carbon atoms substituted with 1 to 5 halogen atoms, an alkoxy group having 1 to 6 carbon atoms, an alkanoyl group having 1 to 5 carbon atoms, or a hydroxyalkyl group having 1 to 6 carbon atoms, A represents a group which is represented by the formula.Type: ApplicationFiled: March 4, 2005Publication date: July 5, 2007Applicant: TAISHO PHARMACEUTICAL CO., LTD.Inventors: Masakazu Sato, Yuko Matsunaga, Hajime Asanuma, Hideaki Amada, Takeshi Koami, Tetsuo Takayama, Tetsuya Yabuuchi, Fumiyasu Shiozawa, Hironori Katakai, Hiroki Umemiya, Akiko Ikeda