Patents by Inventor Takashi Kosasa
Takashi Kosasa 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: 9018260Abstract: Novel indansulfamide derivatives or a pharmaceutically acceptable salt thereof such as N-[(1S)-2,2,5,7-tetrafluoro-2,3-dihydro-1H-inden-1-yl]sulfamide, N-[(1S)-2,2,4,7-tetrafluoro-2,3-dihydro-1H-inden-1-yl]sulfamide, (+)-N-(2,2,4,6,7-pentafluoro-2,3-dihydro-1H-inden-1-yl)sulfamide, have an action of improving Seizure Severity Index (Score) in mice kindling model. Thus the compounds or the salt thereof are expected as a drug for treating epilepsy.Type: GrantFiled: June 17, 2013Date of Patent: April 28, 2015Assignee: Eisai R&D Management Co., Ltd.Inventors: Yuji Kazuta, Toru Watanabe, Keiichi Sorimachi, Minako Saito, Yoichi Kita, Toshiaki Tanaka, Hiroyuki Higashiyama, Takahisa Hanada, Tetsuyuki Teramoto, Takashi Kosasa, Yukio Ishikawa
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Publication number: 20140371319Abstract: Novel indansulfamide derivatives or a pharmaceutically acceptable salt thereof such as N-[(1S)-2,2,5,7-tetrafluoro-2,3-dihydro-1H-inden-1-yl]sulfamide, N-[(1S)-2,2,4,7-tetrafluoro-2,3-dihydro-1H-inden-1-yl]sulfamide, (+)-N-(2,2,4,6,7-pentafluoro-2,3-dihydro-1H-inden-1-yl)sulfamide, have an action of improving Seizure Severity Index (Score) in mice kindling model. Thus the compounds or the salt thereof are expected as a drug for treating epilepsy.Type: ApplicationFiled: June 17, 2013Publication date: December 18, 2014Applicant: Eisai R&D Management Co., Ltd.Inventors: Yuji Kazuta, Toru Watanabe, Keiichi Sorimachi, Minako Saito, Yoichi Kita, Toshiaki Tanaka, Hiroyuki Higashiyama, Takahisa Hanada, Tetsuyuki Teramoto, Takashi Kosasa, Yukio Ishikawa
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Publication number: 20090137629Abstract: A method for treatment of a mental disorder containing the step of administering a therapeutically effective amount of a sigma receptor binding agent containing an indanone compound represented by the following formula (I), a pharmacologically acceptable salt thereof or a hydrate of them. The variables of formula (I) are recited in the present specification.Type: ApplicationFiled: November 5, 2008Publication date: May 28, 2009Inventors: Yoichi Iimura, Takashi Kosasa, Yoshiharu Yamanishi
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Patent number: 7378425Abstract: The present invention provides an excellent sigma receptor binding agent and/or acetylcholinesterase inhibitor containing an (1-indanone)-(1,2,3,6-tetrahydropyridine) compound. More specifically, it provides an (1-indanone)-(1,2,3,6-tetrahydropyridine) compound represented by the following formula, a pharmacologically acceptable salt thereof or a hydrate thereof: In the formula (I), R1, R2, R3 and R4 are the same as or different from each other.Type: GrantFiled: September 15, 2004Date of Patent: May 27, 2008Assignee: Eisai R & D Management Co., Ltd.Inventors: Yoichi Iimura, Takashi Kosasa, Yoshiharu Yamanishi
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Patent number: 7091218Abstract: The present invention provides a novel compound having an excellent acetylcholinesterase inhibitory effect. That is, it provides a compound represented by formula: (wherein R1 and R2 represent substituents), a pharmacologically acceptable salt thereof or hydrates thereof.Type: GrantFiled: September 1, 2000Date of Patent: August 15, 2006Assignee: Eisai Co., Ltd.Inventors: Yoichi Iimura, Takashi Kosasa
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Patent number: 6906083Abstract: The present invention provides a novel compound having a superior acetylcholinesterase inhibitory action. It provides a compound represented by the formula: (In the formula, R1 represents a group represented by the formula: (wherein, R3, R4, R5 and R6 are the same as or different from each other and each represents a hydrogen atom, an optionally substituted C1-6 alkoxy group and the like; and m represents an integer from 0 to 6) and the like; and R2 represents a hydrogen atom, an optionally substituted C1-6 alkyl group, an optionally substituted C2-6 alkenyl group or an optionally substituted C2-6 alkynyl group), a salt thereof or a hydrate of them.Type: GrantFiled: June 21, 2001Date of Patent: June 14, 2005Assignee: Eisai Co., Ltd.Inventors: Yoichi Iimura, Takashi Kosasa
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Publication number: 20050124642Abstract: The present invention provides an excellent sigma receptor binding agent and/or acetylcholinesterase inhibitor containing an (1-indanone)-(1,2,3,6-tetrahydropyridine) compound. More specifically, it provides an (1-indanone)-(1,2,3,6-tetrahydropyridine) compound represented by the following formula, a pharmacologically acceptable salt thereof or a hydrate thereof: In the formula (I), R1, R2, R3 and R4 are the same as or different from each other.Type: ApplicationFiled: September 15, 2004Publication date: June 9, 2005Applicant: Eisai Co., Ltd.Inventors: Yoichi Iimura, Takashi Kosasa, Yoshiharu Yamanishi
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Publication number: 20050107432Abstract: The present invention provides an indanone derivative and an excellent sigma receptor binding agent comprising an indanone derivative. More specifically, it provides a sigma receptor binding agent comprising an indanone derivative represented by the following formula, a pharmacologically acceptable salt thereof or a hydrate of them.Type: ApplicationFiled: January 22, 2003Publication date: May 19, 2005Inventors: Yoichi Iimura, Takashi Kosasa, Yoshiharu Yamanishi
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Publication number: 20050026895Abstract: The present invention provides a novel compound having a superior acetylcholinesterase inhibitory action. It provides a compound represented by the formula: (In the formula, R1 represents a group represented by the formula: (wherein, R3, R4, R5 and R6 are the same as or different from each other and each represents a hydrogen atom, an optionally substituted C1-6 alkoxy group and the like; and m represents an integer from 0 to 6) and the like; and R2 represents a hydrogen atom, an optionally substituted C1-6 alkyl group, an optionally substituted C2-6 alkenyl group or an optionally substituted C2-6 alkynyl group), a salt thereof or a hydrate of them.Type: ApplicationFiled: September 1, 2004Publication date: February 3, 2005Inventors: Yoichi Iimura, Takashi Kosasa
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Patent number: 6706741Abstract: The present invention provides an excellent acetylcholinesterase inhibitor. That is, it provides an acetylcholinesterase inhibitor comprising a 1-benzylpyridinium salt represented by the following formula: wherein R1, R2, R3 and R4 are the same as or different from each other and each represents a hydrogen atom, a halogen atom, a hydroxyl group, a nitrile group, a C1-6 alkyl group, a C1-6 alkoxy group etc.; R5 represents a hydrogen atom, a halogen atom etc.; the partial structure: is a group represented by the formula >C(R6)—CH2— (wherein R6 is a hydrogen atom or a halogen atom) or >C═CH—; X− represents a halide ion or organic sulfonic acid ion; and m is 0 or an integer from 1 to 5.Type: GrantFiled: September 18, 2002Date of Patent: March 16, 2004Assignee: Eisai Co., Ltd.Inventors: Yoichi Iimura, Takashi Kosasa
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Patent number: 6677330Abstract: The present invention provides a novel compound having an excellent acetylcholinesterase inhibitory effect. That is, it provides a 4-substituted piperidine compound fluoride represented by the following formula, a pharmaceutically acceptable salt thereof or hydrates thereof (provided that 1-benzyl-4-[(5,6-dimethoxy-2-fluoro-1-indanon)-2-yl]methylpiperidine, a pharmaceutically acceptable salt thereof and hydrates thereof are excluded). wherein R1 and R2 represent substituents.Type: GrantFiled: August 30, 2001Date of Patent: January 13, 2004Assignee: Eisai Co., Ltd.Inventors: Yoichi Iimura, Takashi Kosasa, Yoshiharu Yamanishi, Hachiro Sugimoto, Yoshio Takeuchi, Tetsuo Shibata, Emiko Suzuki
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Publication number: 20030166925Abstract: The present invention provides a novel compound having a superior acetylcholinesterase inhibitory action.Type: ApplicationFiled: November 25, 2002Publication date: September 4, 2003Inventors: Yoichi Iimura, Takashi Kosasa
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Publication number: 20030069289Abstract: The present invention provides an excellent acetylcholinesterase inhibitor.Type: ApplicationFiled: September 18, 2002Publication date: April 10, 2003Inventors: Yoichi Iimura, Takashi Kosasa
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Patent number: 6277866Abstract: The present invention provides a novel compound useful as a medicament, an acetylcholinesterase inhibitor, and an agent for preventing, treating and improving various kinds of senile dementia, Alzheimer-type senile dementia, cerebrovascular dementia or attention deficit hyperactivity disorder, namely, 1-benzyl-4-[(5,6-dimethoxy-2-fluoro-1-indanone)-2-yl]methylpiperidine represented by the following formula: or a pharmaceutically acceptable salt thereof, and a process for producing the same.Type: GrantFiled: October 27, 1999Date of Patent: August 21, 2001Assignee: Eisai Co., Ltd.Inventors: Yoshio Takeuchi, Norio Shibata, Emiko Suzuki, Yoichi Iimura, Takashi Kosasa, Yoshiharu Yamanishi, Hachiro Sugimoto
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Patent number: 5919778Abstract: The cyclic amide derivative is defined by the formula (I) or a salt thereof: R1-(CH2)n-Z in which R1 is a group derived from a cyclic amide compound, substituted or unsubstituted, n is zero or an integer of 1 to 10 and Z is ##STR1## R2 being an aryl, a substituted aryl, a cycloalkyl or a heterocyclic group, m being an integer of 1 to 6, R3 being hydrogen or a lower alkyl, R4 being an aryl or a substituted aryl, a cycloalkyl or a heterocyclic group, p being an integer of 1 to 6, provided that the cyclic amide compound is quinazoline-on or quinazoline-dion, R2 and R4 are neither aryl nor substituted aryl. The cyclic amide compound is pharmacologically effective to prevent and treat diseases due to insufficiency of the central choline functions.Type: GrantFiled: May 25, 1995Date of Patent: July 6, 1999Assignee: Eisai Co., Ltd.Inventors: Hachiro Sugimoto, Masahiro Yonaga, Norio Karibe, Youichi Iimura, Satoshi Nagato, Atsushi Sasaki, Yoshiharu Yamanishi, Hiroo Ogura, Takashi Kosasa, Kumi Uchikoshi, Kiyomi Yamatsu
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Patent number: 5654308Abstract: The cyclic amide derivative is defined by the formula (I) or a salt thereof: R.sup.1 --(CH.sub.2)n-Z in which R.sup.1 is a group derived from a cyclic amide compound, substituted or unsubstituted, n is zero or an integer of 1 to 10 and Z is ##STR1## R.sup.2 being an aryl, a substituted aryl, a cycloalkyl or a heterocyclic group, m being an integer of 1 to 6, R.sup.3 being hydrogen or a lower alkyl, R.sup.4 being an aryl or a substituted aryl, a cycloalkyl or a heterocyclic group, p being an integer of 1 to 6, provided that the cyclic amide compound is quinazoline-on or quinazoline-dion, R.sup.2 and R.sup.4 are neither aryl nor substituted aryl. The cyclic amide compound is pharmacologically effective to prevent and treat diseases due to insufficiency of the central choline functions.Type: GrantFiled: May 25, 1995Date of Patent: August 5, 1997Assignee: Eisai Co., Ltd.Inventors: Hachiro Sugimoto, Masahiro Yonaga, Norio Karibe, Youichi Iimura, Satoshi Nagato, Atsushi Sasaki, Yoshiharu Yamanishi, Hiroo Ogura, Takashi Kosasa, Kumi Uchikoshi, Kiyomi Yamatsu
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Patent number: 5620976Abstract: The cyclic amide derivative is defined by the formula (I) or a salt thereof: R.sup.1 --(CH2)n--Z in which R.sup.1 is a group derived from a cyclic amide compound, substituted or unsubstituted, n is zero or an integer of 1 to 10 and Z is ##STR1## R.sup.2 being an aryl, a substituted aryl, a cycloalkyl or a heterocyclic group, m being an integer of 1 to 6, R.sup.3 being hydrogen or a lower alkyl, R.sup.4 being an aryl or a substituted aryl, a cycloalkyl or a heterocyclic group, p being an integer of 1 to 6, provided that the cyclic amide compound is quinazoline-on or quinazoline-dion, R2 and R4 are neither aryl nor substituted aryl. The cyclic amide compound is pharmacologically effective to prevent and treat diseases due to insufficiency of the central choline functions.Type: GrantFiled: May 25, 1995Date of Patent: April 15, 1997Assignee: Eisai Co., Ltd.Inventors: Hachiro Sugimoto, Masahiro Yonaga, Norio Karibe, Youichi Iimura, Satoshi Nagato, Atsushi Sasaki, Yoshiharu Yamanishi, Hiroo Ogura, Takashi Kosasa, Kumi Uchikoshi, Kiyomi Yamatsu
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Patent number: 5521182Abstract: The cyclic amide derivative is defined by the formula (I) or a salt thereof:R.sup.1 --(CH.sub.2).sub.n --Zin whichR.sup.1 is a group derived from a cyclic amide compound, substituted or unsubstituted, n is zero or an integer of 1 to 10 and Z is ##STR1## R.sup.2 being an aryl, a substituted aryl, a cycloalkyl or a heterocyclic group, m being an integer of 1 to 6, R.sup.3 being hydrogen or a lower alkyl, R.sup.4 being an aryl or a substituted aryl, a cycloalkyl or a heterocyclic group, p being an integer of 1 to 6, provided that the cyclic amide compound is quinazoline-on or quinazoline-dion, R.sup.2 and R.sup.4 are neither aryl nor substituted aryl. The cyclic amide compound is pharmacologically effective to prevent and treat diseases due to insufficiency of the central choline functions.Type: GrantFiled: May 25, 1995Date of Patent: May 28, 1996Assignee: Eisai Co., Ltd.Inventors: Hachiro Sugimoto, Masahiro Yonaga, Norio Karibe, Youichi Iimura, Satoshi Nagato, Atsushi Sasaki, Yoshiharu Yamanishi, Hiroo Ogura, Takashi Kosasa, Kumi Uchikoshi, Kiyomi Yamatsu
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Patent number: 5504088Abstract: The cyclic amide derivative is defined by the formula (I) or a salt thereof:R.sup.1 --(CH.sub.2).sub.n --Zin which R.sup.1 is a group derived from a cyclic amide compound, substituted or unsubstituted, n is zero or an integer of 1 to 10 and Z is ##STR1## R.sup.2 being an aryl, a substituted aryl, a cycloalkyl or a heterocyclic group, m being an integer of 1 to 6, R.sup.3 being hydrogen or a lower alkyl, R.sup.4 being an aryl or a substituted aryl, a cycloalkyl or a heterocyclic group, p being an integer of 1 to 6, provided that the cyclic amide compound is quinazoline-on or quinazoline-dion, R.sup.2 and R.sup.4 are neither aryl nor substituted aryl. The cyclic amide compound is pharmacologically effective to prevent and treat diseases due to insufficiency of the central choline functions.Type: GrantFiled: December 13, 1993Date of Patent: April 2, 1996Assignee: Eisai Co., Ltd.Inventors: Hachiro Sugimoto, Masahiro Yonaga, Norio Karibe, Youichi Iimura, Satoshi Nagato, Atsushi Sasaki, Yoshiharu Yamanishi, Hiroo Ogura, Takashi Kosasa, Kumi Uchikoshi, Kiyomi Yamatsu
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Patent number: 5292735Abstract: The cyclic amide derivative is defined by the formula (I) or a salt thereof: R1--(CH2)n-z in which R1 is a group derived from a cyclic amide compound, substituted or unsubstituted, n is zero or an integer of 1 to 10 and Z is ##STR1## R2 being an aryl, a substituted aryl, a cycloalkyl or a heterocyclic group, m being an integer of 1 to 6, R3 being hydrogen or a lower alkyl, R4 being an aryl or a substituted aryl, a cycloalkyl or a heterocyclic group, p being an integer of 1 to 6, provided that the cyclic amide compound is quinazoline-on or quinazoline-dion, R2 and R4 are neither aryl nor substituted aryl. The cyclic amide compound is pharmacologically effective to prevent and treat diseases due to insufficiency of the central choline functions.Type: GrantFiled: June 14, 1991Date of Patent: March 8, 1994Assignee: Eisai Co., Ltd.Inventors: Hachiro Sugimoto, Masahiro Yonaga, Norio Karibe, Youichi Iimura, Satoshi Nagato, Atsushi Sasaki, Yoshiharu Yamanishi, Hiroo Ogura, Takashi Kosasa, Kumi Uchikoshi, Kiyomi Yamatsu