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).

  • Patent number: 9018260
    Abstract: 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: Grant
    Filed: June 17, 2013
    Date of Patent: April 28, 2015
    Assignee: 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
  • Publication number: 20140371319
    Abstract: 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: Application
    Filed: June 17, 2013
    Publication date: December 18, 2014
    Applicant: 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
  • Publication number: 20090137629
    Abstract: 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: Application
    Filed: November 5, 2008
    Publication date: May 28, 2009
    Inventors: Yoichi Iimura, Takashi Kosasa, Yoshiharu Yamanishi
  • Patent number: 7378425
    Abstract: 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: Grant
    Filed: September 15, 2004
    Date of Patent: May 27, 2008
    Assignee: Eisai R & D Management Co., Ltd.
    Inventors: Yoichi Iimura, Takashi Kosasa, Yoshiharu Yamanishi
  • Patent number: 7091218
    Abstract: 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: Grant
    Filed: September 1, 2000
    Date of Patent: August 15, 2006
    Assignee: Eisai Co., Ltd.
    Inventors: Yoichi Iimura, Takashi Kosasa
  • Patent number: 6906083
    Abstract: 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: Grant
    Filed: June 21, 2001
    Date of Patent: June 14, 2005
    Assignee: Eisai Co., Ltd.
    Inventors: Yoichi Iimura, Takashi Kosasa
  • Publication number: 20050124642
    Abstract: 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: Application
    Filed: September 15, 2004
    Publication date: June 9, 2005
    Applicant: Eisai Co., Ltd.
    Inventors: Yoichi Iimura, Takashi Kosasa, Yoshiharu Yamanishi
  • Publication number: 20050107432
    Abstract: 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: Application
    Filed: January 22, 2003
    Publication date: May 19, 2005
    Inventors: Yoichi Iimura, Takashi Kosasa, Yoshiharu Yamanishi
  • Publication number: 20050026895
    Abstract: 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: Application
    Filed: September 1, 2004
    Publication date: February 3, 2005
    Inventors: Yoichi Iimura, Takashi Kosasa
  • Patent number: 6706741
    Abstract: 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: Grant
    Filed: September 18, 2002
    Date of Patent: March 16, 2004
    Assignee: Eisai Co., Ltd.
    Inventors: Yoichi Iimura, Takashi Kosasa
  • Patent number: 6677330
    Abstract: 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: Grant
    Filed: August 30, 2001
    Date of Patent: January 13, 2004
    Assignee: Eisai Co., Ltd.
    Inventors: Yoichi Iimura, Takashi Kosasa, Yoshiharu Yamanishi, Hachiro Sugimoto, Yoshio Takeuchi, Tetsuo Shibata, Emiko Suzuki
  • Publication number: 20030166925
    Abstract: The present invention provides a novel compound having a superior acetylcholinesterase inhibitory action.
    Type: Application
    Filed: November 25, 2002
    Publication date: September 4, 2003
    Inventors: Yoichi Iimura, Takashi Kosasa
  • Publication number: 20030069289
    Abstract: The present invention provides an excellent acetylcholinesterase inhibitor.
    Type: Application
    Filed: September 18, 2002
    Publication date: April 10, 2003
    Inventors: Yoichi Iimura, Takashi Kosasa
  • Patent number: 6277866
    Abstract: 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: Grant
    Filed: October 27, 1999
    Date of Patent: August 21, 2001
    Assignee: Eisai Co., Ltd.
    Inventors: Yoshio Takeuchi, Norio Shibata, Emiko Suzuki, Yoichi Iimura, Takashi Kosasa, Yoshiharu Yamanishi, Hachiro Sugimoto
  • Patent number: 5919778
    Abstract: 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: Grant
    Filed: May 25, 1995
    Date of Patent: July 6, 1999
    Assignee: 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
  • Patent number: 5654308
    Abstract: 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: Grant
    Filed: May 25, 1995
    Date of Patent: August 5, 1997
    Assignee: 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
  • Patent number: 5620976
    Abstract: 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: Grant
    Filed: May 25, 1995
    Date of Patent: April 15, 1997
    Assignee: 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
  • Patent number: 5521182
    Abstract: 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: Grant
    Filed: May 25, 1995
    Date of Patent: May 28, 1996
    Assignee: 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
  • Patent number: 5504088
    Abstract: 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: Grant
    Filed: December 13, 1993
    Date of Patent: April 2, 1996
    Assignee: 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
  • Patent number: 5292735
    Abstract: 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: Grant
    Filed: June 14, 1991
    Date of Patent: March 8, 1994
    Assignee: 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