Patents by Inventor Akira Asagarasu

Akira Asagarasu 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: 10815268
    Abstract: Provided is a process for producing a compound, which has an oxo group specifically introduced on the 15-position of a steroid skeleton and which is useful as an intermediate, with a high yield without complicated steps. A compound represented by the formula (2) is allowed to react with an oxidant (e.g., a hypervalent iodine compound) and a co-oxidant (e.g., a peroxide) to produce a 15-oxosteroid compound represented by the formula (1), which is useful as an intermediate: wherein R1 to R3 are the same or different and each represent a halogen atom, an alkyl group, a haloalkyl group, an alkoxy group, or a haloalkoxy group, R4 represents a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an acyl group, or an alkoxycarbonyl group, R5 represents a hydrogen atom, an alkyl group, or an acyl group, R6 represents a hydrogen atom, an alkyl group, an acyl group, or a sulfonyl group, X represents an oxygen atom (O) or a methylene group (CH2).
    Type: Grant
    Filed: February 8, 2018
    Date of Patent: October 27, 2020
    Assignee: ASKA PHARMACEUTICAL CO., LTD.
    Inventors: Yosuke Takenaka, Norihito Isomura, Akira Asagarasu, Hiroshi Uchida
  • Publication number: 20190389900
    Abstract: Provided is a process for producing a compound, which has an oxo group specifically introduced on the 15-position of a steroid skeleton and which is useful as an intermediate, with a high yield without complicated steps. A compound represented by the formula (2) is allowed to react with an oxidant (e.g., a hypervalent iodine compound) and a co-oxidant (e.g., a peroxide) to produce a 15-oxosteroid compound represented by the formula (1), which is useful as an intermediate: wherein R1 to R3 are the same or different and each represent a halogen atom, an alkyl group, a haloalkyl group, an alkoxy group, or a haloalkoxy group, R4 represents a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an acyl group, or an alkoxycarbonyl group, R5 represents a hydrogen atom, an alkyl group, or an acyl group, R6 represents a hydrogen atom, an alkyl group, an acyl group, or a sulfonyl group, X represents an oxygen atom (O) or a methylene group (CH2).
    Type: Application
    Filed: February 8, 2018
    Publication date: December 26, 2019
    Applicant: ASKA Pharmaceutical Co., Ltd.
    Inventors: Yosuke TAKENAKA, Norihito ISOMURA, Akira ASAGARASU, Hiroshi UCHIDA
  • Patent number: 9200008
    Abstract: A novel heterocyclic compound or a salt thereof useful for selectively inhibiting the degradation of p27Kip1 is provided. The compound or the salt thereof is represented by the following formula (1): wherein A represents an alkyl group, a cycloalkyl group, an aryl group or a heterocyclic group, the group A may have a substituent; the ring B represents a 5- to 8-membered monocyclic heterocyclic ring or a condensed ring containing the monocyclic heterocyclic ring, the ring B may have a substituent; the ring C represents an aromatic ring, the ring C may have a substituent; L represents a linker comprising a main chain having 3 to 5 atoms selected from the group consisting of a carbon atom, a nitrogen atom, an oxygen atom and a sulfur atom, wherein at least one atom in the main chain is a hetero atom selected from the group consisting of a nitrogen atom, an oxygen atom and a sulfur atom, the linker L may have a substituent; and n is 0 or 1.
    Type: Grant
    Filed: July 1, 2011
    Date of Patent: December 1, 2015
    Assignee: ASKA PHARMACEUTICAL CO., LTD.
    Inventors: Hiroshi Uchida, Akira Asagarasu, Teruaki Matsui
  • Publication number: 20130079306
    Abstract: A novel heterocyclic compound or a salt thereof useful for selectively inhibiting the degradation of p27Kip1 is provided. The compound or the salt thereof is represented by the following formula (1): wherein A represents an alkyl group, a cycloalkyl group, an aryl group or a heterocyclic group, the group A may have a substituent; the ring B represents a 5- to 8-membered monocyclic heterocyclic ring or a condensed ring containing the monocyclic heterocyclic ring, the ring B may have a substituent; the ring C represents an aromatic ring, the ring C may have a substituent; L represents a linker comprising a main chain having 3 to 5 atoms selected from the group consisting of a carbon atom, a nitrogen atom, an oxygen atom and a sulfur atom, wherein at least one atom in the main chain is a hetero atom selected from the group consisting of a nitrogen atom, an oxygen atom and a sulfur atom, the linker L may have a substituent; and n is 0 or 1.
    Type: Application
    Filed: July 1, 2011
    Publication date: March 28, 2013
    Inventors: Hiroshi Uchida, Akira Asagarasu, Teruaki Matsui
  • Patent number: 8377944
    Abstract: This invention provides thienopyrimidine derivatives of the formula, wherein R1 stands for hydrogen atom, an alkyl group or the like; R2 stands for a hydrogen atom, an alkyl or amino group or the like, R3 stands for an alkyl, alkenyl or alkylthio group or the like or a group Y—X—; or R2 and R3 may together form tetramethylene group; X standing for a direct bond or linking group such as CH2, CH(OH), S, O, NH; Y standing for a substituted or unsubstituted aromatic carbocyclic, aromatic heterocylic, cycloalkyl or saturated heterocyclic group or the like; Z stands for S or O, and n is 0 or an integer of 1 to 4, or salts thereof, which exhibit an inhibitory effect on PDE9, and are therefore useful for prevention or treatment of overactive bladder syndrome, pollakiuria, urinary incontinence, dysuria associated with prostatic hyperplasia, urolithiasis, Alzheimer's disease, chronic obstructive pulmonary disease, myocardial infarction, thrombosis, diabetes and the like.
    Type: Grant
    Filed: August 14, 2012
    Date of Patent: February 19, 2013
    Assignee: ASKA Pharmaceutical Co., Ltd.
    Inventors: Kotaro Gotanda, Atsushi Shinbo, Youichi Nakano, Hideo Kobayashi, Makoto Okada, Akira Asagarasu
  • Publication number: 20130023546
    Abstract: This invention provides thienopyrimidine derivatives of the formula, wherein R1 stands for hydrogen atom, an alkyl group or the like; R2 stands for a hydrogen atom, an alkyl or amino group or the like, R3 stands for an alkyl, alkenyl or alkylthio group or the like or a group Y—X—; or R2 and R3 may together form tetramethylene group; X standing for a direct bond or linking group such as CH2, CH(OH), S, O, NH; Y standing for a substituted or unsubstituted aromatic carbocycylic, aromatic heterocylic, cycloalkyl or saturated heterocyclic group or the like; Z stands for S or O, and n is 0 or an integer of 1 to 4, or salts thereof, which exhibit an inhibitory effect on PDE9, and are therefore useful for prevention or treatment of overactive bladder syndrome, pollakiuria, urinary incontinence, dysuria associated with prostatic hyperplasia, urolithiasis, Alzheimer's disease, chronic obstructive pulmonary disease, myocardial infarction, thrombosis, diabetes and the like.
    Type: Application
    Filed: August 14, 2012
    Publication date: January 24, 2013
    Inventors: Kotaro GOTANDA, Atsushi Shinbo, Youichi Nakano, Hideo Kobayashi, Makoto Okada, Akira Asagarasu
  • Patent number: 8293754
    Abstract: This invention provides thienopyrimidine derivatives of the formula, wherein R1 stands for hydrogen atom, an alkyl group or the like; R2 stands for a hydrogen atom, an alkyl or amino group or the like, R3 stands for an alkyl, alkenyl or alkylthio group or the like or a group Y—X—; or R2 and R3 may together form tetramethylene group; X standing for a direct bond or linking group such as CH2, CH(OH), S, O, NH; Y standing for a substituted or unsubstituted aromatic carbocycylic, aromatic heterocylic, cycloalkyl or saturated heterocyclic group or the like; Z stands for S or O, and n is 0 or an integer of 1 to 4, or salts thereof, which exhibit an inhibitory effect on PDE9, and are therefore useful for prevention or treatment of overactive bladder syndrome, pollakiuria, urinary incontinence, dysuria associated with prostatic hyperplasia, urolithiasis, Alzheimer's disease, chronic obstructive pulmonary disease, myocardial infarction, thrombosis, diabetes and the like.
    Type: Grant
    Filed: June 13, 2006
    Date of Patent: October 23, 2012
    Assignee: Aska Pharmaceutical Co., Ltd.
    Inventors: Kotaro Gotanda, Atsushi Shinbo, Youichi Nakano, Hideo Kobayashi, Makoto Okada, Akira Asagarasu
  • Patent number: 8101624
    Abstract: The invention discloses quinazoline derivatives or salts thereof, which possess PDE9-inhibiting activity and are useful as treating agents of dysuria and the like, the derivatives being represented by the formula (I) in the formula, R1 stands for phenyl or aromatic heterocyclic group which are optionally substituted with 1-3 substituents selected from halogen, C1-6 alkyl, C1-6 haloalkyl containing 1-6 halogen atoms and C1-6 alkoxy; and n is an integer of 1-3.
    Type: Grant
    Filed: July 24, 2007
    Date of Patent: January 24, 2012
    Assignee: Aska Pharmaceutical Co., Ltd.
    Inventors: Akira Asagarasu, Shuichiro Sato, Makoto Okada
  • Patent number: 7799775
    Abstract: This invention provides pyrimidine derivatives represented by a formula, in the formula, ring A stands for carbocyclic group or heterocyclic group, X1 stands for hydrogen, lower alkyl, amino, etc., X2 stands for hydrogen or lower alkyl, Y stands for a direct bond or sulfur or nitrogen, n stands for an integer of 0-4, and Ar stands for a group of the following formula, or a salt thereof, which concurrently exhibit 5-HT1A agonistic activity and 5-HT3 antagonistic activity and are useful for therapy and treatments of diseases such as IBS. The invention furthermore provides a therapeutic method of IBS, characterized by having 5-HT1A agonistic activity and 5-HT3 antagonistic activity work simultaneously and cooperatively in vivo, which comprises either administering 5-HT3 antagonistic agent which concurrently exhibits 5-HT1A agonistic activity, or administering 5-HT1A agonistic agent and 5-HT3 antagonistic agent simultaneously, in sequence or at an interval.
    Type: Grant
    Filed: February 25, 2005
    Date of Patent: September 21, 2010
    Assignee: ASKA Pharmaceutical Co., Ltd.
    Inventors: Michitaka Sato, Teruaki Matsui, Akira Asagarasu, Hiroyuki Hayashi, Sei-ichi Araki, Satoru Tamaoki, Nobuyuki Takahashi, Yukinao Yamauchi, Yoshiko Yamamoto, Norio Yamamoto, Chisato Ogawa
  • Publication number: 20100113484
    Abstract: Disclosed is a treating agent of overactive bladder syndrome, pollakiuria, urinary incontinence, dysuria in benign prostatic hyperplasia or urolithiasis, which comprises a compound having PDE9-inhibiting activity as the active ingredient.
    Type: Application
    Filed: December 12, 2007
    Publication date: May 6, 2010
    Applicant: ASKA PHARMACEUTICAL CO., LTD.
    Inventors: Kotaro Gotanda, Atsushi Shinbo, Youichi Nakano, Hideo Kobayashi, Makoto Okada, Akira Asagarasu
  • Publication number: 20090318478
    Abstract: The invention discloses quinazoline derivatives or salts thereof, which possess PDE9-inhibiting activity and are useful as treating agents of dysuria and the like, the derivatives being represented by the formula (I) in the formula, R1 stands for phenyl or aromatic heterocyclic group which are optionally substituted with 1-3 substituents selected from halogen, C1-6 alkyl, C1-6 haloalkyl containing 1-6 halogen atoms and C1-6 alkoxy; and n is an integer of 1-3.
    Type: Application
    Filed: July 24, 2007
    Publication date: December 24, 2009
    Inventors: Akira Asagarasu, Shuichiro Sato, Makoto Okada
  • Publication number: 20090203703
    Abstract: This invention provides thienopyrimidine derivatives of the formula, wherein R1 stands for hydrogen atom, an alkyl group or the like; R2 stands for a hydrogen atom, an alkyl or amino group or the like, R3 stands for an alkyl, alkenyl or alkylthio group or the like or a group Y—X—; or R2 and R3 may together form tetramethylene group; X standing for a direct bond or linking group such as CH2, CH(OH), S, O, NH; Y standing for a substituted or unsubstituted aromatic carbocycylic, aromatic heterocylic, cycloalkyl or saturated heterocyclic group or the like; Z stands for S or O, and n is 0 or an integer of 1 to 4, or salts thereof, which exhibit an inhibitory effect on PDE9, and are therefore useful for prevention or treatment of overactive bladder syndrome, pollakiuria, urinary incontinence, dysuria associated with prostatic hyperplasia, urolithiasis, Alzheimer's disease, chronic obstructive pulmonary disease, myocardial infarction, thrombosis, diabetes and the like.
    Type: Application
    Filed: June 13, 2006
    Publication date: August 13, 2009
    Inventors: Kotaro Gotanda, Atsushi Shinbo, Youichi Nakano, Hideo Kobayashi, Makoto Okada, Akira Asagarasu
  • Publication number: 20070197551
    Abstract: This invention provides pyrimidine derivatives represented by a formula, in the formula, ring A stands for carbocyclic group or heterocyclic group, X1 stands for hydrogen, lower alkyl, amino, etc., X2 stands for hydrogen or lower alkyl, Y stands for a direct bond or sulfur or nitrogen, n stands for an integer of 0-4, and Ar stands for a group of the following formula, or a salt thereof, which concurrently exhibit 5-HT1A agonistic activity and 5-HT3 antagonistic activity and are useful for therapy and treatments of diseases such as IBS. The invention furthermore provides a therapeutic method of IBS, characterized by having 5-HT1A agonistic activity and 5-HT3 antagonistic activity work simultaneously and cooperatively in vivo, which comprises either administering 5-HT3 antagonistic agent which concurrently exhibits 5-HT1A agonistic activity, or administering 5-HT1A agonistic agent and 5-HT3 antagonistic agent simultaneously, in sequence or at an interval.
    Type: Application
    Filed: February 25, 2005
    Publication date: August 23, 2007
    Inventors: Michitaka Sato, Teruaki Matsui, Akira Asagarasu, Hiroyuki Hayashi, Sei-ichi Araki, Satoru Tamaoki, Nobuyuki Takahashi, Yukinao Yamauchi, Yoshiko Yamamoto, Norio Yamamoto, Chisato Ogawa
  • Patent number: 7087624
    Abstract: Substituted pyrazole compounds represented by formula (I), or salts thereof are disclosed, wherein R1 is —CH(OH)—CH(R4)-(A)n-Y, —CH2—CH(R4)-(A)n-Y, —CO-B1-A-Y or the like (wherein A is a lower alkylene; Y is an aryl group which may be substituted, for example, by halogen, or the like; R4 is a hydrogen atom or a lower alkyl group; B1 is —CH(R4)— or —N(R4)—; and n is 0 or 1); R2 is a hydrogen atom, a lower alkyl group which may be substituted by hydroxyl or the like, or an aralkyl group; R3 is a phenyl group which may be substituted by halogen or the like, or a pyridyl group; and Q is a pyridyl or quinolyl group.
    Type: Grant
    Filed: October 27, 2003
    Date of Patent: August 8, 2006
    Assignee: Teikoju Hormone Mfg. Co., Ltd.
    Inventors: Nobuyoshi Minami, Michitaka Sato, Koichi Hasumi, Norio Yamamoto, Katsuyuki Keino, Teruaki Matsui, Arihiro Kanada, Shuji Ohta, Takahisa Saito, Shuichiro Sato, Akira Asagarasu, Satoshi Doi, Motohiro Kobayashi, Jun Sato, Hajime Asano
  • Publication number: 20040087628
    Abstract: Substituted pyrazole compounds represented by formula (I), or salts thereof are disclosed, wherein R1 is —CH(OH)—CH(R4)-(A)n —Y, —CH2 —CH(R4)-(A)n—Y, —CO—B1-A-Y or the like (wherein A is a lower alkylene; Y is an aryl group which may be substituted, for example, by halogen, or the like; R4 is a hydrogen atom or a lower alkyl group; B1 is —CH(R4)— or —N(R4)—; and n is 0 or 1); R2 is a hydrogen atom, a lower alkyl group which may be substituted by hydroxyl or the like, or an aralkyl group; R3 is a phenyl group which may be substituted by halogen or the like, or a pyridyl group; and Q is a pyridyl or quinolyl group. These substituted pyrazole compounds or their salts have an excellent p38MAP kinase inhibiting effect and are hence useful in the prevention or treatment of tumor necrosis factor &agr;-related diseases, interleukin 1-related diseases, interleukin 6-related diseases or cyclooxygenase II-related diseases.
    Type: Application
    Filed: October 27, 2003
    Publication date: May 6, 2004
    Inventors: Nobuyoshi Minami, Michitaka Sato, Koichi Hasumi, Norio Yamamoto, Katsuyuki Keino, Teruaki Matsui, Arihiro Kanada, Shuji Ohta, Takahisa Saito, Shuichiro Sato, Akira Asagarasu, Satoshi Doi, Motohiro Kobayashi, Jun Sato, Hajime Asano
  • Patent number: 6667325
    Abstract: Substituted pyrazole compounds represented by formula (I), or salts thereof are disclosed, wherein R1 is —CH(OH)—CH(R4)—(A)n—Y, —CH2—CH(R4)—(A)n—Y, —CO—B1—A—Y or the like (wherein A is a lower alkylene; Y is an aryl group which may be substituted, for example, by halogen, or the like; R4 is a hydrogen atom or a lower alkyl group; B1 is —CH(R4)— or —N(R4)—; and n is 0 or 1); R2 is a hydrogen atom, a lower alkyl group which may be substituted by hydroxyl or the like, or an aralkyl group; R3 is a phenyl group which may be substituted by halogen or the like, or a pyridyl group; and Q is a pyridyl or quinolyl group. These substituted pyrazole compounds or their salts have an excellent p38MAP kinase inhibiting effect and are hence useful in the prevention or treatment of tumor necrosis factor &agr;-related diseases, interleukin 1-related diseases, interleukin 6-related diseases or cyclooxygenase II-related diseases.
    Type: Grant
    Filed: December 3, 2001
    Date of Patent: December 23, 2003
    Assignee: Teikoku Hormone Mfg. Co., Ltd.
    Inventors: Nobuyoshi Minami, Michitaka Sato, Koichi Hasumi, Norio Yamamoto, Katsuyuki Keino, Teruaki Matsui, Arihiro Kanada, Shuji Ohta, Takahisa Saito, Shuichiro Sato, Akira Asagarasu, Satoshi Doi, Motohiro Kobayashi, Jun Sato, Hajime Asano
  • Patent number: 6511997
    Abstract: Aminopyrazole derivatives represented by formula (I), or salts thereof, wherein X1 and X2 are each a hydrogen atom or a halogen atom, or X1 and X2 may be united together to form a lower alkylenedioxy group, Q is a pyridyl group or a quinolyl group, R1 is a hydrogen atom, a substituted or unsubstituted lower alkyl or aryl group, R2 is a hydrogen atom, a lower alkyl group, or an aralkyl group, and R3 represents a hydrogen atom, an organic sulfonyl group, or —C(═Y)—R4 in which R4 is a hydrogen atom or an organic residue and Y is an oxygen or sulfur atom, provided that, when R3 is a hydrogen atom, R1 is a group other than a hydrogen atom and R2 is a hydrogen atom. These amimopyrazole derivatives or their salts have excellent p38MAP kinase inhibiting activities and are hence useful in the prevention or treatment of diseases associated with tumor necrosis sis factor &agr;, interleukin 1, interleukin 6 or cyclooxygenase II.
    Type: Grant
    Filed: June 22, 2001
    Date of Patent: January 28, 2003
    Assignee: Teikoku Hormone Mfg. Co., Ltd.
    Inventors: Nobuyoshi Minami, Michitaka Sato, Koichi Hasumi, Norio Yamamoto, Katsuyuki Keino, Teruaki Matsui, Arihiro Kanada, Shuji Ohta, Takahisa Saito, Shuichiro Sato, Akira Asagarasu, Satoshi Doi, Motohiro Kobayashi, Jun Sato, Hajime Asano