Patents Assigned to Kowa Co., Ltd.
  • Patent number: 7576203
    Abstract: The present invention provides an industrially useful method for synthesizing a cyclic diamine derivative (4) or a salt thereof which serves as an ACAT inhibitor. A 2-hydroxyacetylaminopyridine compound represented by formula (1), and a method for producing a cyclic diamine derivative represented by formula (4) or a salt thereof from compound (1) through 1) Step A-1, 2) Steps B-1 and B-2, or 3) Steps B-1, B-3, and B-4.
    Type: Grant
    Filed: June 30, 2005
    Date of Patent: August 18, 2009
    Assignee: Kowa Co., Ltd.
    Inventors: Kimiyuki Shibuya, Ayako Tosaka
  • Publication number: 20090203701
    Abstract: A medicament having excellent therapeutic and prophylactic effects on rheumatoid arthritis is provided. A prophylactic and/or therapeutic agent for rheumatoid arthritis, comprising 2-benzyl-5-(4-chlorophenyl)-6-[4-(methylthio)phenyl]-2H-pyridazin-3-one and an HMG-CoA reductase inhibitor in combination.
    Type: Application
    Filed: June 27, 2007
    Publication date: August 13, 2009
    Applicant: KOWA CO., LTD
    Inventor: Yuichiro Tabunoki
  • Publication number: 20090186850
    Abstract: A peritoneal dialysate containing adenosine triphosphate or a salt thereof, and a peritoneal dialysis method using the dialysate. The peritoneal dialysate is safe and causes less peritoneal injuries even when employed in peritoneal dialysis over a long period of time.
    Type: Application
    Filed: March 30, 2009
    Publication date: July 23, 2009
    Applicant: Kowa Co., Ltd.
    Inventors: Kei KIRIBAYASHI, Noriaki Yorioka
  • Patent number: 7560547
    Abstract: The present invention is directed to a process for producing a compound (5) from the compound (1). By use of the compound (1), a variety of cyclic diamine derivatives (5) or salts thereof, useful as drugs, can be produced in an industrially advantageous manner with a constant yield.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: July 14, 2009
    Assignee: Kowa Co., Ltd.
    Inventors: Kimiyuki Shibuya, Tadaaki Ohgiya, Toru Miura
  • Publication number: 20090143430
    Abstract: The present invention relates to a preventive or therapeutic agent for pathological conditions caused by reduced production of erythropoietin, or for anemia, or for chronic anemia, renal anemia, aplastic anemia, or pure red cell aplasia, the agent comprising, as an active ingredient, a cyclic amine compound represented by the following formula (1): wherein, R1, R2 and R3 each independently represent a hydrogen atom, a halogen atom, or hydroxy, alkyl, halogen-substituted alkyl, alkoxy, alkylthio, carboxyl, alkoxycarbonyl or alkanoyl group; W1 and W2 each independently represent N or CH; X represents O, NR4, CONR4 or NR4CO; R4 each represents a hydrogen atom, or an alkyl, alkenyl, alkynyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted aralkyl, or substituted or unsubstituted heteroaralkyl group; and l, m and n each represents a number of 0 or 1, or a salt thereof or a solvate thereof.
    Type: Application
    Filed: December 2, 2008
    Publication date: June 4, 2009
    Applicant: Kowa Co., Ltd.
    Inventors: Shigehiko IMAGAWA, Takeshi Doi, Masahiro Tamura, Masao Ohkuchi
  • Publication number: 20090137657
    Abstract: The present invention provides an indomethacin-containing external liquid preparation which provides good feeling of use, which exhibits high percutaneous absorption of indomethacin, and which, particularly in a low-temperature environment, does not cause precipitation of crystals with time. The present invention is drawn to an external liquid preparation containing indomethacin, a lower alcohol, water, a sulfite, and polyethylene glycol having an average molecular weight of 3,000 to 15,000.
    Type: Application
    Filed: October 16, 2006
    Publication date: May 28, 2009
    Applicant: Kowa Co., Ltd
    Inventors: Hiroshi Miura, Makoto Kanebako
  • Patent number: 7538242
    Abstract: The present invention provides a production intermediate for compound (A-1) and a method for producing the intermediate at high yield and high optical yield.
    Type: Grant
    Filed: February 28, 2006
    Date of Patent: May 26, 2009
    Assignee: Kowa Co., Ltd.
    Inventors: Yukiyoshi Yamazaki, Takaaki Araki, Minoru Koura, Kimiyuki Shibuya
  • Publication number: 20090131330
    Abstract: Disclosed is a compound represented by the following general formula (1): Ar—CO-AA1-AA2-AA3-AA4-NH—X—NR1R2 (1) (wherein Ar represents an optionally substituted phenyl group or an aromatic heterocyclic group; AA1 represents a hydrophobic amino acid; AA2 represents an unsubstituted amino acid containing 2 or more carbon atoms; AA3 represents an unsubstituted amino acid containing 2 or more carbon atoms; AA4 represents a hydrophobic amino acid; X represents a divalent saturated aliphatic hydrocarbon group having 2-6 carbon atoms; and R1 and R2 may be the same or different and independently represent a saturated or unsubstituted aliphatic hydrocarbon group having 1-8 carbon atoms, or alternatively R1 and R2 may form a ring together with an adjacent nitrogen atom), a salt thereof, or a solvate of them.
    Type: Application
    Filed: December 27, 2005
    Publication date: May 21, 2009
    Applicant: KOWA CO., LTD.
    Inventors: Hiroyuki Ishiwata, Mototsugu Kabeya, Toru Kanke
  • Publication number: 20090131443
    Abstract: The invention provides a method for the prevention and/or treatment of rheumatoid arthritis, characterized in that the method comprises administering an IL-1? inhibitor and a calcineurin inhibitor, and a preventive and/or therapeutic medicine for rheumatoid arthritis including an IL-1? inhibitor and a calcineurin inhibitor in combination. According to the invention, there can be provided a medicine and method for treating rheumatoid arthritis which exhibits suppressed side effects and excellent potency for suppression of arthritis.
    Type: Application
    Filed: October 27, 2006
    Publication date: May 21, 2009
    Applicant: Kowa Co., Ltd.
    Inventors: Yuichiro Tabunoki, Tomoyuki Koshi
  • Publication number: 20090118299
    Abstract: There is Provided an Agent for Prevention of glaucoma or an agent for prevention or treatment of ocular hypertension, with a potent ocular hypotensive effect and prolonged duration thereof. An agent for prevention or treatment of glaucoma comprising a Rho kinase inhibitor and a carbonic anhydrase inhibitor in combination.
    Type: Application
    Filed: July 11, 2006
    Publication date: May 7, 2009
    Applicant: KOWA CO., LTD.
    Inventors: Ken Mizuno, Jiro Matsumoto
  • Patent number: 7523311
    Abstract: The method extracts a plurality of blocks from a master image, processes image data corresponding to each block by orthogonal transform, compares coefficients of adjoining blocks with each other, and modifies the order of magnitude of the coefficients, based on bit information to be embedded. The bit information to be embedded is constructed as a basic pattern, which is generated, for example, by the density pattern method. The basic pattern is embedded in image data iteratively. The process of iteratively embedding the basic pattern enhances the resistance against various attacks.
    Type: Grant
    Filed: January 24, 2000
    Date of Patent: April 21, 2009
    Assignee: Kowa Co., Ltd.
    Inventor: Kineo Matsui
  • Publication number: 20090082338
    Abstract: There is provided a preventive for glaucoma or a preventive or a remedy for ocular hypertension, with a potent ocular hypotensive effect and prolonged duration thereof. A preventive or a remedy for glaucoma comprising a Rho kinase inhibitor and an ?1 blocker in combination.
    Type: Application
    Filed: June 20, 2006
    Publication date: March 26, 2009
    Applicant: Kowa Co., Ltd.
    Inventors: Ken Mizuno, Jiro Matsumoto
  • Publication number: 20090076280
    Abstract: The invention provides a process for producing an optically active butyric acid compound and a production intermediate therefor at high yield and high purity. The present invention provides a process for producing Compound (6), including reacting Compound (1) with optically active 2-trifluoromethanesulfonyloxybutyrolactone (2a) in the presence of a base or reacting optically active 2-hydroxybutyrolactone (2b) under Mitsunobu reaction conditions, to thereby form Compound (3); reacting Compound (3) with an alcohol and a halogenating agent, to thereby form Compound (4); dehalogenating Compound (4), to thereby form Compound (5); and de-esterifying Compound (5).
    Type: Application
    Filed: May 30, 2006
    Publication date: March 19, 2009
    Applicant: Kowa Co., Ltd.
    Inventors: Yukiyoshi Yamazaki, Takaaki Araki, Minoru Koura, Kimiyuki Shibuya
  • Patent number: 7504415
    Abstract: The present invention is directed to a preventive or therapeutic agent for a glomerular disease comprising as an active ingredient a compound represented by formula (1): or a salt thereof. The preventive or therapeutic agent for glomerular diseases is useful for preventing or treating a variety of glomerular diseases including chronic glomerular nephritis.
    Type: Grant
    Filed: April 18, 2002
    Date of Patent: March 17, 2009
    Assignees: Kowa Co., Ltd., Nissan Chemical Industries, Ltd.
    Inventors: Takashi Nakagawa, Makoto Suda, Yoichi Yamauchi
  • Publication number: 20090069332
    Abstract: This invention relates to pyridazine derivatives represented by the formula (1): wherein R1 represents a (substituted) aryl group, R2 represents a phenyl group substituted at 4-position by a lower alkoxyl, group or a lower alkylthio group, R3 represents a lower alkoxyl group, a halogenated lower alkyl group, a lower cycloalkyl group, a (substituted) aryl group, a (substituted) aryloxy group, a (substituted) nitrogen-containing heterocyclic ring residue, a (substituted) aminocarbonyl group or a lower alkylcarbonyl group, A represents a single bond, a lower alkylene group or a lower alkenylene group, X represents O or S, and the dashed line indicates that the carbon-carbon bond between the 4-position and the 5-position is a single bond or a double bond, or salts thereof; and also to medicines containing them as effective ingredients.
    Type: Application
    Filed: November 3, 2008
    Publication date: March 12, 2009
    Applicant: Kowa Co., Ltd.
    Inventors: Masao OHKUCHI, Yoshinori Kyotani, Hiromichi Shigyo, Tomoyuki Koshi, Takahiro Kitamura, Tadaaki Ohgiya, Takayuki Matsuda, Yukiyoshi Yamazaki, Natsuyo Kumai, Kyoko Kotaki, Hideo Yoshizaki, Yuriko Habata
  • Publication number: 20090041843
    Abstract: The present invention relates to a pharmaceutical preparation of high photostability which contains pitavastatin, which is an HMG-CoA reductase inhibitor, a salt of pitavastatin, or an ester of pitavastatin. The pharmaceutical preparation contains a pitavastatin compound, titanium oxide, and a colorant having a maximum absorption wavelength of 400 nm to 500 nm.
    Type: Application
    Filed: October 30, 2006
    Publication date: February 12, 2009
    Applicants: KOWA CO., LTD., NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Masato Kozaki, Yoshio Tanizawa, Hiroyuki Kawashima
  • Publication number: 20090042901
    Abstract: The present invention relates to an agent for the prevention/therapy of a disease caused by keratinocyte growth, which comprises, as an active ingredient, a compound represented by General Formula (1): wherein A represents a group selected from groups of the following formulas: X represents CH or N; Y represents CH2 or C?O; Z represents CH or N; R1 represents an alkoxy group; R2 and R3 each independently represent an alkyl group; R4 represents an alkyl group, and a group of the following formula: R5 each independently represent an alkoxy group or an alkylthio group; m represents an integer from 1 to 3; n represents an integer of 1 or 2; and o represents an integer of 1 or 2, or a salt thereof, or a solvate of the compound or the salt.
    Type: Application
    Filed: February 1, 2006
    Publication date: February 12, 2009
    Applicant: KOWA CO., LTD.
    Inventors: Toshiyuki Edano, Yuichiro Tabunoki, Tomoyuki Koshi
  • Publication number: 20090023944
    Abstract: The present invention provides a production intermediate for compound (A-1) and a method for producing the intermediate at high yield and high optical yield. The present invention provides a method for producing compound (3) characterized in that compound (1) is reacted with compound (2) in the presence of a base. (wherein R represents a C1 to C6 alkyl group or a C7 to C8 aralkyl group).
    Type: Application
    Filed: February 28, 2006
    Publication date: January 22, 2009
    Applicant: Kowa Co., Ltd.
    Inventors: Yukiyoshi Yamazaki, Takaaki Araki, Minoru Koura, Kimiyuki Shibuya
  • Publication number: 20090018121
    Abstract: The present invention relates to a preventive and/or therapeutic agent for rheumatoid arthritis. The present invention provides a preventive and/or therapeutic agent for rheumatoid arthritis containing 2-benzyl-5-(4-chlorophenyl)-6-[4-(methylthio)phenyl]-2H-pyridazin-3-one and a COX2 inhibitor.
    Type: Application
    Filed: March 28, 2006
    Publication date: January 15, 2009
    Applicant: Kowa Co., Ltd.
    Inventors: Yuichiro Tabunoki, Tomoyuki Koshi
  • Publication number: 20090005384
    Abstract: The present invention relates to a method for producing a 2-benzyl-5-(4-chlorophenyl)-6-[4-(methylthio)phenyl]-2H-pyridazin-3-one adsorptive porous material characterized by treating a porous material with a halogen-containing organic solvent in which 2-benzyl-5-(4-chlorophenyl)-6-[4-(methylthio)phenyl]-2H-pyridazin-3-one is dissolved. The production method of the present invention is simple and easy, and the obtained adsorptive porous material is excellent in dissolution properties of 2-benzyl-5-(4-chlorophenyl)-6-[4-(methylthio)phenyl]-2H-pyridazin-3-one.
    Type: Application
    Filed: January 24, 2006
    Publication date: January 1, 2009
    Applicant: Kowa Co., Ltd
    Inventors: Hiroshi Miura, Sumie Haruta, Hirofumi Takeuchi