Patents by Inventor Toyokazu Haga

Toyokazu Haga 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: 8053580
    Abstract: It is an object of the present invention to provide (1) a process for manufacturing alkali metal salts of 2-[{4-(3-methoxypropoxy)-3-methylpyridin-2-yl}methylsulfinyl]-1H-benzimidazole which are useful as gastric acid secretion inhibitors, anti-ulcer agents and other drugs and (2) salts of 2-[{4-(3-methoxypropoxy)-3-methylpyridin-2-yl}methylsulfinyl]-1H-benzimidazole with amines which are intermediates for the production of the alkali metal salts, and a process for manufacturing the same. According to the present invention, disclosed are salts represented by the following formula (I): (wherein A+ represents an isopropylammonium ion, sec-butylammonium ion or cyclopentylammonium ion).
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: November 8, 2011
    Assignee: Eisal R&D Management Co., Ltd.
    Inventors: Hiroyuki Yokoi, Masanori Mizuno, Toyokazu Haga
  • Patent number: 7829718
    Abstract: It is an object of the present invention to provide (1) a process for manufacturing alkali metal salts of 2-[{4-(3-methoxypropoxy)-3-methylpyridin-2-yl}methylsulfinyl]-1H-benzimidazole which are useful as gastric acid secretion inhibitors, anti-ulcer agents and other drugs and (2) salts of 2-[{4-(3-methoxypropoxy)-3-methylpyridin-2-yl}methylsulfinyl]-1H-benzimidazole with amines which are intermediates for the production of the alkali metal salts, and a process for manufacturing the same. According to the present invention, disclosed are salts represented by the following formula (I): (wherein A+ represents an isopropylammonium ion, sec-butylammonium ion or cyclopentylammonium ion).
    Type: Grant
    Filed: August 5, 2005
    Date of Patent: November 9, 2010
    Assignee: Eisai R&D Management Co., Ltd.
    Inventors: Hiroyuki Yokoi, Masanori Mizuno, Toyokazu Haga
  • Publication number: 20090264659
    Abstract: It is an object of the present invention to provide (1) a process for manufacturing alkali metal salts of 2-[{4-(3-methoxypropoxy)-3-methylpyridin-2-yl}methylsulfinyl]-1H-benzimidazole which are useful as gastric acid secretion inhibitors, anti-ulcer agents and other drugs and (2) salts of 2-[{4-(3-methoxypropoxy)-3-methylpyridin-2-yl}methylsulfinyl]-1H-benzimidazole with amines which are intermediates for the production of the alkali metal salts, and a process for manufacturing the same. According to the present invention, disclosed are salts represented by the following formula (I): (wherein A+ represents an isopropylammonium ion, sec-butylammonium ion or cyclopentylammonium ion).
    Type: Application
    Filed: June 24, 2009
    Publication date: October 22, 2009
    Inventors: Hiroyuki YOKOI, Masanori MIZUNO, Toyokazu HAGA
  • Publication number: 20090264658
    Abstract: It is an object of the present invention to provide (1) a process for manufacturing alkali metal salts of 2-[{4-(3-methoxypropoxy)-3-methylpyridin-2-yl}methylsulfinyl]-1H-benzimidazole which are useful as gastric acid secretion inhibitors, anti-ulcer agents and other drugs and (2) salts of 2-[{4-(3-methoxypropoxy)-3-methylpyridin-2-yl}methylsulfinyl]-1H-benzimidazole with amines which are intermediates for the production of the alkali metal salts, and a process for manufacturing the same. According to the present invention, disclosed are salts represented by the following formula (I): (wherein A+ represents an isopropylammonium ion, sec-butylammonium ion or cyclopentylammonium ion).
    Type: Application
    Filed: June 24, 2009
    Publication date: October 22, 2009
    Inventors: Hiroyuki YOKOI, Masanori MIZUNO, Toyokazu HAGA
  • Publication number: 20090149647
    Abstract: Discloses is a process for producing ?-D-glucopyranose, 3-O-decyl-2-deoxy-6-O-[2-deoxy-3-O-[(3R)-3-methoxydecyl]-6-O-methyl-2-[(11Z)-1-oxo-11-octadecenyl]amino]-4-O-phosphono-?-D-glucopyranosyl]-2-[(1,3-dioxotetradecyl)amino]- or 1-(dihydrogen phosphate) tetrasodium salt which is useful as an active ingredient of a pharmaceutical or an intermediate for the synthesis thereof, which is environment-friendly and excellent in safety, operationality and reproducibility. A process for producing a compound represented by the formula (I) comprising the steps of reacting a compound represented by the formula (VIII) with a palladium catalyst in the presence of a nucleopholic agent and treating the product with a sodium source.
    Type: Application
    Filed: August 29, 2006
    Publication date: June 11, 2009
    Applicant: Eisai R&D Management Co., Ltd.
    Inventors: Katsuya Tagami, Keizo Sato, Kimihiro Matsuo, Taichi Abe, Toyokazu Haga
  • Publication number: 20080090877
    Abstract: It is an object of the present invention to provide (1) a process for manufacturing alkali metal salts of 2-[{4-(3-methoxypropoxy)-3-methylpyridin-2-yl}methylsulfinyl]-1H-benzimidazole which are useful as gastric acid secretion inhibitors, anti-ulcer agents and other drugs and (2) salts of 2-[{4-(3-methoxypropoxy)-3-methylpyridin-2-yl}methylsulfinyl]-1H-benzimidazole with amines which are intermediates for the production of the alkali metal salts, and a process for manufacturing the same. According to the present invention, disclosed are salts represented by the following formula (I): (wherein A+ represents an isopropylammonium ion, sec-butylammonium ion or cyclopentylammonium ion).
    Type: Application
    Filed: August 5, 2005
    Publication date: April 17, 2008
    Inventors: Hiroyuki Yokoi, Masanori Mizuno, Toyokazu Haga
  • Patent number: 6841549
    Abstract: The present invention provides a preventive or therapeutic agent for diabetes mellitus and diabetic complications, which is a new type based on an adenosine A2 receptor antagonist action. That is, it provides a novel condensed imidazole compound which has an adenosine A2 receptor antagonist action, is effective for preventing or treating diabetes mellitus and diabetic complications, and is represented by the formula (I); (wherein R1 represents e.g. an amino group which may be substituted with an alkyl group; R2 represents e.g. hydrogen atom, an alkyl group, a cycloalkyl group or an alkyl group, alkenyl group or alkynyl group which may be substituted with hydrox etc.; R3 represents e.g. an optionally substituted alkyl group, alkenyl group, alkynyl group, aryl group, heteroaryl group, pyridinone group, pyrimidinone group or piperadinone group; Ar represents e.g.
    Type: Grant
    Filed: June 30, 2000
    Date of Patent: January 11, 2005
    Assignee: Eisai Co., Ltd.
    Inventors: Osamu Asano, Hitoshi Harada, Seiji Yoshikawa, Nobuhisa Watanabe, Takashi Inoue, Tatsuo Horizoe, Nobuyuki Yasuda, Kaya Ohashi, Hiroe Minami, Junsaku Nagaoka, Manabu Murakami, Seiichi Kobayashi, Isao Tanaka, Tsutomu Kawata, Naoyuki Shimomura, Hiroshi Akamatsu, Naoki Ozeki, Toshikazu Shimizu, Kenji Hayashi, Toyokazu Haga, Shigeto Negi, Toshihiko Naito
  • Publication number: 20040073045
    Abstract: A pyrrolidine derivative, which is an intermediate for a quinuclidine derivate side chain useful as a squalene synthase inhibitor, and producing method thereof are disclosed.
    Type: Application
    Filed: September 9, 2003
    Publication date: April 15, 2004
    Inventors: Manabu Sasyou, Toyokazu Haga, Akio Kayano, Shigeto Negi, Hiroyuki Naka
  • Patent number: 6620945
    Abstract: The present invention provides a process for producing optically active 3-hydroxy-4-methoxypyrrolidine, which is an intermediate for synthesizing a quinuclidine derivative useful as a squalene synthetase inhibitor, a salt thereof, or a hydrate thereof by subjecting a pyrrolidine derivative represented by the following formula (1-4): wherein R3a and R3b are different and each of R3a and R3b represents a hydrogen atom or a methyl group, to optical division purification by using an optically active dibenzoyltartaric acid derivative or the like.
    Type: Grant
    Filed: May 8, 2002
    Date of Patent: September 16, 2003
    Assignees: Eisai Co., Ltd., Yamakawa Chemical Industry Co., Ltd.
    Inventors: Toyokazu Haga, Akio Kayano, Manabu Sasyou, Shigeto Negi, Hiroyuki Naka, Hirofumi Noda, Ken-ichi Sakai
  • Publication number: 20030004208
    Abstract: The present invention provides a process for producing optically active 3-hydroxy-4-methoxypyrrolidine, which is an intermediate for synthesizing a quinuclidine derivative useful as a squalene synthetase inhibitor, a salt thereof, or a hydrate thereof by subjecting a pyrrolidine derivative represented by the following formula (1-4): 1
    Type: Application
    Filed: May 8, 2002
    Publication date: January 2, 2003
    Inventors: Toyokazu Haga, Akio Kayano, Manabu Sasyou, Shigeto Negi, Hiroyuki Naka, Hirofumi Noda, Ken-ichi Sakai