Patents by Inventor Tetsuji Ozawa

Tetsuji Ozawa 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: 8022192
    Abstract: The present invention relates to a method for preparing the glucopyranosyloxypyrazole derivatives which are useful as agents for the prevention or treatment of a disease associated with hyperglycemia such as diabetes, diabetic complications, obesity or the like. A glucopyranosyloxypyrazole derivative can be easily and efficiently prepared by allowing a benzylpyrazole derivative represented by the general formula: wherein R1, R2, R3, R4 and R5 may be the same or different, for example each of them is a hydrogen atom, a halogen atom or an alkyl, alkoxy, arylmethyloxy group or the like, R6 is an alkyl group, for example R7 is a hydrogen atom or an alkyl, alkoxy, arylmethyloxy group or the like, to react with a compound represented by the general formula: wherein as an example, PG1 is a pivaloyl group or the like, as an example, X1 is a bromine atom or the like, therefore the present invention is extremely useful as a method for preparing pharmaceutical compounds.
    Type: Grant
    Filed: March 16, 2006
    Date of Patent: September 20, 2011
    Assignee: Kissei Pharmaceutical Co., Ltd.
    Inventors: Kiyoshi Kasai, Tetsuji Ozawa, Nobuhiko Fushimi, Hidetoshi Isawa, Ken Kikuchi, Masahiro Kobayashi, Junichi Sonehara, Minoru Kubota
  • Publication number: 20110201793
    Abstract: The present invention relates to a method for preparing the glucopyranosyloxypyrazole derivatives which are useful as agents for the prevention or treatment of a disease associated with hyperglycemia such as diabetes, diabetic complications, obesity or the like. A glucopyranosyloxypyrazole derivative can be easily and efficiently prepared by allowing a benzylpyrazole derivative represented by the general formula: wherein R1, R2, R3, R4 and R5 may be the same or different, for example each of them is a hydrogen atom, a halogen atom or an alkyl, alkoxy, arylmethyloxy group or the like, R6 is an alkyl group, for example R7 is a hydrogen atom or an alkyl, alkoxy, arylmethyloxy group or the like, to react with a compound represented by the general formula: wherein as an example, PG1 is a pivaloyl group or the like, as an example, X1 is a bromine atom or the like, therefore the present invention is extremely useful as a method for preparing pharmaceutical compounds.
    Type: Application
    Filed: April 25, 2011
    Publication date: August 18, 2011
    Applicant: KISSEI PHARMACEUTICAL CO., LTD.
    Inventors: Kiyoshi KASAI, Tetsuji OZAWA, Nobuhiko FUSHIMI, Hidetoshi ISAWA, Ken KIKUCHI, Masahiro KOBAYASHI, Junichi SONEHARA, Minoru KUBOTA
  • Patent number: 7579507
    Abstract: Crystals of a salt of 4?-{2-[(1S,2R)-2-hydroxy-2-(4-hydroxyphenyl)-1-methylethylamino]ethoxy}-3-isopropyl-3?,5?-dimethylbiphenyl-4-carboxylic acid. The ? type, ? type and ? type crystals produced by treating hydrochloride of 4?-{2-[(1S,2R)-2-hydroxy-2-(4-hydroxyphenyl)-1-methylethylamino]ethoxy}-3-isopropyl-3?,5?-dimethylbiphenyl-4-carboxylic acid with specified solvents, which can be discriminated by the characteristic diffraction peaks of powder X-ray diffractometry and the like.
    Type: Grant
    Filed: October 12, 2007
    Date of Patent: August 25, 2009
    Assignee: Kissei Pharmaceutical Co., Ltd.
    Inventors: Kiyoshi Kasai, Takehiro Ishikawa, Tetsuji Ozawa, Koji Kamata, Ritsu Suzuki, Hideki Takeuchi
  • Publication number: 20090062518
    Abstract: The present invention relates to a method for preparing the glucopyranosyloxypyrazole derivatives which are useful as agents for the prevention or treatment of a disease associated with hyperglycemia such as diabetes, diabetic complications, obesity or the like. A glucopyranosyloxypyrazole derivative can be easily and efficiently prepared by allowing a benzylpyrazole derivative represented by the general formula: wherein R1, R2, R3, R4 and R5 may be the same or different, for example each of them is a hydrogen atom, a halogen atom or an alkyl, alkoxy, arylmethyloxy group or the like, R6 is an alkyl group, for example R7 is a hydrogen atom or an alkyl, alkoxy, arylmethyloxy group or the like, to react with a compound represented by the general formula: wherein as an example, PG1 is a pivaloyl group or the like, as an example, X1 is a bromine atom or the like, therefore the present invention is extremely useful as a method for preparing pharmaceutical compounds.
    Type: Application
    Filed: March 16, 2006
    Publication date: March 5, 2009
    Applicant: Kissei Pharmaceutical Co., Ltd,
    Inventors: Kiyoshi Kasai, Tetsuji Ozawa, Nobuhiko Fushimi, Hidetoshi Isawa, Ken Kikuchi, Masahiro Kobayashi, Junichi Sonehara, Minoru Kubota
  • Publication number: 20090030218
    Abstract: The present invention provides an industrial method for preparing aminoalcohol derivatives (I) having a biphenyl group, biphenyloxyacetaldehyde derivatives which are used therefore, preparing methods thereof, and intermediates used for the preparing method. The present invention also provides a preparing method including processes for preparing a 3-substituted biphenylcarboxylic acid derivative represented by the following general formula: by allowing a 3-fluorobiphenylcarboxylic acid derivative prepared from a 3-fluorobiphenylcarbonitrile derivative which can be prepared by allowing a 4-halophenol derivative to react with a 2-fluorobenzonitrile derivative which is substituted by a leaving group at 4-position to react with an organometallic reagent.
    Type: Application
    Filed: May 17, 2006
    Publication date: January 29, 2009
    Applicant: KISSEI PHARMACEUTICAL CO., LTD.
    Inventors: Kiyoshi Kasai, Minoru Kubota, Ritsu Suzuki, Tetsuji Ozawa, Takehiro Ishikawa, Makoto Kobayashi, Junichi Sonehara, Masahiro Kobayashi
  • Publication number: 20080076826
    Abstract: Crystals of a salt of 4?-{2-[(1S,2R)-2-hydroxy-2-(4-hydroxyphenyl)-1-methylethylamino]ethoxy}-3-isopropyl-3?, 5?-dimethylbiphenyl-4-carboxylic acid. The ? type, ? type and ? type crystals produced by treating hydrochloride of 4?-{2-[(1S,2R)-2-hydroxy-2-(4-hydroxyphenyl)-1-methylethyl-amino]ethoxy}-3-isopropyl-3?,5?-dimethylbiphenyl-4-carboxylic acid with specified solvents, which can be discriminated by the characteristic diffraction peaks of powder X-ray diffractometry and the like.
    Type: Application
    Filed: October 12, 2007
    Publication date: March 27, 2008
    Applicant: KISSEI PHARMACEUTICAL CO., LTD.
    Inventors: Kiyoshi KASAI, Takehiro ISHIKAWA, Tetsuji OZAWA, Koji KAMATA, Ritsu SUZUKI, Hideki TAKEUCHI
  • Patent number: 7196203
    Abstract: The present invention provides novel phenol derivatives represented by the formula: wherein the carbon atom marked with (S) represents a carbon atom in S configuration; Z represents the group represented by the formula: or the formula: wherein the carbon atoms marked with (R) represents a carbon atom in R configuration, and a method to produce a phenol derivative represented by the formula (A): (wherein the carbon atom marked with (R) and (S) have the same meanings as defined above) which comprises using any of those derivatives as an intermediate therefore.
    Type: Grant
    Filed: June 26, 2003
    Date of Patent: March 27, 2007
    Assignee: Kissei Pharmaceutical Co., Ltd.
    Inventors: Toshiaki Yamaguchi, Masaaki Ban, Takashi Yanagi, Ken Kikuchi, Minoru Kubota, Tetsuji Ozawa
  • Publication number: 20050209486
    Abstract: The present invention provides novel phenol derivatives represented by the formula: wherein the carbon atom marked with (S) represents a carbon atom in S configuration; Z represents the group represented by the formula: or the formula: wherein the carbon atoms marked with (R) represents a carbon atom in R configuration, and a method to produce a phenol derivative represented by the formula (A): (wherein the carbon atom marked with (R) and (S) have the same meanings as defined above) which comprises using any of those derivatives as an intermediate therefore.
    Type: Application
    Filed: June 26, 2003
    Publication date: September 22, 2005
    Inventors: Toshiaki Yamaguchi, Masaaki Ban, Takashi Yanagi, Ken Kikuchi, Minoru Kubota, Tetsuji Ozawa