Patents by Inventor Katsuaki Imamura

Katsuaki Imamura 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: 8153631
    Abstract: The present invention provides a triazole compound of the following formula: a prodrug thereof or a pharmaceutically acceptable salt thereof. The above-mentioned triazole compound has superior HSD1 inhibitory activity, and is useful as an HSD1 inhibitor, a therapeutic drug of diabetes or a therapeutic drug of obesity or a therapeutic drug of metabolic syndrome.
    Type: Grant
    Filed: November 19, 2009
    Date of Patent: April 10, 2012
    Assignee: Amgen Inc.
    Inventors: Jay P. Powers, Mario G. Cardozo, Hiroyuki Goto, Kazuhito Harada, Katsuaki Imamura, Makoto Kakutani, Isamu Matsuda, Yasuhiro Ohe, Shinji Yata
  • Patent number: 7803801
    Abstract: The present invention relates to an aminopyridine compound represented by the following general formula (I) or a salt thereof and an Syk inhibitor containing the compound or a salt thereof as an active ingredient. Here, X1, X2, X3, Z, Y1, Y2 represent a carbon atom or a nitrogen atom, R, R1, R5, R6 represent a hydrogen atom, an alkyl group, etc., and R7 represents a hydrogen atom, a halogen atom, a nitro group, a cyano group, —CpH2(p-1)(Ra1)(Ra2)—O—Ra3, —C(?O)—Rd1, a 5- or 6-membered saturated heterocyclic group, an aromatic heterocyclic group, —N(Rh1)(Rh2), etc. The aminopyridine compound of the present invention has not only high Syk inhibitory activity but also properties to selectively inhibit Syk.
    Type: Grant
    Filed: February 28, 2006
    Date of Patent: September 28, 2010
    Assignee: Japan Tobacco, Inc.
    Inventors: Yoshitoshi Kodama, Satoru Noji, Katsuaki Imamura, Ryo Mizojiri, Kenta Aoki, Hideo Takagi, Yuichi Naka, Goro Ito, Kiyotaka Shinoda, Akihito Fujiwara, Kazunori Kurihara, Masaru Tanaka
  • Patent number: 7683059
    Abstract: The present invention provides a triazole compound of the following formula: a prodrug thereof or a pharmaceutically acceptable salt thereof. The above-mentioned triazole compound is useful as a therapeutic drug for the treatment of diabetes, obesity or metabolic syndrome.
    Type: Grant
    Filed: September 5, 2006
    Date of Patent: March 23, 2010
    Assignee: Amgen Inc.
    Inventors: Mario G. Cardozo, Jay P. Powers, Hiroyuki Goto, Kazuhito Harada, Katsuaki Imamura, Makoto Kakutani, Isamu Matsuda, Yasuhiro Ohe, Shinji Yata
  • Publication number: 20100062972
    Abstract: The present invention provides a triazole compound of the following formula: a prodrug thereof or a pharmaceutically acceptable salt thereof. The above-mentioned triazole compound has superior HSD1 inhibitory activity, and is useful as an HSD1 inhibitor, a therapeutic drug of diabetes or a therapeutic drug of obesity or a therapeutic drug of metabolic syndrome.
    Type: Application
    Filed: November 19, 2009
    Publication date: March 11, 2010
    Inventors: JAY P. POWERS, Mario G. CARDOZO, Hiroyuki GOTO, Kazuhito HARADA, Katsuaki IMAMURA, Makoto KAKUTANI, Isamu MATSUDA, Yasuhiro OHE, Shinji YATA
  • Publication number: 20080249084
    Abstract: The present invention provides a triazole compound of the following formula: a prodrug thereof or a pharmaceutically acceptable salt thereof. The above-mentioned triazole compound is useful as a therapeutic drug for the treatment of diabetes, obesity or metabolic syndrome.
    Type: Application
    Filed: October 27, 2004
    Publication date: October 9, 2008
    Inventors: Jay P. Powers, Mario G. Cardozo, Hiroyuki Goto, Kazuhito Harada, Katsuaki Imamura, Makoto Kakutani, Isamu Matsuda, Yasuhiro Ohe, Shinji Yata
  • Publication number: 20060205731
    Abstract: The present invention relates to an aminopyridine compound represented by the following general formula (I) or a salt thereof and an Syk inhibitor containing the compound or a salt thereof as an active ingredient. Here, X1, X2, X3, Z, Y1, Y2 represent a carbon atom or a nitrogen atom, R, R1, R5, R6 represent a hydrogen atom, an alkyl group, etc., and R7 represents a hydrogen atom, a halogen atom, a nitro group, a cyano group, —CpH2(p-1)(Ra1)(Ra2)—O—Ra3, —C(?O)—Rd1, a 5- or 6-membered saturated heterocyclic group, an aromatic heterocyclic group, —N(Rh1)(Rh2), etc. The aminopyridine compound of the present invention has not only high Syk inhibitory activity but also properties to selectively inhibit Syk.
    Type: Application
    Filed: February 28, 2006
    Publication date: September 14, 2006
    Applicant: JAPAN TOBACCO INC.
    Inventors: Yoshitoshi Kodama, Satoru Noji, Katsuaki Imamura, Ryo Mizojiri, Kenta Aoki, Hideo Takagi, Yuichi Naka, Goro Ito, Kiyotaka Shinoda, Akihito Fujiwara, Kazunori Kurihara, Masaru Tanaka