Patents by Inventor Takanori Higashijima

Takanori Higashijima 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: 8754221
    Abstract: The present invention relates to a method for preparing an optically active cyclic alcohol compound represented by general formula [I]: [wherein R represents a hydrogen atom or a protecting group for amino group, and * represents an asymmetric carbon atom.] which comprises a step of subjecting a cyclic ketone compound represented by general formula [II]: [wherein R has the same meaning as defined above.] to asymmetric reduction (A) in the presence of an optically active oxazaborolidine compound and a boron hydride compound, or (B) in the presence of an asymmetric transition metal complex obtained from a transition metal compound and an asymmetric ligand and a hydrogen donor, and relates to said compound.
    Type: Grant
    Filed: January 22, 2013
    Date of Patent: June 17, 2014
    Assignee: Mitsubishi Tanabe Pharma Corporation
    Inventors: Masaki Okamoto, Akira Sakuragi, Yoshikazu Mori, Muneki Kishida, Takanori Higashijima
  • Publication number: 20130237708
    Abstract: The present invention relates to a method for preparing an optically active cyclic alcohol compound represented by general formula [I]: [wherein R represents a hydrogen atom or a protecting group for amino group, and * represents an asymmetric carbon atom.] which comprises a step of subjecting a cyclic ketone compound represented by general formula [II]: [wherein R has the same meaning as defined above.] to asymmetric reduction (A) in the presence of an optically active oxazaborolidine compound and a boron hydride compound, or (B) in the presence of an asymmetric transition metal complex obtained from a transition metal compound and an asymmetric ligand and a hydrogen donor, and relates to said compound.
    Type: Application
    Filed: January 22, 2013
    Publication date: September 12, 2013
    Applicant: Mitsubishi Tanabe Pharma Corporation
    Inventors: Masaki Okamoto, Akira Sakuragi, Yoshikazu Mori, Muneki Kishida, Takanori Higashijima
  • Patent number: 8471028
    Abstract: The present invention relates to a method for preparing an optically active cyclic alcohol compound represented by general formula [I]: [wherein R represents a hydrogen atom or a protecting group for amino group, and * represents an asymmetric carbon atom.] which comprises a step of subjecting a cyclic ketone compound represented by general formula [II]: [wherein R has the same meaning as defined above.] to asymmetric reduction (A) in the presence of an optically active oxazaborolidine compound and a boron hydride compound, or (B) in the presence of an asymmetric transition metal complex obtained from a transition metal compound and an asymmetric ligand and a hydrogen donor, and relates to said compound.
    Type: Grant
    Filed: April 15, 2011
    Date of Patent: June 25, 2013
    Assignee: Mitsubishi Tanabe Pharma Corporation
    Inventors: Masaki Okamoto, Akira Sakuragi, Yoshikazu Mori, Muneki Kishida, Takanori Higashijima
  • Patent number: 8084611
    Abstract: The present invention is to provide a process for preparing optically active tetrahydroquinoline derivatives which can be used for the treatment and/or prevention of diseases such as arteriosclerotic diseases, dyslipidemia and the like, and a process for preparing synthetic intermediates thereof. Specifically, (2R,4S)-2-ethyl-6-trifluoromethyl-1,2,3,4-tetrahydroquinolin-4-ylamine or a salt thereof is prepared with fewer steps without using an optical resolution, and the optically active tetrahydroquinoline derivatives are obtained from the amine compound.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: December 27, 2011
    Assignee: Mitsubishi Tanabe Pharma Corporation
    Inventors: Masaki Okamoto, Akira Sakuragi, Yoshikazu Mori, Takeshi Hamada, Hitoshi Kubota, Yoshinori Nakamura, Takanori Higashijima, Norimitsu Hayashi
  • Patent number: 8076364
    Abstract: The present invention relates to a compound of the general formula (1): wherein, Y is a methylene group, and the like; A is an optionally substituted heterocyclic group, and the like; B is an optionally substituted phenyl group, and the like; R1 is an optionally substituted alkyl group, and the like; and R2 is an optionally substituted amino group, and the like; or a pharmaceutically acceptable derivative thereof, which has an inhibitory activity against cholesteryl ester transfer protein (CETP), thereby being useful for prophylaxis and/or treatment of arteriosclerotic diseases, hyperlipemia or dyslipidemia, and the like.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: December 13, 2011
    Assignee: Mitsubishi Tanabe Pharma Corporation
    Inventors: Yoshinori Nakamura, Norimitsu Hayashi, Takanori Higashijima, Hitoshi Kubota, Kozo Oka
  • Patent number: 7906517
    Abstract: The present invention relates to a compound of the general formula (1): wherein, Y is a methylene group, and the like; A is an optionally substituted heterocyclic group, and the like; B is an optionally substituted phenyl group, and the like; R1 is an optionally substituted alkyl group, and the like; and R2 is an optionally substituted amino group, and the like; or a pharmaceutically acceptable derivative thereof, which has an inhibitory activity against cholesteryl ester transfer protein (CETP), thereby being useful for prophylaxis and/or treatment of arteriosclerotic diseases, hyperlipemia or dyslipidemia, and the like.
    Type: Grant
    Filed: July 28, 2008
    Date of Patent: March 15, 2011
    Assignee: Mitsubishi Tanabe Pharma Corporation
    Inventors: Yoshinori Nakamura, Norimitsu Hayashi, Takanori Higashijima, Hitoshi Kubota, Kozo Oka
  • Patent number: 7781443
    Abstract: A novel compound of the formula (I): wherein R1 is alkoxycarbonyl or the like, R2 is alkyl or the like; R3 is hydrogen or the like; R4 is alkylene or the like; R5 is optionally substituted heterocyclic group; R6, R7, and R8 are independently hydrogen; alkyl, alkoxy, or the like; R10 is optionally substituted aromatic ring, or the like; or a pharmaceutically acceptable salt thereof, which has an inhibitory activity against cholesteryl ester transfer protein (CETP).
    Type: Grant
    Filed: September 27, 2006
    Date of Patent: August 24, 2010
    Assignee: Mitsubishi Tanabe Pharma Corporation
    Inventors: Hitoshi Kubota, Yoshinori Nakamura, Takanori Higashijima, Yasuo Yamamoto, Kozo Oka, Shigeki Igarashi
  • Publication number: 20090292125
    Abstract: The present invention is to provide a process for preparing optically active tetrahydroquinoline derivatives which can be used for the treatment and/or prevention of diseases such as arteriosclerotic diseases, dyslipidemia and the like, and a process for preparing synthetic intermediates thereof. Specifically, (2R,4S)-2-ethyl-6-trifluoromethyl-1,2,3,4-tetrahydroquinolin-4-ylamine or a salt thereof is prepared with fewer steps without using an optical resolution, and the optically active tetrahydroquinoline derivatives are obtained from the amine compound.
    Type: Application
    Filed: March 29, 2007
    Publication date: November 26, 2009
    Applicant: MITSUBISHI TANABE PHARMA CORPORATION
    Inventors: Masaki Okamoto, Akira Sakuragi, Yoshikazu Mori, Takeshi Hamada, Hitoshi Kubota, Yoshinori Nakamura, Takanori Higashijima, Norimitsu Hayashi
  • Publication number: 20090029994
    Abstract: The present invention relates to a compound of the general formula (1): wherein, Y is a methylene group, and the like; A is an optionally substituted heterocyclic group, and the like; B is an optionally substituted phenyl group, and the like; R1 is an optionally substituted alkyl group, and the like; and R2 is an optionally substituted amino group, and the like; or a pharmaceutically acceptable derivative thereof, which has an inhibitory activity against cholesteryl ester transfer protein (CETP), thereby being useful for prophylaxis and/or treatment of arteriosclerotic diseases, hyperlipemia or dyslipidemia, and the like.
    Type: Application
    Filed: July 28, 2008
    Publication date: January 29, 2009
    Applicant: Mitsubishi Tanabe Pharma Corporation
    Inventors: Yoshinori Nakamura, Norimitsu Hayashi, Takanori Higashijima, Hitoshi Kubota, Kozo Oka
  • Publication number: 20090023729
    Abstract: The present invention relates to a compound of the general formula (1): wherein, Y is a methylene group, and the like; A is an optionally substituted heterocyclic group, and the like; B is an optionally substituted heterocyclic group, and the like; R1 is an optionally substituted alkyl group, wherein the alkyl group further may optionally be substituted by an optionally substituted homocyclic group, and the like; and R2 is an optionally substituted amino group, and the like; or a pharmaceutically acceptable derivative thereof, which has an inhibitory activity against cholesteryl ester transfer protein (CETP), thereby being useful for prophylaxis and/or treatment of arteriosclerotic diseases, hyperlipemia or dyslipidemia, and the like.
    Type: Application
    Filed: July 28, 2008
    Publication date: January 22, 2009
    Applicant: Mitsubishi Tanabe Pharma Corporation
    Inventors: Yoshinori Nakamura, Norimitsu Hayashi, Takanori Higashijima, Hitoshi Kubota, Kozo Oka
  • Publication number: 20070032485
    Abstract: A novel compound of the formula (I): wherein R1 is alkoxycarbonyl or the like, R2 is alkyl or the like; R3 is hydrogen or the like; R4 is alkylene or the like; R5 is optionally substituted heterocyclic group; R6, R7, and R8 are independently hydrogen; alky, alkoxy, or the like; R10 is optionally substituted aromatic ring, or the like; or a pharmaceutically acceptable salt thereof, which has an inhibitory activity against cholesteryl ester transfer protein (CETP).
    Type: Application
    Filed: September 27, 2006
    Publication date: February 8, 2007
    Inventors: Hitoshi Kubota, Yoshinori Nakamura, Takanori Higashijima, Yasuo Yamamoto, Kozo Oka, Shigeki Igarashi