Patents by Inventor Yoshihiko Iwanaga

Yoshihiko Iwanaga 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).

  • Method for producing hydroxyphenylcyclohexanol compound
    Patent number: 9315435
    Abstract: A method comprising a step of stirring a composition containing a biphenol compound represented by the formula (1): wherein, R1 and R2 represent each independently an alkyl group having 1 to 3 carbon atoms, and m and n represent each independently an integer of 0 to 2, a secondary alcohol and a nickel catalyst, for producing a hydroxyphenylcyclohexanol compound represented by the formula (2): wherein, R1, R2, m and n represent the same meaning as described above, with the proviso that the above-described secondary alcohol has a different structure from that of the hydroxyphenylcyclohexanol compound represented by the above-described formula (2).
    Type: Grant
    Filed: April 8, 2013
    Date of Patent: April 19, 2016
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Takeshi Hara, Yoshihiko Iwanaga
  • METHOD FOR PRODUCING HYDROXYPHENYLCYCLOHEXANOL COMPOUND
    Publication number: 20150141707
    Abstract: A method comprising a step of stirring a composition containing a biphenol compound represented by the formula (1): wherein, R1 and R2 represent each independently an alkyl group having 1 to 3 carbon atoms, and m and n represent each independently an integer of 0 to 2, a secondary alcohol and a nickel catalyst, for producing a hydroxyphenylcyclohexanol compound represented by the formula (2): wherein, R1, R2, m and n represent the same meaning as described above, with the proviso that the above-described secondary alcohol has a different structure from that of the hydroxyphenylcyclohexanol compound represented by the above-described formula (2).
    Type: Application
    Filed: April 8, 2013
    Publication date: May 21, 2015
    Applicant: Sumitomo Chemical Company, Limited
    Inventors: Takeshi Hara, Yoshihiko Iwanaga
  • Production method of asymmetric copper complex crystal
    Patent number: 8153830
    Abstract: A method of producing an asymmetric copper complex crystal comprising reacting an optically active salicylidene amino alcohol compound with a copper compound, then, performing a crystallization treatment in the presence of an alcohol solvent.
    Type: Grant
    Filed: October 11, 2007
    Date of Patent: April 10, 2012
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Norihiko Hirata, Takanori Yoshimiya, Yoshihiko Iwanaga
  • PRODUCTION METHOD OF ASYMMETRIC COPPER COMPLEX CRYSTAL
    Publication number: 20100094036
    Abstract: A method of producing an asymmetric copper complex crystal comprising reacting an optically active salicylidene amino alcohol compound with a copper compound, then, performing a crystallization treatment in the presence of an alcohol solvent.
    Type: Application
    Filed: October 11, 2007
    Publication date: April 15, 2010
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Norihiko Hirata, Takanori Yoshimiya, Yoshihiko Iwanaga
  • Crystal and solvate of 2-amino-6-benzyloxypurine and production methods thereof
    Patent number: 7345170
    Abstract: The present invention can provide a solvate, a cubic crystal and a columnar crystal of 2-amino-6-benzyloxypurine by crystallization from (1) a solvent containing at least one kind of solvent selected from the group consisting of alcohol and water, (2) alcohol or (3) a water-containing solvent.
    Type: Grant
    Filed: April 3, 2003
    Date of Patent: March 18, 2008
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Taketo Hayashi, Takehiko Kawakami, Yoshihiko Iwanaga, Yosuke Watanabe
  • Crystal and solvate of 2-amino-6-benzyloxypurine and production methods thereof
    Publication number: 20050080098
    Abstract: The present invention can provide a solvate, a cubic crystal and a columnar crystal of 2-amino-6-benzyloxypurine by crystallization from (1) a solvent containing at least one kind of solvent selected from the group consisting of alcohol and water, (2) alcohol or (3) a water-containing solvent.
    Type: Application
    Filed: April 3, 2003
    Publication date: April 14, 2005
    Inventors: Taketo Hayashi, Takehiko Kawakami, Yoshihiko Iwanaga, Yosuke Watanabe