Patents by Inventor Masaya Sawamura

Masaya Sawamura 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: 10010879
    Abstract: Provided are: a polymer-supported phosphane compound exhibiting excellent catalytic reaction activity; a complex including the compound and a transition metal; and a catalyst including the complex. This polymer compound includes: units of threefold styrene cross-linked phosphane; and styrene units having substituent groups (R) in position 4 (provided that R represents hydrogen, a C1-6 lower alkyl group, a C1-6 lower alkoxy group, or a polar functional group). In the formula in which the polymer compound includes structure (1), PS represents a polystyrene unit chain including the styrene units having the substituent groups (R). The complex includes the polymer and a transition metal. The catalyst for an organic compound coupling reaction includes the complex.
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: July 3, 2018
    Assignee: Tosoh Organic Chemical Co., Ltd
    Inventors: Masaya Sawamura, Tomohiro Iwai, Tomoya Harada
  • Publication number: 20160136628
    Abstract: Provided are: a polymer-supported phosphane compound exhibiting excellent catalytic reaction activity; a complex including the compound and a transition metal; and a catalyst including the complex. This polymer compound includes: units of threefold styrene cross-linked phosphane; and styrene units having substituent groups (R) in position 4 (provided that R represents hydrogen, a C1-6 lower alkyl group, a C1-6 lower alkoxy group, or a polar functional group). In the formula in which the polymer compound includes structure (1), PS represents a polystyrene unit chain including the styrene units having the substituent groups (R). The complex includes the polymer and a transition metal. The catalyst for an organic compound coupling reaction includes the complex.
    Type: Application
    Filed: March 6, 2014
    Publication date: May 19, 2016
    Inventors: Masaya SAWAMURA, Tomohiro IWAI, Tomoya HARADA
  • Patent number: 7838697
    Abstract: A manufacturing method for one of, or a mixture of, an optically active allylboron compound and racemic or optically active boryl cyclopropane, including a coupling reaction, in the presence of a catalyst, between allyl compound and diboron compound. It is preferred that a copper (I) complex is used as the catalyst. It is preferred that a counterion of the copper (I) complex is an alkoxide or a hydride. It is preferred that the copper (I) complex has a phosphine ligand. It is preferred that the phosphine ligand is a chiral phosphine ligand.
    Type: Grant
    Filed: April 10, 2008
    Date of Patent: November 23, 2010
    Assignee: Nippon Chemical Industrial Co., Ltd.
    Inventors: Masaya Sawamura, Hajime Ito
  • Publication number: 20080262257
    Abstract: A manufacturing method for one of, or a mixture of, an optically active allylboron compound and racemic or optically active boryl cyclopropane, including a coupling reaction, in the presence of a catalyst, between allyl compound and diboron compound. It is preferred that a copper (I) complex is used as the catalyst. It is preferred that a counterion of the copper (I) complex is an alkoxide or a hydride. It is preferred that the copper (I) complex has a phosphine ligand. It is preferred that the phosphine ligand is a chiral phosphine ligand.
    Type: Application
    Filed: April 10, 2008
    Publication date: October 23, 2008
    Applicant: NIPPON CHEMICAL INDUSTRIAL CO., LTD
    Inventors: Masaya SAWAMURA, Hajime ITO
  • Patent number: 7018599
    Abstract: A novel means for DNA compaction is provided. The object is accomplished by providing a fullerene derivative having 1 to 4 nitrogen-containing hydrophilic side chain(s) or its salt for DNA compaction. DNA compaction can be achieved effectively, and application to gene therapy is also expected.
    Type: Grant
    Filed: May 17, 2004
    Date of Patent: March 28, 2006
    Assignee: Astellas Pharma Inc.
    Inventors: Eiichi Nakamura, Masaya Sawamura, Hiroyuki Isobe
  • Publication number: 20040214218
    Abstract: A novel means for DNA compaction is provided.
    Type: Application
    Filed: May 17, 2004
    Publication date: October 28, 2004
    Applicants: Fujisawa Pharmaceutical Co., Ltd., Eiichi NAKAMURA
    Inventors: Eiichi Nakamura, Masaya Sawamura, Hiroyuki Isobe
  • Patent number: 6765098
    Abstract: A novel means for DNA compaction is provided. The object is accomplished by providing a fullerene derivative having 1 to 4 nitrogen-containing hydrophilic side chain(s) or its salt for DNA compaction. DNA compaction can be achieved effectively, and application to gene therapy is also expected.
    Type: Grant
    Filed: November 17, 2000
    Date of Patent: July 20, 2004
    Assignees: Fujisawa Pharmaceutical Co., Ltd
    Inventors: Eiichi Nakamura, Masaya Sawamura, Hiroyuki Isobe
  • Patent number: 6271425
    Abstract: A novel process for producing alcohols, characterized by reacting an organic halide represented by the formula R—X (wherein R means an organic residue and X means a halogen atom) with oxygen molecules in the presence of an organotin compound and a reducing agent and optionally in the presence of a free-radical inhibitor in an amount up to 0.3 equivalent based on the organic halide to obtain an alcohol represented by the general formula R—OH (wherein R has the same meaning as the above).
    Type: Grant
    Filed: September 7, 1999
    Date of Patent: August 7, 2001
    Assignees: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Eiichi Nakamura, Masaya Sawamura