Patents by Inventor Kazushi Mashima

Kazushi Mashima 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).

  • Publication number: 20240025873
    Abstract: An object of the present invention is to provide a novel method for producing a ketone derivative, and more specifically, a method for producing a ketone derivative (I) represented by formula (I), including mixing a thioester derivative (II) represented by formula (II), a Grignard reagent (III) represented by formula (III) and a copper salt to form a ketone derivative (I).
    Type: Application
    Filed: October 1, 2021
    Publication date: January 25, 2024
    Applicants: TOKUYAMA CORPORATION, OSAKA UNIVERSITY
    Inventors: Masahiko SEKI, Kazushi MASHIMA, Hayato TSURUGI, Daiki KATO, Tomoya MURASE, Jalindar Bhausaheb TALODE
  • Patent number: 11377415
    Abstract: A method for converting an N,N-dialkylamide compound into an ester compound includes using a fourth period transition metal complex as a catalyst. The fourth period transition metal complex is obtained by a reaction of a precursor having a fourth period transition metal with a nitrogen-containing compound or a phosphorus-containing compound.
    Type: Grant
    Filed: February 28, 2019
    Date of Patent: July 5, 2022
    Assignees: TAKASAGO INTERNATIONAL CORPORATION, OSAKA UNIVERSITY
    Inventors: Kazushi Mashima, Haruki Nagae, Takahiro Hirai, Daiki Kato, Shusei Soma, Shinya Akebi, Shoko Akiyama, Kazuhiko Matsumura, Yoshimasa Matsushima
  • Publication number: 20200399200
    Abstract: A method for converting an N,N-dialkylamide compound into an ester compound includes using a fourth period transition metal complex as a catalyst. The fourth period transition metal complex is obtained by a reaction of a precursor having a fourth period transition metal with a nitrogen-containing compound or a phosphorus-containing compound.
    Type: Application
    Filed: February 28, 2019
    Publication date: December 24, 2020
    Applicants: TAKASAGO INTERNATIONAL CORPORATION, OSAKA UNIVERSITY
    Inventors: Kazushi MASHIMA, Haruki NAGAE, Takahiro HIRAI, Daiki KATO, Shusei SOMA, Shinya AKEBI, Shoko AKIYAMA, Kazuhiko MATSUMURA, Yoshimasa MATSUSHIMA
  • Publication number: 20170348681
    Abstract: An organic reductant, in particular an organo silicon reductant suitable for activating supported catalysts of the type MOnEm, wherein E is S and/or Se, in particular MOn, wherein M is W, Mo or Re, is described as well as its use in metathesis reactions. The reduced catalysts are able to metathesize olefins at low temperatures and are therefore also suitable for metathesis of functionalized olefins.
    Type: Application
    Filed: December 15, 2015
    Publication date: December 7, 2017
    Inventors: Christophe Coperet, Victor Mougel, Kazushi Mashima, Hayato Tsurugi, Haruki Nagae
  • Patent number: 9012649
    Abstract: Disclosed is a method for producing an optically active 2-arylpiperidinium salt, comprising asymmetrically hydrogenating a pyridinium salt in the presence of an iridium complex and hydrogen, the 2-arylpiperidinium salt being represented by the following general formula (1): wherein R1, R2, X, *, and m are as described in Description, the pyridinium salt being represented by the following general formula (2): wherein R1, R2, X, and m are as described in Description, and the iridium complex being represented by the following general formula (3): IrH(Z)(Q)(PP*)??(3), wherein Z, PP*, and Q are as described in Description, or the following general formula (4): [{IrH(PP*)}2(?-Z)3]Z??(4), wherein Z and PP* are as described in Description.
    Type: Grant
    Filed: January 30, 2014
    Date of Patent: April 21, 2015
    Assignee: Takasago International Corporation
    Inventors: Kazushi Mashima, Yusuke Kita, Takuto Nagano, Atsuhiro Iimuro, Kenta Yamaji, Shoji Hida, Kiyoto Hori, Hideki Nara
  • Publication number: 20140213792
    Abstract: Disclosed is a method for producing an optically active 2-arylpiperidinium salt, comprising asymmetrically hydrogenating a pyridinium salt in the presence of an iridium complex and hydrogen, the 2-arylpiperidinium salt being represented by the following general formula (1): wherein R1, R2, X, *, and m are as described in Description, the pyridinium salt being represented by the following general formula (2): wherein R1, R2, X, and m are as described in Description, and the iridium complex being represented by the following general formula (3): IrH(Z)(Q)(PP*)??(3), wherein Z, PP*, and Q are as described in Description, or the following general formula (4): [{IrH(PP*)}2(?-Z)3]Z??(4), wherein Z and PP* are as described in Description.
    Type: Application
    Filed: January 30, 2014
    Publication date: July 31, 2014
    Applicant: TAKASAGO INTERNATIONAL CORPORATION
    Inventors: Kazushi MASHIMA, Yusuke KITA, Takuto NAGANO, Atsuhiro IIMURO, Kenta YAMAJI, Shoji HIDA, Kiyoto HORI, Hideki NARA
  • Patent number: 8431709
    Abstract: Disclosed is a selective ester production process of an alcoholic hydroxyl group, which proceeds under chemically mild conditions, while having adequate environmental suitability, operability and economical efficiency. Specifically disclosed is a process for producing an ester compound, which is characterized in that an alcohol and a carboxylic acid ester compound are reacted in the presence of a compound containing zinc element, thereby selectively acylating a hydroxyl group of the alcohol.
    Type: Grant
    Filed: October 10, 2008
    Date of Patent: April 30, 2013
    Assignee: Takasago International Corporation
    Inventors: Kazushi Mashima, Takashi Ohshima, Takanori Iwasaki, Noboru Sayo
  • Patent number: 7977271
    Abstract: A multiple-metal complex-containing compound in accordance with an embodiment has a plurality of metal complexes in each of which a ligand is coordinated to one metal atom or a plurality of metal atoms of the same kind. The plurality of metal complexes are bound to each other via a polydentate ligand that substitutes partially the ligands of the two or more metal complexes, and have 2 to 1000 metal atoms.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: July 12, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kazushi Mashima, Masato Ohashi, Akihiro Yagyu, Hirohito Hirata
  • Publication number: 20110098479
    Abstract: The invention relates to a method for producing an azoline compound represented by the general formula (3): wherein R1 represents an optionally substituted hydrocarbon group, an optionally substituted alkoxy group, an optionally substituted alkoxycarbonyl group, a halogen atom, a substituted amino group, a substituted carbamoyl group or an optionally substituted heterocyclic group; R3, R4, R5 and R6 may be the same or different and each represents a hydrogen atom, an optionally substituted hydrocarbon group, an optionally substituted alkoxy group, an optionally substituted alkoxycarbonyl group, a halogen atom, a substituted amino group, a substituted carbamoyl group or an optionally substituted heterocyclic group; two arbitrary groups selected from R3, R4, R5 and R6 may bond to each other to form a ring; and Z1 represents an oxygen atom, a sulfur atom or a selenium atom; comprising reacting a carboxylic acid or a carboxylic acid derivative represented by the general formula (1): R1CO2R2 ??(1) wherein R
    Type: Application
    Filed: December 29, 2010
    Publication date: April 28, 2011
    Inventors: KAZUSHI MASHIMA, Takashi Ohshima, Takanori Iwasaki, Hironori Maeda, Kenya Ishida
  • Patent number: 7888513
    Abstract: The invention relates to a method for producing an azoline compound represented by the general formula (3): wherein R1 represents an optionally substituted hydrocarbon group, an optionally substituted alkoxy group, an optionally substituted alkoxycarbonyl group, a halogen atom, a substituted amino group, a substituted carbamoyl group or an optionally substituted heterocyclic group; R3, R4, R5 and R6 may be the same or different and each represents a hydrogen atom, an optionally substituted hydrocarbon group, an optionally substituted alkoxy group, an optionally substituted alkoxycarbonyl group, a halogen atom, a substituted amino group, a substituted carbamoyl group or an optionally substituted heterocyclic group; two arbitrary groups selected from R3, R4, R5 and R6 may bond to each other to form a ring; and Z1 represents an oxygen atom, a sulfur atom or a selenium atom; comprising reacting a carboxylic acid or a carboxylic acid derivative represented by the general formula (1): R1CO2R2??(1) wherein R1
    Type: Grant
    Filed: December 4, 2006
    Date of Patent: February 15, 2011
    Assignee: Takasago International Corporation
    Inventors: Kazushi Mashima, Takashi Ohshima, Takanori Iwasaki, Hironori Maeda, Kenya Ishida
  • Publication number: 20110021345
    Abstract: A multiple-metal complex-containing compound in accordance with an embodiment has a plurality of metal complexes in each of which a ligand is coordinated to one metal atom or a plurality of metal atoms of the same kind. The plurality of metal complexes are bound to each other via a polydentate ligand that substitutes partially the ligands of the two or more metal complexes, and have 2 to 1000 metal atoms.
    Type: Application
    Filed: September 9, 2010
    Publication date: January 27, 2011
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kazushi MASHIMA, Masato OHASHI, Akihiro YAGYU, Hirohito HIRATA
  • Publication number: 20100249422
    Abstract: Disclosed is a selective ester production process of an alcoholic hydroxyl group, which proceeds under chemically mild conditions, while having adequate environmental suitability, operability and economical efficiency. Specifically disclosed is a process for producing an ester compound, which is characterized in that an alcohol and a carboxylic acid ester compound are reacted in the presence of a compound containing zinc element, thereby selectively acylating a hydroxyl group of the alcohol.
    Type: Application
    Filed: October 10, 2008
    Publication date: September 30, 2010
    Applicant: Takasago International Corporation
    Inventors: Kazushi Mashima, Takashi Ohshima, Takanori Iwasaki, Noboru Sayo
  • Publication number: 20100155650
    Abstract: An amidine-carboxylic acid complex in accordance with an aspect of the invention has an amidine ligand and a carboxylic acid ligand that are coordinated to one metal atom or a plurality of metal atoms of the same element. A multiple-complex-containing compound, i.e. a bridged polynuclear complex, in accordance with the aspect of the invention is formally derived from two or more such amidine-carboxylic acid complexes, linked by a polyvalent carboxylic acid ligand. The bridged polynuclear complex may be used in a production method to support metal (oxide) clusters on a porous support by impregnating these with a solution thereof, followed by drying and firing.
    Type: Application
    Filed: June 7, 2007
    Publication date: June 24, 2010
    Inventors: Kazushi Mashima, Masato Ohashi, Akihiro Yagyu, Hirohito Hirata
  • Publication number: 20100152029
    Abstract: A multiple-metal complex-containing compound in accordance with an embodiment has a plurality of metal complexes in each of which a ligand is coordinated to one metal atom or a plurality of metal atoms of the same kind. The plurality of metal complexes are bound to each other via a polydentate ligand that substitutes partially the ligands of the two or more metal complexes, and have 2 to 1000 metal atoms.
    Type: Application
    Filed: February 28, 2007
    Publication date: June 17, 2010
    Inventors: Kazushi Mashima, Masato Ohashi, Akihiro Yagyu, Hirohito Hirata
  • Patent number: 7642357
    Abstract: The present invention has as its object to provide an iridium complex represented by the general formula: [(I r H L1 L2)2(??X1)(??X2)(??X3)]X4??(1) (wherein L1 and L2 may be the same or different and each represent a monodendate neutral ligand, or each cooperate with the other to form a bidendate neutral ligand; X1, X2 and X3 may be the same or different, and each represent a halogen atom; and X4 is a counter-anion). Also, the present invention provides a novel catalyst which can achieve excellent performance as a catalyst for asymmetric synthesis, especially asymmetric hydrogenation, in terms of chemical selectivity, enantioselectivity and catalytic activity, and the like.
    Type: Grant
    Filed: August 27, 2004
    Date of Patent: January 5, 2010
    Assignee: Takasago International Corporation
    Inventors: Kazushi Mashima, Tsuneaki Yamagata
  • Patent number: 7635776
    Abstract: A ligand represented by the formula (1): R1R2N-Q1-X-Q2-NR3R4??(1) wherein R1, R2, R3 and R4 are each the same or different and represent a group represented by the formula (2): wherein Q3 is an optionally substituted alkylene group, an optionally substituted cycloalkylene group, an optionally substituted arylene group, or an optionally substituted divalent heterocyclic group, R5 is an optionally substituted alkyl group, an optionally substituted aryl group or an optionally substituted heterocyclic group and R6 is a substituent which may coordinate or bind to a metal atom, or R5 and R6, taken together, may form a ring, Q1 and Q2 are each the same or different and represent an optionally substituted alkylene group or a single bond, and X is a divalent spacer.
    Type: Grant
    Filed: February 4, 2004
    Date of Patent: December 22, 2009
    Assignee: Takasago International Corporation
    Inventors: Kazushi Mashima, Koji Ohno, Kazuhiko Matsumura
  • Publication number: 20090247397
    Abstract: A manufacture method for a metal-supported catalyst in accordance with an embodiment of the invention includes: binding a compound having a coordinatable functional group onto a catalyst support; impregnating the catalyst support to which the compound having the coordinatable functional group is bound, with a solution that contains a metal complex in which a ligand is coordinated to one catalyst metal atom or a plurality of catalyst metal atoms of the same kind, and substituting at least partially the ligand coordinated in the metal complex with the coordinatable functional group of the compound bound to the metal oxide support; and drying and firing the catalyst support impregnated with the solution.
    Type: Application
    Filed: February 28, 2007
    Publication date: October 1, 2009
    Inventors: Kazushi Mashima, Masato Ohashi, Akihiro Yagyu, Hirohito Hirata
  • Publication number: 20090198070
    Abstract: The invention relates to a method for producing an azoline compound represented by the general formula (3): wherein R1 represents an optionally substituted hydrocarbon group, an optionally substituted alkoxy group, an optionally substituted alkoxycarbonyl group, a halogen atom, a substituted amino group, a substituted carbamoyl group or an optionally substituted heterocyclic group; R3, R4, R5 and R6 may be the same or different and each represents a hydrogen atom, an optionally substituted hydrocarbon group, an optionally substituted alkoxy group, an optionally substituted alkoxycarbonyl group, a halogen atom, a substituted amino group, a substituted carbamoyl group or an optionally substituted heterocyclic group; two arbitrary groups selected from R3, R4, R5 and R6 may bond to each other to form a ring; and Z1 represents an oxygen atom, a sulfur atom or a selenium atom; comprising reacting a carboxylic acid or a carboxylic acid derivative represented by the general formula (1): R1CO2R2??(1) wherein
    Type: Application
    Filed: December 4, 2006
    Publication date: August 6, 2009
    Applicants: OSAKA UNIVERSITY, TAKASAGO INTERNATIONAL CORPORATION
    Inventors: Kazushi Mashima, Takashi Ohshima, Takanori Iwasaki, Hironori Maeda, Kenya Ishida
  • Publication number: 20090036696
    Abstract: The present invention has as its object to provide an iridium complex represented by the general formula: [(l r H L1 L2)2(?-X1)(?-X2)(?-X3)]X4??(1) (wherein L1 and L2 may be the same or different and each represent a monodendate neutral ligand, or each cooperate with the other to form a bidendate neutral ligand; X1, X2 and X3 may be the same or different, and each represent a halogen atom; and X4 is a counter-anion). Also, the present invention provides a novel catalyst which can achieve excellent performance as a catalyst for asymmetric synthesis, especially asymmetric hydrogenation, in terms of chemical selectivity, enantioselectivity and catalytic activity, and the like.
    Type: Application
    Filed: August 27, 2004
    Publication date: February 5, 2009
    Inventors: Kazushi Mashima, Tsuneaki Yamagata
  • Publication number: 20080233410
    Abstract: The present invention provides a transition metal complex compound of a specific structure having a metal carbene bond, a production process for the same and an organic EL device in which an organic thin film layer comprising a single layer or plural layers having at least a luminescent layer is interposed between an anode and a cathode, wherein at least one layer in the above organic thin film layers contains the transition metal complex compound having a metal carbene bond described above. Provided are a novel transition metal complex compound having a metal carbene bond which has an electroluminescent characteristic and which can provide an organic electroluminescent device having a high luminous efficiency and a production process for a transition metal complex compound.
    Type: Application
    Filed: September 7, 2006
    Publication date: September 25, 2008
    Applicants: Idemitsu Kosan Co., Ltd., Osaka University
    Inventors: Kazushi Mashima, Masami Watanabe