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).
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Publication number: 20240217986Abstract: It is an object to provide a high-yield production method of a hydroxythienoimidazole derivative, a vinyl sulfide derivative, an n-butylidene sulfide derivative, and a thienoimidazole derivative substituted with a straight-chain saturated hydrocarbon, and, in order to achieve the object, a production method according to one embodiment includes a step of mixing a thiolactone derivative represented by formula (I) with a Grignard reagent represented by formula (1) or (2) in the presence of a copper salt to obtain a hydroxythienoimidazole derivative represented by formula (II) or (IV).Type: ApplicationFiled: June 10, 2022Publication date: July 4, 2024Applicant: TOKUYAMA CORPORATIONInventors: Masahiko SEKI, Kazushi MASHIMA, Hayato TSURUGI, Daiki KATO
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Publication number: 20240025873Abstract: 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: ApplicationFiled: October 1, 2021Publication date: January 25, 2024Applicants: TOKUYAMA CORPORATION, OSAKA UNIVERSITYInventors: Masahiko SEKI, Kazushi MASHIMA, Hayato TSURUGI, Daiki KATO, Tomoya MURASE, Jalindar Bhausaheb TALODE
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Patent number: 11377415Abstract: 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: GrantFiled: February 28, 2019Date of Patent: July 5, 2022Assignees: TAKASAGO INTERNATIONAL CORPORATION, OSAKA UNIVERSITYInventors: Kazushi Mashima, Haruki Nagae, Takahiro Hirai, Daiki Kato, Shusei Soma, Shinya Akebi, Shoko Akiyama, Kazuhiko Matsumura, Yoshimasa Matsushima
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Publication number: 20200399200Abstract: 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: ApplicationFiled: February 28, 2019Publication date: December 24, 2020Applicants: TAKASAGO INTERNATIONAL CORPORATION, OSAKA UNIVERSITYInventors: Kazushi MASHIMA, Haruki NAGAE, Takahiro HIRAI, Daiki KATO, Shusei SOMA, Shinya AKEBI, Shoko AKIYAMA, Kazuhiko MATSUMURA, Yoshimasa MATSUSHIMA
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Publication number: 20170348681Abstract: 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: ApplicationFiled: December 15, 2015Publication date: December 7, 2017Inventors: Christophe Coperet, Victor Mougel, Kazushi Mashima, Hayato Tsurugi, Haruki Nagae
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Patent number: 9012649Abstract: 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: GrantFiled: January 30, 2014Date of Patent: April 21, 2015Assignee: Takasago International CorporationInventors: Kazushi Mashima, Yusuke Kita, Takuto Nagano, Atsuhiro Iimuro, Kenta Yamaji, Shoji Hida, Kiyoto Hori, Hideki Nara
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Publication number: 20140213792Abstract: 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: ApplicationFiled: January 30, 2014Publication date: July 31, 2014Applicant: TAKASAGO INTERNATIONAL CORPORATIONInventors: Kazushi MASHIMA, Yusuke KITA, Takuto NAGANO, Atsuhiro IIMURO, Kenta YAMAJI, Shoji HIDA, Kiyoto HORI, Hideki NARA
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Patent number: 8431709Abstract: 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: GrantFiled: October 10, 2008Date of Patent: April 30, 2013Assignee: Takasago International CorporationInventors: Kazushi Mashima, Takashi Ohshima, Takanori Iwasaki, Noboru Sayo
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Patent number: 7977271Abstract: 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: GrantFiled: February 28, 2007Date of Patent: July 12, 2011Assignee: Toyota Jidosha Kabushiki KaishaInventors: Kazushi Mashima, Masato Ohashi, Akihiro Yagyu, Hirohito Hirata
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Publication number: 20110098479Abstract: 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 RType: ApplicationFiled: December 29, 2010Publication date: April 28, 2011Inventors: KAZUSHI MASHIMA, Takashi Ohshima, Takanori Iwasaki, Hironori Maeda, Kenya Ishida
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Patent number: 7888513Abstract: 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 R1Type: GrantFiled: December 4, 2006Date of Patent: February 15, 2011Assignee: Takasago International CorporationInventors: Kazushi Mashima, Takashi Ohshima, Takanori Iwasaki, Hironori Maeda, Kenya Ishida
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Publication number: 20110021345Abstract: 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: ApplicationFiled: September 9, 2010Publication date: January 27, 2011Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kazushi MASHIMA, Masato OHASHI, Akihiro YAGYU, Hirohito HIRATA
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Publication number: 20100249422Abstract: 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: ApplicationFiled: October 10, 2008Publication date: September 30, 2010Applicant: Takasago International CorporationInventors: Kazushi Mashima, Takashi Ohshima, Takanori Iwasaki, Noboru Sayo
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Publication number: 20100155650Abstract: 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: ApplicationFiled: June 7, 2007Publication date: June 24, 2010Inventors: Kazushi Mashima, Masato Ohashi, Akihiro Yagyu, Hirohito Hirata
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Publication number: 20100152029Abstract: 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: ApplicationFiled: February 28, 2007Publication date: June 17, 2010Inventors: Kazushi Mashima, Masato Ohashi, Akihiro Yagyu, Hirohito Hirata
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Patent number: 7642357Abstract: 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: GrantFiled: August 27, 2004Date of Patent: January 5, 2010Assignee: Takasago International CorporationInventors: Kazushi Mashima, Tsuneaki Yamagata
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Patent number: 7635776Abstract: 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: GrantFiled: February 4, 2004Date of Patent: December 22, 2009Assignee: Takasago International CorporationInventors: Kazushi Mashima, Koji Ohno, Kazuhiko Matsumura
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Publication number: 20090247397Abstract: 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: ApplicationFiled: February 28, 2007Publication date: October 1, 2009Inventors: Kazushi Mashima, Masato Ohashi, Akihiro Yagyu, Hirohito Hirata
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Publication number: 20090198070Abstract: 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) whereinType: ApplicationFiled: December 4, 2006Publication date: August 6, 2009Applicants: OSAKA UNIVERSITY, TAKASAGO INTERNATIONAL CORPORATIONInventors: Kazushi Mashima, Takashi Ohshima, Takanori Iwasaki, Hironori Maeda, Kenya Ishida
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Publication number: 20090036696Abstract: 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: ApplicationFiled: August 27, 2004Publication date: February 5, 2009Inventors: Kazushi Mashima, Tsuneaki Yamagata