Patents by Inventor Hisato Kamekawa

Hisato Kamekawa 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).

  • Process for producing nitroguanidine derivatives
    Patent number: 7977496
    Abstract: Disclosed is an improved process for producing nitroguanidine derivatives represented by the formula (3), which has an insecticidal activity, or a salt thereof, wherein the substituents are defined herein, in which nitroisourea derivatives represented by the following general formula (1) or a salt thereof wherein the substituents are defined herein, and compounds represented by the following general formula (2) or a salt thereof, wherein the substituents are defined herein, are reacted in the presence of a base in an aqueous solution wherein an inorganic salt is dissolved at not less than 50% of its saturated solubility.
    Type: Grant
    Filed: February 7, 2007
    Date of Patent: July 12, 2011
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Hisato Kamekawa, Tomotaka Miyashita, Hiroyuki Katsuta, Toshio Kitashima
  • METHOD FOR PRODUCING 2-ALKYL-3-AMINOTHIOPHENE DERIVATIVE
    Publication number: 20090326247
    Abstract: The present invention provides a method of producing a 2-alkyl-3-aminothiophene derivative represented by formula (2) by reducing at least one of the 2-alkenyl-3-aminothiophene derivatives represented by formulae (1a) to (1d), or a mixture thereof, or a salt thereof, without using a protecting group for an amino group: wherein in formulae (1a) to (1d), R1 to R4 each independently represents a hydrogen atom, an alkyl group of 1 to 12 carbon atoms or the like; and R5 and R6 each independently represents a hydrogen atom, a halogen atom, an alkyl group of 1 to 12 carbon atoms or the like. According to the invention, a 2-alkyl-3-aminothiophene derivative usable as an intermediate of agricultural chemicals can be produced by a cost-efficient industrial process, without the use of a high-cost protective group for an amino group.
    Type: Application
    Filed: October 24, 2007
    Publication date: December 31, 2009
    Applicant: MITSUI CHEMICALS , INC.
    Inventors: Takeshi Kakimoto, Yoji Aoki, Daisuke Ura, Miki Enomoto, Hisato Kamekawa, Toshio Kitashima
  • Process for producing nitroisourea derivatives
    Patent number: 7560593
    Abstract: Disclosed is an improved process for producing nitroisourea derivatives which is necessary for producing nitroguanidine derivatives having an insecticidal activity.
    Type: Grant
    Filed: February 7, 2007
    Date of Patent: July 14, 2009
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Hisato Kamekawa, Toshiyuki Kohno, Hiroyuki Katsuta, Daisuke Ura, Kenichi Satoh
  • PROCESS FOR PRODUCING NITROGUANIDINE DERIVATIVES
    Publication number: 20090176990
    Abstract: Disclosed is an improved process for producing nitroguanidine derivatives represented by the following general formula (3), which has an insecticidal activity, or a salt thereof.
    Type: Application
    Filed: February 7, 2007
    Publication date: July 9, 2009
    Applicant: Mitsui Chemicals, Inc.
    Inventors: Hisato Kamekawa, Tomotaka Miyashita, Hiroyuki Katsuta, Toshio Kitashima
  • PROCESS FOR PRODUCING NITROISOUREA DERIVATIVES
    Publication number: 20090018363
    Abstract: Disclosed is an improved process for producing nitroisourea derivatives which is necessary for producing nitroguanidine derivatives having an insecticidal activity.
    Type: Application
    Filed: February 7, 2007
    Publication date: January 15, 2009
    Applicant: MITSUI CHEMICALS, INC
    Inventors: Hisato Kamekawa, Toshiyuki Kohno, Hiroyuki Katsuta, Daisuke Ura, Kenichi Satoh
  • Diamine Derivative, Process of Preparation Thereof, and Fungicide Comprising Diamine Derivative as an Active Ingredient
    Publication number: 20070244153
    Abstract: It is an object of the invention to provide a novel fungicide which exhibits a wide controlling spectrum against pathogens of various crops, and solves the toleration problem.
    Type: Application
    Filed: July 19, 2005
    Publication date: October 18, 2007
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Takeshi Kakimoto, Hisato Kamekawa, Yutaka Chiba, Toshiyuki Kohno, Yumi Kobayashi, Naofumi Tomura, Natsuko Araki, Masako Yoshida, Yoji Aoki, Shinichi Banba