Patents by Inventor Akiko Ikumi

Akiko Ikumi 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).

  • Diphenylamine compounds and production method thereof
    Patent number: 9550724
    Abstract: An inexpensive and convenient production method of diphenylamine compounds is provided, that can solve problems in the conventional technology such as decrease in reactivity, restriction of substituents, high temperature, high pressure, by-products or the like. Further, diphenylamine compounds useful as intermediates of medicine and agricultural chemicals are provided. Diphenylamine compounds are produced, represented by general formula (3): which is characterized by reacting aniline compounds represented by general formula (2): under the presence of base and ethers solvent, with 2,6-dichloronitrobenzene compound represented by general formula (1): and a diphenylamine compound represented by general formula (3).
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: January 24, 2017
    Assignees: IHARA CHEMICAL INDUSTRY CO., LTD., KUMIAI CHEMICAL INDUSTRY CO., LTD.
    Inventors: Minoru Ito, Akiko Ikumi
  • Method for producing nitrobenzene compound
    Patent number: 9006477
    Abstract: A method for producing a nitrobenzene compound represented by general formula (2), wherein R1 and R5 are the same or different, and each is a halogen atom or another functional group, and R2, R3, and R4 are the same or different, and each is a hydrogen atom or another functional group, comprises oxidizing an aniline compound represented by general formula (1), wherein R1, R2, R3, R4, and R5 are the same as described above, with hydrogen peroxide in the presence of a tungsten compound under an acidic condition, followed by oxidation with hydrogen peroxide under a neutral to alkaline condition.
    Type: Grant
    Filed: July 4, 2012
    Date of Patent: April 14, 2015
    Assignee: Ihara Chemical Industry Co., Ltd.
    Inventors: Shinki Tani, Nami Yadomatsu, Akiko Ikumi, Yuuki Hirano, Takuya Ido
  • DIPHENYLAMINE COMPOUNDS AND PRODUCTION METHOD THEREOF
    Publication number: 20140336415
    Abstract: An inexpensive and convenient production method of diphenylamine compounds is provided, that can solve problems in the conventional technology such as decrease in reactivity, restriction of substituents, high temperature, high pressure, by-products or the like. Further, diphenylamine compounds useful as intermediates of medicine and agricultural chemicals are provided. Diphenylamine compounds are produced, represented by general formula (3): which is characterized by reacting aniline compounds represented by general formula (2): under the presence of base and ethers solvent, with 2,6-dichloronitrobenzene compound represented by general formula (1): and a diphenylamine compound represented by general formula (3).
    Type: Application
    Filed: December 5, 2012
    Publication date: November 13, 2014
    Inventors: Minoru Ito, Akiko Ikumi
  • METHOD FOR PRODUCING NITROBENZENE COMPOUND
    Publication number: 20140163256
    Abstract: A method for producing a nitrobenzene compound represented by general formula (2), wherein R1 and R5 are the same or different, and each is a halogen atom or another functional group, and R2, R3, and R4 are the same or different, and each is a hydrogen atom or another functional group, comprises oxidizing an aniline compound represented by general formula (1), wherein R1, R2, R3, R4, and R5 are the same as described above, with hydrogen peroxide in the presence of a tungsten compound under an acidic condition, followed by oxidation with hydrogen peroxide under a neutral to alkaline condition.
    Type: Application
    Filed: July 4, 2012
    Publication date: June 12, 2014
    Applicant: IHARA CHEMICAL INDUSTRY CO., LTD.
    Inventors: Shinki Tani, Nami Yadomatsu, Akiko Ikumi, Yuuki Hirano, Takuya Ido