Patents by Inventor Masafumi HIROTSU

Masafumi HIROTSU 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).

  • Methods for producing fluorine-containing hydroxyaldehyde, fluorine-containing propanediol, and fluorine-containing alcohol monomer
    Patent number: 9604891
    Abstract: As shown by the following reaction formula, disclosed is a fluorine-containing hydroxyaldehyde production method, including the step of obtaining a fluorine-containing hydroxyaldehyde represented by the general formula (1) by reacting a fluorine-containing ketone represented by the general formula (4) and an aldehyde represented by the general formula (5) in the presence of an organic base selected from a heterocyclic compound which contains a nitrogen atom in its ring or a tertiary amine. By this production method, it is possible to obtain the fluorine-containing hydroxyaldehyde in a high yield. Furthermore, it is possible to easily obtain in high yields a fluorine-containing propanediol, which is a derivative of this fluorine-containing hydroxyaldehyde, and a fluorine-containing alcohol monomer by using the same.
    Type: Grant
    Filed: March 17, 2015
    Date of Patent: March 28, 2017
    Assignee: Central Glass Company, Limited
    Inventors: Hitoshi Oomuro, Ryo Nadano, Masafumi Hirotsu
  • Methods for Producing Fluorine-Containing Hydroxyaldehyde, Fluorine-Containing Propanediol, and Fluorine-Containing Alcohol Monomer
    Publication number: 20150361026
    Abstract: As shown by the following reaction formula, disclosed is a fluorine-containing hydroxyaldehyde production method, including the step of obtaining a fluorine-containing hydroxyaldehyde represented by the general formula (1) by reacting a fluorine-containing ketone represented by the general formula (4) and an aldehyde represented by the general formula (5) in the presence of an organic base selected from a heterocyclic compound which contains a nitrogen atom in its ring or a tertiary amine. By this production method, it is possible to obtain the fluorine-containing hydroxyaldehyde in a high yield. Furthermore, it is possible to easily obtain in high yields a fluorine-containing propanediol, which is a derivative of this fluorine-containing hydroxyaldehyde, and a fluorine-containing alcohol monomer by using the same.
    Type: Application
    Filed: March 17, 2015
    Publication date: December 17, 2015
    Inventors: Hitoshi OOMURO, Ryo NADANO, Masafumi HIROTSU