Patents by Inventor Takahiro Asada

Takahiro Asada 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).

  • Method for producing jasmonate derivatives and intermediates thereof
    Patent number: 6500990
    Abstract: A process for efficiently producing a 2-alkyl-2-cyclopentenone comprising reacting an amine and a hydrogen halide, which are present in a ratio ranging from 1.1:1 to 5:1, with a 2-alkylidene cyclopentanone to carry out an isomerization reaction. A process for producing a jasmonate derivative comprising reacting a 2-alkyl-2-cyclopentenone with a malonic acid diester.
    Type: Grant
    Filed: March 13, 2001
    Date of Patent: December 31, 2002
    Assignee: Kao Corporation
    Inventors: Takahiro Asada, Yoshiharu Ataka, Junji Koshino
  • Method for producing jasmonate derivatives and intermediates thereof
    Publication number: 20010049455
    Abstract: The present invention provides a method for efficiently producing a 2-alkyl-2-cyclopentenone as well as a method for producing a jasmonate derivative by using the same. That is, in the present invention, the compound (2) is obtained by reacting an amine and a hydrogen halide with the compound (1) at a specific ratio to carry out isomerization reaction or by reacting a catalyst comprising an amine and a hydrogen halide with the compound (3) to carry out dehydration-isomerization reaction.
    Type: Application
    Filed: March 13, 2001
    Publication date: December 6, 2001
    Applicant: Kao Corporation
    Inventors: Takahiro Asada, Yoshiharu Ataka, Junji Koshino
  • Tricyclocarboxylate, method for preparing the same and perfume comprising the same
    Patent number: 5811610
    Abstract: A tricyclo?5.2.1.0.sup.2,6 !deca-8-ene-2-carboxylate; a method preparing the same; a method for preparing the tricyclo?5.2.1.0.sup.2,6 !decane-2-carboxylate by reducing a double bond of the tricyclo?5.2.1.0.sup.2,6 !deca-8-ene-2-carboxylate; and a perfume comprising the tricyclo?5.2.1.0.sup.2,6 !decane-2-carboxylate.
    Type: Grant
    Filed: July 30, 1997
    Date of Patent: September 22, 1998
    Assignee: Kao Corporation
    Inventors: Takahiro Asada, Yoshiharu Ataka, Junji Koshino, Hideto Takase