Patents by Inventor Namito Yoshio

Namito Yoshio 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 preparing trans-.beta.-benzoylacrylic acid ester
    Patent number: 4994600
    Abstract: A process for preparing trans-.beta.-benzoylacrylic acid ester having the general formula (I): ##STR1## wherein R is alkyl group or aralkyl group, which comprises dealcoholizing .beta.-benzoyl-.alpha.-alkoxypropionic acid ester having the general formula (II): ##STR2## wherein R is above, in the presence of an acid catalyst to give trans-.beta.-benzoylacrylic acid ester having the general formula (I).According to the process of the present invention, the by-product (II) produced in the esterification reaction of .beta.-benzoylacrylic acid (III) with the alcohol (V) by the dehydration reaction can be converted into the compound (I) by the dealcoholization reaction in the presence of the acid catalyst and thus trans-.beta.-benzoylacrylic acid ester (I) with a high purity can be produced in an industrially advantageous manner.
    Type: Grant
    Filed: June 2, 1986
    Date of Patent: February 19, 1991
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Satomi Takahashi, Yasuyoshi Ueda, Yoshifumi Yanagida, Namito Yoshio, Takehisa Ohashi, Kiyoshi Watanabe