Patents by Inventor Hidekuni Gotoh

Hidekuni Gotoh 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 2,2-dimethoxy-2-phenylacetophenone
    Patent number: 5081307
    Abstract: 2,2-Dimethoxy-2-phenylacetophenone is prepared by reacting benzil with dimethyl sulfate and alkali metal methylate in a nonpolar organic solvent (e.g. xylene, cyclohexane) in the presence of one or more of catalysts selected from the group consisting of polyethylene glycol, a polyethylene glycol dialkyl ether and a crown ether. The reaction can be carried out more preferably in the presence of diglyme or triglyme or a mixture of diglyme or triglyme and polyethylene glycol.
    Type: Grant
    Filed: July 5, 1990
    Date of Patent: January 14, 1992
    Assignee: Kawaguchi Chemical Co., Ltd.
    Inventors: Soichi Kitamura, Masaru Tomioka, Hidekuni Gotoh