Patents by Inventor Susumu Arashida

Susumu Arashida 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 2-(substituted aryl) propionaldehyde
    Patent number: 4670607
    Abstract: A 2-(substituted aryl)propionaldehyde of the formula, ##STR1## (wherein Ar denotes ##STR2## is produced in high yield by reacting a methyl (substituted aryl) ketone of the formula ##STR3## with phenyldimethylsulfonium methylsulfate of the formula, ##STR4## in the presence of alkali metal hydroxide to obtain a reaction mixture containing 2-(substituted aryl)1,2-epoxypropane of the formula, ##STR5## and thioanisole, and subjecting the reaction mixture to contact with anhydrous MgCl.sub.2. The propionaldehyde compound is also produced in high yield by contacting the epoxypropane compound with anhydrous MgCl.sub.2 in the presence of a soft nucleophile such as a sulfide, a thiol and a phosphine.
    Type: Grant
    Filed: May 16, 1986
    Date of Patent: June 2, 1987
    Assignee: Hamari Chemicals, Ltd.
    Inventors: Sadayuki Maeda, Yasutaka Shinoo, Shinji Takenaka, Susumu Arashida, Iwao Shimizu