Patents by Inventor Yasushi Nii

Yasushi Nii 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 producing optically active 2-phenoxypropionic acid
    Patent number: 4803301
    Abstract: There is provided a process for producing an optically active 2-phenoxypropionic acid, which comprises allowing an optically active lactic ester represented by the following formula (I) to react with a phenol represented by the following formula (II) in the copresence of a reagent A and a reagent B defined below to form an optically active 2-phenoxypropionic ester represented by the following formula (III), and liberating an optically active 2-phenoxypropionic acid represented by the following formula (IV) from the optically active 2-phenoxypropionic ester: ##STR1## wherein R.sup.1 represents a group to form a monovalent ester, which can be eliminated from the compound (III) under weakly basic to acidic conditions and R.sup.
    Type: Grant
    Filed: April 13, 1988
    Date of Patent: February 7, 1989
    Assignee: Kirin Beer Kabushiki Kaisha
    Inventors: Masayuki Sakakibara, Yasushi Nii