Patents by Inventor Yorihiko Inoue

Yorihiko Inoue 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 optical active 4-hydroxy-2-cyclopentenone
    Patent number: 5395977
    Abstract: A process for producing optically active 4-hydroxy-2-cyclopentenone [1] which comprises reacting 4-hydroxy-2-cyclopentenone represented by the formula: ##STR1## with an optically active propargyl alcohol derivative represented by the general formula: ##STR2## wherein R and R.sup.1 each independently represent a halogenated phenyl group, an alkylphenyl group, or an alkyl group which may be substituted with one or more halogen atom(s), and * indicates an asymmetric carbon atom, to form an optically active complex [3] consisting essentially of optically active 4-hydroxy-2-cyclopentenone represented by the formula [1] ##STR3## wherein * indicates an asymmetric carbon atom, and the optically active propargyl alcohol derivative [2], and then decomposing the optically active complex [3].
    Type: Grant
    Filed: March 12, 1993
    Date of Patent: March 7, 1995
    Assignee: Sumitomo Chemical Company, Ltd.
    Inventors: Fumio Toda, Yorihiko Inoue, Masayoshi Minai