Patents by Inventor Yasushi Hanzawa

Yasushi Hanzawa 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 the preparation of cis-hexahydroisoindoline derivatives
    Patent number: 5932744
    Abstract: The instant invention provides a process for the industrial preparation of cis-hexahydroisoindoline derivatives in high yields and stereoselective manner. The instant invention relates to a process for the preparation of cis-hexahydroisoindoline derivative of formula II ##STR1## wherein R.sup.2 is hydrogen, alkyl, benzyl, acyl or alkoxycarbonyl, by catalytic reduction of isoindoline derivative of formula I ##STR2## wherein R.sup.1 is hydrogen, alkyl, benzyl, acyl or alkoxycarbonyl, wherein the catalytic reduction is carried out in the presence of a ruthenium, a rhodium or a palladium catalyst.
    Type: Grant
    Filed: August 4, 1998
    Date of Patent: August 3, 1999
    Assignee: Yuki Gosei Kogyo Co., Ltd.
    Inventors: Yasushi Hanzawa, Masahiro Kusano, Hitoshi Koike