Patents by Inventor Chi-Nung Hsaio

Chi-Nung Hsaio 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 chiral tetracyclic dopaminergic compounds
    Patent number: 5659037
    Abstract: A process for preparing a chiral tetracyclic compound of formula: ##STR1## wherein R is hydrogen or a C.sub.1 -C.sub.6 -alkyl group and Z is oxygen, sulfur or --CH.dbd.CH--, the compounds having uses as dopamine agonists. The process involves reacting a chiral starting material and subsequent chiral intermediates in a series of chirality-preserving synthetic reactions.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: August 19, 1997
    Assignee: Abbott Laboratories
    Inventors: Paul P. Ehrlich, Michael R. Michaelides, Maureen A. McLaughlin, Chi-Nung Hsaio