Patents by Inventor Connie S. J. Tsai

Connie S. J. Tsai 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).

  • Organometallic reagents and their use in the synthesis of cardenolides and isocardenolides
    Patent number: 4331802
    Abstract: A method for synthesizing a cardenolide or isocardenolide by subjecting an .alpha.,.beta.-unsaturated steroidal 17-ketone to a double bond shift and hydrogenation to produce a (C/D cisoid) ketone which is treated with an organometallic reagent to yield a tertiary alcohol and the acidifying said alcohol to produce said cardenolide or isocardenolide is shown. The invention also relates to organometallic reagents particularly useful in such method.
    Type: Grant
    Filed: October 1, 1980
    Date of Patent: May 25, 1982
    Assignee: Advance Biofactures Corporation
    Inventors: Karel Wiesner, Rinaldo Marini-Bettolo, Connie S. J. Tsai, Thomas Y. R. Tsai