Patents by Inventor Wei-Oin Wan

Wei-Oin Wan 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 optically active nucleosides from chiral cyclobutanones
    Patent number: 5580973
    Abstract: A process is disclosed for the preparation of optically active purine nucleosides, particularly nucleosides of formulae 1 and 2, nucleoside analogs and optically active intermediates of formula 3 which may be used in the preparation of nucleosides of the formula 4 as well as a purine nucleosides and nucleoside analogs. ##STR1## The process is directed to the preparation of such compounds, including novel such compounds in their respective .alpha.- and .beta.-anomeric forms, and the enantiomeric forms of these compounds. These compounds show various levels of anti-viral and/or anti-cancer activity.
    Type: Grant
    Filed: January 7, 1994
    Date of Patent: December 3, 1996
    Inventors: Edward Lee-Ruff, Ji-Long Jiang, Wei-Oin Wan