Patents by Inventor Zbigniew S. Zelawski, deceased

Zbigniew S. Zelawski, deceased 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).

  • Chemical synthesis of flavipucine
    Patent number: 4094878
    Abstract: A method for the total chemical synthesis of flavipucine employs the condensation of 4-hydroxy-6-methyl-2-pyridone with isobutylglyoxal in alkali alkoxide. The resulting alkali salt is acylated in both the 1' and 4 positions. Treatment of the 1',4-diacyloxy derivative with excess alkaline peroxide yields flavipucine.
    Type: Grant
    Filed: May 19, 1977
    Date of Patent: June 13, 1978
    Assignee: Merck & Co., Inc.
    Inventors: Norman L. Wendler, Narindar N. Girotra, Zbigniew S. Zelawski, deceased