Patents by Inventor Richard Nelson Hurd

Richard Nelson Hurd 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).

  • Conversion of (10'S)-zearalenone to (10'R)-zearalanone
    Patent number: 3997568
    Abstract: (10'R)-Zearalanone is prepared from (10'S)-zearalenone by opening the lactone ring of the zearalenone in an alkaline medium to provide a hydroxy acid, esterifying the hydroxy acid to provide a hydroxy ester, tosylating the hydroxy ester, reacting the tosyl ester with a tetraalkyl ammonium alkyl ester to invert the (S) structure to the (R) structure, and reforming and hydrogenating the lactone to provide (10'R)-zearalanone. (10'R)-Zearalanone, when present in admixture with (10'S)-zearalanone, enhances the uterotropic activity of the latter compound.
    Type: Grant
    Filed: March 18, 1974
    Date of Patent: December 14, 1976
    Assignee: Commercial Solvents Corporation
    Inventors: Charles Allan Peters, Richard Nelson Hurd