Patents by Inventor Alaa S. Abd-El-Aziz

Alaa S. Abd-El-Aziz 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).

  • Patent number: 6072054
    Abstract: Cyclic aryl ethers, thioethers or amines, and methods for synthesis are disclosed. These cyclic aryl compounds are synthesized by combining a first dinucleophile with a substituted benzene metallized electron-withdrawing complex, having halo or nitro substituen groups, to form a linear bimetallized aryl compound. The linear bimetallized aryl compound is then reacted with a second dinucleophile to form a cyclic bimetallized aryl compound. The metallized electron-withdrawing moieties are then removed from said cyclic bimetallized aryl compound by photolytic demetallation to form a cyclic aryl compound having the formula: ##STR1## wherein: X.sub.1 and X.sub.3 are the same or different and each is a alkyl, heteroalkyl, heterocyclic or aromatic group having up to 6 conjugated rings, optionally substituted;X.sub.2 is benzenen.sub.1 and n.sub.3 are the same or different and each is O, S or N; andn.sub.4 is H or lower alkyl.
    Type: Grant
    Filed: January 20, 1999
    Date of Patent: June 6, 2000
    Assignee: University of Winnipeg
    Inventors: Alaa S. Abd-El-Aziz, Christine R. de Denus, Leslie J. May