Patents Represented by Attorney Donald J. Johnson

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  • Aromatic coupling process
    Patent number: 4538006
    Abstract: 4-(2,4-Dinitrophenyl)phenols are prepared by reacting a 1,3-dinitrobenzene having a replaceable hydrogen in the 4-position with a phenol having a replaceable hydrogen in the 4-position in an inert solvent and in the presence of a strong base. The 1,3-dinitrobenzene and phenol may be substituted or unsubstituted, and preferred phenols include phenol and 2,6-dialkylphenols.
    Type: Grant
    Filed: May 4, 1984
    Date of Patent: August 27, 1985
    Assignee: Ethyl Corporation
    Inventor: G. Patrick Stahly