A method for synthesizing a 4-amino substituted quinolinone includes
reacting a substituted or unsubstituted 2-benzimidazolyl-2-acetate with a
substituted or unsubstituted 2-aminobenzonitrile in the presence of a
base or an acid. A 4-amino substituted quinolinone compound is formed by
the reaction, and the 4-amino substituted quinolinone compound comprises
a benzimidazole group.