The condensation between 5-acetamido-2-fluoro-4-nitrobenzotrifluoride (I) and 4-(hydroxymethyl)imidazole (II) in acetonitrile at 120 C in a sealed vessel furnished aryl imidazole (III). Subsequent acetamide hydrolysis in (III) with aqueous HCl provided nitro amine (IV), which was further reduced to phenylenediamine (V) by catalytic hydrogenation over Pd/C. Quinoxaline (VII) was prepared by condensation of phenylenediamine (V) with diethyl oxomalonate (VI) in boiling EtOH. The primary hydroxyl group of (VII) was then condensed with ethyl 4-isocyanatobenzoate (VIII) yielding carbamate (IX). Finally, both ethyl ester groups of (IX) were hydrolyzed by means of KOH to produce the target dicarboxylic acid.