Condensation of 2-(bromomethyl)-N-methyl-3-nitrobenzamide (I) with 4-(4-fluorobenzyl)piperidine (II) affords the piperidinylmethyl benzamide (III). The nitro group of (III) is then reduced by catalytic hydrogenation over Pd/C to provide aniline (IV). Subsequent coupling of aniline (IV) with 3-acetylphenyl isocyanate (V) leads to the target N,N'-diaryl urea.