1,1'-Biphenyl, 4'-(bromomethyl)-2-nitro- → 5-n-Butyl-2,4-dihydro-4-[(2'-nitrobiphenyl-4-yl)methyl]-2-[2-(trifluoromethyl)phenyl]-3H-1,2,4-triazol-3-one

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By the procedure of Example 13, Step A, 5-n-butyl-2,4-dihydro-2-[2-(trifluoromethyl)phenyl]-3H-1,2,4-triazol-3-one (from Example 16, Step A) was alkylated with (2'-nitrobiphenyl-4-yl)methyl bromide (from Step B). Flash chromatography of the crude product on silica gel (gradient elution with 0.5-5% MeOH in CH2Cl2) gave a 91% yield of the title compound as a sticky foam; satisfactory purity by TLC in 98:2 CH2Cl2 --MeOH; mass spectrum (FAB) m/e 497 (M+1)+.

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