p-Fluoronitrobenzene → 2-(4-bromo-benzyl)-1-(4-nitro-phenyl)-4-(2,4-dichloro-phenyl)-1H-imidazole

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Reaction Steps

4-Bromophenylacetic acid (107.5 g, 0.5 mol) was treated according to general procedure A using 2,4-dichlorophenacyl bromide to give 2-(4-bromo-benzyl)-4-(2,4-dichloro-phenyl)-1H-imidazole. 2-(4-Bromo-benzyl)-4-(2,4-dichloro-phenyl)-1H-imidazole (38.2 g, 0.1 mol) was treated as described in general procedure B using 1-fluoro-4-nitrobenzene to give 2-(4-bromo-benzyl)-1-(4-nitro-phenyl)-4-(2,4-dichloro-phenyl)-1H-imidazole.

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