Abstract
The imidazole substitution of pentafluorobenzenes C 6F 5R: R = CN, NO 2, CO 2C 2H 5, CHO, I, Br, Cl, H) occurred mainly at the para -position to R and corresponding 1-(4′-R-tetrafluorophenyl)imidazoles were obtained in good yields. The reactivity varied markedly with the substituents: nitro- or cyanopentafluorobenzene easily reacted at ambient temperature without any bases; however, methyl- or methoxypentafluorobenzene failed to react even at 100°C in the presence of a strong base.
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