Imidazole → HCID 70637823, compound

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Reaction Steps

5.5 g. of 4-hydroxy-3-nitrobenzaldehyde is reacted with 6.7 g. of 2,4-dichlorobenzyl chloride analogously to Chem. Abstr. 71 (1969) 30232, thus obtaining 5.2 g. of 4-(2,4-dichlorobenzyloxy)-3-nitrobenzaldehyde, m.p. 172°-174°. Of this product, 0.9 g. is dissolved in methanol/dioxane and reduced with 500 mg. of sodium borohydride, yielding 580 mg. of 4-(2,4-dichlorobenzyloxy)-3-nitrobenzyl alcohol, m.p. 126°-127°. 450 mg. of this product is heated with 5 ml. of thionyl chloride for 5 minutes to 100°. After the residual thionyl chloride has been removed under vacuum, the remainder is vacuum-filtered with ethanol, thus producing 400 mg. of (4-chloromethyl-2-nitrophenyl)-(2,4-dichlorobenzyl)-ether, m.p. 147°-149°. 300 mg. of this ether is added to a solution of 68 mg. of imidazole in 3 ml. of dimethylformamide, which was agitated with the addition of 30 mg. of sodium hydride suspension (80%) for 1 hour at room temperature, and the mixture is stirred for another hour at room temperature. Then, the mixture is combined with 1N sulfuric acid and the thus-precipitated product is vacuum-filtered, dissolved in methanol/chloroform, and extracted with 1N sodium hydroxide solution. The chloroform phase is washed with water, dried, and evaporated. Recrystallization from cyclohexane/benzene yields 260 mg. of [4-(4-(1-imidazolylmethyl)-2-nitrophenyl]-(2,4-dichlorobenzyl)-ether, m.p. 120°-124°.

Provenance & Evidence