Potassium Carbonate → 2-(2,4-Dichloro-6-methylphenoxy)-7-(1-ethylpropyl)-1-methyl-4-(trifluoromethyl)-1H-benzimidazole

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Reaction Conditions

Reaction Steps

A mixture of 2-chloro-7-(1-ethylpropyl)-1-methyl-4-(trifluoromethyl)-1H-benzimidazole (304 mg, 1.00 mmol), 4,6-dichloro-o-cresol (531 mg, 3.00 mmol), potassium carbonate (553 mg, 4.0 mmol) and N,N-dimethylformamide (5 ml) was heated at 110° C. for 48 h. Aqueous saturated sodium bicarbonate was added to the residue and extracted with ethyl acetate. The extracts were washed with water, dried over magnesium sulfate and concentrated in vacuo. The residue was purified by column chromatography on silica gel with a 10% ethyl acetate/n-hexane and recrystallization from diisopropylether/n-hexane to give 290 mg (0.65 mmol, 65%) of the title compound as a white powder.

Provenance & Evidence