Hydrogen Peroxide → 4-Bromo-2-(p-chlorophenyl)-1-(ethoxymethyl)-5-(trifluoromethyl)pyrrole-3-carboxamide

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A mixture of 4-bromo-2-(p-chlorophenyl)-1-(ethoxymethyl)-5-(trifluoromethyl)pyrrole-3-carbonitrile (4.07 g, 10 mmol), sodium hydroxide (0.8 g, 20 mmol) and 30 wt/wt % hydrogen peroxide solution (7.2 mL, 70 mmol) in methanol is stirred at room temperature for 7 hours, treated with sodium hydroxide solution (0.8 g NaOH in 5 mL of H2O) and 30 wt/wt % hydrogen peroxide solution (7 mL), stirred at room temperature overnight, heated at 40° C. for 8 hours and diluted with water. The aqueous mixture is filtered and the filter cake is washed with water and heptane and dried to give the title product as a white solid (3.7 g) which is identified by 1H and 13C NMR spectral analyses.

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