Nitric Acid → HCID 67355479, compound

Participants

Reaction Conditions

Reaction Steps

Ethyl 2-(4-chlorophenyl)-5-isopropoxybenzofuran-3-carboxylate 4 (30 g, 0.084 mol) was dissolved in chloroform (75 mL) and the resulting solution was cooled in an ice bath. Nitric acid (55 mL) was also dissolved in chloroform (75 mL) and cooled in an ice bath. The acid solution was added dropwise to the solution of ethyl 2-(4-chlorophenyl)-5-isopropoxybenzofuran-3-carboxylate over 1 hour, and the reaction mixture was then stirred at 0° C. for 1.5 hrs. The reaction mixture was then diluted with water (60 mL) and the layers were separated. The organic layer was dried with anhydrous sodium sulfate, filtered, and concentrated under reduced pressure to give a brown oil which was purified by column chromatography (5/1 PE/EA) to afford ethyl 2-(4-chlorophenyl)-5-isopropoxy-6-nitrobenzofuran-3-carboxylate as a brown solid (11 g, 32%).

Provenance & Evidence