Acetic Anhydride → HCID 21192579, compound

Participants

Reaction Steps

To a flask containing 2-(ethyl-4-nitroanilino)-1-ethanol (4.2 g) and 4-dimethylaminopyridine (0.12 g) in pyridine (20 mL) at 0° C. under a drying tube is added acetic anhydride (5.0 mL) dropwise. The reaction mixture is allowed to warm to room temperature overnight. The reaction mixture is diluted with ethyl acetate and partioned against saturated aqueous sodium carbonate. The layers are separated and the aqueous phase extracted with two additional portions of ethyl acetate. The combined organic phases are washed with brine, dried over sodium sulfate and concentrated under reduced pressure. The residue is azeotroped three times with toluene to remove residual pyridine. The residue is adsorbed onto silica and chromatographed on silica eluting with 50% ethyl acetate in heptane. The product-containing fractions are evaporated to give 4.9 g of 2-(ethyl-4-nitroanilino)ethyl acetate as a yellow oil.

Provenance & Evidence