Tetrahydrofuran → 2'-Hydroxy-4'-methoxyacetanilide

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

2-Nitro-5-methoxyphenol (prepared from 3-methoxyphenol, R. J. Maleski, Synthetic Communications, 1993, 23, 343-348) (48.5 g, 0.287 mol) dissolved in THF (1.5 L) was hydrogenated at ambient temperature over night with 10% palladium on carbon (10 g) until 20.3 L of hydrogen was consumed. After filtration and evaporation the residue was suspended in degased water (1.7 L) and acetic anhydride (42.5 mL) was added with stirring. The mixture was heated to 60° C. for 1 h and then cooled to room temperature. The volatiles were removed in vacuo and the solid was washed thoroughly with water and dried in vacuo to give brick-red crystals (41.7 g, 80%).

Herkunft & Nachweise