Ethanol → Ethyl 3,5-dihydroxynaphthalene-2-carboxylate

Beteiligte Stoffe

Reaktionsschritte

Dihydroxynaphthalene-2-carboxylic acid (25 g) was dissolved in 500 ml ethanol. To this was added 25 ml thionyl chloride. The solution was heated under reflux for 4 hours. Then the solvent was removed under reduced pressure and the resulting solid dissolved in 500 ml ethyl acetate. The organic phase was washed with aqueous potassium carbonate/potassium acetate (1M in each) (3×350 ml). The organic phase was dried over magnesium sulphate then the solvent removed under reduced pressure to yield ethyl 3,5-dihydroxynaphthalene-2-carboxylate as a yellow solid.

Herkunft & Nachweise