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0 °C

Hydroquinone (110 g) was dissolved in a solution of sodium hydroxide (80 g) in water (400 ml) and to the resulting solution was added dropwise a solution of acetyl chloride (157 g) in tetrahydrofuran (157 g) with ice-cooling (0° C.). The reaction mixture was allowed to stand overnight at room temperature. The reaction mixture was poured into water (1 liter) and the crystals formed was filered and dissolved in chloroform. The solution was washed with dil. sodium hydroxide solution to remove unreacted hydroquinone. After removal of the solvent, the residue was recrystallized from water/ethanol to give hydroquinone diacetate (175 g). m.p. 121°-122.5° C.

1. customthe crystals formed
2. washThe solution was washed with dil. sodium hydroxide solution
3. customto remove unreacted hydroquinone
4. customAfter removal of the solvent
5. customthe residue was recrystallized from water/ethanol