Hydrochloric Acid → HCID 22267274, compound

Participants

Reaction Steps

Ethyl(2,8-dioxo-4-phenyl-2,6,7,8-tetrahydrocyclopenta[g]chromen-3-yl)acetate (1.2 g) was dissolved in acetic acid (20 ml) and concentrated hydrochloric acid (10 ml), and heated under reflux for 30 minutes. The reaction solution was concentrated under reduced pressure, and the resultant residue was dissolved in a solvent mixture of THF (10 ml) and ethyl acetate (50 ml), and then washed with water followed by a saturated aqueous solution of sodium hydrogen carbonate and a saturated aqueous solution of sodium chloride. After drying over magnesium sulfate, the solvent was distilled off under reduced pressure, and the residue was purified by recrystallization from ethyl acetate to obtain the title compound (0.87 g, yield: 79%).

Provenance & Evidence