Sulfuric Acid → 7-Hydroxy-4-phenylcoumarin

Participants

Reaction Steps

Concentrated H2SO4 (65 ml) was added to a mixture of resorcinol (26.7 g, 242.4 mmol) and ethyl benzoylacetate (51.26 g, 266.7 mmol) at 0° C. The resulting suspension was stirred for 24 h at room temperature. Water (2 L) was added and the mixture was stirred for 1 h. The solid was filtered, washed with water (2 L) and dried to give 55.78 g of the titled compound.

Provenance & Evidence