Reacción #54974

Ecuación de reacción

resorcinol

ethyl acetylacetate

ethanol

→

4-methyl-7-hydroxy-coumarin

Rendimiento 77.0%

Disolventes

sulphuric acid

Condiciones de reacción

Procedimiento

0.1 mole resorcinol and 0.1 mole ethyl acetylacetate in solution in 100 ml concentrated sulphuric acid are maintained at 5° C. for 3 hours. After recyrstallisation of the solid formed from ethanol, there are obtained 12.5 grams 4-methyl-7-hydroxy-coumarin, melting at 185° C.

Fuente