Hydrochloric Acid → HCID 21549029, compound

Participants

Reaction Steps

The solid acid product of step (a) (5.0g) was suspended in dry ethanol and the mixture saturated with hydrogen chloride, following which dissolution of the solid occurred. The solution was refluxed for 1 hour and evaporated to dryness. The solid obtained was dissolved in ethyl acetate, washed with sodium hydrogen carbonate solution and water, dried over magnesium sulphate, filtered and evaporated to leave a pink solid. The solid was recrystallised from aqueous ethanol to give 3.5g of ethyl 4-(7-hydroxy-4-oxo-8-propyl-4H-1-benzopyran-2-yl)benzoate, melting point 225°-6°.

Provenance & Evidence