Hydrochloric Acid → HCID 53693229, compound

Participants

Reaction Steps

A solution of concentrated hydrochloric acid (0.2 ml) in ethanol (20 ml) was added to a stirred refluxing suspension of 2-[2-(4-nitrophenyl)-ethenyl]-6-phenyl-4H-pyran-4-one (8.5 g) and iron powder (4.5 g) in ethanol (80 ml) and water (20 ml). The stirred mixture was heated under reflux for 5 hours, adding further concentrated hydrochloric acid (0.2 ml) after 2 hours. The hot mixture was filtered and the filtrate was evaporated under vacuum. The solid residue was crystallised from chloroform-petroleum ether 60°-80° C. to give 2-[2-(4-aminophenyl)ethenyl]-6-phenyl-4H-pyran-4-one (mp 192°-194° C.).

Provenance & Evidence