The compound was prepared by condensation of acetophenone (I) with 3-flourobenzaldehyde (II) in refluxing ethanolic NaOH, followed by cyclization of the intermediate chalcone in diphenyl ether at 180 C.
The desired 2'-amino chalcone is synthesized by a base-catalyzed condensation of 2-amino acetophenone (I) and benzaldehyde (II) by means of aqueous NaOH in EtOH.