Synthesis of Novel Phosphoric Esters of Flavone and Isoflavone by Atherton–Todd Reaction

Abstract 7‐hydroxyflavone, chrysin, 4′‐chloro‐7‐hydroxyisoflavone and 4′‐fluo‐7‐hydroxy‐isoflavone were phosphoylated by the Atheron–Todd reaction. The expected phosphates are obtained in good yields.