Heterocyclic synthesis with β-ketosulfoxides IV. Synthesis of 3-substituted chromones

A novel synthesis of 3-(hydroxymethyl)chromones from o-hydroxy-ω-(methylsulfinyl)acetophenones has been developed. These have been utilized in the synthesis of 3-formyl, 3-cyano, 3-carboxy, 3-carboxamido, 3-chloromethyl, 3-aminomethyl and 3-methoxymethylchromones.