N‐Heterocyclic Carbene Catalyzed Intramolecular Hydroacylation of Activated Alkynes: Synthesis of Chromones

Abstract

Abstract An organocatalytic intramolecular Stetter‐type hydroacylation reaction between an aldehyde and an activated alkyne has been developed. This study induces salicylaldehyde‐derived alkyne derivatives to assemble into a series of chromone derivatives using a catalytic amount of thiazolium‐based carbene catalyst.