Visible-light-induced cascade chromone cyclization/chalcogenation to access 3-chalcogenyl-chromones using elemental sulfur/selenium

Abstract

A mild and efficient visible-light-induced cascade undergoing a chromone cyclization/chalcogenation at room temperature has been developed. This three-component reaction employs user-friendly elemental S₈ and Se as the chalcogenide source, providing an attractive route for the convenient synthesis of 3-chalcogenyl-chromones with a wide substrate scope and good functional group tolerance.