NEW DATA ON THE REACTIVITY OF 2-UNSUBSTITUTED 3-HALOCHROMONES

Abstract

Generalized and systematized information is provided on the chemical properties of 3-halochromones, which can be viewed as geminally activated push-pull haloalkenes. The main focus of this review article is on nucleophilic reactions that can proceed in three different directions with both mono- and bisnucleophiles and can be accompanied by pyrone ring cleavage or preservation. In addition, cycloaddition reactions and metal-catalyzed reactions involving 3-halochromones are described. A total of 56 references are provided.