title: Reaction of polyhaloalkyl-substituted chromones, pyrones, and furanones with salicylaldehydes as a direct route to fused 2H-chromenes.
abstract: Polyhaloalkyl-substituted chromones, gamma-pyrones, and beta-furanones react with salicylaldehydes in the presence of piperidine to give a wide variety of fused 2H-chromenes in good yields. This novel annulation reaction presumably proceeds by a tandem intermolecular oxa-Michael addition and subsequent intramolecular Mannich condensation.
authors.affiliation: Department of Chemistry, Ural State University, 620083 Ekaterinburg, Russian Federation. vyacheslav.sosnovskikh@usu.ru
authors.forename: Vyacheslav Ya
authors.initials: VY
authors.lastname: Sosnovskikh
authors.forename: Vladislav Yu
authors.initials: VY
authors.lastname: Korotaev
authors.forename: Dmitry L
authors.initials: DL
authors.lastname: Chizhov
authors.forename: Igor B
authors.initials: IB
authors.lastname: Kutyashev
authors.forename: Danil S
authors.initials: DS
authors.lastname: Yachevskii
authors.forename: Olga N
authors.initials: ON
authors.lastname: Kazheva
authors.forename: Oleg A
authors.initials: OA
authors.lastname: Dyachenko
authors.forename: Valery N
authors.initials: VN
authors.lastname: Charushin
mesh_terms: D000447:Aldehydes / Q000737:chemistry; D001578:Benzopyrans / Q000138:chemical synthesis*; D002867:Chromones / Q000737:chemistry; D005663:Furans / Q000737:chemistry; D011753:Pyrones / Q000737:chemistry
chemical_list: D000447:Aldehydes; D001578:Benzopyrans; D002867:Chromones; D005663:Furans; D011753:Pyrones; C013243:salicylaldehyde