title: Iron-catalyzed synthesis of functionalized 2H-chromenes via intramolecular alkyne-carbonyl metathesis.
abstract: An iron-catalyzed intramolecular alkyne-aldehyde metathesis strategy of the alkynyl ether of salicylaldehyde derivatives has been developed which works under mild reaction conditions to produce the functionalized 2H-chromene derivatives. This protocol is compatible toward a wide range of functional groups, such as methoxy, fluoro, chloro, bromo, and phenyl groups. This method provides an atom-economical and environmentally friendly approach for the synthesis of a series of substituted 2H-chromenes.
authors.affiliation: Department of Chemistry, Jadavpur University, Kolkata 700032, West Bengal, India.
authors.forename: Krishnendu
authors.initials: K
authors.lastname: Bera
authors.forename: Soumen
authors.initials: S
authors.lastname: Sarkar
authors.forename: Srijit
authors.initials: S
authors.lastname: Biswas
authors.forename: Sukhendu
authors.initials: S
authors.lastname: Maiti
authors.forename: Umasish
authors.initials: U
authors.lastname: Jana
mesh_terms: D000447:Aldehydes / Q000737:chemistry*; D000480:Alkynes / Q000737:chemistry*; D001578:Benzopyrans / Q000138:chemical synthesis* / Q000737:chemistry*; D002384:Catalysis; D055772:Green Chemistry Technology / Q000379:methods*; D007501:Iron / Q000737:chemistry*
chemical_list: D000447:Aldehydes; D000480:Alkynes; D001578:Benzopyrans; D007501:Iron