title: Facile synthesis, fluorescence, and photochromism of novel helical pyrones and chromenes.
abstract: [reaction: see text] Aryl coumaryl ethylenes undergo oxidative photocyclization readily to yield helical pyrone-annulated condensed aromatics. The pyrones are conveniently converted to the corresponding photochromic diphenylpyrans/chromenes. Both pyrones and chromenes exhibit helicity-dependent fluorescence efficiency and persistence, respectively.
authors.affiliation: Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India. moorthy@iitk.ac.in
authors.forename: Jarugu Narasimha
authors.initials: JN
authors.lastname: Moorthy
authors.forename: Parthasarathy
authors.initials: P
authors.lastname: Venkatakrishnan
authors.forename: Sanchita
authors.initials: S
authors.lastname: Sengupta
authors.forename: Mahiuddin
authors.initials: M
authors.lastname: Baidya
mesh_terms: D001578:Benzopyrans / Q000138:chemical synthesis*; D005453:Fluorescence; D015394:Molecular Structure; D010777:Photochemistry; D011753:Pyrones / Q000138:chemical synthesis*
chemical_list: D001578:Benzopyrans; D011753:Pyrones