Facile synthesis, fluorescence, and photochromism of novel helical pyrones and chromenes.
[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.
Moorthy
Jarugu Narasimha
JN
Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India. moorthy@iitk.ac.in
Venkatakrishnan
Parthasarathy
P
Sengupta
Sanchita
S
Baidya
Mahiuddin
M
D001578:Benzopyrans / Q000138:chemical synthesis*; D005453:Fluorescence; D015394:Molecular Structure; D010777:Photochemistry; D011753:Pyrones / Q000138:chemical synthesis*
D001578:Benzopyrans; D011753:Pyrones