Facile Synthesis, Fluorescence, and Photochromism of Novel Helical Pyrones and Chromenes
Organic Letters2006Vol. 8(21), pp. 4891–4894
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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.
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