Journal
ORGANIC LETTERS
Volume 8, Issue 21, Pages 4891-4894Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol0619260
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[GRAPHICS] 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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