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Photooxygenation of α,α′-dimethylstilbenes sensitised by photochromic compounds

✍ Scribed by Christiane Salemi-Delvaux; Barbara Luccioni-Houzé; Gilles Baillet; Gérard Giusti; Robert Guglielmetti


Book ID
103410595
Publisher
Elsevier Science
Year
1996
Tongue
French
Weight
196 KB
Volume
37
Category
Article
ISSN
0040-4039

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Heating the title compounds 1 at reflux in acetic anhydride yields quinoxalines 3 and 4 via a presumed aryliminoiminyl radical 5, resulting from homolytic cleavage of the N O bond in the intermediate ester 2. The observed regioselectivity of the reaction is also rationalized by implicating such a ra