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À propos de : Synthesis of Pyrrolo- and Pyrido[1,2-a]xanthene [1,9-de]azepines: A Study of the Azepine Ring Construction        

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  • Synthesis of Pyrrolo- and Pyrido[1,2-a]xanthene [1,9-de]azepines: A Study of the Azepine Ring Construction
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  • Pentacyclic pyrrolo- and pyrido[1,2-a]xanthene[1,9-de]azepines were synthesized in various oxidationstates by assembling the azepine ring following two strategies: 7-endo-trig cyclization of the aryl radicalderived from a γ-methylene lactam and cyclodehydration of aldehydes. Other strategies examined (Heckreaction and intramolecular acylation) did not afford azepines, but six-membered nitrogenated rings.
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