Abstract
| - 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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