Synthesis of pentacyclic 13-azadibenzo[a,de]anthracenes via anionic cascade ring closure

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Jesper Langgaard Kristensen, P. Vedsø, M. Begtrup

Bromine-lithium exchange using tert-butyllithium at -78 °C initiates a cascade process whereby either xanthone derivatives or pentacyclic 13-azadibenzo[a,de]anthracenes are produced in high yields. The reaction proceeds via a sequential intramolecular trapping of organolithium intermediates.
Original languageEnglish
JournalJournal of Organic Chemistry
Volume68
Issue number10
Pages (from-to)4091-4092
Number of pages2
ISSN0022-3263
Publication statusPublished - 16 May 2003

ID: 45437494