537036-83-2Relevant articles and documents
Synthesis of pentacyclic 13-azadibenzo[a,de]anthracenes via anionic cascade ring closure
Kristensen, Jesper L.,Veds?, Per,Begtrup, Mikael
, p. 4091 - 4092 (2003)
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.