Synthesis of Pentacyclic 13-Azadibenzo[a,de]anthracenes via Anionic Cascade Ring Closure
摘要:
Bromine-lithium exchange using tert-butyllithium at -78 degreesC 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.
Synthesis of Pentacyclic 13-Azadibenzo[a,de]anthracenes via Anionic Cascade Ring Closure
摘要:
Bromine-lithium exchange using tert-butyllithium at -78 degreesC 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.
Synthesis of Pentacyclic 13-Azadibenzo[<i>a</i>,<i>d</i><i>e</i>]anthracenes via Anionic Cascade Ring Closure
作者:Jesper L. Kristensen、Per Vedsø、Mikael Begtrup
DOI:10.1021/jo0300340
日期:2003.5.1
Bromine-lithium exchange using tert-butyllithium at -78 degreesC 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.