EXPERIMENTS DIRECTED TOWARDS THE SYNTHESIS OF ANTHRACYCLINONES .18. NOVEL DIOXEPINS FROM THE BORON-TRIFLUORIDE CATALYZED CYCLIZATION OF METHALLYL ANTHRAQUINONE ACETALS
Rc. Cambie et al., EXPERIMENTS DIRECTED TOWARDS THE SYNTHESIS OF ANTHRACYCLINONES .18. NOVEL DIOXEPINS FROM THE BORON-TRIFLUORIDE CATALYZED CYCLIZATION OF METHALLYL ANTHRAQUINONE ACETALS, Australian Journal of Chemistry, 46(5), 1993, pp. 703-712
Boron trifluoride mediated cyclizations of ortho-methallyl-substituted
homochiral anthraquinone acetals yield novel dioxepins, which are pro
bably formed via free carbocation intermediates.