Experiments Directed Towards the Synthesis of Anthracyclinones. XVI. Tin(IV)- and Titanium(IV)-Mediated Cyclizations of ortho-Allyl-Substituted Homochiral Hydroxyanthraquinone Dioxolans
Experiments Directed Towards the Synthesis of Anthracyclinones. XVIII. Novel Dioxepins From the Boron-Trifluoride Catalyzed Cyclization of Methallyl Anthraquinone Acetals
作者:RC Cambie、SE Holroyd、PS Rutledge、PD Woodgate
DOI:10.1071/ch9930703
日期:——
Boron trifluoride mediated cyclizations of ortho-methallyl-substituted homochiral anthraquinone acetals yield novel dioxepins, which are probably formed via free carbocation intermediates.