Sc(OTf)<sub>3</sub>-Catalyzed Formal [3 + 3] Cycloaddition Reaction of Diaziridines and Quinones for the Synthesis of Benzo[<i>e</i>][1,3,4]oxadiazines
作者:Jose Cortes Vazquez、Jacqkis Davis、Vladimir N. Nesterov、Hong Wang、Weiwei Luo
DOI:10.1021/acs.orglett.1c00818
日期:2021.4.16
A formal [3 + 3] cyclization reaction of diaziridines and quinones has been developed offering 1,3,4-oxadiazinanes in generally high yields (up to 96%). The reaction was catalyzed by Sc(OTf)3 with a large substrate scope for both diaziridines and quinones. The synergistic activation of 1,3-dipolar diaziridines and the dipolar quinones was found to be essential to enable this reaction.
The coupling of diaziridines with donor–acceptor aziridines (DAAs) has been achieved using Zn-catalysis to furnish imidazopyrazole-4,4-dicarboxylates via [1,4]-hydride shift. The use of Zn-catalysis, [1,4]-hydride shift, natural product modification and a late-stage molecular docking study are important practical features.