Highly functionalized 1,5,2-dioxazinanes could be smoothly produced via a Sc(OTf)3-catalyzed chemoselective [3 + 3] cycloaddition of various N-arylnitrones with a series of donor–acceptor oxiranes. This reaction involves in situ generation of 1,3-dipoles through Sc(OTf)3-catalyzed C–C bond cleavage of oxiranes and moderate to high yields were obtained for most substrates. This transformation features
通过Sc(OTf) 3催化的各种N-芳基硝酮与一系列供体-受体
环氧乙烷的
化学选择性[3 + 3]环加成反应,可以顺利生产高度功能化的1,5,2-二恶嗪烷。该反应涉及通过 Sc(OTf) 3催化的
环氧乙烷 C-C 键断裂原位生成 1,3-偶极子,并且大多数底物都获得了中等到高产率。该转化的特点是供体-受体
环氧乙烷的 C-C 键断裂、起始原料易于获得以及反应条件温和。