The challenging vicinal quaternary and tertiary stereocenters of the 5,10b-ethanophenanthridine skeleton are created in a single step utilizing intramolecular [3 + 2]-cycloaddition of nonstabilized azomethine ylide as the key step. The application of the chemistry is demonstrated by synthesizing (±)-maritidine.
5,10b-ethantphenanthridine骨架的具有挑战性的邻域的四级和三级立体中心是通过一步法创建的,该步骤利用未稳定的甲
亚胺叶立德的分子内[3 + 2]-环加成作为关键步骤。该
化学的应用通过合成(±)-马替丁来证明。