Asymmetric formal total synthesis of the stemofoline alkaloids: the evolution, development, and application of a catalytic dipolar cycloaddition cascade
作者:Charles S. Shanahan、Chao Fang、Daniel H. Paull、Stephen F. Martin
DOI:10.1016/j.tet.2013.03.104
日期:2013.9
operation from an acyclic precursor. The key step in the synthesis is a novel dipolarcycloadditioncascade sequence that is initiated by cyclization of a rhodium-derived carbene onto the nitrogen atom of a proximal imine group to generate an azomethine ylide that then undergoes spontaneous cyclization via dipolarcycloaddition. The synthesis features several other interesting reactions, including a Boord