A Concise Synthesis of (−)-Aplyviolene Facilitated by a Strategic Tertiary Radical Conjugate Addition
作者:Martin J. Schnermann、Larry E. Overman
DOI:10.1002/anie.201204977
日期:2012.9.17
A second‐generation synthesis of the rearranged spongian diterpene aplyviolene is reported. The key step is the addition of a trialkyl tertiary radical generated by photoredox‐mediated fragmentation of a N‐(acyloxy)phthalimide to an α‐chloropentenone (see scheme). This process fashioned a quaternary stereocenter while combining two units of significant complexity.
报道了重排海绵二萜 aplyviolene 的第二代合成。关键步骤是将通过光氧化还原介导的N-(酰氧基)邻苯二甲酰亚胺碎裂生成的三烷基叔自由基添加到 α-氯戊烯酮上(参见方案)。这个过程形成了一个四元立体中心,同时结合了两个非常复杂的单元。