Using Nazarov Electrocyclization to Stage Chemoselective [1,2]-Migrations: Stereoselective Synthesis of Functionalized Cyclopentenones
作者:David Lebœuf、Jie Huang、Vincent Gandon、Alison J. Frontier
DOI:10.1002/anie.201104870
日期:2011.11.11
Highly functionalized cyclopentenones have been prepared stereospecifically through a chemoselective copper(II)‐mediated Nazarov/Wagner–Meerwein rearrangement sequence. After the initial 4π electrocyclization, this reaction involves two sequential [1,2]‐migrations depending upon both migratory ability and steric bulk of the substituents at C1 and C5 (see scheme). The proposed mechanism of the reaction
已经通过化学选择性铜(II)介导的 Nazarov/Wagner-Meerwein 重排序列立体特异性地制备了高度官能化的环戊烯酮。在最初的 4π 电环化之后,该反应涉及两个连续的 [1,2]-迁移,这取决于迁移能力和 C1 和 C5 上取代基的空间体积(见方案)。所提出的反应机理得到了 DFT 研究的支持。