The desymmetrization of prochiral 4,4-disubstituted cyclopentenes via a site-selective copper-catalyzed allylic oxidation is described. This study provides a direct comparison of a series of known methods for allylic oxidation, and thus identifies ligand-free copper(I) iodide as the optimal catalyst for this particular process. Notably, this work offers a convenient approach to the preparation of γ-quaternary
描述了通过位点选择性的
铜催化的烯丙基氧化对前手性4,4-二取代的
环戊烯进行脱对称。该研究提供了一系列已知的烯丙基氧化方法的直接比较,从而确定了不含
配体的
碘化亚铜(I)作为该特定工艺的最佳催化剂。值得注意的是,这项工作为制备γ-α,β-不饱和
环戊烯酮季
铵盐提供了便利的方法,从而可以有效地进行三步全合成(±)-烯酮A.