Enantioselective Synthesis of Tetraponerines by Pd- and Ru-Catalyzed Domino Reactions
作者:Roland Stragies、Siegfried Blechert
DOI:10.1021/ja001688i
日期:2000.10.1
Pd-catalyzed domino allylation and a Ru-catalyzed ring rearrangement. The effect of different substituents on the equilibrium of the metathesis rearrangement has been investigated. To complete the synthesis a sequence of Wacker oxidation and Takai olefination was used. The preparation of four representative tetraponerines differing in stereochemistry, ring size, and side chain employing five metal-organic
描述了以 24-36% 的总产率对映选择性合成四酮素 T4、T6、T7 和 T8。该合成的关键步骤是 Pd 催化的多米诺烯丙基化和 Ru 催化的环重排。已经研究了不同取代基对复分解重排平衡的影响。为了完成合成,使用了瓦克氧化和 Takai 烯化的顺序。使用五种金属-有机反应制备四种在立体化学、环大小和侧链上不同的代表性四萜内酯清楚地证明了过渡金属在有机合成中的效率。