Catalyzed Olefin Isomerization Leading to Highly Stereoselective Claisen Rearrangements of Aliphatic Allyl Vinyl Ethers
作者:Scott G. Nelson、Christopher J. Bungard、Kan Wang
DOI:10.1021/ja037655v
日期:2003.10.1
stereoselective Claisen rearrangements. Catalyzed alkene isomerization affords allyl vinyl ethers from easily prepared di(allyl) ethers; direct thermolysis of these reaction mixtures leads to highly diastereoselective [3,3] sigmatropic rearrangements affording syn-2,3-dialkyl-4-pentenal derivatives. An easily executed strategy for realizing asymmetric variants of the isomerization-Claisen rearrangement (ICR) reactions
在双(烯丙基)醚中铱(I)催化的烯烃异构化被整合到影响高度立体选择性克莱森重排的普遍适用的策略中。催化烯烃异构化从容易制备的二(烯丙基)醚提供烯丙基乙烯基醚;这些反应混合物的直接热解导致高度非对映选择性的 [3,3] σ 重排,提供了 Syn-2,3-二烷基-4-戊烯醛衍生物。还描述了一种用于实现异构化-克莱森重排 (ICR) 反应的不对称变体的易于执行的策略。