Development of a Nazarov Cyclization/Wagner−Meerwein Rearrangement Sequence for the Stereoselective Synthesis of Spirocycles
作者:Jie Huang、Alison J. Frontier
DOI:10.1021/ja0716148
日期:2007.7.1
stereoselective Nazarov cyclization/Wagner−Meerwein rearrangement sequence for the synthesis of spirocyclic compounds was developed. While a range of different substrate types engaged in the cyclization/rearrangement sequence, it was found that different substrates underwent different reaction pathways. Depending on the substitution pattern of the substrate, the sequence was terminated by either a hydride
开发了用于合成螺环化合物的立体选择性 Nazarov 环化/Wagner-Meerwein 重排序列。虽然一系列不同的底物类型参与环化/重排序列,但发现不同的底物经历不同的反应途径。根据底物的取代模式,该序列通过氢化物位移或乙烯基或芳基的位移而终止。也可以使用此协议安装相邻的四元立体中心。发现 Wagner-Meerwein 重排的效率取决于用于生成中间体氧烯丙基阳离子的促进剂的类型和数量。