Evidence for a Sigmatropic and an Ionic Pathway in the Winstein Rearrangement
作者:Amy A. Ott、Mary H. Packard、Manuel A. Ortuño、Alayna Johnson、Victoria P. Suding、Christopher J. Cramer、Joseph J. Topczewski
DOI:10.1021/acs.joc.8b00961
日期:2018.8.3
The spontaneous rearrangement of allylic azides is thought to be a sigmatropicreaction. Presented herein is a detailed investigation into the rearrangement of several allylic azides. A combination of experiments including equilibrium studies, kinetic analysis, density functional theory calculations, and selective 15N-isotopic labeling are included. We conclude that the Winstein rearrangement occurs
Mild and Tunable Benzoic Acid Catalysts for Rearrangement Reactions of Allylic Alcohols
作者:J. Adam McCubbin、Samantha Voth、Oleg V. Krokhin
DOI:10.1021/jo201540p
日期:2011.10.21
An efficient and simple catalytic method for the isomerization of readily prepared allylic alcohols is described. We focus particularly on cyclic examples and the synthesis of unusual enyne and dienols. The benzoic acid catalysts employed are commercially available and very inexpensive and can be tuned for reactivity and substrate sensitivity.