Alkene Hydrofunctionalization Using Hydroxamic Acids: A Radical-Mediated Approach to Alkene Hydration
作者:Benjamin C. Giglio、Erik J. Alexanian
DOI:10.1021/ol5020202
日期:2014.8.15
A radical-mediated approach to alkene hydration is described. The present strategy capitalizes on the unique radical reactivity of hydroxamicacids, which are capable of functioning as both synthetically useful oxygen-centered radical species and suitable hydrogen atom-based donors. This reaction manifold has been applied to both alkene hydrations and tandem alkene–alkene carbocyclization processes
Radical carbooxygenations of alkenes using hydroxamic acids
作者:Ryan K. Quinn、Valerie A. Schmidt、Erik J. Alexanian
DOI:10.1039/c3sc51466h
日期:——
approach to alkene carbooxygenation usinghydroxamicacids is described. These transformations represent rare examples of direct carbooxygenations, and deliver versatile functionality to the unsaturated substrate. Included in this study are alkene oxyallylation, oxycyanation, and formal oxyacylation processes. These unique reactions capitalize on the reactivity of amidoxyl radicals in alkene additions
Metal-Free, Aerobic Dioxygenation of Alkenes Using Hydroxamic Acids
作者:Valerie A. Schmidt、Erik J. Alexanian
DOI:10.1002/anie.201000843
日期:2010.6.14
One dioxygenation please, hold the metal: In the presence of either oxygen or air as the sole oxidant and external oxygen atom source, a variety of unsaturated hydroxamicacids afford cyclic hydroxamates that are readily converted into 1,2‐diols, with the potential for high levels of reaction stereocontrol.
Metal-Free Oxyaminations of Alkenes Using Hydroxamic Acids
作者:Valerie A. Schmidt、Erik J. Alexanian
DOI:10.1021/ja204255e
日期:2011.8.3
A radical-mediated approach to metal-freealkene oxyamination is described. This method capitalizes on the unique reactivity of the amidoxyl radical in alkene additions to furnish a general difunctionalization using simple diisopropyl azodicarboxylate (DIAD) as a radical trap. This protocol capitalizes on the intramolecular nature of the process, providing single regioisomers in all cases. Difunctionalizations