Copper(II)-Catalyzed Room Temperature Aerobic Oxidation of Hydroxamic Acids and Hydrazides to Acyl-Nitroso and Azo Intermediates, and Their Diels–Alder Trapping
作者:Duangduan Chaiyaveij、Leah Cleary、Andrei S. Batsanov、Todd B. Marder、Kenneth J. Shea、Andrew Whiting
DOI:10.1021/ol201188d
日期:2011.7.1
2-ethyl-2-oxazoline ligand, is an effective catalyst for the room temperature, aerobicoxidation of hydroxamic acids and hydrazides, to acyl-nitroso and azo dienophiles respectively, which are efficiently trapped in situ via both inter- and intramolecular hetero-Diels–Alder reactions with dienes. Both inter- and intramolecular variants of the Diels–Alder reaction are suitable under the reaction conditions using a variety
Copper-Catalyzed Aerobic Oxidation of <i>N</i>-Substituted Hydroxylamines: Efficient and Practical Access to Nitroso Compounds
作者:Charles P. Frazier、Alejandro Bugarin、Jarred R. Engelking、Javier Read de Alaniz
DOI:10.1021/ol301414k
日期:2012.7.20
A general and efficient aerobic oxidation of N-substituted hydroxylamines is described. The mild reaction conditions employed provide a catalytic and sustainable alternative to stoichiometric oxidation methods to gain access to a range of nitroso compounds, such as acylnitroso, nitrosoformate, nitrosoformamide, iminonitroso, arylnitroso, and P-nitrosophosphine oxide derivatives in excellent yield.